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C78.01 ICD-10-CM Code: Secondary malignant neoplasm of right lung

Compare with another code for C78.01Check this code on a claim

Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.

Coding at a Glance

Official instructions
2 Excludes1 · 1 Excludes2
Risk adjustment
CMS-HCC V28: 1 category · CMS-HCC V22 category 8 · RxHCC V08 category 18

What these terms mean →

Billable · FY2027A valid, specific ICD-10-CM code, reportable for dates of service in FY2027.

What you need to know

Source: CMS/NCHS Official ICD-10-CM tabular notes, quoted. From the CMS/NCHS tabular list for the release in force. A note the category or block publishes applies to this code too, and is marked with where it comes from.

Excludes1from C78Not reported with this code unless documented as unrelated
  • secondary carcinoid tumors of liver (C7B.02)
  • secondary carcinoid tumors of peritoneum (C7B.04)
Excludes2from C78Not included here; may be reported together
  • lymph node metastases (C77.0)

Where it sits Source: CMS/NCHS

Under:Chapter 2: NeoplasmsC00-C96 Malignant neoplasmsC76-C80 Malignant neoplasms of ill-defined, other secondary and unspecified sitesC78 Secondary malignant neoplasm of respiratory and digestive organsC78.0 Secondary malignant neoplasm of lung

Most relevant related codes MedCoder-derived

Read off the official notes above and this code’s own position in the tabular list. Which to report is a documentation question; Compare shows the two side by side.

CompareCheck ClaimView Related Codes

Inpatient Payment Groups (MS-DRG)

Potential MS-DRG participation — not a DRG assignment.

MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v44, Appendix B.

  • MS-DRG 180 — RESPIRATORY NEOPLASMS WITH MCC (MDC 04)
  • MS-DRG 181 — RESPIRATORY NEOPLASMS WITH CC (MDC 04)
  • MS-DRG 182 — RESPIRATORY NEOPLASMS WITHOUT CC/MCC (MDC 04)

A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.

Risk Adjustment (CMS-HCC)

Payment categories this diagnosis maps to under CMS-HCC V28, payment year 2026.

  • HCC 17 — Cancer Metastatic to Lung, Liver, Brain, and Other Organs; Acute Myeloid Leukemia Except Promyelocytic (supersedes HCC 18, HCC 19, HCC 20, HCC 21, HCC 22, HCC 23)

Other models: CMS-HCC V22 HCC 8 · RxHCC V08 HCC 18

Risk scores depend on the enrollee's full accepted diagnosis set and segment; a category mapping alone does not determine payment.

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for C78.01 in the official ICD-10-CM tabular list, quoted as published.

Source: CMS/CDC — ICD-10-CM Tabular ListRelease: FY2027Effective: October 1, 2026

Trace:FY2027 changesChange historyRelease, file and checksum

Notes without a marker are published on C78.01 itself; “inherited from” names the category or block whose note applies here.

Excludes1 — Not Coded Here

Conditions generally not reported together with this code (Excludes1) -- an error unless the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

Source: inherited from C78

Excludes2 — Not Included Here

Conditions not covered by this code, but which may be reported alongside it when both are present.

Source: inherited from C78

Coder workflow for C78.01

MedCoder structured workflow — derived from this code’s own official record

Before you code C78.01

  1. Laterality is coded in this family. Confirm the side documented — right, left, or bilateral — and select the matching code (this page’s code: right). The unspecified-side code applies only when the record states no side. Laterality is assigned from the documented side; where a bilateral code exists and both sides are documented, it is used instead of two unilateral codes (Guidelines I.B.13).

    ReviewC78.02 · left, C78.00 · unspecified

    Guide: Laterality coding →

  2. Confirm the documented site and behavior (this code’s block classifies malignant neoplasms), whether the site is primary or secondary, and whether the malignancy is current or a personal history: a previously excised malignancy with no further treatment and no evidence of disease is history, not current disease. Verify the site against the Table of Neoplasms. Neoplasm chapter guidelines (Guidelines I.C.2.a, I.C.2.d, I.C.2.m).

    See the Table of Neoplasms entries · Guide: Active cancer vs history of cancer →

  3. Check the Excludes1 note: if the documentation supports a condition named there, do not simply proceed with C78.01. Excludes1 conditions are not reported together with this code unless the record shows they are unrelated (Guidelines I.A.12.a).

