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ICD-10-CM 2027 diagnosis code

L03.01Cellulitis of finger

Not billable — use a more specific code

L03.01 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it.

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 L03.01

L03.01 is the ICD-10-CM diagnosis code for cellulitis of finger. It belongs to category L03 (cellulitis and acute lymphangitis), block L00-L08 (infections of the skin and subcutaneous tissue) and chapter 12 (diseases of the skin and subcutaneous tissue). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within L03.0 (cellulitis and acute lymphangitis of finger and toe), L03.01 is specifically for cellulitis of finger. Related codes cover acute lymphangitis of finger (L03.02), cellulitis of toe (L03.03) and acute lymphangitis of toe (L03.04).

To report this condition, pick the subcode that matches the documentation: L03.011 (finger), L03.012 (finger) and L03.019 (finger).

Don't report L03.01 together with the conditions in its Excludes1 note: herpetic whitlow (B00.89).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under L03.01

Coding notes

Applicable toConditions and synonyms classified to this code
  • Felon
  • Whitlow
Excludes1Not coded here — never report together with this code

Notes that apply from higher levels

Instructions written at a parent level also apply to L03.01.

› From L03 Cellulitis and acute lymphangitis
Excludes2
  • cellulitis of anal and rectal region (K61.-)
  • cellulitis of external auditory canal (H60.1)
  • cellulitis of eyelid (H00.0)
  • cellulitis of female external genital organs (N76.4)
  • cellulitis of lacrimal apparatus (H04.3)
  • cellulitis of male external genital organs (N48.2, N49.-)
  • cellulitis of mouth (K12.2)
  • cellulitis of nose (J34.0)
  • eosinophilic cellulitis [Wells] (L98.3)
  • febrile neutrophilic dermatosis [Sweet] (L98.2)
  • lymphangitis (chronic) (subacute) (I89.1)

Broader instructions also apply from L00-L08 Infections of the skin and subcutaneous tissue and Chapter 12: Diseases of the skin and subcutaneous tissue.

Alphabetic index entries

3 entries

Terms in the official ICD-10-CM index that lead to L03.01.

Codes whose notes reference L03.01

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about L03.01

Is L03.01 billable?

No. L03.01 is a header code. Report one of its more specific subcodes instead.