2026 ICD-10-CM Diagnosis Code L56.5Disseminated superficial actinic porokeratosis (DSAP)

ICD-10-CM Codes›L00–L99›L55-L59›L56

ICD-10-CM L56.5
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

L56.5 is a billable ICD-10-CM diagnosis code for disseminated superficial actinic porokeratosis (DSAP). It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 606 through 607. Coders also document this condition as disseminated superficial actinic porokeratosis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified skin disorders.

Code Identity

ICD-10-CM Code
L56.5
Billable Status
Yes — Valid for Submission
Code Describes
Disseminated superficial actinic porokeratosis (DSAP)
Short Description
Disseminated superficial actinic porokeratosis (DSAP)
Same as the full description in the CMS dataset.
Parent Code
L56
Other acute skin changes due to ultraviolet radiation

Code Classification

ChapterL00–L99Diseases of the skin and subcutaneous tissue
SectionL55-L59Radiation-related disorders of the skin and subcutaneous tissue
CategoryL56Other acute skin changes due to ultraviolet radiation
This CodeL56.5Disseminated superficial actinic porokeratosis (DSAP)

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Disseminated superficial actinic porokeratosis
  • Porokeratosis

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • DSAP

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR SKN007
Other specified and unspecified skin disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Porokeratosis

    a heritable disorder of faulty keratinization characterized by the proliferation of abnormal clones of keratinocytes and lesions showing varying atrophic patches surrounded by an elevated, keratotic border. these keratotic lesions can progress to overt cutaneous neoplasm. several clinical variants are recognized, including porokeratosis of mibelli, linear porokeratosis, disseminated superficial actinic porokeratosis, palmoplantar porokeratosis, and punctate porokeratosis.

  • Keratinocytes

    epidermal cells which synthesize keratin and undergo characteristic changes as they move upward from the basal layers of the epidermis to the cornified (horny) layer of the skin. successive stages of differentiation of the keratinocytes forming the epidermal layers are basal cell, spinous or prickle cell, and the granular cell.

  • Keratosis Lichenoides Chronica|Keratose Lichenoide Striae|Lichen Ruber Moniliformis|Lichen Verrucosus Et Reticularis|Lichen ruber moniliformis|Lichenoid Trikeratosis|Nekam Disease|Porokeratosis Striata Lichenoides

    a rare skin disorder with brownish-purple, thick scaly papules or small nodules arranged in a linear or reticulate pattern on the trunk and limbs. many cases are associated with seborrhoeic dermatitis- or rosacea-like lesions on the face. it is distinguished from lichen planus by the absence of pruritus, a lack of response to a topical or systemic corticosteroid and the presence of focal parakeratosis in histological samples.

  • Porokeratosis

    a clonal proliferation of abnormal keratinocytes characterized by the development of localized or multiple atrophic skin patches surrounded by an annular keratotic ring called cornoid lamella.

Patient EducationClinical

Sun Exposure

Ultraviolet (UV) rays are an invisible form of radiation. They can pass through your skin and damage your skin cells. Sunburns are a sign of skin damage. Suntans aren't healthy, either. They appear after the sun's rays have already killed some cells and damaged others.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert L56.5 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
692.75 Dis sup actnc porokrtsis
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About L56.5Overview

Is L56.5 (Other acute skin changes due to ultraviolet radiation) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report disseminated superficial actinic porokeratosis (DSAP) on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does L56.5 group to?

When disseminated superficial actinic porokeratosis (DSAP) is the principal diagnosis on an inpatient stay, it groups to MS-DRG 606, 607, with relative weights from 0.9064 to 1.5132 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of L56.5?

Under the General Equivalence Mappings, disseminated superficial actinic porokeratosis (DSAP) converts to ICD-9-CM 692.75 (dis sup actnc porokrtsis). The mapping is a direct match.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.