ICD-10 M40.55
Billable / SpecificLordosis, unspecified, thoracolumbar region
About ICD-10-CM M40.55
ICD-10-CM code M40.55 represents Lordosis, unspecified, thoracolumbar region. This is a billable/specific code in the Musculoskeletal and Connective Tissue chapter (block M40). The 2026 edition of ICD-10-CM M40.55 became effective on October 1, 2025.
Medicare LCD Coverage for M40.55
Local Coverage Determinations (LCDs) from CMS MACs that list M40.55 as a covered diagnosis.
Showing top 10 of 295 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing M40.55.
1 Cigna
5 Medicare
CPT Codes Commonly Billed with M40.55
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 M40.55 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 |
|---|---|---|
| M40.55 | 73729 | 10000 |
| M40.55 | 73742 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To M40.55
Other codes in section M40-M43 (Deforming dorsopathies).
ICD-10 M40.55, Billing FAQ
Is ICD-10 code M40.55 billable? +
Yes, M40.55 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What ICD-9 codes does M40.55 map to? +
Per CMS GEMs, M40.55 maps to ICD-9 codes: 73729, 73742. Useful for legacy data review and historical claim analysis.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
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