    See the official tabular notes

Choose the right path

  1. Does the documentation support a condition named in C78.01’s Excludes1 note?
    Yes → Do not simply proceed: review the excluded code. Both are reported only when the record shows the two conditions are unrelated.
    No → Continue.

    ReviewC7B.02, C7B.04

  2. Is the side documented?
    Yes → Select the code for the documented side (or the bilateral code when both sides are documented and one exists).
    No → Use the unspecified-side code only when the record states no side; a query is the alternative.

    ReviewC78.02 · left, C78.00 · unspecified

Consider C78.01. Then confirm the code is valid for the date of service in the Verify section.

Documentation check

The provider’s diagnostic statement
Codes are assigned from the provider’s documented diagnosis, not from clinical criteria, test values or a medication list (Guidelines I.A.19).
Anatomical site
At the most specific level the record states; a site the classification separates cannot be assumed from a procedure or a measurement.
Laterality
Right, left or bilateral as documented; unspecified only when the record states no side (Guidelines I.B.13).
Behavior and current-versus-history status
Malignant, in situ, benign or uncertain; primary or secondary; current disease or personal history (Guidelines I.C.2.m).

Official instructions as workflow

  • Excludes1 — check before selecting C78.01(2 notes)

    Coding workflow: If the documentation supports a condition named in this note, do not simply proceed with C78.01: the two are not reported together. The one exception is when the record shows the two conditions are unrelated to each other.

    CompareC7B.02, C7B.04

    See the official tabular notes · Guidelines I.A.12.a

  • Excludes2 — not part of C78.01(1 note)

    Coding workflow: The conditions named in this note are not included in C78.01. When the record documents both, both may be reported; the note is a boundary, not a prohibition.

    CompareC77.0

    See the official tabular notes · Guidelines I.A.12.b

Coding decision scenarios

Pattern scenarios for this code’s structure — decision rules, not clinical cases

Documentation: Both the condition C78.01 describes and a condition named in its Excludes1 note are documented for the same encounter.

Coding question: Can both codes be reported?

Path: Review the Excludes1 note and the excluded code, and look for a provider statement on whether the two conditions are related.

Reason: Excludes1 means the two are not coded together; the exception is when the record shows the conditions are unrelated to each other (Guidelines I.A.12.a).

ReviewC7B.02, C7B.04

Documentation: The record documents the condition on one side only.

Coding question: Which code in this family applies?

Path: Select the sibling code for the documented side.

Reason: Laterality is assigned from the documented side; the unspecified-side code is for records that state no side (Guidelines I.B.13).

ReviewC78.02 · left, C78.00 · unspecified

Every row is derived from this code’s own record — its title, tabular notes, 7th-character family and same-category siblings — with fixed MedCoder wording; nothing is inferred about a patient. The official notes and guideline text are in the sections each row links to, and they control.

Don’t confuse C78.01 with…

MedCoder analysis — pairs from this code’s official notes, distinctions written by MedCoder

The codes most likely to be picked instead of C78.01 — named in its own official notes, or sharing its laterality or encounter family — with what separates them and which documentation moves the case. Each links to the full comparison.

  • C7B.02— Excludes1 conflict (Excludes1 — generally not reported together)

    Not coded here — the tabular list excludes this pair for the same encounter.

    Not reported together with this code, except where the two conditions are documented as unrelated.

    What moves you there: Documentation of secondary carcinoid tumors of liver moves the case to C7B.02; the two are not reported together unless documented as unrelated.

    Full comparison: C78.01 vs C7B.02 →

  • C7B.04— Excludes1 conflict (Excludes1 — generally not reported together)

    Not coded here — the tabular list excludes this pair for the same encounter.

    Not reported together with this code, except where the two conditions are documented as unrelated.

    What moves you there: Documentation of secondary carcinoid tumors of peritoneum moves the case to C7B.04; the two are not reported together unless documented as unrelated.

    Full comparison: C78.01 vs C7B.04 →

  • C78.00— Specificity relationship (Review)

    Overlapping diagnoses in the same category.

    Overlapping codes in the same category — the documentation decides which is the more specific fit.

    What moves you there: A record that documents no more than “Secondary malignant neoplasm of unspecified lung” takes C78.00; specificity in the record moves it back here.

