Summary & Overview
HCPCS G9230: Chlamydia, Gonorrhea, and Syphilis Not Screened, Reason Not Given
HCPCS Level II code G9230 documents that chlamydia, gonorrhea, and syphilis screening were not completed and no reason was provided. Nationally, this code matters because it captures gaps in preventive sexual health services and can affect quality measurement, public health surveillance, and claims-level documentation. Accurate use of G9230 helps payers and providers identify encounters where guideline-recommended STI screening was omitted without justification.
Key payers included in the analysis are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the code's clinical intent, typical sites of service, and the implications for billing and quality reporting. The publication summarizes benchmark usage patterns, common modifier interactions, and policy considerations relevant to payers and provider billing teams. It also highlights clinical context around STI screening expectations and reasons screening may be omitted.
This summary is intended for national audiences including billing professionals, compliance officers, policy analysts, and clinicians seeking a clear description of G9230, its role in documenting missed STI screenings, and the areas of documentation and reporting that commonly intersect with its use.
Billing Code Overview
HCPCS Level II code G9230 indicates that screening for chlamydia, gonorrhea, and syphilis was not performed and no reason was provided. The code documents the absence of these recommended sexually transmitted infection (STI) screenings during an encounter when such screenings would otherwise be considered.
Service Type: Preventive/Screening omission documentation
Typical Site of Service: Outpatient clinic or ambulatory care setting, including primary care offices, sexual health clinics, and other outpatient encounters where STI screening is ordinarily offered.
Clinical & Coding Specifications
Clinical Context
A patient presents to an ambulatory sexual health clinic or primary care office for routine sexual health services or symptomatic evaluation. The clinician documents that chlamydia, gonorrhea, and syphilis screening were indicated but were not performed; no reason is recorded in the chart. A typical scenario is an adult patient aged 18–35 seeking STI screening during a preventive visit, or a sexually active patient presenting with concerns about exposure; the clinician documents intent to screen but testing was not completed and no justification (for example, patient refusal, supply shortage, or clinical contraindication) is recorded. The typical site of service is an outpatient clinic or community health center; the service type is diagnostic screening not performed. Workflow steps include history and risk assessment, counseling about testing, documentation of tests ordered, and explicit recording when tests are not performed. For G9230, the entry in the medical record must reflect that chlamydia, gonorrhea, and syphilis screening were not done and no reason is provided.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | When substantially greater work or complexity was documented for the visit related to STI evaluation despite tests not performed |
23 | Unusual anesthesia | Rarely applicable; use only if general anesthesia was provided during an encounter associated with omitted testing |
52 | Reduced services | When testing or portions of the intended encounter were partially reduced or not completed |
53 | Discontinued procedure | When the screening process was started but intentionally stopped prior to completion |
54 | Surgical care only | Not typically applicable; included for completeness when only pre/post care documented |
55 | Postoperative management only | Not typically applicable for screening visits |
56 | Preoperative management only | Not typically applicable for routine STI screening |
62 | Two surgeons | Not applicable for this code except in procedural contexts |
AS | Ambulatory surgical center | Use when the encounter occurs in an ambulatory surgical center setting |
CO | Worker’s compensation | Use for claims related to workers’ compensation payor coverage |
CQ | Service furnished under a primary care exception | Use when service delivered under PCP exception for advanced practitioners |
FX | Exception to global period | Applied when an ancillary service is excluded from a global period |
FY | Left unspecified/noncovered service | Use when the service is noncovered by the payor |
QX | Certified nurse-midwife or nurse practitioner billing under supervision | Use when applicable clinical staff furnish the service |
| Taxonomy Code | Specialty | Notes |
|---|---|---|
207Q00000X | Family Medicine | Primary care clinicians commonly document STI screening orders and results |
208D00000X | Obstetrics & Gynecology | OB/GYN clinicians perform routine STI screening in reproductive-age patients |
208000000X | Internal Medicine | Internists perform preventive and symptomatic STI screening |
363L00000X | Public Health & General Preventive Medicine | Providers in public health clinics often manage community STI screening |
163W00000X | Nurse Practitioner | Advanced practice clinicians who provide testing and counseling |
Related Diagnoses
| ICD-10 Code | Description | Clinical Relevance |
|---|---|---|
Z11.3 | Encounter for screening for infections with a predominantly sexual mode of transmission | Standard code for asymptomatic STI screening visits including chlamydia, gonorrhea, syphilis |
A54.9 | Gonococcal infection, unspecified | Represents diagnosed gonorrhea when testing is positive or suspected |
A56.9 | Sexually transmitted chlamydia infection, unspecified | Represents diagnosed chlamydia when testing is positive or suspected |
A53.9 | Syphilis, unspecified | Represents diagnosed syphilis when testing is positive or suspected |
R68.83 | Chills and rigors | Possible systemic symptom prompting STI evaluation |
R19.4 | Change in bowel habit | Relevant when rectal symptoms prompt extragenital STI testing |
N76.0 | Acute vaginitis | Genitourinary symptoms that may prompt STI testing |
N34.1 | Urethritis, unspecified | Urethral symptoms that commonly prompt chlamydia/gonorrhea testing |
Related CPT Codes
| CPT Code | Description | Relationship to This Procedure |
|---|---|---|
87491 | Infectious agent detection by nucleic acid (DNA or RNA); Chlamydia trachomatis | Commonly ordered for chlamydia screening when testing is performed |
87591 | Infectious agent detection by nucleic acid (DNA or RNA); Neisseria gonorrhoeae | Commonly ordered for gonorrhea screening when testing is performed |
86592 | Treponemal antibody test for syphilis, e.g., EIA, treponemal | Commonly ordered as part of syphilis screening when testing is performed |
99000 | Handling and/or conveyance of specimens | Ancillary code used when specimens are collected and transported for STI testing |
87490 | Infectious agent antigen detection; Chlamydia trachomatis (non-amplified probe) | Alternate method for chlamydia testing when nucleic acid amplification is not used |
86780 | Antibody; Treponema pallidum (syphilis) | Alternate syphilis serology method |
If actual testing is not performed and no reason is documented, these CPT codes would not be billed; G9230 documents the absence of screening in the medical record.