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R84.0 ICD-10-CM Code: Abnormal level of enzymes in specimens from respiratory organs and thorax

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

Coding at a Glance

Tabular directives
5 inclusion terms · 3 Excludes1 · 3 Excludes2

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 v43, Appendix B.

  • MS-DRG 947 — SIGNS AND SYMPTOMS WITH MCC (MDC 23)
  • MS-DRG 948 — SIGNS AND SYMPTOMS WITHOUT MCC (MDC 23)

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.

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for R84.0 in the official ICD-10-CM tabular list, quoted as published.

Source: CMS/CDC — ICD-10-CM Tabular ListRelease: FY2026Effective: October 1, 2025

Notes without a marker are published on R84.0 itself; “inherited from” names the category or block whose note applies here.

Includes

Conditions the official ICD-10-CM tabular list includes under this code.

  • abnormal findings in bronchial washings
  • abnormal findings in nasal secretions
  • abnormal findings in pleural fluid
  • abnormal findings in sputum
  • abnormal findings in throat scrapings

Source: inherited from R84

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).

Excludes2 — Not Included Here

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

Source: inherited from R83-R89

Coder workflow for R84.0

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

Before you code R84.0

  1. Check whether an established diagnosis that explains this sign or symptom is documented. If one is, review whether the documented diagnosis changes the coding pathway: a symptom that is integral to a confirmed diagnosis is not reported separately, while one not routinely associated with it may be. Signs and symptoms are reported when no definitive diagnosis is established (Guidelines I.B.4, I.B.5, I.B.6, I.C.18.b).

    Guide: Symptom code vs confirmed diagnosis →

  2. Check the Excludes1 note: if the documentation supports a condition named there, do not simply proceed with R84.0. 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. Is an established diagnosis that explains this sign or symptom documented?
    Yes → Review whether the documented diagnosis changes the coding pathway: a symptom integral to it is not reported separately.
    No → Continue — the sign or symptom code stands when no definitive diagnosis is established.
  2. Does the documentation support a condition named in R84.0’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.

    ReviewR04.2, O28

Consider R84.0. 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).

Official instructions as workflow

  • Excludes1 — check before selecting R84.0(3 notes)

    Coding workflow: If the documentation supports a condition named in this note, do not simply proceed with R84.0: the two are not reported together. The one exception is when the record shows the two conditions are unrelated to each other.

    CompareR04.2, O28

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

  • Excludes2 — not part of R84.0(3 notes)

    Coding workflow: The conditions named in this note are not included in R84.0. When the record documents both, both may be reported; the note is a boundary, not a prohibition.

    CompareR97

    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: The sign or symptom is documented, and the same record establishes a diagnosis that routinely includes it.

Coding question: Is R84.0 reported in addition to the diagnosis?

Path: Review the documented diagnosis and whether the classification treats this finding as integral to it.

Reason: Signs and symptoms integral to a confirmed diagnosis are not coded separately; those not routinely associated with it may be reported when present (Guidelines I.B.5, I.B.6, I.C.18.b).

Documentation: Both the condition R84.0 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).

ReviewR04.2, O28

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.

Code Overview

Abnormal level of enzymes in specimens from respiratory organs and thorax is a billable ICD-10-CM diagnosis code (R84.0).

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

Indexed Clinical Terms (1)

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

Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code. These are alphabetic-index entries shown as the Index writes them — lookup phrasing, not necessarily the wording of a final diagnosis.

Verify Before Coding

  • No Medicare Code Editor or MS-DRG Definitions Manual restrictions apply to this code.

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 structured relationships — computed from published CMS and AHRQ datasets

MS-DRG Grouper Relationships (FY2026)

Potential MS-DRG participation — not a DRG assignment.

FY2026 MS-DRG: not on the CMS CC/MCC list — as a secondary diagnosis this code does not change MS-DRG severity for that release.

Named in the grouper logic of 2 MS-DRGs: DRG 947 (MDC 23), DRG 948 (MDC 23).

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

Clinical classification (AHRQ CCSR):SYM017 — Abnormal findings without diagnosis (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 category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical category (Abnormal findings without diagnosis).

R81 — Glycosuria, R83.0 — Abnormal level of enzymes in cerebrospinal fluid, R83.1 — Abnormal level of hormones in cerebrospinal fluid, R83.2 — Abnormal level of other drugs, medicaments and biological substances in cerebrospinal fluid, R83.3 — Abnormal level of substances chiefly nonmedicinal as to source in cerebrospinal fluid, R83.4 — Abnormal immunological findings in cerebrospinal fluid, R83.5 — Abnormal microbiological findings in cerebrospinal fluid, R83.6 — Abnormal cytological findings in cerebrospinal fluid, R83.8 — Other abnormal findings in cerebrospinal fluid, R83.9 — Unspecified abnormal finding in cerebrospinal fluid, R84.1 — Abnormal level of hormones in specimens from respiratory organs and thorax, R84.2 — Abnormal level of other drugs, medicaments and biological substances in specimens from respiratory organs and thorax, R84.3 — Abnormal level of substances chiefly nonmedicinal as to source in specimens from respiratory organs and thorax, R84.4 — Abnormal immunological findings in specimens from respiratory organs and thorax, R84.5 — Abnormal microbiological findings in specimens from respiratory organs and thorax, R84.6 — Abnormal cytological findings in specimens from respiratory organs and thorax, R84.7 — Abnormal histological findings in specimens from respiratory organs and thorax, R84.8 — Other abnormal findings in specimens from respiratory organs and thorax, R84.9 — Unspecified abnormal finding in specimens from respiratory organs and thorax, R85.0 — Abnormal level of enzymes in specimens from digestive organs and abdominal cavity, +183 more

