ICD-10 D49.9
Billable / SpecificNeoplasm of unspecified behavior of unspecified site
About ICD-10-CM D49.9
ICD-10-CM code D49.9 represents Neoplasm of unspecified behavior of unspecified site. This is a billable/specific code in the Neoplasms chapter (block D49). The 2026 edition of ICD-10-CM D49.9 became effective on October 1, 2025.
Medicare LCD Coverage for D49.9
Local Coverage Determinations (LCDs) from CMS MACs that list D49.9 as a covered diagnosis.
Showing top 10 of 98 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing D49.9.
1 Cigna
5 Medicare
2 Aetna
CPT Codes Commonly Billed with D49.9
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 D49.9 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 |
|---|---|---|
| D49.9 | 2399 | 00000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To D49.9
Other codes in section D49 (Neoplasms of unspecified behavior).
ICD-10 D49.9, Billing FAQ
Is ICD-10 code D49.9 billable? +
Yes, D49.9 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What ICD-9 codes does D49.9 map to? +
Per CMS GEMs, D49.9 maps to ICD-9 codes: 2399. 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 June 1, 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