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C79.19 ICD-10-CM Code: Secondary malignant neoplasm of other urinary organs

Compare with another codeCheck this code on a claim

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

Coding at a Glance

Tabular directives
2 Excludes1
Risk adjustment
CMS-HCC V28: 1 category · CMS-HCC V22 category 8 · RxHCC V08 category 18

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; the Instructions section marks which is which.

Excludes1Never report with this code
  • secondary carcinoid tumors (C7B.-)
  • secondary neuroendocrine tumors (C7B.-)

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 656 — KIDNEY AND URETER PROCEDURES FOR NEOPLASM WITH MCC (MDC 11)
  • MS-DRG 657 — KIDNEY AND URETER PROCEDURES FOR NEOPLASM WITH CC (MDC 11)
  • MS-DRG 658 — KIDNEY AND URETER PROCEDURES FOR NEOPLASM WITHOUT CC/MCC (MDC 11)
  • MS-DRG 686 — KIDNEY AND URINARY TRACT NEOPLASMS WITH MCC (MDC 11)
  • MS-DRG 687 — KIDNEY AND URINARY TRACT NEOPLASMS WITH CC (MDC 11)
  • MS-DRG 688 — KIDNEY AND URINARY TRACT NEOPLASMS WITHOUT CC/MCC (MDC 11)

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 18 — Cancer Metastatic to Bone, Other and Unspecified Metastatic Cancer; Acute Leukemia Except Myeloid (supersedes 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 C79.19 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 C79.19 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 C79

Coder workflow for C79.19

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

Before you code C79.19

  1. 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 →

  2. Check the Excludes1 note: if the documentation supports a condition named there, do not simply proceed with C79.19. 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 C79.19’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

Consider C79.19. 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.
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 C79.19(2 notes)

    Coding workflow: If the documentation supports a condition named in this note, do not simply proceed with C79.19: the two are not reported together. The one exception is when the record shows the two conditions are unrelated to each other.

    CompareC7B

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

Coding decision scenarios

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

Documentation: Both the condition C79.19 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

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 C79.19 with…

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

The codes most likely to be picked instead of C79.19 — 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— 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 moves the case to C7B; the two are not reported together unless documented as unrelated.

    Full comparison: C79.19 vs C7B →

  • C79.10— 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 urinary organs” takes C79.10; specificity in the record moves it back here.

    Full comparison: C79.19 vs C79.10 →

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 other urinary organs is a billable ICD-10-CM diagnosis code (C79.19).

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

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 C79.19 or its code family, from the CMS Table of Neoplasms.

Referenced by 12 Same-site neoplasm codes: C66 — Malignant neoplasm of ureterCompare C79.19 vs C66 →, C68.0 — Malignant neoplasm of urethraCompare C79.19 vs C68.0 →, C68.1 — Malignant neoplasm of paraurethral glandsCompare C79.19 vs C68.1 →, C68.8 — Malignant neoplasm of overlapping sites of urinary organsCompare C79.19 vs C68.8 →, D09.19 — Carcinoma in situ of other urinary organsCompare C79.19 vs D09.19 →, D30.2 — Benign neoplasm of ureterCompare C79.19 vs D30.2 →, D30.4 — Benign neoplasm of urethraCompare C79.19 vs D30.4 →, D30.8 — Benign neoplasm of other specified urinary organsCompare C79.19 vs D30.8 →, D41.2 — Neoplasm of uncertain behavior of ureterCompare C79.19 vs D41.2 →, D41.3 — Neoplasm of uncertain behavior of urethraCompare C79.19 vs D41.3 →, D41.8 — Neoplasm of uncertain behavior of other specified urinary organsCompare C79.19 vs D41.8 →, D49.59 — Neoplasm of unspecified behavior of other genitourinary organCompare C79.19 vs D49.59 →.

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 25 clinically related codes on its CMS exclusion list.

Named in the grouper logic of 6 MS-DRGs: DRG 656 (MDC 11), DRG 657 (MDC 11), DRG 658 (MDC 11), DRG 686 (MDC 11), DRG 687 (MDC 11), DRG 688 (MDC 11).

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, 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, C79.10 — Secondary malignant neoplasm of unspecified urinary organs, C79.11 — Secondary malignant neoplasm of bladder, 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, C80.0 — Disseminated malignant neoplasm, unspecified, +4 more

Same CMS-HCC risk category (V28)

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

C77.0 — Secondary and unspecified malignant neoplasm of lymph nodes of head, face and neck, C77.2 — Secondary and unspecified malignant neoplasm of intra-abdominal 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, C77.9 — Secondary and unspecified malignant neoplasm of lymph node, unspecified, C79.10 — Secondary malignant neoplasm of unspecified urinary organs, C79.11 — Secondary malignant neoplasm of bladder, C79.2 — Secondary malignant neoplasm of skin, C79.51 — Secondary malignant neoplasm of bone, C79.52 — Secondary malignant neoplasm of bone marrow, C79.60 — Secondary malignant neoplasm of unspecified ovary, C79.61 — Secondary malignant neoplasm of right ovary, C79.62 — Secondary malignant neoplasm of left ovary, C79.63 — Secondary malignant neoplasm of bilateral ovaries, C79.81 — Secondary malignant neoplasm of breast, C79.82 — Secondary malignant neoplasm of genital organs, C79.89 — Secondary malignant neoplasm of other specified sites, C79.9 — Secondary malignant neoplasm of unspecified site, C80.0 — Disseminated malignant neoplasm, unspecified, C91.00 — Acute lymphoblastic leukemia not having achieved remission, +5 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 Lung, Liver, Brain, and Other Organs; Acute Myeloid Leukemia Except Promyelocytic, 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).

