How to appeal a CO-97 denial?

A CO-97 (payment bundled) denial is appealed by demonstrating the services are distinct and separately billable. Include the NCCI edit that was triggered, the specific modifier (59, XS, XE, XP, or XU) that justifies separate billing, and supporting documentation.

What is the cost of a denied claim?

The average cost to rework a denied claim in 2025 is $57.23 — including staff time, appeals preparation, and delayed cash flow. Multiply that by your monthly denial volume to see the true cost of your denial rate.

How does AI improve denial management?

Our AI denial engine reads CARC/RARC codes from each EOB in real time, identifies the root cause pattern, auto-drafts a customized appeal letter, and flags claims that require peer-to-peer review — reducing manual effort by 70%.

AI-Powered

Cut Your OB/GYN Denial Rate With AI-Powered Resolution

Q: What causes most OB/GYN claim denials?

The top OB/GYN denial causes are: CO-97 (bundling of global package with separate procedures), CO-4 (incorrect modifier), CO-16 (missing information), CO-197 (missing prior authorization), and CO-22 (coordination of benefits issue).

19% of in-network claims were denied in 2025. Coding denials surged 26%. At $57.23 to rework each denial, the math is brutal — unless you have AI automation working faster than the denials come in.

Free Denial Rate Analysis →Calculate Denial Cost

HIPAA CompliantBAA AvailableSOC 2 Type IIAAPC CPC-OBAHIMAMGMA

$57.23

Avg Cost Per Denied Claim

19%

In-Network Claims Denied (2025)

26%

Surge in Coding Denials

94%

Our Appeal Success Rate

Agentic AI Denial Engine

Our AI doesn't just flag denials — it reads them, analyzes them, and drafts the appeal automatically.

🤖

Agentic Denial Prediction

Pre-submission AI scans identify claims at high risk of denial before they're sent — based on payer rules, historical patterns, and real-time NCCI edits.

🔍

Automated Root-Cause Analysis

Every denial is automatically categorized by CARC/RARC code, payer, procedure type, and root cause — no manual research required.

✉️

AI-Drafted Appeal Letters

Our AI engine generates payer-specific appeal letters in seconds, incorporating clinical documentation, applicable guidelines, and prior appeal outcomes.

📊

Real-Time Denial Dashboard

Live denial trending by payer, code, physician, and procedure — so you can see patterns emerging before they become revenue problems.

⚡

Automated CARC/RARC Analysis

Every remittance advice is parsed automatically. CARC and RARC codes are decoded, categorized, and actioned within 24 hours of receipt.

📞

Peer-to-Peer Review Coordination

When clinical peer-to-peer review is warranted, we coordinate the physician-to-physician call with the payer's medical director.

Common OB/GYN Denial Codes (CARC)

We handle every OB/GYN denial code pattern — from first denial through external appeal.

CO-97

Payment Bundled

Service is included in another service already adjudicated. Most common in global OB package conflicts and same-day E/M + procedure.

High

CO-4

Incorrect Modifier

The service was inconsistent with the modifier used. Frequent in Modifier 51 vs 59 confusion and Modifier 22 without documentation.

High

CO-22

Coordination of Benefits

This care may be covered by another payer. Triggered by mid-pregnancy insurance changes not caught before submission.

Medium

PR-96

Non-Covered Charge

Service not covered by the plan. Common with fertility treatments, elective sterilization, and cosmetic GYN procedures.

Medium

CO-11

Diagnosis Inconsistent

Diagnosis inconsistent with procedure. CPT/ICD-10 combination mismatch — e.g., wrong trimester code or non-specific diagnosis.

High

CO-16

Missing/Invalid Info

Claim lacks information or has invalid data. Missing NPI, invalid date of birth, or incomplete box entries.

Medium

CO-197

Prior Auth Missing

Precertification/authorization absent for service. Required for robotic GYN surgery, high-cost labs, and some inpatient OB stays.

Critical

CO-50

Non-Covered Service

These services are not covered. Differs from PR-96 — this denial comes from plan-level exclusions, not benefit limitations.

Medium

Our 6-Step Appeal Workflow

Denial Receipt & Triage

All denials captured from ERA/EDI within 24 hours. Auto-sorted by code, payer, dollar value, and appeal deadline.

AI Root Cause Analysis

CARC/RARC codes decoded. Pattern matched against 50,000+ historical OB/GYN denial outcomes. Root cause identified.

Appeal Letter Generation

AI drafts payer-specific appeal with clinical documentation requests, guideline citations, and precedent references.

Physician Review & Sign

Physician reviews AI-drafted appeal in portal (< 5 min). Digital signature. Automated submission tracking.

Peer-to-Peer if Needed

High-value clinical denials escalated to peer-to-peer review. We coordinate scheduling with the payer's medical director.

External Review (Final)

If internal appeal fails, we file for independent external review — final escalation before write-off consideration.

Timely Filing Limits by Payer

Payer	Timely Filing Limit	OB/GYN Notes
Medicare	365 days from date of service	Clean claim = 30-day pay
Medicaid	Varies by state (90–365 days)	Check state-specific rules
Cigna	180 days from date of service	Appeal: 180 days from denial
UnitedHealthcare	90–180 days	UHC OB-specific auth lists vary
Aetna	180 days from date of service	OB global: auth required >22 wks
BCBS	180 days (plan-dependent)	State BCBS plans vary widely

Denial Management — FAQ

What causes most OB/GYN claim denials?+

The top 5 OB/GYN denial causes in 2025: (1) CO-97 bundling of global package procedures, (2) CO-197 missing prior authorization for robotic GYN surgery, (3) CO-4 incorrect modifier usage on multi-procedure claims, (4) CO-11 CPT/ICD-10 combination mismatches, and (5) CO-16 missing or invalid claim information.

How do you appeal a CO-97 bundling denial?+

A CO-97 appeal requires proving the procedures are distinct and separately payable. We include: the specific NCCI edit triggered, the X-modifier justification (XS, XE, XP, or XU), and supporting documentation showing the procedures are clinically distinct. Our AI drafts the letter with payer-specific language.

What does it cost to work a denied OB/GYN claim?+

The 2025 industry average is $57.23 per denied claim — including staff time researching the denial, drafting the appeal, resubmitting, and managing delayed cash flow. At 8% denial rate, a $250,000/month practice loses roughly $14,400 per month just to rework costs.

How does AI denial management work?+

Our agentic AI reads every EOB remittance in real time, decodes CARC/RARC codes, matches against our OB/GYN-specific denial pattern database, selects the appropriate appeal strategy, and drafts a customized letter — all within 24 hours of denial receipt. Physicians review and sign; we handle submission.

“

Our denial rate dropped from 14% to 3.2% in four months. The AI appeal system is remarkable — it writes better appeals than our staff did manually.

Dr. Amara N.

OB/GYN, 3-Physician Group — Georgia

Revenue Cycle Management →Coding Audits →Calculate Denial Cost →

Ready to Cut Your Denial Rate to Under 5%?

Get a free denial rate analysis. We'll show you exactly where your revenue is leaking and how our AI closes the gap.

Get Free Denial Rate Analysis →