2026 ICD-10-CM Diagnosis Code R94.30Abnormal result of cardiovascular function study, unspecified

ICD-10-CM Codes›R00–R99›R90-R94›R94

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

R94.30 is a billable ICD-10-CM diagnosis code for abnormal result of cardiovascular function study, unspecified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 314 through 316. 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
R94.30
Billable Status
Yes — Valid for Submission
Code Describes
Abnormal result of cardiovascular function study, unspecified
Short Description
Abnormal result of cardiovascular function study, unsp
Parent Code
R94.3
Abnormal results of cardiovascular 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 CodeR94.30Abnormal result of cardiovascular function study, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Abnormal cardiovascular function
  • Abnormal results of cardiovascular function studies
  • Capillary fragility detected by tourniquet test
  • Cardiac function test abnormal
  • Cardiac investigative finding
  • Decreased cardiac function
  • Decreased cardiac output
  • Disorder of cardiovascular system
  • Exercise test finding
  • Exercise tolerance test abnormal
  • Inadequate peripheral blood flow
  • Special cardiovascular system test abnormal
  • Waveform finding
  • Waveform transduction

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
      • function studies
        • cardiovascular

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 R94.30 to ICD-9-CMHistory

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

ICD-9-CM
794.30 Abn cardiovasc study NOS
Exact Match The mapping is direct, with no qualifiers.

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 R94.30Overview

Is R94.30 (Abnormal results of cardiovascular function studies) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report abnormal result of cardiovascular function study, unspecified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does R94.30 group to?

When abnormal result of cardiovascular function study, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 314, 315, 316, with relative weights from 0.6821 to 2.0852 depending on complications. Higher weights mean higher Medicare reimbursement.

Can R94.30 be a principal diagnosis?

Use it with care. This is a symptom code, so once a definitive diagnosis explaining the abnormal result of cardiovascular function study, unspecified is established, that condition takes the principal position instead.

What is the ICD-9 equivalent of R94.30?

Under the General Equivalence Mappings, abnormal result of cardiovascular function study, unspecified converts to ICD-9-CM 794.30 (abn cardiovasc study NOS). The mapping is a direct match.

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.