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, C79.10 — Secondary malignant neoplasm of unspecified urinary organs, C79.11 — Secondary malignant neoplasm of bladder, C79.2 — Secondary malignant neoplasm of skin, 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, C79.49 — Secondary malignant neoplasm of other parts of nervous system, C79.51 — Secondary malignant neoplasm of bone, C79.52 — Secondary malignant neoplasm of bone marrow, C79.60 — Secondary malignant neoplasm of unspecified ovary, C79.61 — Secondary malignant neoplasm of right ovary, C79.62 — Secondary malignant neoplasm of left ovary, +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.

Iron Panel, Prothrombin Time Test and INR (PT/INR)

Contextual Map

Every relationship of C79.19 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.

Hierarchy

Same site (12)

Referenced by Same-site neoplasm codes (12)

Clinical classification (CCSR)

Risk adjustment (CMS-HCC)

  • HCC 18 — Cancer Metastatic to Bone, Other and Unspecified Metastatic Cancer; Acute Leukemia Except Myeloid [CMS-HCC]: “Cancer Metastatic to Bone, Other and Unspecified Metastatic Cancer; Acute Leukemia Except Myeloid — supersedes 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

MDC crossing

  • MDC 11 — Diseases and Disorders of the Kidney and Urinary Tract[MDC crossing]: “Diseases and Disorders of the Kidney and Urinary Tract — 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. 3,578 same-MDC procedures group here; browse them on the MDC page.”— CMS MS-DRG Definitions Manual · FY2027

Neoplasm sites (9)

  • Neoplasm, neoplastic, bulbourethral gland — Neoplasm, neoplastic, bulbourethral gland — Malignant, Secondary [Neoplasm table]: “Neoplasm, neoplastic, bulbourethral gland (Malignant, Secondary)”— CMS Table of Neoplasms · icd10cm-fy2027
  • Neoplasm, neoplastic, Cowper's gland — Neoplasm, neoplastic, Cowper's gland — Malignant, Secondary [Neoplasm table]: “Neoplasm, neoplastic, Cowper's gland (Malignant, Secondary)”— CMS Table of Neoplasms · icd10cm-fy2027
  • Neoplasm, neoplastic, paraurethral, gland — Neoplasm, neoplastic, paraurethral, gland — Malignant, Secondary [Neoplasm table]: “Neoplasm, neoplastic, paraurethral, gland (Malignant, Secondary)”— CMS Table of Neoplasms · icd10cm-fy2027
  • Neoplasm, neoplastic, prostate (gland), utricle — Neoplasm, neoplastic, prostate (gland), utricle — Malignant, Secondary [Neoplasm table]: “Neoplasm, neoplastic, prostate (gland), utricle (Malignant, Secondary)”— CMS Table of Neoplasms · icd10cm-fy2027
  • Neoplasm, neoplastic, Skene's gland — Neoplasm, neoplastic, Skene's gland — Malignant, Secondary [Neoplasm table]: “Neoplasm, neoplastic, Skene's gland (Malignant, Secondary)”— CMS Table of Neoplasms · icd10cm-fy2027
  • Neoplasm, neoplastic, ureter, ureteral — Neoplasm, neoplastic, ureter, ureteral — Malignant, Secondary [Neoplasm table]: “Neoplasm, neoplastic, ureter, ureteral (Malignant, Secondary)”— CMS Table of Neoplasms · icd10cm-fy2027
  • Neoplasm, neoplastic, urethra, urethral (gland) — Neoplasm, neoplastic, urethra, urethral (gland) — Malignant, Secondary [Neoplasm table]: “Neoplasm, neoplastic, urethra, urethral (gland) (Malignant, Secondary)”— CMS Table of Neoplasms · icd10cm-fy2027
  • Neoplasm, neoplastic, urinary organ or system, specified sites NEC — Neoplasm, neoplastic, urinary organ or system, specified sites NEC — Malignant, Secondary [Neoplasm table]: “Neoplasm, neoplastic, urinary organ or system, specified sites NEC (Malignant, Secondary)”— CMS Table of Neoplasms · icd10cm-fy2027
  • and 1 more

Nearest codes (33)

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 (9)

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, bulbourethral gland — Malignant, Secondary
  • Neoplasm, neoplastic, Cowper's gland — Malignant, Secondary
  • Neoplasm, neoplastic, paraurethral, gland — Malignant, Secondary
  • Neoplasm, neoplastic, prostate (gland), utricle — Malignant, Secondary
  • Neoplasm, neoplastic, Skene's gland — Malignant, Secondary
  • Neoplasm, neoplastic, ureter, ureteral — Malignant, Secondary
  • Neoplasm, neoplastic, urethra, urethral (gland) — Malignant, Secondary
  • Neoplasm, neoplastic, urinary organ or system, specified sites NEC — Malignant, Secondary
  • Neoplasm, neoplastic, utricle, prostatic — 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 20, 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. "C79.19 — Secondary malignant neoplasm of other urinary organs." ICD-10-CM FY2027. https://medcoder.ai/icd10/code/c79.19-secondary-malignant-neoplasm-of-other-urinary-organs

Change history

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

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 C79.19 in its code family, with their registry titles.

View all codes in the C79 family