CPT 76816Radiology

Ob us follow-up per fetus

CPT 76816 covers a follow-up ultrasound examination during pregnancy to check on the baby's growth and development after an initial comprehensive ultrasound has already been performed. This is a focused exam that monitors specific findings or concerns identified in earlier imaging.

Showing rates for

National Average

Base Medicare rate

$105.13

This calculator gives a typical-case estimate using standard Medicare modifier rules. Actual payment depends on payer policies, documentation, code-specific CMS status indicators, and locality. Verify before billing.

RVU breakdown

Work RVU

0.85

PE RVU (NF)

2.37

MP RVU

0.03

Total RVU

3.25

Conversion factor: 32.3465 · Source: CMS MPFS RVU25A · Confidence: High

NCCI bundling edits

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Billing tips

Bill per fetus in multiple gestations: For twins, bill 76816 x 2 units; for triplets, bill x 3 units
Impact: Doubles or triples reimbursement in multiple pregnancies - $210.26 for twins, $315.39 for triplets; commonly missed revenue opportunity
Document the specific clinical indication for follow-up and reference the date of the prior comprehensive ultrasound (76805, 76811, or 76815)
Impact: Reduces denial rate by 60-70%; medical necessity is the top reason for 76816 denials
Ensure permanent images are stored and report includes comparison to prior examination findings with interval changes noted
Impact: Critical for audit defense; lack of comparative documentation can result in full recoupment of $105.13 plus potential overpayment review
Verify appropriate time interval between comprehensive and follow-up exams; most payers expect minimum 2-3 week interval unless acute indication documented
Impact: Prevents denial when performed too soon after initial exam; can avoid 100% claim rejection
Use separate encounter for follow-up ultrasound rather than bundling with routine prenatal visit to maintain distinct documentation
Impact: Ensures clear audit trail and supports medical necessity; improves clean claim rate by 30-40%
For growth assessment follow-ups, document all required biometric measurements (BPD, HC, AC, FL) and estimated fetal weight calculation
Impact: Meets CPT descriptor requirements; incomplete measurements can downgrade to limited exam code 76815 with $30-40 payment reduction

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Frequently asked questions

What is the difference between CPT 76816 and 76805 for obstetric ultrasound?

CPT 76805 is a complete or comprehensive first-trimester ultrasound that includes evaluation of all fetal anatomy and maternal structures. CPT 76816 is a follow-up examination performed after an initial comprehensive study, focusing on specific findings or monitoring interval changes. The follow-up exam (76816) is less extensive and must reference a prior comprehensive study to justify medical necessity.

How much does Medicare pay for CPT 76816 in 2025?

Medicare pays $105.13 for CPT 76816 in 2025 based on the national average non-facility rate. This amount is the same for both facility and non-facility settings. The code has 3.25 total RVUs (0.85 work RVU, 2.37 practice expense RVU, 0.03 malpractice RVU) multiplied by the 2025 conversion factor of 32.3465.

Can you bill CPT 76816 for twins or multiple pregnancies?

Yes, CPT 76816 should be billed per fetus according to the code descriptor. For twins, bill 76816 with 2 units; for triplets, bill 3 units, and so on. Each fetus must be individually evaluated and documented with separate measurements and findings. This is a commonly missed billing opportunity that can double or triple appropriate reimbursement.

What diagnosis codes support medical necessity for CPT 76816?

Common supporting ICD-10 codes include Z36 (encounter for antenatal screening), Z34.xx (supervision of normal pregnancy), O36.5xx (maternal care for poor fetal growth), O36.8xx (maternal care for other specified fetal problems), O35.xx (maternal care for known or suspected fetal abnormality), and O40-O41 codes for amniotic fluid disorders. The diagnosis should reflect the specific clinical indication for follow-up imaging.

How often can you bill CPT 76816 during a pregnancy?

There is no absolute limit, but medical necessity must be documented for each follow-up examination. Most payers expect at least 2-3 weeks between exams unless acute clinical changes warrant more frequent imaging. Serial growth assessments are typically performed every 3-4 weeks. Frequency should be based on specific maternal or fetal conditions requiring monitoring, not routine screening.

Is CPT 76816 included in the global OB package?

No, CPT 76816 is not included in the global obstetric care package (CPT 59400, 59510, 59610, 59618). Diagnostic ultrasound examinations, including follow-up studies, are separately billable services when medically indicated. However, clear documentation of medical necessity separate from routine prenatal care is essential to support separate payment.

What is the difference between CPT 76816 and 76815?

CPT 76815 is a limited obstetric ultrasound examining specific anatomy or assessing a specific question (like placental location or fetal presentation), while 76816 is specifically a follow-up examination monitoring findings from a prior comprehensive study. The key distinction is that 76816 requires a previous comprehensive exam and documents interval changes, whereas 76815 is a problem-focused exam that may be performed without a prior comprehensive study.