L05.01 — Pilonidal cyst with abscess
L05.01 is a billable, specific ICD-10-CM code for pilonidal cyst with abscess. It is valid for submission on a claim.
Excludes2 — not included here, but may coexist
The excluded condition is not part of this code, but a patient can have both. You may code both.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Pilonidal abscess
- Pilonidal dimple with abscess
- Postanal dimple with abscess
Other codes that can never be billed with L05.01
These codes carry an Excludes1 note pointing at L05.01. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading L05.01 alone.
- L02.3Cutaneous abscess, furuncle and carbuncle of buttock
Risk adjustment
L05.01 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
L05.01 is named in 2 Medicare coverage policies — 2 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A56766Billing and Coding: Incision and Drainage (I&D) of Abscess of Skin, Subcutaneous and Accessory Structures
- A58565Billing and Coding: Wound and Ulcer Care
How L05.01 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to L05.01.
- Abscess›pilonidal
- Cyst›pilonidal›with abscess
Related codes at this level
Codes that share L05.0. If L05.01 is not quite right, the correct code is usually one of these.
Questions about L05.01
- Is L05.01 a billable ICD-10-CM code?
- Yes. L05.01 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does L05.01 sit in the tabular list?
- Diseases of the skin and subcutaneous tissue (L00-L99), in the block Infections of the skin and subcutaneous tissue (L00-L08).