ICD-10 O33.7
Non-Billable HeaderMaternal care for disproportion due to other fetal deformities
About ICD-10-CM O33.7
ICD-10-CM code O33.7 represents Maternal care for disproportion due to other fetal deformities. This is a non-billable header code in the Pregnancy, Childbirth, and Puerperium chapter (block O33). The 2026 edition of ICD-10-CM O33.7 became effective on October 1, 2025. Non-billable codes cannot be used as a primary or secondary diagnosis on a claim, use a more specific child code instead.
Coding Tips for O33.7
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
Most O codes require a 7th character indicating trimester (1 = first, 2 = second, 3 = third). Some require fetus identification character. Code O09 (supervision of high-risk pregnancy) is required as a secondary code when applicable.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under O33.7. Per CMS ICD-10-CM Tabular 2026.
- Maternal care for disproportion due to fetal ascites
- Maternal care for disproportion due to fetal hydrops
- Maternal care for disproportion due to fetal meningomyelocele
- Maternal care for disproportion due to fetal sacral teratoma
- Maternal care for disproportion due to fetal tumor
Type 1 Excludes
Pure excludes, these codes can never be coded together with O33.7. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- obstructed labor due to other fetal deformities (O66.3)
Coding Notes
Seven Chr Note
- One of the following 7th characters is to be assigned to code O33.7. 7th character 0 is for single gestations and multiple gestations where the fetus is unspecified. 7th characters 1 through 9 are for cases of multiple gestations to identify the fetus for which the code applies. The appropriate code from category O30, Multiple gestation, must also be assigned when assigning code O33.7 with a 7th character of 1 through 9.
Medicare LCD Coverage for O33.7
Local Coverage Determinations (LCDs) from CMS MACs that list O33.7 as a covered diagnosis.
This doesn't mean the code isn't covered, it means no MAC has issued a Local Coverage Determination naming this specific code. Coverage may still apply under National Coverage Determinations or general medical-necessity rules.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing O33.7.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but O33.7 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with O33.7
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
We don't have CPT pairings indexed for this specific code yet. Use the CPT search above to find common procedures, or check your payer's published medical policy for code-specific guidance.
Codes Adjacent To O33.7
Other codes in section O30-O48 (Maternal care related to the fetus and amniotic cavity and possible delivery problems).
ICD-10 O33.7, Billing FAQ
Is ICD-10 code O33.7 billable? +
No, O33.7 is a non-billable header code. Use a more specific child code from block O33 when submitting claims.
What other names or terms map to O33.7? +
ICD-10 O33.7 includes: Maternal care for disproportion due to fetal ascites; Maternal care for disproportion due to fetal hydrops; Maternal care for disproportion due to fetal meningomyelocele, and 2 more clinical synonyms.
What codes are Type 1 Excludes for O33.7? +
Type 1 Excludes (never code together with O33.7): obstructed labor due to other fetal deformities (O66.3)
Get the full PayerReady toolkit
Free access to CPT/ICD-10 lookup, denial appeals, fee comparator, and claim auditing with credentialing enrollment.
Start free →Run this code through our claim audit tool
Check NCCI bundling, MUE limits, and modifier logic before submission.
Try the auditor →Did this page help?
Quick signal so we know what to improve.
If you want a code reference page that doesn't exist yet, email coding@payerready.com.
Tell us what's missing or wrong: coding@payerready.com. We respond within 5 business days.
Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
Powered by 11K CPT · 98K ICD-10 · 860K MPFS rates · 4.5M NCCI edits · 9.5M NPIs. Our data methodology · About our coding team