CMS Updates STI Screening and HIBC Coverage Policy (NCD 352) — What Billing Teams Need to Know

The Centers for Medicare & Medicaid Services has issued a modification to NCD 352, its national coverage determination governing screening for sexually transmitted infections and High-Intensity Behavioral Counseling (HIBC) to prevent STIs. This update affects how Medicare Part B covers chlamydia, gonorrhea, syphilis, and hepatitis B screening, as well as behavioral counseling services for qualifying patients. If your practice bills for preventive STI services under Medicare, this policy change warrants immediate review.

What CMS NCD 352 Covers: STI Screening and Behavioral Counseling Under Medicare

NCD 352 establishes national coverage for STI screening and HIBC services under Medicare Part B's Additional Preventive Services benefit category, authorized under §1861(ddd) of the Social Security Act. Coverage applies to services that are reasonable and necessary for the prevention or early detection of illness or disability, carry a grade A or B recommendation from the United States Preventive Services Task Force (USPSTF), and are appropriate for Medicare Part A or Part B beneficiaries.

CMS has determined that the evidence is adequate to support coverage for the following:

• Chlamydia screening for all sexually active non-pregnant women aged 24 and younger, and for older non-pregnant women at increased risk
• Chlamydia screening for all pregnant women aged 24 and younger, and for older pregnant women at increased risk
• Gonorrhea screening for all sexually active women, including pregnant women, who are at increased risk
• Syphilis screening for all pregnant women and for all persons at increased risk
• Hepatitis B virus (HBV) screening in pregnant women at their first prenatal visit
• HIBC for STI prevention for all sexually active adolescents and for adults at increased risk for STIs

Coverage for these services has been in effect since November 8, 2011, for claims with dates of service on or after that date. The March 2026 modification updates the policy's terms — billing teams should review the full updated document to identify any changes to eligibility criteria, frequency limits, or documentation requirements that may affect claims going forward.

Medical Necessity Criteria: Who Qualifies Under NCD 352

CMS coverage under this NCD is directly tied to USPSTF grade A and B recommendations. That means your documentation needs to support the patient's eligibility based on specific clinical and demographic criteria — not just a general order for STI testing.

For chlamydia and gonorrhea screening, increased risk for older women (age 25 and above) must be documented. Risk factors typically include new or multiple sexual partners, inconsistent condom use, prior STI history, or other clinically recognized indicators. For syphilis screening, increased risk criteria apply to all non-pregnant persons — documentation should reflect the clinical basis for that determination.

Hepatitis B screening has a defined trigger point: the first prenatal visit. Claims billed outside that context may face scrutiny. For HIBC services, the policy covers all sexually active adolescents automatically, while adults require documented increased risk for STIs.

The underlying laboratory tests must use FDA-approved or FDA-cleared methods. If your lab or reference lab is using a test that hasn't received FDA clearance for the specific indication, that's a denial risk worth addressing in advance.

HIBC for STI Prevention: What "High-Intensity" Actually Means for Billing

High-Intensity Behavioral Counseling is a specific service type — it is not the same as a brief screening conversation documented in a preventive visit note. Under USPSTF definitions and CMS coverage intent, HIBC involves structured, intensive counseling sessions focused on reducing STI risk behaviors.

This distinction matters for billing. If your clinicians are providing counseling that meets the threshold for HIBC, it needs to be documented and billed accordingly. Underdocumented HIBC services are frequently denied or downcoded because the clinical record doesn't reflect the intensity, duration, or behavioral intervention elements that justify the service.

For adolescent patients, no increased-risk documentation is required — coverage applies to all sexually active adolescents. For adults, the chart must support the increased-risk determination that triggers eligibility.

Coverage Basis: The USPSTF-CMS Link Billing Teams Must Understand

CMS coverage under §410.64 is explicitly contingent on USPSTF grade A or B recommendations. This is not incidental — it's the statutory mechanism that activates coverage. When a USPSTF recommendation changes its grade (upward or downward), it can directly affect whether CMS covers a service, which is one reason NCDs in this category get modified over time.

For billing teams, this means two things. First, the clinical indication documented in the record needs to align with the USPSTF-recommended population. Second, when you see an NCD modification like this one, it's worth checking whether the underlying USPSTF recommendations have been updated — because the NCD may be responding to a recommendation change that affects which patient populations are now in or out of coverage.

No prior authorization requirement is specified in this NCD. These services are covered preventive benefits under Part B, which means the access barrier is documentation and medical necessity — not an upfront auth process.

Affected Codes

This policy does not list specific CPT, HCPCS, or ICD-10 codes in the data provided for this version of NCD 352. CMS's published NCD may reference applicable laboratory and counseling codes; billing teams should consult the full policy document and the CMS Coverage Database directly to identify the current applicable codes for STI screening lab tests and HIBC services. Coding lookups should also cross-reference your Medicare Administrative Contractor (MAC) for any local guidance that supplements this NCD.

What Your Billing Team Should Do