2026 ICD-10-CM Diagnosis Code R75Inconclusive laboratory evidence of human immunodeficiency virus [HIV]

ICD-10-CM Codes›R00–R99›R70-R79›R75

ICD-10-CM R75
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

R75 is a billable ICD-10-CM diagnosis code for inconclusive laboratory evidence of human immunodeficiency virus [HIV]. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 814 through 816. As a symptom code, it should not be used as a principal diagnosis once a related definitive diagnosis has been established. Coders also document this condition as human immunodeficiency virus p24 antigen detected. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Abnormal findings without diagnosis.

Code Identity

ICD-10-CM Code
R75
Billable Status
Yes — Valid for Submission
Code Describes
Inconclusive laboratory evidence of human immunodeficiency virus [HIV]
Chapter
R70-R79
Abnormal findings on examination of blood, without diagnosis

Code Classification

ChapterR00–R99Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
SectionR70-R79Abnormal findings on examination of blood, without diagnosis
CategoryR75Inconclusive laboratory evidence of human immunodeficiency virus [HIV]
This CodeR75Inconclusive laboratory evidence of human immunodeficiency virus [HIV]

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Human immunodeficiency virus p24 antigen detected
  • Reactive for both human immunodeficiency virus antibodies and p24 antigen

Tabular List NotesGuidance

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

Inclusion Terms

  • Nonconclusive HIV-test finding in infants

Type 1 Excludes

  • asymptomatic human immunodeficiency virus HIV infection status Z21
  • human immunodeficiency virus HIV disease B20

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.

    • HIV
      • laboratory evidence (nonconclusive)
    • HIV
      • nonconclusive test (in infants)
    • Human
      • immunodeficiency virus (HIV) disease (infection)
        • laboratory evidence
    • Positive
      • test, human immunodeficiency virus (HIV)
    • Test, tests, testing(for)
      • HIV (human immunodeficiency virus)
        • nonconclusive (in infants)

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 R75 to ICD-9-CMHistory

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

ICD-9-CM
795.71 Nonspcf serlgc evdnc hiv
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 R75Overview

Is R75 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report inconclusive laboratory evidence of human immunodeficiency virus [HIV] on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does R75 group to?

When inconclusive laboratory evidence of human immunodeficiency virus [HIV] is the principal diagnosis on an inpatient stay, it groups to MS-DRG 814, 815, 816, with relative weights from 0.6320 to 2.1267 depending on complications. Higher weights mean higher Medicare reimbursement.

Can R75 be a principal diagnosis?

Use it with care. This is a symptom code, so once a definitive diagnosis explaining the inconclusive laboratory evidence of human immunodeficiency virus [HIV] is established, that condition takes the principal position instead.

What is the ICD-9 equivalent of R75?

Under the General Equivalence Mappings, inconclusive laboratory evidence of human immunodeficiency virus [HIV] converts to ICD-9-CM 795.71 (nonspcf serlgc evdnc hiv). 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.