ICD-10-CM 2027 diagnosis code
L98.5Mucinosis of the skin
L98.5 is a valid, billable ICD-10-CM code for mucinosis of the skin. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.
Looking up by condition? See ICD-10 code for Mucinosis, ICD-10 code for Scleromyxedema, ICD-10 code for Reticular erythematous mucinosis.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About L98.5
L98.5 is the ICD-10-CM diagnosis code for Mucinosis of the skin. It belongs to category L98 (other disorders of skin and subcutaneous tissue, not elsewhere classified), block L80-L99 (other disorders of the skin and subcutaneous tissue) and chapter 12 (diseases of the skin and subcutaneous tissue). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.
Within L98 (other disorders of skin and subcutaneous tissue, not elsewhere classified), L98.5 is specifically for Mucinosis of the skin. Related codes cover pyogenic granuloma (L98.0), Factitial dermatitis (L98.1), febrile neutrophilic dermatosis [Sweet] (L98.2), eosinophilic cellulitis [Wells] (L98.3), Non-pressure chronic ulcer of skin, not elsewhere classified (L98.4), other infiltrative disorders of the skin and subcutaneous tissue (L98.6), excessive and redundant skin and subcutaneous tissue (L98.7), other specified disorders of the skin and subcutaneous tissue (L98.8) and 2 more.
Don't report L98.5 together with the conditions in its Excludes1 note: focal oral mucinosis (K13.79) and myxedema (E03.9).
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.
Before ICD-10, this condition was coded in ICD-9-CM as 701.8 (other specified hypertrophic and atrophic conditions of skin).
Coding notes
Notes that apply from higher levels
Instructions written at a parent level also apply to L98.5.
Broader instructions also apply from Chapter 12: Diseases of the skin and subcutaneous tissue.
Alphabetic index entries
6 entriesTerms in the official ICD-10-CM index that lead to L98.5.
MS-DRG v44.0 grouping
All DRGs →Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.
MDC 09 · Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast
ICD-9-CM equivalent
Converter →- 701.8Other specified hypertrophic and atrophic conditions of skinapproximate
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about L98.5
Is L98.5 billable?
- Yes. L98.5 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can L98.5 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict L98.5 as a principal diagnosis.
Is L98.5 a CC or MCC?
- No. L98.5 is neither a CC nor an MCC under MS-DRG v44.0.
What DRG does L98.5 group to?
- L98.5 is used in the MS-DRG v44.0 logic for MS-DRG 606 (Minor Skin Disorders with MCC) and MS-DRG 607 (Minor Skin Disorders without MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.
What is the ICD-9 code for L98.5?
- The CMS General Equivalence Mappings map L98.5 to ICD-9-CM 701.8.