ICD-10-CM 2027
ICD-10 code for Tylosis
From the official ICD-10-CM alphabetic index entry “Tylosis (acquired)”. Page updated September 29, 2026.
About coding Tylosis
The ICD-10-CM code for Tylosis is L84 (Corns and callosities). The official index lists 4 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on L84.
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.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
More specific Tylosis codes (official index)
- buccalis K13.29 — Other disturbances of oral epithelium, including tongue
- linguae K13.29 — Other disturbances of oral epithelium, including tongue
- palmaris et plantaris (congenital) (inherited) Q82.8 — Other specified congenital malformations of skin
- acquired L85.1 — Acquired keratosis [keratoderma] palmaris et plantaris
Common questions about Tylosis ICD-10 codes
What is the ICD-10 code for Tylosis?
- L84 — Corns and callosities. More specific codes apply when the documentation supports them: K13.29, K13.29, Q82.8, L85.1.
What is the ICD-10 code for buccalis tylosis?
- K13.29 — Other disturbances of oral epithelium, including tongue.
What is the ICD-10 code for linguae tylosis?
- K13.29 — Other disturbances of oral epithelium, including tongue.
What is the ICD-10 code for palmaris et plantaris tylosis?
- Q82.8 — Other specified congenital malformations of skin.
Is L84 billable?
- Yes. L84 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can L84 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict L84 as a principal diagnosis.
Is L84 a CC or MCC?
- No. L84 is neither a CC nor an MCC under MS-DRG v44.0.