2026 ICD-10-CM Diagnosis Code R84.7Abnormal histological findings in specimens from respiratory organs and thorax

ICD-10-CM Codes›R00–R99›R83-R89›R84

ICD-10-CM R84.7
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

R84.7 is a billable ICD-10-CM diagnosis code for abnormal histological 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
R84.7
Billable Status
Yes — Valid for Submission
Code Describes
Abnormal histological findings in specimens from respiratory organs and thorax
Short Description
Abnormal histolog 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 CodeR84.7Abnormal histological findings in specimens from respiratory organs and thorax

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Common bile duct surgical margin, involved by tumor
  • Lung surgical margin, involved by tumor
  • Lung, attached tissue surgical margin, involved by tumor
  • Lung, bronchial surgical margin, involved by tumor
  • Lung, parenchymal surgical margin, involved by tumor
  • Lung, vascular surgical margin, involved by tumor
  • Pancreatic surgical margin, involved by tumor
  • Pleura, bronchial surgical margin, involved by tumor
  • Pleura, chest wall surgical margin, involved by tumor
  • Pleura, diaphragmatic surgical margin, involved by tumor
  • Pleura, esophageal surgical margin, involved by tumor
  • Pleura, extrapleural chest wall surgical margin, involved by tumor
  • Pleura, mediastinal surgical margin, involved by tumor
  • Pleura, pericardial surgical margin, involved by tumor
  • Pleura, pulmonary vascular surgical margin, involved by tumor
  • Pleura, tracheal surgical margin, involved by tumor
  • Pleura, vertebral body surgical margin, involved by tumor
  • Pleural surgical margin, involved by tumor
  • Surgical bronchial margin involved by malignant neoplasm
  • Surgical bronchial margin involved by squamous cell carcinoma in situ
  • Surgical bronchial margin involved by tumor
  • Surgical common bile duct margin involved by in situ carcinoma
  • Surgical common bile duct margin involved by malignant neoplasm
  • Surgical pancreatic margin involved by malignant neoplasm
  • Surgical parietal pleural margin involved by malignant neoplasm
  • Surgical uncinate process margin involved by malignant neoplasm

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Abnormal, abnormality, abnormalities
      • specimen
        • respiratory organs (bronchial washings) (nasal secretions) (pleural fluid) (sputum)
          • histology

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 R84.7 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 R84.7Overview

Is R84.7 a billable code?

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

What MS-DRG does R84.7 group to?

When abnormal histological 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 R84.7 be a principal diagnosis?

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

What is the ICD-9 equivalent of R84.7?

Under the General Equivalence Mappings, abnormal histological 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.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.