Ultrasound for Pregnancy — CPB 0199 | AETNA Coverage Update

TL;DR: Aetna, a CVS Health company, modified CPB 0199 governing pregnancy ultrasound coverage, effective September 26, 2025. Billing teams need to review their medical necessity documentation and ICD-10 pairing practices for CPT 76811, 76812, and 93976 before claims hit the new criteria.

This update to the Aetna pregnancy ultrasound coverage policy tightens the documented indications required for detailed fetal anatomic exams (CPT 76811) and limited duplex scans (CPT 93976). The policy also draws a clear line on what the limited duplex scan does—and does not—cover for first-trimester bleeding. If your practice bills obstetric ultrasound for Aetna members, this is a read-now policy, not a read-later one.

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Quick-Reference Table

Field	Detail Copy
Payer	Aetna, a CVS Health company
Policy	Ultrasound for Pregnancy — CPB 0199
Policy Code	CPB 0199
Change Type	Modified
Effective Date	September 26, 2025
Impact Level	High
Specialties Affected	OB/GYN, Maternal-Fetal Medicine, Radiology, Diagnostic Ultrasound
Key Action	Audit ICD-10 pairing and volume limits for CPT 76811 before billing claims with September 26, 2025 or later dates of service

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Aetna Pregnancy Ultrasound Coverage Criteria and Medical Necessity Requirements 2025

CPB 0199 Aetna defines medical necessity for pregnancy ultrasound across three tiers: standard obstetric ultrasound, detailed fetal anatomic exams, and limited duplex scans. Each tier has its own criteria, and mixing them up is the fastest path to a claim denial.

Detailed fetal anatomic ultrasound — CPT 76811 and 76812

CPT 76811 (detailed fetal and maternal evaluation) and add-on code 76812 (each additional gestation) require documented clinical justification from a specific list of indications. General pregnancy surveillance does not qualify. The indication has to be on the list.

Covered indications include evaluation for amniotic band syndrome, single umbilical artery (SUA), and soft sonographic markers of aneuploidy. The aneuploidy markers covered under this Aetna pregnancy ultrasound coverage policy are specific: absent or hypoplastic nasal bone, choroid plexus cyst, echogenic bowel, echogenic intracardiac focus, fetal pyelectasis, increased nuchal translucency of 3.0 mm or greater in the first trimester, and shortened long bones (femur or humerus).

Beyond soft markers, CPT 76811 is covered when there are known or suspected fetal anatomic abnormalities. That includes abnormal serum marker screening (triple or quad screen — see also CPB 0464), anatomic abnormalities from genetic conditions, IVF pregnancies, pre-pregnancy obesity (BMI 30 kg/m² or more, ICD-10 E66.01 or E66.09), known or suspected Zika virus exposure (ICD-10 A92.5), pregnancies complicated by untreated or inadequately treated syphilis, and a prior pregnancy with omphalocele or other ultrasound-detectable congenital anomaly with elevated recurrence risk.

Additional covered indications for CPT 76811 include maternal bicornuate uterus or uterus didelphys, Arnold Chiari malformation type 1 in the pregnant member, maternal history of Klippel-Trenaunay syndrome, and a prior child with DiGeorge syndrome (with the detailed fetal exam at 20 weeks based on that history).

Volume limits matter here. The policy is explicit: more than one detailed fetal anatomic ultrasound in the first trimester and more than one detailed fetal anatomic ultrasound in the second trimester are not medically necessary. Bill a second CPT 76811 in the same trimester without a compelling documented reason, and you're looking at a denial.

Limited duplex scan — CPT 93976

CPT 93976 (duplex scan of arterial inflow and venous outflow, abdomen/pelvis) is covered for specific obstetric indications. These include vaginal bleeding in the second or third trimester, suspected placenta accreta spectrum (accreta, increta, percreta) on ultrasound in the second or third trimester, and suspected abruptio placenta on ultrasound in the second or third trimester.

