76818 Antepartum testing

CPT 76818

CPT 76818: Biophysical Profile with Non-Stress TestBiophysical Profile with Non-Stress Test

The short answer

Use 76818 for a biophysical profile that includes a non-stress test: the ultrasound assessment of fetal breathing, movement, tone, and amniotic fluid plus the monitored heart rate tracing, scored together. The NST is part of the code, so do not bill 59025 separately for the same session. A BPP scored without the NST component is 76819.

Source: NCCISource: CMS MPFS 2026Source: ACOG/SMFM

When to use 76818

Report 76818 when antepartum surveillance uses the full biophysical profile: the four ultrasound components observed and scored, plus the non-stress test contributing the fifth. Typical indications are post-dates pregnancy, decreased fetal movement, growth restriction, diabetes, and hypertensive disorders. The single most common billing error on this code is adding 59025 to the claim; the NST is already inside 76818, and the pair triggers an automatic bundling edit.

When to use 76818 vs 76819

76818 · BPP with NST

All five components scored
Heart rate tracing performed and included
Do not add 59025 for the same session
Higher RVUs, full surveillance protocol

76819 · BPP without NST

Four ultrasound components only
No tracing, or tracing billed separately
Pairs with a distinct 59025 when documented
Common when the modified BPP is split

Documentation checklist

The BPP is a scored test, so the record needs the score and its inputs, not just a narrative that surveillance occurred.

✓ Surveillance indication documented, such as post-dates, growth restriction, or diabetes

✓ Fetal breathing movements observed and scored

✓ Gross body movements observed and scored

✓ Fetal tone observed and scored

✓ Amniotic fluid volume measured and scored

✓ NST tracing performed, interpreted, and included in the composite score

✓ Total score with interpretation and disposition

✓ Images and tracing stored, signed interpretation on file

Global package rules

Antepartum fetal surveillance is not part of the global obstetric package; 76818 is billed separately from 59400 on each date of service. Twice-weekly testing is standard for many indications, so serial claims are normal, but each needs the surveillance diagnosis attached. For twins, report the BPP per fetus, appending modifier 59 to additional-fetus lines with per-fetus scoring documented. NCCI

TC-26 components

As an imaging-plus-monitoring service, 76818 splits into professional and technical components. Hospitals running antepartum testing units bill the TC while the interpreting physician bills 76818-26; a practice doing both in the office bills globally.

76818

Global: one entity owns equipment and interpretation

76818-26

Professional: interpretation only

76818-TC

Technical: equipment, monitor, and staff

Reimbursement

2026 · national Medicare averages

Component	Work RVU	Total RVU	2026 rate
76818Global	1.02	3.65	$121.91
76818-26Professional	1.02	1.50	$50.10
76818-TCTechnical	0.00	2.15	$71.81

National amounts under the 2026 Medicare Physician Fee Schedule (non-facility total RVU x $33.4009 conversion factor, no locality/MAC adjustment). Commercial and Medicaid rates differ. Verify current values with your MAC before billing.

Common denials

CO-97 59025 billed with 76818

Why it happens

The NST was billed separately even though it is a component of the BPP-with-NST code.

How to fix

Remove 59025 from the claim. Bill 59025 separately only when it was a distinct service at a different session, with modifier 59 and separate documentation.

Source: NCCI

CO-151 Testing frequency exceeded

Why it happens

Serial BPP claims crossed the payer's utilization screen for the diagnosis on file.

How to fix

Confirm the surveillance diagnosis supports the interval, twice weekly is standard for several high-risk conditions, and appeal with the testing protocol and specialty guidance.

Source: ACOG/SMFM

CO-50 No surveillance indication

Why it happens

The claim lacked a diagnosis establishing why antepartum testing was medically necessary.

How to fix

Link the condition driving surveillance and make sure the report opens with it. Routine testing of a low-risk pregnancy is not covered.

Source: CMS

CO-236 76818 and 76819 on the same date

Why it happens

Both BPP codes were reported for one session.

How to fix

They are mutually exclusive for a single test. Bill 76818 if the NST was included in the score, 76819 if it was not.

Source: NCCI

CO-16 Missing or invalid TC-26 modifier

Why it happens

The hospital testing unit and the interpreting physician both billed globally, or neither appended a component modifier.

How to fix

Split the claim: 76818-26 for the interpretation, 76818-TC for the facility. Resubmit with corrected modifiers.

Source: CMS

FAQ

What is the CPT code description for 76818?

In plain language, 76818 covers the fetal biophysical profile that includes a non-stress test: ultrasound observation of fetal breathing, movement, tone, and amniotic fluid, combined with a monitored heart rate tracing into a single composite score.

Can I bill 59025 with 76818?

Not for the same session. The NST is a scored component of 76818 and bundles into it. A separate NST at a genuinely distinct session the same day requires modifier 59 and its own documentation, and expect scrutiny.

When do I use 76819 instead?

When the BPP is scored on the four ultrasound components without the NST, either because the tracing was not done or because it is being reported separately as a distinct service.

How often can a BPP be billed?

As often as the surveillance protocol requires, commonly weekly or twice weekly for high-risk indications. There is no CPT limit, but every claim needs the qualifying diagnosis, and payers audit long series.

How is a BPP billed for twins?

Score and document each fetus separately and bill per fetus, with modifier 59 on the additional-fetus lines. Payer handling varies, so confirm the preferred format before submitting twin surveillance claims.

Is the BPP part of the global OB package?

No. Antepartum fetal surveillance is separately payable from 59400 on every date of service.

CPT® is a registered trademark of the American Medical Association. Educational reference only, not billing, legal, or medical advice. Maintained by Ouma Health, a maternal-fetal telemedicine practice. Printed from obcodingguide.com, content current as of July 2026.