Is ICD-10-CM code L59 billable?

No, L59 (Other disorders of skin and subcutaneous tissue related to radiation) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code L59 belong to?

L59 belongs to Chapter 12 of the ICD-10-CM tabular list: L00–L99 (Diseases of the Skin and Subcutaneous Tissue).

L59Not billable, use a more specific code below

Other disorders of skin and subcutaneous tissue related to radiation

3 billable codes under L59: none are a CC or MCC; none map to an HCC.

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Covers assigning pressure ulcer codes by site and stage, including unstageable, healing, healed, and progressing ulcers, and coding healing or progressing non-pressure chronic ulcers.

Pressure ulcer stage codes (page 58)
Non-Pressure Chronic Ulcers (page 60)

Read Section I.C.12 (page 58)

All codes under L59

L59 can't be used on a claim. Pick a billable code below; grey headings group them.

L59 MS-DRGs

As the principal diagnosis, all 3 billable codes under L59 group to MS-DRG 606 or 607 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

Other codes that refer to L59

Notes on these codes point to L59.

K13.0 Excludes1: cheilitis due to radiation-related disorders (L55-L59)
L20-L30 Excludes2: radiation-related disorders of the skin and subcutaneous tissue (L55-L59)
L23 Excludes2: radiation-related disorders of the skin and subcutaneous tissue (L55-L59)
L24 Excludes2: radiation-related disorders of the skin and subcutaneous tissue (L55-L59)
L25 Excludes2: radiation-related disorders of the skin and subcutaneous tissue (L55-L59)
T20-T32 Excludes2: radiation-related disorders of the skin and subcutaneous tissue (L55-L59)
T66 Excludes1: radiation related disorders of the skin and subcutaneous tissue (L55-L59)
T67 Excludes1: radiation-related disorders of the skin and subcutaneous tissue (L55-L59)
X32 Excludes2: radiation-related disorders of the skin and subcutaneous tissue (L55-L59)

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

Radiation Exposure

Radiation is energy. It travels in the form of energy waves or high-speed particles. Radiation can occur naturally or be man-made. There are two types:

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:

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.