    Full comparison: C78.01 vs C78.00 →

  • C78.02— Laterality relationship (Review)

    Same condition; these differ only in which side is documented.

    The same condition with a different side named (the opposite side, both sides, or none); the documented side decides, and a bilateral code, where one exists, replaces the pair when both sides are documented.

    What moves you there: A documented left side moves the case to C78.02.

    Full comparison: C78.01 vs C78.02 →

  • C77.0— Excludes2 relationship (Informational)

    Distinct conditions — both may be reported.

    A distinct condition — both may be reported when both are documented.

    What moves you there: Documentation of lymph node metastases adds C77.0; it is not part of this code and both may be reported when both are documented.

    Full comparison: C78.01 vs C77.0 →

Relationships are read from this code's own official notes, its laterality siblings and its encounter family; the wording of each distinction is MedCoder editorial, and the documentation named in each “what moves you there” line is the official note phrase or sibling title itself. Source: CMS ICD-10-CM tabular instructional notes; ICD-10-CM Official Guidelines, Section I.A.12.a.

Coding context

Guidelines, coding notes, decision aids, relationships (with MS-DRG and CCSR classification), hierarchy, HCC, coverage and the context map: what a coder reaches for after the core. Each section names whether it is official source data, a MedCoder-derived relationship or MedCoder editorial.

Code Overview

Secondary malignant neoplasm of right lung is a billable ICD-10-CM diagnosis code (C78.01).

MedCoder summary Summary composed by MedCoder from this code's official ICD-10-CM record. The tabular instructional notes themselves appear verbatim below.

Decision Points

The directives on this code's own record, as a pre-claim checklist.

  1. Laterality is coded in this family. Confirm the documented side matches the code — the opposite-side siblings are in the relationships section. See the opposite-side sibling codes
  2. 2 Excludes1 entries — codes named there are generally not reported together with this code (Guidelines I.A.12.a). See the Excludes1 notes
  3. 1 Excludes2 entry — those conditions are not part of this code and may be reported additionally when documented. See the Excludes2 notes

Checklist rows are derived from this code's own official directives; the wording of each check is MedCoder editorial. The official notes themselves are in the sections each row links to.

Verify Before Coding

  • CC as a secondary diagnosis (FY2027). Can raise the stay's MS-DRG severity tier.

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim in Claim Check.

Relationships & Classification

MedCoder-derived relationships — computed from published CMS and AHRQ datasets

Other codes that name C78.01 or its code family, from the CMS ICD-10-CM tabular instructional notes and the CMS Table of Neoplasms. Tabular-note edges are stored at the code family level that carries each note.

Referenced by 1 Code First instruction: J93.12 — Secondary spontaneous pneumothorax (via C78.0.-).

Each of these codes carries a Code First note naming this condition — when that code is reported, THIS code is sequenced first, ahead of it.

Referenced by 11 Same-site neoplasm codes: C34.0 — Malignant neoplasm of main bronchus (via C78.0.-)Compare C78.01 vs C34.0 →, C34.1 — Malignant neoplasm of upper lobe, bronchus or lung (via C78.0.-)Compare C78.01 vs C34.1 →, C34.2 — Malignant neoplasm of middle lobe, bronchus or lung (via C78.0.-)Compare C78.01 vs C34.2 →, C34.3 — Malignant neoplasm of lower lobe, bronchus or lung (via C78.0.-)Compare C78.01 vs C34.3 →, C34.9 — Malignant neoplasm of unspecified part of bronchus or lung (via C78.0.-)Compare C78.01 vs C34.9 →, D02.2 — Carcinoma in situ of bronchus and lung (via C78.0.-)Compare C78.01 vs D02.2 →, D02.21 — Carcinoma in situ of right bronchus and lung (via C78.0.-)Compare C78.01 vs D02.21 →, D14.3 — Benign neoplasm of bronchus and lung (via C78.0.-)Compare C78.01 vs D14.3 →, D14.31 — Benign neoplasm of right bronchus and lung (via C78.0.-)Compare C78.01 vs D14.31 →, D38.1 — Neoplasm of uncertain behavior of trachea, bronchus and lung (via C78.0.-)Compare C78.01 vs D38.1 →, D49.1 — Neoplasm of unspecified behavior of respiratory system (via C78.0.-)Compare C78.01 vs D49.1 →.

