Inconclusive laboratory evidence of human immunodeficiency virus [HIV]
In Abnormal findings on examination of blood, without diagnosis (R70-R79), chapter 18: Symptoms, Signs and Abnormal Clinical and Laboratory Findings
- R75 is billable and valid on claims for FY 2027. If the record has more detail, check the other codes under R70-R79 below.
- As a secondary diagnosis it is not a CC or MCC, so it doesn't raise the MS-DRG payment.
- Doesn't count toward a Medicare Advantage risk score (no HCC in V28).
- AHRQ's Chronic Condition Indicator classes it as not chronic (an acute or short-term condition).
Also indexed as: HIV, laboratory evidence; HIV, nonconclusive test; Human, immunodeficiency virus disease, laboratory evidence; Positive, test, human immunodeficiency virus; Test, HIV, nonconclusive
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Instructional notes
Also applies, from Abnormal findings on examination of blood, without diagnosis (R70-R79)
These notes sit on R70-R79 and apply to every code under it, including R75.
Excludes2: not included here, code separately if applicable
- abnormal findings on antenatal screening of mother (O28.-)
- abnormalities of lipids (E78.-)
- abnormalities of platelets and thrombocytes (D69.-)
- abnormalities of white blood cells classified elsewhere (D70-D72)
- coagulation hemorrhagic disorders (D65-D68)
- diagnostic abnormal findings classified elsewhere - see Alphabetical Index
- hemorrhagic and hematological disorders of newborn (P50-P61)
Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
- Section I.C.1.a Human Immunodeficiency Virus (HIV) Infections (page 19), covers R75
Code only confirmed HIV, where the provider's statement is enough. Assign B20 for AIDS or any HIV-related illness, Z21 for asymptomatic HIV positive status, and R75 for inconclusive serology. Once B20 applies, use it on every later encounter.
Other Chapter 18 topics:
- Use of symptom codes (page 75)
- Use of a symptom code with a definitive diagnosis code (page 75)
- Combination codes that include symptoms (page 75)
- Repeated falls (page 76)
- Coma (page 76)
- Functional quadriplegia (page 76)
- SIRS due to Non-Infectious Process (page 77)
- Death NOS (page 77)
Other codes under R70-R79
Abnormal findings on examination of blood, without diagnosis (R70-R79)
- R70Elevated erythrocyte sedimentation rate and abnormality of plasma viscosity
- R71Abnormality of red blood cells
- R73Elevated blood glucose level
- R74Abnormal serum enzyme levels
- R75Inconclusive laboratory evidence of human immunodeficiency virus [HIV](this code)
- R76Other abnormal immunological findings in serum
- R77Other abnormalities of plasma proteins
- R78Findings of drugs and other substances, not normally found in blood
- R79Other abnormal findings of blood chemistry
R75 MS-DRGs
As the principal diagnosis, R75 groups to MS-DRG 814, 815, or 816 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.
Related conditions
Grouped by AHRQ's Clinical Classifications Software Refined (CCSR), which sorts every diagnosis code into clinically meaningful categories.
R75 is in Abnormal findings without diagnosis (SYM017, its default category), with 199 codes. Others in it:
Other codes that refer to R75
Notes on these codes point to R75.
- B20 Excludes1: inconclusive serologic evidence of HIV (R75)
- P09 Excludes2: nonspecific serologic evidence of human immunodeficiency virus [HIV] (R75)
- P35-P39 Excludes2: laboratory evidence of human immunodeficiency virus [HIV] (R75)
- Z21 Excludes1: inconclusive laboratory evidence of human immunodeficiency virus [HIV] (R75)
Code history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.
ICD-9-CM equivalent
Legacy crosswalk from the CMS General Equivalence Mappings (last updated 2018).
- 795.71 Nonspecific serologic evidence of human immunodeficiency virus [HIV] (approximate)