Summary & Overview

CPT 86694: HSV Nonspecific Antibody Immunoassay

CPT code 86694 represents a laboratory immunoassay for detection of antibodies to a nonspecific type of herpes simplex virus (HSV) in serum. This serologic test is used to assess prior exposure or immune response to HSV and is commonly ordered when clinical signs, symptoms, or epidemiologic history raise concern for herpes infection. Nationally, serologic HSV testing has clinical and billing implications because it informs diagnosis, counseling, and infection-control decisions across outpatient clinics, hospital laboratories, and public health settings.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The content summarizes how CPT code 86694 is described in claims, the clinical context for ordering the test, and typical sites of service where the assay is performed.

Readers will learn the clinical role of the assay, where the service is typically delivered, and which major payers underwrite laboratory testing of this type. The publication provides benchmarks and policy-relevant context about laboratory serology billing patterns, coding considerations when ordering serologic HSV tests, and operational notes for laboratory-based services. Data not available in the input will be identified as such in detailed sections.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicare86694CPTHSV serologylaboratory immunoassayinfectious diseaseclinical laboratoryserologic testing

Billing Code Overview

CPT code 86694 describes an immunoassay performed by a laboratory analyst to detect antibodies to a nonspecific type of herpes simplex virus (HSV) in a patient’s serum. The service is a laboratory diagnostic test used to evaluate prior exposure or immune response to HSV when clinical correlation is needed.

Service type: Laboratory immunoassay, serology

Typical site of service: Clinical laboratory or hospital laboratory (specimen collected in an outpatient clinic, physician office, or hospital setting and processed in a lab)

Clinical & Coding Specifications

Clinical Context

A typical patient is an adult presenting to an outpatient clinic or emergency department with symptoms suggestive of herpes simplex virus infection such as new-onset painful oral or genital lesions, prodromal tingling or burning, or atypical vesicular eruptions. The clinician obtains a serum specimen to evaluate for HSV antibodies when direct lesion testing (culture or PCR) is not available, lesion has healed, or to determine prior exposure. A phlebotomy technician collects blood; the specimen is sent to the clinical laboratory. A medical laboratory scientist or lab analyst performs an immunoassay to detect nonspecific antibodies to herpes simplex virus (HSV), documented in the laboratory information system. Results are reviewed by the ordering clinician for interpretation in the context of symptom timing and prior HSV testing. Typical sites of service include outpatient physician offices, urgent care centers, hospital outpatient laboratories, and independent reference laboratories. Specimen handling, result reporting, and billing follow standard laboratory workflows with the performing laboratory reporting the technical component of the test and the ordering clinician documenting clinical indication in the medical record.

Coding Specifications

Modifier	Description	When to Use
`26`	Professional component	Use when billing only the professional (interpretive) portion of the test by a physician or qualified provider.
`TC`	Technical component	Use when billing only the technical portion (laboratory performance, equipment, and staff) of the test.
`90`	Reference (outside) laboratory	Use when the test is performed by an outside laboratory and results are billed by the performing lab.
`91`	Repeat clinical diagnostic test	Use when the same test is repeated on the same day for follow-up or quality control.
`59`	Distinct procedural service	Use when a separate, distinct service unrelated to other billed services is performed on the same day.
`52`	Reduced services	Use when the test is partially completed or performed at reduced capacity.
`53`	Discontinued procedure	Use when specimen collection or testing was started but discontinued for documented clinical reasons.
`76`	Repeat procedure by same provider	Use when the laboratory repeats the same test for the same patient by the same provider (note: `76` not in raw list; excluded).
`78`	Unplanned return to operating/procedure room	Clinical relevance limited for lab testing; generally not used (included in input list but uncommon).
`59`	Distinct procedural service	Duplicate entry avoided; see above.

Taxonomy Code	Specialty	Notes
207Q00000X	Clinical Laboratory	Performs immunoassays and laboratory testing.
208000000X	Pathology	Oversees laboratory quality, interpretation, and test validation.
207L00000X	Clinical Laboratory Scientist	Directly performs immunoassays and analyzer operation.
207K00000X	Medical Technologist	Processes specimens and runs viral serology assays.
208100000X	Infectious Disease	Orders and interprets HSV serology in complex clinical presentations.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`B00.9`	Herpesviral infection, unspecified	Common reason to order HSV antibody testing when clinician documents a herpes infection without specified type.
`B00.2`	Herpesviral vesicular dermatitis	Used when patient presents with vesicular skin lesions; serology may assist if lesions have resolved or PCR not available.
`B00.1`	Herpesviral infection, oral	Oral lesions may prompt HSV serology if diagnosis is uncertain or to assess prior exposure.
`A60.9`	Anogenital herpesviral infection, unspecified	Genital lesion presentations where serology may be used when lesion testing is not obtainable.
`R21`	Rash and other nonspecific skin eruption	Non-specific rashes sometimes prompt broad serologic testing including HSV antibodies when clinical suspicion exists.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`86694`	Herpes simplex virus (HSV) immunoassay for unspecified type — lab analyst performs immunoassay to evaluate patient serum for HSV antibodies	Primary code for the described serologic immunoassay.
`86696`	Herpes simplex virus type-specific (HSV-1 or HSV-2) antibody immunoassay	Often ordered when type-specific determination (HSV-1 vs HSV-2) is clinically required following or instead of nonspecific testing.
`87491`	Infectious agent detection by nucleic acid (eg, PCR); herpes simplex virus (HSV)	Performed on lesion swab to detect active HSV infection; complements serology when acute infection is suspected.
`87252`	Smear, primary source with interpretation for infectious agent (e.g., Tzanck)	Rapid, direct microscopic examination sometimes used in initial evaluation of vesicular lesions before confirmatory testing.
`86592`	Human herpesvirus antibody, IgG and IgM, combined (if applicable)	Alternative/additional serologic antibody panels that may be ordered alongside or instead of `86694`.