These codes represent related neoplasm behaviors affecting the same anatomic site.

MS-DRG Grouper Relationships (FY2027)

Potential MS-DRG participation — not a DRG assignment.

FY2027 MS-DRG: CC — Complication or Comorbidity. Reported as a secondary diagnosis, this code raises the stay's MS-DRG severity tier — except when the principal diagnosis is one of 26 clinically related codes on its CMS exclusion list.

Named in the grouper logic of 3 MS-DRGs: DRG 180 (MDC 04), DRG 181 (MDC 04), DRG 182 (MDC 04).

From the CMS MS-DRG Definitions Manual (Appendices B and C). Actual DRG assignment depends on the complete claim.

Clinical classification (AHRQ CCSR):NEO070 — Secondary malignancies (default).

Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality.

Related Codes

Same clinical process (MS-DRG)

Acts as CC — raises the severity of other admissions. CMS groups these diagnoses into one MS-DRG principal-diagnosis exclusion process — a CC/MCC on this list never raises severity when the principal diagnosis is also on it.

C45.7 — Mesothelioma of other sites, C45.9 — Mesothelioma, unspecified, C76.8 — Malignant neoplasm of other specified ill-defined sites, C78.00 — Secondary malignant neoplasm of unspecified lung, C78.02 — Secondary malignant neoplasm of left lung, C78.30 — Secondary malignant neoplasm of unspecified respiratory organ, C78.31 — Secondary malignant neoplasm of larynx, C78.32 — Secondary malignant neoplasm of pharynx, C78.39 — Secondary malignant neoplasm of other respiratory organs, C79.83 — Secondary malignant neoplasm of oral cavity, C79.89 — Secondary malignant neoplasm of other specified sites, C79.9 — Secondary malignant neoplasm of unspecified site, C7A.00 — Malignant carcinoid tumor of unspecified site, C7A.098 — Malignant carcinoid tumors of other sites, C7A.1 — Malignant poorly differentiated neuroendocrine tumors, C7A.8 — Other malignant neuroendocrine tumors, C7B.00 — Secondary carcinoid tumors, unspecified site, C7B.09 — Secondary carcinoid tumors of other sites, C7B.1 — Secondary Merkel cell carcinoma, C7B.8 — Other secondary neuroendocrine tumors, +5 more

Same condition, different side

Same title, differing only in which side of the body it names: right, left, bilateral or unspecified.

C78.00 — Secondary malignant neoplasm of unspecified lung (unspecified)Compare C78.01 vs C78.00 →, C78.02 — Secondary malignant neoplasm of left lung (left)Compare C78.01 vs C78.02 →

Same CMS-HCC risk category (V28)

CMS maps these diagnoses to the same Hierarchical Condition Category (Cancer Metastatic to Lung, Liver, Brain, and Other Organs; Acute Myeloid Leukemia Except Promyelocytic) for risk-adjusted payment.

C77.1 — Secondary and unspecified malignant neoplasm of intrathoracic lymph nodes, C77.8 — Secondary and unspecified malignant neoplasm of lymph nodes of multiple regions, C78.00 — Secondary malignant neoplasm of unspecified lung, C78.02 — Secondary malignant neoplasm of left lung, C78.1 — Secondary malignant neoplasm of mediastinum, C78.2 — Secondary malignant neoplasm of pleura, C78.30 — Secondary malignant neoplasm of unspecified respiratory organ, C78.39 — Secondary malignant neoplasm of other respiratory organs, C78.4 — Secondary malignant neoplasm of small intestine, C78.5 — Secondary malignant neoplasm of large intestine and rectum, C78.6 — Secondary malignant neoplasm of retroperitoneum and peritoneum, C78.7 — Secondary malignant neoplasm of liver and intrahepatic bile duct, C78.80 — Secondary malignant neoplasm of unspecified digestive organ, C78.89 — Secondary malignant neoplasm of other digestive organs, C79.00 — Secondary malignant neoplasm of unspecified kidney and renal pelvis, C79.01 — Secondary malignant neoplasm of right kidney and renal pelvis, C79.02 — Secondary malignant neoplasm of left kidney and renal pelvis, C79.31 — Secondary malignant neoplasm of brain, C79.32 — Secondary malignant neoplasm of cerebral meninges, C79.40 — Secondary malignant neoplasm of unspecified part of nervous system, +57 more

Related risk categories

These categories interact through CMS's HCC hierarchy — one can suppress the other's risk-adjustment weight when both are present on a claim.

