2026 ICD-10-CM Diagnosis Code R84.8Other abnormal findings in specimens from respiratory organs and thorax

ICD-10-CM Codes›R00–R99›R83-R89›R84

ICD-10-CM R84.8
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

R84.8 is a billable ICD-10-CM diagnosis code for other abnormal findings in specimens from respiratory organs and thorax. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 947 through 948. As a symptom code, it should not be used as a principal diagnosis once a related definitive diagnosis has been established. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Abnormal findings without diagnosis.

Code Identity

ICD-10-CM Code
R84.8
Billable Status
Yes — Valid for Submission
Code Describes
Other abnormal findings in specimens from respiratory organs and thorax
Short Description
Oth abnormal findings in specimens from resp org/thrx
Parent Code
R84
Abnormal findings in specimens from respiratory organs and thorax

Code Classification

ChapterR00–R99Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
SectionR83-R89Abnormal findings on examination of other body fluids, substances and tissues, without diagnosis
CategoryR84Abnormal findings in specimens from respiratory organs and thorax
This CodeR84.8Other abnormal findings in specimens from respiratory organs and thorax

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Pleural fluid albumin above reference range
  • Pleural fluid appearance - finding
  • Pleural fluid bloodstained
  • Pleural fluid cloudy
  • Pleural fluid protein above reference range
  • Pleural fluid protein content - finding
  • Pleural fluid purulent
  • Pleural fluid specific gravity - finding
  • Pleural fluid turbid
  • Specific gravity - finding
  • Specific gravity above reference range
  • Specific gravity in pleural fluid above reference range

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Abnormal chromosomal findings in specimens from respiratory organs and thorax

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR SYM017
Abnormal findings without diagnosis
Default principal diagnosis: inpatient Yes · outpatient Yes

Convert R84.8 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
792.9 Abn find-body subst NEC
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About R84.8Overview

Is R84.8 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report other abnormal findings in specimens from respiratory organs and thorax on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does R84.8 group to?

When other abnormal findings in specimens from respiratory organs and thorax is the principal diagnosis on an inpatient stay, it groups to MS-DRG 947, 948, with relative weights from 0.8005 to 1.2694 depending on complications. Higher weights mean higher Medicare reimbursement.

Can R84.8 be a principal diagnosis?

Use it with care. This is a symptom code, so once a definitive diagnosis explaining the other abnormal findings in specimens from respiratory organs and thorax is established, that condition takes the principal position instead.

What is the ICD-9 equivalent of R84.8?

Under the General Equivalence Mappings, other abnormal findings in specimens from respiratory organs and thorax converts to ICD-9-CM 792.9 (abn find-body subst NEC). The mapping is approximate, so confirm the match fits the documentation.