2027 ICD-10-CM Diagnosis Code L85.8Other specified epidermal thickening
ICD-10-CM Codes›L00–L99›L80-L99›L85
- Billable — Valid for Submission
- Not Chronic
L85.8 is a billable ICD-10-CM diagnosis code for other specified epidermal thickening. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 606 through 607. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified skin disorders.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Acquired keratosis follicularis
- Acquired keratosis pilaris
- Arsenical keratosis
- Autoinflammation with arthritis and dyskeratosis due to NLRP1 deficiency
- Chronic eczema of foot
- Cutaneous horn
- Eruptive keratoacanthoma
- Focal acral hyperkeratosis
- Giant keratoacanthoma
- Heat-induced dermatosis
- Hereditary keratoacanthoma
- Hyperkeratotic eczema of soles
- Hypotrichosis with keratosis pilaris
- Inflammatory hyperkeratotic dermatosis
- Keratoacanthoma
- Keratoacanthoma of eyelid
- Keratoacanthoma of skin
- Keratoacanthoma of skin of wrist
- Keratosis pilaris
- Malignant neoplasm of nail apparatus
- Malignant neoplasm of soft tissue of wrist
- Multiple keratoacanthoma of skin
- Multiple minute digitate hyperkeratosis of Goldstein
- Neoplasm of skin of wrist
- Pseudoepitheliomatous hyperplasia
- Retention hyperkeratosis
- Smokers keratosis
- Solitary keratoacanthoma
- Squamous cell carcinoma of eyelid
- Squamous cell carcinoma of nail apparatus
- Squamous cell carcinoma of upper extremity
- Subungual keratoacanthoma
- Tar keratosis
- Thermal keratosis
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to L85.8: its own notes plus those printed at L85 and Chapter 12. A note printed at a category, block or chapter applies to every code under it.
Applicable To
Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.
- Cutaneous horn
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- lipomelanotic reticulosis (I89.8)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
- systemic connective tissue disorders (M30-M36)
- viral warts (B07.-)
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Cornu cutaneum L85.8
Dyskeratosis L85.8
Keratoacanthoma L85.8
arsenical L85.8
pilaris, acquired L85.8
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Keratoacanthoma
a benign, non-neoplastic, usually self-limiting epithelial lesion closely resembling squamous cell carcinoma clinically and histopathologically. it occurs in solitary, multiple, and eruptive forms. the solitary and multiple forms occur on sunlight exposed areas and are identical histologically; they affect primarily white males. the eruptive form usually involves both sexes and appears as a generalized papular eruption.
Patient EducationClinical
Skin Conditions
Your skin is your body's largest organ. It covers the entire outside of your body. There are many ways that your skin protects your body and helps keep you healthy. For example, it:
The full article covers:
- What does your skin do?
- What problems and conditions can affect your skin?
- How can I keep my skin healthy?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert L85.8 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About L85.8Overview
What is the ICD-10 code for other specified epidermal thickening?
The ICD-10-CM code for other specified epidermal thickening is L85.8 (sometimes written as L858). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is L85.8 (Other epidermal thickening) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report other specified epidermal thickening on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does L85.8 group to?
When other specified epidermal thickening is the principal diagnosis on an inpatient stay, it groups to MS-DRG 607, 606, with relative weights from 0.8772 to 1.5721 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of L85.8?
Under the General Equivalence Mappings, other specified epidermal thickening converts to ICD-9-CM 701.8 (skin hypertro/atroph NEC). The mapping is approximate, so confirm the match fits the documentation.
