ICD-10 A55
Billable / SpecificChlamydial lymphogranuloma (venereum)
About ICD-10-CM A55
ICD-10-CM code A55 represents Chlamydial lymphogranuloma (venereum). This is a billable/specific code in the Infectious and Parasitic Diseases chapter (block A55). The 2026 edition of ICD-10-CM A55 became effective on October 1, 2025.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under A55. Per CMS ICD-10-CM Tabular 2026.
- Climatic or tropical bubo
- Durand-Nicolas-Favre disease
- Esthiomene
- Lymphogranuloma inguinale
Medicare LCD Coverage for A55
Local Coverage Determinations (LCDs) from CMS MACs that list A55 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 A55.
1 Cigna
2 Medicare
CPT Codes Commonly Billed with A55
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 45307 CMS LCD: Billing and Coding: Colonoscopy/Sigmoidoscopy/Proctosigmoidoscopy CMS LCD
- 45309 CMS LCD: Billing and Coding: Colonoscopy/Sigmoidoscopy/Proctosigmoidoscopy CMS LCD
- 45308 CMS LCD: Billing and Coding: Colonoscopy/Sigmoidoscopy/Proctosigmoidoscopy CMS LCD
- 45303 CMS LCD: Billing and Coding: Colonoscopy/Sigmoidoscopy/Proctosigmoidoscopy CMS LCD
- 45321 CMS LCD: Billing and Coding: Colonoscopy/Sigmoidoscopy/Proctosigmoidoscopy CMS LCD
- 45347 CMS LCD: Billing and Coding: Colonoscopy/Sigmoidoscopy/Proctosigmoidoscopy CMS LCD
- 45320 CMS LCD: Billing and Coding: Colonoscopy/Sigmoidoscopy/Proctosigmoidoscopy CMS LCD
- 0885T CMS LCD: Billing and Coding: Colonoscopy/Sigmoidoscopy/Proctosigmoidoscopy CMS LCD
- 45327 CMS LCD: Billing and Coding: Colonoscopy/Sigmoidoscopy/Proctosigmoidoscopy CMS LCD
- 45317 CMS LCD: Billing and Coding: Colonoscopy/Sigmoidoscopy/Proctosigmoidoscopy CMS LCD
Convert A55 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 |
|---|---|---|
| A55 | 0991 | 00000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To A55
Other codes in section A50-A64 (Infections with a predominantly sexual mode of transmission).
ICD-10 A55, Billing FAQ
Is ICD-10 code A55 billable? +
Yes, A55 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What other names or terms map to A55? +
ICD-10 A55 includes: Climatic or tropical bubo; Durand-Nicolas-Favre disease; Esthiomene, and 1 more clinical synonyms.
What CPT codes are commonly billed with A55? +
Procedures frequently paired with A55 include: 45307, 45309, 45308, 45303, 45321.
What ICD-9 codes does A55 map to? +
Per CMS GEMs, A55 maps to ICD-9 codes: 0991. 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 July 16, 2026.
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