CPT code 76810 – Multiple gestation ultrasound billing guide

Key takeaways

CPT Code 76810 is an add-on code for each additional fetus, reported with 76805 for the first fetus and never billed alone.

Bill one unit of 76810 per additional fetus, so twins take 76805 plus one unit and triplets take 76805 plus two units.

A detailed anatomic exam pairs differently, with 76811 for the first fetus and 76812 for each additional fetus.

The ICD-10 code must reflect the fetal count, using the O30 multiple gestation series rather than a singleton code.

Medicare’s 2026 national global rate for 76810 is about $88.51 before GPCI adjustment, at the non-QP conversion factor.

CPT Code 76810: Official descriptor and definition

CPT Code 76810 is the add-on code for a complete obstetric ultrasound of each additional fetus in a multiple gestation, performed after the first trimester. Its official descriptor covers a real-time transabdominal ultrasound of the pregnant uterus with image documentation. It includes fetal and maternal evaluation after the first trimester, at 14 weeks 0 days or later, for each additional gestation. The American Medical Association (AMA) CPT Editorial Panel maintains it within the 768xx obstetric ultrasound family.

As an add-on, 76810 is never reported alone. It always appears on the same claim as 76805, the complete OB ultrasound for the single or first gestation after 14 weeks. The phrase “each additional gestation” is the operational signal: one unit of 76810 per additional fetus, not one unit per scan or per visit. Check the pairing on every multiple gestation claim, because a detailed anatomic exam uses a different add-on, 76812.

Key descriptor facts at a glance

• Code type: Add-on (must not be billed standalone)
• Gestational age scope: After the first trimester (14 weeks 0 days or later), transabdominal approach
• Required companion code: 76805 (complete OB ultrasound, first gestation) on the same date of service
• Unit logic: One unit per additional fetus beyond the first
• Imaging requirement: Real-time ultrasound with image documentation retained in the medical record

Clinical components required to support a 76810 claim

Payers and the American Institute of Ultrasound in Medicine (AIUM) expect each additional fetus billed under 76810 to have its own complete documentation. Scanning only the primary fetus completely and noting the additional fetus briefly is a common documentation shortfall that supports a denial.

For each fetus billed under 76810, the ultrasound report must document all of the following:

• Fetal number and presentation (cephalic, breech, transverse)
• Fetal cardiac activity (present/absent, heart rate)
• Placenta location and relationship to the internal os for each fetus
• Amniotic fluid volume assessment per sac
• Fetal weight estimation using biometric measurements (BPD, HC, AC, FL)
• Fetal anatomy survey appropriate to gestational age for the additional fetus
• Gestational age assessment (including dating, if applicable)

ACOG (American College of Obstetricians and Gynecologists) guidelines note that higher-order multiple gestations carry increased surveillance requirements. Payer LCDs often cite ACOG practice bulletins as the standard of care, so aligning documentation with ACOG-specified parameters strengthens the record against audit.

CPT Code 76810 vs. 76805, 76811, 76815, and 76816: Choosing the right code

The 768xx OB ultrasound family is where most coding errors originate. 76810 vs 76811 is the highest-confusion pairing, but mixing up 76815 (limited) and 76816 (follow-up) with 76810 (add-on) causes denials too. The table below maps each code to its clinical scenario.

Critical rule: CPT Code 76810 and 76812 are both add-on codes, and each has one primary code. 76810 pairs with 76805, the complete scan after 14 weeks. 76812 pairs with 76811, the detailed fetal anatomic exam. Reporting 76810 under 76811 is a pairing error that payers deny. Check the AAPC CPT code reference for the current annual descriptor before each coding year.

Is CPT Code 76810 billed per fetus or per encounter?

CPT Code 76810 is billed per additional fetus, not per encounter. One unit covers one additional fetus. The number of units on the claim line must match the number of fetuses beyond the first.

• Singleton pregnancy: 76805 only (or 76811 for a detailed anatomic exam). Do not add 76810.
• Twin pregnancy: 76805 x 1 unit + 76810 x 1 unit
• Triplet pregnancy: 76805 x 1 unit + 76810 x 2 units
• Quadruplet pregnancy: 76805 x 1 unit + 76810 x 3 units

A detailed anatomic exam of twins follows the same unit logic with its own pair. It is reported as 76811 plus one unit of 76812. The diagram below sets the two pairs side by side.

On the CMS-1500 claim form, enter 76810 on its own line with the unit count in Box 24G. Each unit must correspond to a fully documented fetus in the ultrasound report. Payers that apply frequency limitations may cap the total number of complete OB ultrasounds per pregnancy. Confirm the payer’s specific policy before billing multiple units on a single date.

Modifiers for CPT Code 76810: When to use 26 and TC

Modifier selection for CPT Code 76810 follows standard diagnostic imaging rules. The choice turns on who owns the equipment and who interprets the scan.

Global OB package note: Antepartum ultrasound is not part of the global obstetric package billed under 59400, 59510, 59610 or 59618. So 76810 is billed separately with 76805, even when the delivering practice performs the scan. A few commercial contracts handle OB imaging differently, so confirm the payer’s policy. CMS updates its NCCI edit tables quarterly, so check them before assuming a code pair is always payable or always bundled.

ICD-10 diagnosis codes that support CPT Code 76810

The ICD-10 code on a 76810 claim must reflect the number of fetuses. Billing 76810 with a singleton pregnancy code (such as Z34.x or O09.x for a single gestation) commonly leads to medical necessity denials. The payer sees no clinical rationale for a multiple gestation add-on when the diagnosis says one fetus.

