ICD-10-CM 2027
ICD-10 code for Folliculitis
From the official ICD-10-CM alphabetic index entry “Folliculitis (superficial)”. Page updated September 29, 2026.
About coding Folliculitis
The ICD-10-CM code for Folliculitis is L73.9 (Follicular disorder, unspecified). The official index lists 7 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on L73.9.
Within L73, choose L73.9 (Follicular disorder, unspecified) only when documentation doesn't support a more specific option: acne keloid (L73.0), Pseudofolliculitis barbae (L73.1), Hidradenitis suppurativa (L73.2) and other specified follicular disorders (L73.8).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 606 (Minor Skin Disorders with MCC, relative weight 1.5728) and DRG 607 (Minor Skin Disorders without MCC, relative weight 0.8772), in MDC 09 (Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific Folliculitis codes (official index)
- abscedens et suffodiens L66.3 — Perifolliculitis capitis abscedens
- cyst N83.0 — Follicular cyst of ovary
- decalvans L66.2 — Folliculitis decalvans
- deep
- gonococcal (acute) (chronic) A54.01 — Gonococcal cystitis and urethritis, unspecified
- keloid, keloidalis L73.0 — Acne keloid
- pustular L01.02 — Bockhart's impetigo
- ulerythematosa reticulata L66.4 — Folliculitis ulerythematosa reticulata
Common questions about Folliculitis ICD-10 codes
What is the ICD-10 code for Folliculitis?
- L73.9 — Follicular disorder, unspecified. More specific codes apply when the documentation supports them: L66.3, N83.0, L66.2, A54.01 and others below.
What is the ICD-10 code for abscedens et suffodiens folliculitis?
- L66.3 — Perifolliculitis capitis abscedens.
What is the ICD-10 code for cyst folliculitis?
- N83.0 — Follicular cyst of ovary (header code; choose a more specific subcode).
What is the ICD-10 code for decalvans folliculitis?
- L66.2 — Folliculitis decalvans.
What is the ICD-10 code for gonococcal folliculitis?
- A54.01 — Gonococcal cystitis and urethritis, unspecified.
What is the ICD-10 code for pustular folliculitis?
- L01.02 — Bockhart's impetigo.
What is the ICD-10 code for ulerythematosa reticulata folliculitis?
- L66.4 — Folliculitis ulerythematosa reticulata.
Is L73.9 billable?
- Yes. L73.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can L73.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict L73.9 as a principal diagnosis.
Is L73.9 a CC or MCC?
- No. L73.9 is neither a CC nor an MCC under MS-DRG v44.0.