2026 ICD-10-CM Diagnosis Code R94.8Abnormal results of function studies of other organs and systems

ICD-10-CM Codes›R00–R99›R90-R94›R94

ICD-10-CM R94.8
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

R94.8 is a billable ICD-10-CM diagnosis code for abnormal results of function studies of other organs and systems. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 695 through 696. 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
R94.8
Billable Status
Yes — Valid for Submission
Code Describes
Abnormal results of function studies of other organs and systems
Short Description
Abnormal results of function studies of organs and systems
Parent Code
R94
Abnormal results of function studies

Code Classification

ChapterR00–R99Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
SectionR90-R94Abnormal findings on diagnostic imaging and in function studies, without diagnosis
CategoryR94Abnormal results of function studies
This CodeR94.8Abnormal results of function studies of other organs and systems

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Basal metabolic rate - finding
  • Basal metabolic rate above reference range
  • Basal metabolic rate below reference range
  • Basal metabolic rate outside reference range
  • Cystometry outside reference range
  • Decreased amniotic fluid production
  • Decreased placental secretion of chorionic gonadotropin
  • Digestive function test abnormal
  • D-xylose absorption test abnormal
  • Fast metabolic rate
  • Finding of placental volume
  • Finding related to amniotic fluid production
  • Finding related to placental secretion of chorionic gonadotropin
  • Finger-finger test abnormal
  • Finger-finger test finding
  • Gastric function test abnormal
  • Gastrointestinal test finding
  • Heel-shin test abnormal
  • Heel-shin test finding
  • Increased amniotic fluid production
  • Increased placental secretion of chorionic gonadotropin
  • Increased resting metabolic rate
  • Joint stress test finding
  • Joint stress test positive
  • Locomotor test finding
  • Metabolic function outside reference range
  • Musculoskeletal test abnormal
  • Neurological diagnostic procedure - abnormal
  • Placental function test abnormal
  • Placental volume above reference range
  • Placental volume below reference range
  • Slow metabolic rate
  • Special GIT test abnormal
  • Special urinary test abnormal
  • Sweat test outside reference range
  • Teratogenesis
  • Urodynamic studies abnormal

Tabular List NotesGuidance

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

Inclusion Terms

  • Abnormal basal metabolic rate BMR
  • Abnormal bladder function test
  • Abnormal splenic function test

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
      • basal metabolic rate
    • Abnormal, abnormality, abnormalities
      • function studies
        • bladder
    • Abnormal, abnormality, abnormalities
      • function studies
        • pancreas
    • Abnormal, abnormality, abnormalities
      • function studies
        • placenta
    • Abnormal, abnormality, abnormalities
      • function studies
        • spleen
    • Depression(acute) (mental)
      • basal metabolic rate
    • Elevated, elevation
      • basal metabolic rate
    • Findings, abnormal, inconclusive, without diagnosis
      • function study NEC
    • Findings, abnormal, inconclusive, without diagnosis
      • function study NEC
        • bladder
    • Findings, abnormal, inconclusive, without diagnosis
      • function study NEC
        • pancreas
    • Findings, abnormal, inconclusive, without diagnosis
      • function study NEC
        • placenta
    • Findings, abnormal, inconclusive, without diagnosis
      • function study NEC
        • spleen
    • Findings, abnormal, inconclusive, without diagnosis
      • scan NEC
    • Findings, abnormal, inconclusive, without diagnosis
      • scan NEC
        • bladder
    • Findings, abnormal, inconclusive, without diagnosis
      • scan NEC
        • bone
    • Findings, abnormal, inconclusive, without diagnosis
      • scan NEC
        • pancreas
    • Findings, abnormal, inconclusive, without diagnosis
      • scan NEC
        • placental
    • Findings, abnormal, inconclusive, without diagnosis
      • scan NEC
        • spleen
    • High
      • basal metabolic rate
    • Low
      • basal metabolic rate

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

Clinical InformationClinical

  • Teratogenesis

    the formation of congenital abnormalities.

  • Congenital Abnormalities

    malformations of organs or body parts during development in utero.

Convert R94.8 to ICD-9-CMHistory

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

ICD-9-CM
794.7 Abn basal metabol study
Approximate The match is approximate rather than exact.
ICD-9-CM
794.9 Abn function study 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 R94.8Overview

Is R94.8 (Abnormal results of function studies) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report abnormal results of function studies of other organs and systems on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does R94.8 group to?

When abnormal results of function studies of other organs and systems is the principal diagnosis on an inpatient stay, it groups to MS-DRG 695, 696, with relative weights from 0.6890 to 1.1438 depending on complications. Higher weights mean higher Medicare reimbursement.

Can R94.8 be a principal diagnosis?

Use it with care. This is a symptom code, so once a definitive diagnosis explaining the abnormal results of function studies of other organs and systems is established, that condition takes the principal position instead.

What is the ICD-9 equivalent of R94.8?

Under the General Equivalence Mappings, abnormal results of function studies of other organs and systems converts to ICD-9-CM 794.7 (abn basal metabol study) and 794.9 (abn function study 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.