ICD-10 D40.12
Billable / SpecificNeoplasm of uncertain behavior of left testis
About ICD-10-CM D40.12
ICD-10-CM code D40.12 represents Neoplasm of uncertain behavior of left testis. This is a billable/specific code in the Neoplasms chapter (block D40). The 2026 edition of ICD-10-CM D40.12 became effective on October 1, 2025.
Medicare LCD Coverage for D40.12
Local Coverage Determinations (LCDs) from CMS MACs that list D40.12 as a covered diagnosis.
Showing top 10 of 116 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing D40.12.
1 Cigna
5 Medicare
1 Aetna
CPT Codes Commonly Billed with D40.12
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 D40.12 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 |
|---|---|---|
| D40.12 | 2364 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To D40.12
Other codes in section D37-D48 (Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes).
ICD-10 D40.12, Billing FAQ
Is ICD-10 code D40.12 billable? +
Yes, D40.12 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What ICD-9 codes does D40.12 map to? +
Per CMS GEMs, D40.12 maps to ICD-9 codes: 2364. 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