Cancer Metastatic to Bone, Other and Unspecified Metastatic Cancer; Acute Leukemia Except Myeloid, Myelodysplastic Syndromes, Multiple Myeloma, and Other Cancers, Lung and Other Severe Cancers, Lymphoma and Other Cancers, Bladder, Colorectal, and Other Cancers, Prostate, Breast, and Other Cancers and Tumors

Same clinical category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical category (Secondary malignancies).

C77.0 — Secondary and unspecified malignant neoplasm of lymph nodes of head, face and neck, C77.1 — Secondary and unspecified malignant neoplasm of intrathoracic lymph nodes, C77.2 — Secondary and unspecified malignant neoplasm of intra-abdominal lymph nodes, C77.3 — Secondary and unspecified malignant neoplasm of axilla and upper limb lymph nodes, C77.4 — Secondary and unspecified malignant neoplasm of inguinal and lower limb lymph nodes, C77.5 — Secondary and unspecified malignant neoplasm of intrapelvic lymph nodes, C77.8 — Secondary and unspecified malignant neoplasm of lymph nodes of multiple regions, C77.9 — Secondary and unspecified malignant neoplasm of lymph node, unspecified, C78.00 — Secondary malignant neoplasm of unspecified lung, C78.02 — Secondary malignant neoplasm of left lung, C78.1 — Secondary malignant neoplasm of mediastinum, C78.2 — Secondary malignant neoplasm of pleura, C78.30 — Secondary malignant neoplasm of unspecified respiratory organ, C78.39 — Secondary malignant neoplasm of other respiratory organs, C78.4 — Secondary malignant neoplasm of small intestine, C78.5 — Secondary malignant neoplasm of large intestine and rectum, C78.6 — Secondary malignant neoplasm of retroperitoneum and peritoneum, C78.7 — Secondary malignant neoplasm of liver and intrahepatic bile duct, C78.80 — Secondary malignant neoplasm of unspecified digestive organ, C78.89 — Secondary malignant neoplasm of other digestive organs, +24 more

Lab tests where this diagnosis supports Medicare coverage (NCD)

Medicare's National Coverage Determination (NCD) program lists this diagnosis as medical justification for these lab tests.

CEA Test, Iron Panel

Contextual Map

Every relationship of C78.01 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Run C78.01 with this related code in Claim Check

Hierarchy

Referenced by Code First instructions

Referenced by Same-site neoplasm codes (11)

Clinical classification (CCSR)

Risk adjustment (CMS-HCC)

  • HCC 17 — Cancer Metastatic to Lung, Liver, Brain, and Other Organs; Acute Myeloid Leukemia Except Promyelocytic [CMS-HCC]: “Cancer Metastatic to Lung, Liver, Brain, and Other Organs; Acute Myeloid Leukemia Except Promyelocytic — supersedes HCC 18 (Cancer Metastatic to Bone, Other and Unspecified Metastatic Cancer; Acute Leukemia Except Myeloid), HCC 19 (Myelodysplastic Syndromes, Multiple Myeloma, and Other Cancers), HCC 20 (Lung and Other Severe Cancers), HCC 21 (Lymphoma and Other Cancers), HCC 22 (Bladder, Colorectal, and Other Cancers), HCC 23 (Prostate, Breast, and Other Cancers and Tumors)”— CMS-HCC V28 · 2026

MS-DRG Grouper

  • CC — Complication or Comorbidity [MS-DRG severity]: “As a secondary diagnosis this code can raise the stay's MS-DRG severity tier (CC).”— CMS MS-DRG Definitions Manual (Appendix C) · FY2027
  • DRG 180 — RESPIRATORY NEOPLASMS WITH MCC[MS-DRG]: “RESPIRATORY NEOPLASMS WITH MCC (MDC 04)”— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
  • DRG 181 — RESPIRATORY NEOPLASMS WITH CC[MS-DRG]: “RESPIRATORY NEOPLASMS WITH CC (MDC 04)”— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
  • DRG 182 — RESPIRATORY NEOPLASMS WITHOUT CC/MCC[MS-DRG]: “RESPIRATORY NEOPLASMS WITHOUT CC/MCC (MDC 04)”— CMS MS-DRG Definitions Manual (Appendix B) · FY2027

