ICD-10 O99.513
Billable / SpecificDiseases of the respiratory system complicating pregnancy, third trimester
About ICD-10-CM O99.513
ICD-10-CM code O99.513 represents Diseases of the respiratory system complicating pregnancy, third trimester. This is a billable/specific code in the Pregnancy, Childbirth, and Puerperium chapter (block O99). The 2026 edition of ICD-10-CM O99.513 became effective on October 1, 2025.
Coding Tips for O99.513
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.
Medicare LCD Coverage for O99.513
Local Coverage Determinations (LCDs) from CMS MACs that list O99.513 as a covered diagnosis.
Showing top 1. Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing O99.513.
1 Medicare
CPT Codes Commonly Billed with O99.513
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.
Convert O99.513 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| O99.513 | 64891 | 10000 |
| O99.513 | 64893 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To O99.513
Other codes in section O94-O9A (Other obstetric conditions, not elsewhere classified).
ICD-10 O99.513, Billing FAQ
Is ICD-10 code O99.513 billable? +
Yes, O99.513 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What ICD-9 codes does O99.513 map to? +
Per CMS GEMs, O99.513 maps to ICD-9 codes: 64891, 64893. Useful for legacy data review and historical claim analysis.
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