For first-trimester ectopic pregnancy, CPT 93976 is covered when there's pain or bleeding and an adnexal mass confirmed on ultrasound. Cornual or C-section scar ectopic pregnancy suspected on ultrasound also qualifies, for vascular assessment purposes.

The policy also covers CPT 93976 for chorioangioma (ICD-10 D26.7) or umbilical cord varix to assess vascular flow, and for a list of other placental and cord abnormalities where vascular flow evaluation is clinically relevant. That list includes placental hemangioma, succenturiate placenta or accessory lobe, hypo/hyper-coiled umbilical cord, marginal cord insertion, umbilical cord cyst, and velamentous cord insertion.

Prior authorization requirements are not explicitly enumerated in this version of the policy, but complex indications and high-cost procedures like detailed anatomic exams and duplex scans frequently trigger prior auth under Aetna plans. Check the member's specific plan before scheduling. Your compliance officer can help you identify which plan types require prior authorization for CPT 76811 and 93976.

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Aetna Pregnancy Ultrasound Exclusions and Non-Covered Indications

This coverage policy has two clear non-covered designations, and both are worth building into your intake and documentation workflows.

First, ultrasounds done solely to determine fetal sex or to provide parents with a keepsake view and photograph are not medically necessary. Full stop. If that's the sole clinical purpose documented, expect a denial. The clinical documentation needs to reflect a covered indication — not a social one.

Second, CPT 93976 is explicitly not covered for assessment of threatened miscarriage in members with vaginal bleeding during the first trimester. This is a direct exclusion. If your team is billing CPT 93976 for first-trimester bleeding without a confirmed adnexal mass (for ectopic evaluation) or another covered indication, those claims will not survive Aetna review.

CPT 93975 (the complete duplex scan of abdomen/pelvis) is also listed as not covered for indications in this policy. The covered code is CPT 93976 (limited), not 93975 (complete). That distinction alone is worth a charge capture audit.

3D rendering codes CPT 76376 and 76377 are explicitly not covered under CPB 0199. If your practice offers 3D fetal imaging, do not bill those codes for Aetna obstetric patients expecting reimbursement under this policy.

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Coverage Indications at a Glance

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Aetna Pregnancy Ultrasound Billing Guidelines and Action Items 2025

Copy Action Items

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CPT, HCPCS, and ICD-10 Codes for Pregnancy Ultrasound Under CPB 0199

Covered CPT Codes (When Selection Criteria Are Met)

Code	Type	Description Copy
93976	CPT	Duplex scan of arterial inflow and venous outflow of abdominal, pelvic, scrotal contents and/or retroperitoneal organs; limited
76811	CPT	Ultrasound, pregnant uterus, real time with image documentation, fetal and maternal evaluation plus detailed fetal anatomic examination
+76812	CPT	Each additional gestation (add-on to 76811)

Not Covered / Excluded CPT Codes

Code	Type	Description	Reason Copy
76376	CPT	3D rendering with interpretation and reporting of computed tomography, magnetic resonance imaging, ultrasound, or other tomographic modality	Not covered for indications listed in CPB 0199
76377	CPT	3D rendering requiring image postprocessing on an independent workstation	Not covered for indications listed in CPB 0199
93975	CPT	Duplex scan of arterial inflow and venous outflow of abdominal, pelvic, scrotal contents and/or retroperitoneal organs; complete	Not covered for indications listed in CPB 0199

Related HCPCS Code

Code	Type	Description Copy
J1953	HCPCS	Injection, levetiracetam, 10 mg

Note: J1953 appears in the CPB 0199 code set. Its clinical connection to pregnancy ultrasound is not explained in the policy document. If you're billing J1953 in an obstetric context and flagging it against this policy, ask your compliance officer to confirm applicability before submitting.

Key ICD-10-CM Diagnosis Codes

The full ICD-10 list in CPB 0199 runs to 975 codes. The table below covers the codes with the highest billing relevance to the covered indications in this policy.

For the full ICD-10 list tied to CPB 0199, including genetic condition codes and anatomic abnormality codes supporting CPT 76811, review the complete code set at CPB 0199 on Aetna's policy portal.

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