• O30.001-O30.093: Twin pregnancy (unspecified number of placenta and amniotic sacs, by trimester)
• O30.101-O30.133: Triplet pregnancy (with monochorionic/dichorionic variants, by trimester)
• O30.201-O30.233: Quadruplet pregnancy (with variants, by trimester)
• O30.801-O30.833: Other specified multiple gestation (5+ fetuses, by trimester)
• O30.90-O30.93: Multiple gestation, unspecified (use only when chorionicity cannot be documented)

Select the most specific code available, including trimester (first, second, third) and, where known, chorionicity (monoamniotic, monochorionic, dichorionic). The ICD-10 trimester designator on the O30 code should align with the gestational age documented in the ultrasound report. Mismatches between the trimester in the diagnosis code and the gestational age in the sonography report are a secondary audit risk. For related fertility procedure CPT codes that often precede multiple gestation pregnancies, confirm that the diagnosis code trail is consistent from the originating encounter forward.

Medicare reimbursement rates for CPT Code 76810

Medicare sets reimbursement for CPT Code 76810 each year through the Medicare Physician Fee Schedule (MPFS). It varies by location through Geographic Practice Cost Indices (GPCIs). The figures below are national amounts before GPCI adjustment, so payment in any given locality will differ.

These figures multiply the total RVUs in the 2026 CMS physician fee schedule RVU file by the $33.4009 non-QP conversion factor. Clinicians paid at the QP conversion factor of $33.5675 receive slightly more. CMS updates the rates each January. Verify current payment through the CMS Physician Fee Schedule lookup tool with your Medicare Administrative Contractor (MAC) locality code. Commercial payer rates for CPT Code 76810 vary widely and are typically negotiated as a percentage of Medicare or set by contract.

Documentation requirements for CPT Code 76810 claims

Strong documentation is the primary defense against retrospective audit of a 76810 claim. The ultrasound report must stand on its own as evidence of a complete scan of the additional fetus, with each clinical component assessed and recorded.

Required documentation elements for each additional fetus billed under 76810 include:

• Date of service and patient demographics
• Ordering provider name and NPI
• Performing sonographer name and credential (RDMS or equivalent)
• Clinical indication for the scan (referencing the multiple gestation diagnosis)
• Gestational age at time of scan, calculated from last menstrual period or confirmed by prior dating ultrasound
• All required clinical components documented per fetus (fetal number, presentation, cardiac activity, placenta, fluid, biometry, anatomy survey)
• Measurements recorded with values (BPD in mm, HC in mm, AC in mm, FL in mm) to support fetal weight estimation
• Image documentation retained per state law and payer retention policy
• Final signed report by the interpreting physician, with date and time

Payers conducting post-payment audits request the complete signed ultrasound report, not just the billing record. A report that details the primary fetus but only notes “additional fetus also visualized” cannot support a separate 76810 charge. A documented medical billing compliance process keeps the order, the report and the claim tied to the same date of service. Our guide to clean claim submission covers the documentation checklist to run before each claim goes out.

Common denial reasons for CPT Code 76810 and how to appeal

Most denials on CPT Code 76810 claims are preventable. The patterns below are the common ones in OB/GYN billing, along with the standard appeal approach for each.

A pre-submission check can flag 76810 claims that lack 76805 or an O30 ICD-10 code. It catches the two most preventable denial patterns before the claim reaches the payer. Structured denial management workflows that track CARC codes by procedure code help OB/GYN practices fix recurring patterns at charge entry. Our guide to medical billing denial codes explains each CARC in the table and the usual fix.

How claims management software keeps 76810 claims on track

Many OB/GYN practices key the 76805 and 76810 lines into a billing system that sits apart from the ultrasound report. With the report and the claim in different places, a missing unit or a singleton diagnosis can reach the payer unnoticed.

Pabau, the practice management platform we build, keeps the signed scan report, the diagnosis and the invoice on one patient record. Its claims management software submits the claim to the clearinghouse through Claim.MD, then tracks its status until payment or denial.

Your coders still choose the codes and the units. The difference is that the record and the claim sit side by side. A denied 76810 line then traces straight back to the report that supports it.

Submit and track OB ultrasound claims in one place

Pabau keeps the ultrasound report, diagnosis and invoice on one patient record, then submits the claim through Claim.MD and tracks it to payment. Your team sees the status of every 76810 claim without switching systems.

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Conclusion

CPT Code 76810 rewards a simple habit: count the fetuses in the report before you count the units on the claim. When the report, the O30 code and the 76810 units agree, a payer has little left to question.

The trade-off sits in the detailed scan. A practice that performs anatomic exams on twins switches the whole pair to 76811 and 76812, rather than adding 76810 to a detailed exam.

Book a demo to see how Pabau keeps OB ultrasound reports and claims on one record, so your team can follow each claim to payment.

Continue your research

Need a clearinghouse that handles OB/GYN claims? Pabau’s Claim.MD clearinghouse guide explains how the integration handles 837P electronic submissions and claim status tracking for US practices.

Building a denial prevention workflow? Denial codes in medical billing covers the CARC and RARC codes most commonly returned on OB ultrasound denials, with recommended responses for each.

Want to understand what clean claims look like? Medical billing workflow overview walks through the full claim lifecycle from charge entry to payment posting, including where 76810 errors typically surface.

Billing a detailed anatomic exam instead? CPT code 76811 covers the detailed fetal anatomic exam and its 76812 add-on for each additional fetus.

Coding a repeat scan of a known finding? CPT code 76816 explains the follow-up obstetric ultrasound and what it re-measures.

Frequently asked questions