Same Index main term, other category

The ICD-10-CM Index to Diseases and Injuries files this code under the main term “Abnormal, abnormality, abnormalities”; these codes share that main term but sit in a different category of the Tabular List.

R82.998 — Other abnormal findings in urine (urine, specified substance NEC), R83.0 — Abnormal level of enzymes in cerebrospinal fluid (cerebrospinal fluid, enzyme level), R83.1 — Abnormal level of hormones in cerebrospinal fluid (cerebrospinal fluid, hormones), R83.2 — Abnormal level of other drugs, medicaments and biological substances in cerebrospinal fluid (cerebrospinal fluid, drug level), R83.3 — Abnormal level of substances chiefly nonmedicinal as to source in cerebrospinal fluid (cerebrospinal fluid, nonmedicinal level), R83.4 — Abnormal immunological findings in cerebrospinal fluid (cerebrospinal fluid, immunology), R83.5 — Abnormal microbiological findings in cerebrospinal fluid (cerebrospinal fluid, microbiology), R83.6 — Abnormal cytological findings in cerebrospinal fluid (cerebrospinal fluid, cytology), R83.8 — Other abnormal findings in cerebrospinal fluid (cerebrospinal fluid, specified type NEC), R83.9 — Unspecified abnormal finding in cerebrospinal fluid (cerebrospinal fluid), R85.0 — Abnormal level of enzymes in specimens from digestive organs and abdominal cavity (specimen, digestive organs, enzyme level), R85.1 — Abnormal level of hormones in specimens from digestive organs and abdominal cavity (specimen, digestive organs, hormones), R85.2 — Abnormal level of other drugs, medicaments and biological substances in specimens from digestive organs and abdominal cavity (specimen, digestive organs, drug level), R85.3 — Abnormal level of substances chiefly nonmedicinal as to source in specimens from digestive organs and abdominal cavity (specimen, digestive organs, nonmedicinal level), R85.4 — Abnormal immunological findings in specimens from digestive organs and abdominal cavity (specimen, digestive organs, immunology), R85.5 — Abnormal microbiological findings in specimens from digestive organs and abdominal cavity (specimen, digestive organs, microbiology), R85.610 — Atypical squamous cells of undetermined significance on cytologic smear of anus (ASC-US) (cytology, anus, atypical squamous cells of undetermined significance), R85.611 — Atypical squamous cells cannot exclude high grade squamous intraepithelial lesion on cytologic smear of anus (ASC-H) (cytology, anus, atypical squamous cells cannot exclude high grade squamous intraepithelial lesion), R85.612 — Low grade squamous intraepithelial lesion on cytologic smear of anus (LGSIL) (cytology, anus, low grade squamous intraepithelial lesion), R85.613 — High grade squamous intraepithelial lesion on cytologic smear of anus (HGSIL) (cytology, anus, high grade squamous intraepithelial lesion), +231 more

Contextual Map

Every relationship of R84.0 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

Clinical classification (CCSR)

MS-DRG Grouper

MDC crossing

  • MDC 23 — Factors Influencing Health Status and Other Contacts with Health Services[MDC crossing]: “Factors Influencing Health Status and Other Contacts with Health Services — 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. 1,235 same-MDC procedures group here; browse them on the MDC page.”— CMS MS-DRG Definitions Manual · FY2026

Index entries

  • Abnormal, abnormality, abnormalities, specimen, respiratory organs (bronchial washings) (nasal secretions) (pleural fluid) (sputum), enzyme level[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026

Nearest codes (10)

Change history

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

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 FY2026 tabular list, index and tables, effective October 1, 2025 Release, file and checksum · Publisher’s page
Claim edits Official source data
CMS Definitions of Medicare Code Edits — v43.1 (April 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 — v43 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 structured 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 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.

Labels on this page: Official source data · MedCoder structured relationship · MedCoder explanation. How to read the labels · All data sources and release dates

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. "R84.0 — Abnormal level of enzymes in specimens from respiratory organs and thorax." ICD-10-CM FY2026. https://medcoder.ai/icd10/code/r84.0-abnormal-level-of-enzymes-in-specimens-from-respiratory-organs-and-thorax

Change history

  • FY2016 — October 1, 2015
    In the code set at ICD-10-CM adoption
    Abnormal level of enzymes in specimens from respiratory organs and thorax

No changes since FY2016 — additions, deletions, description changes and billable-status changes are tracked through FY2027 (effective October 1, 2026), 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 R84.0 in its code family, with their registry titles.

View all codes in the R84 family