MDC crossing

  • MDC 04 — Diseases and Disorders of the Respiratory System[MDC crossing]: “Diseases and Disorders of the Respiratory System — the grouper's crossing between diagnoses and procedures: a principal diagnosis sets the MDC, and same-MDC procedures move the stay to its surgical DRGs. 4,000 same-MDC procedures group here; browse them on the MDC page.”— CMS MS-DRG Definitions Manual · FY2027

Neoplasm sites (23)

  • Neoplasm, neoplastic, bronchiogenic, bronchogenic (lung) — Neoplasm, neoplastic, bronchiogenic, bronchogenic (lung) — Malignant, Secondary [Neoplasm table]: “Neoplasm, neoplastic, bronchiogenic, bronchogenic (lung) (Malignant, Secondary)”— CMS Table of Neoplasms · icd10cm-fy2027
  • Neoplasm, neoplastic, bronchiole — Neoplasm, neoplastic, bronchiole — Malignant, Secondary [Neoplasm table]: “Neoplasm, neoplastic, bronchiole (Malignant, Secondary)”— CMS Table of Neoplasms · icd10cm-fy2027
  • Neoplasm, neoplastic, bronchus — Neoplasm, neoplastic, bronchus — Malignant, Secondary [Neoplasm table]: “Neoplasm, neoplastic, bronchus (Malignant, Secondary)”— CMS Table of Neoplasms · icd10cm-fy2027
  • Neoplasm, neoplastic, bronchus, carina — Neoplasm, neoplastic, bronchus, carina — Malignant, Secondary [Neoplasm table]: “Neoplasm, neoplastic, bronchus, carina (Malignant, Secondary)”— CMS Table of Neoplasms · icd10cm-fy2027
  • Neoplasm, neoplastic, bronchus, lower lobe of lung — Neoplasm, neoplastic, bronchus, lower lobe of lung — Malignant, Secondary [Neoplasm table]: “Neoplasm, neoplastic, bronchus, lower lobe of lung (Malignant, Secondary)”— CMS Table of Neoplasms · icd10cm-fy2027
  • Neoplasm, neoplastic, bronchus, main — Neoplasm, neoplastic, bronchus, main — Malignant, Secondary [Neoplasm table]: “Neoplasm, neoplastic, bronchus, main (Malignant, Secondary)”— CMS Table of Neoplasms · icd10cm-fy2027
  • Neoplasm, neoplastic, bronchus, middle lobe of lung — Neoplasm, neoplastic, bronchus, middle lobe of lung — Malignant, Secondary [Neoplasm table]: “Neoplasm, neoplastic, bronchus, middle lobe of lung (Malignant, Secondary)”— CMS Table of Neoplasms · icd10cm-fy2027
  • Neoplasm, neoplastic, bronchus, upper lobe of lung — Neoplasm, neoplastic, bronchus, upper lobe of lung — Malignant, Secondary [Neoplasm table]: “Neoplasm, neoplastic, bronchus, upper lobe of lung (Malignant, Secondary)”— CMS Table of Neoplasms · icd10cm-fy2027
  • and 15 more

Nearest codes (18)

Change history

  • FY2016 — In the code set at ICD-10-CM adoption [Change history]— CMS release files (code change ledger) · icd10cm-fy2016

Reference

Index terms and tables, published questions and FAQ, every source behind this page with its release and checksum, the date-of-service check and the complete change history.

Neoplasm Table Sites (23)

Official source data — entries quoted as published, in the Index’s own lookup phrasing

Anatomical sites from the official ICD-10-CM Table of Neoplasms that map to this code, with the matching behavior column.

  • Neoplasm, neoplastic, bronchiogenic, bronchogenic (lung) — Malignant, Secondary
  • Neoplasm, neoplastic, bronchiole — Malignant, Secondary
  • Neoplasm, neoplastic, bronchus — Malignant, Secondary
  • Neoplasm, neoplastic, bronchus, carina — Malignant, Secondary
  • Neoplasm, neoplastic, bronchus, lower lobe of lung — Malignant, Secondary
  • Neoplasm, neoplastic, bronchus, main — Malignant, Secondary
  • Neoplasm, neoplastic, bronchus, middle lobe of lung — Malignant, Secondary
  • Neoplasm, neoplastic, bronchus, upper lobe of lung — Malignant, Secondary
  • Neoplasm, neoplastic, carina (bronchus) — Malignant, Secondary
  • Neoplasm, neoplastic, hilus of lung — Malignant, Secondary
  • Neoplasm, neoplastic, lingula, lung — Malignant, Secondary
  • Neoplasm, neoplastic, lung — Malignant, Secondary
  • Neoplasm, neoplastic, lung, azygos lobe — Malignant, Secondary
  • Neoplasm, neoplastic, lung, carina — Malignant, Secondary
  • Neoplasm, neoplastic, lung, hilus — Malignant, Secondary
  • Neoplasm, neoplastic, lung, lingula — Malignant, Secondary
  • Neoplasm, neoplastic, lung, lobe NEC — Malignant, Secondary
  • Neoplasm, neoplastic, lung, lower lobe — Malignant, Secondary
  • Neoplasm, neoplastic, lung, main bronchus — Malignant, Secondary
  • Neoplasm, neoplastic, lung, middle lobe — Malignant, Secondary
  • Neoplasm, neoplastic, lung, upper lobe — Malignant, Secondary
  • Neoplasm, neoplastic, pulmonary — Malignant, Secondary
  • Neoplasm, neoplastic, subpleural — Malignant, Secondary

Sources for this page

Codes, titles, notes, index terms and mappings on this page are transcribed from the datasets below. Relationships MedCoder computed and text MedCoder wrote are labelled where they appear.

Code, title, tabular notes and index terms Official source data
CMS/CDC ICD-10-CM FY2027 tabular list, index and tables, effective October 1, 2026 Release, file and checksum · Publisher’s page
Claim edits Official source data
CMS Definitions of Medicare Code Edits — v44.0 (October 2026) Release, file and checksum · Publisher’s page
Inpatient payment groups Official source data
CMS MS-DRG Definitions Manual (incl. Appendix B diagnosis index, Appendix C CC/MCC list, Appendix E procedure index) and IPPS Final Rule tables — v44 Release, file and checksum · Publisher’s page
Risk adjustment Official source data
2026 Mid-Year Final ICD-10 Mappings + Model Software (cms.gov/files/zip/2026-midyear-final-icd-10-mappings.zip, 2026-midyear-final-model-software.zip) — CMS-HCC V28, PY2026 mid-year final release Release, file and checksum · Publisher’s page
Change history and date-of-service validity Official source data
CMS ICD-10-CM release addenda, ingested release by release into the change ledger Release, file and checksum · Publisher’s page
Comparisons, relationships and the contextual map MedCoder-derived relationship
Computed by MedCoder from the tabular notes and tables above; every derived relationship is marked as derived where it appears
Summary and FAQ answers MedCoder editorial explanation
Written by MedCoder to explain the sources above: drafted with AI assistance, checked by a person against the release files, and labelled as MedCoder text where it appears. Not official text.

Current data releases:ICD-10-CM FY2027 · ICD-10-PCS FY2027 · HCPCS October 2026 · MS-DRG v44 · Medicare Code Editor v44.0 · NCCI PTP Q4 2026 · MUE Q4 2026 · NCD code lists 2026-01 · LCD export September 28, 2026 · All releases and sources

Labels on this page: Official source data · MedCoder-derived relationship · MedCoder editorial explanation. How to read the labels · All data sources and release dates · CMS coding rules

Cite this page

Reference this page in a research guide, syllabus or article. The release is included because code content changes each year.

MedCoder.ai. "C78.01 — Secondary malignant neoplasm of right lung." ICD-10-CM FY2027. https://medcoder.ai/icd10/code/c78.01-secondary-malignant-neoplasm-of-right-lung

Change history

  • FY2016 — October 1, 2015
    In the code set at ICD-10-CM adoption
    Secondary malignant neoplasm of right lung

No changes since FY2016 — additions, deletions, description changes and billable-status changes are tracked through FY2027, and none are recorded for this code. Note changes are tracked from FY2027 only.

Nearest Codes in This Family

Official ICD-10-CM classifications closest to C78.01 in its code family, with their registry titles.

View all codes in the C78 family