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ICD-10-CM L88: Pyoderma gangrenosum

L88 is the billable ICD-10-CM code for pyoderma gangrenosum, in category L88 (Pyoderma gangrenosum) of the Other disorders of the skin and subcutaneous tissue section. As a principal diagnosis it groups to MS-DRG 602 Cellulitis with MCC, MS-DRG 603 Cellulitis without MCC (MDC 09 MDC 09: Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast). It maps to HCC 387 (Pemphigus, Pemphigoid, and Other Specified Autoimmune Skin Disorders) in CMS-HCC V28. As a secondary diagnosis it is a CC, excluded with 3 principal diagnoses. 4 LCD billing and coding articles list it as covered.

Compiled from CMS files by the QuickIntell RCM Editorial Team · Data effective · Method: reference methodology · Report a data correction

Data currency: ICD-10-CM code descriptions: FY2027 (effective October 1, 2026); IPPS Table 5 (MS-DRG weights): v44 FY2027 (final rule + CN3) (effective October 1, 2026); ICD-10-CM to HCC mapping: PY2027 initial ICD-10-CM mappings (dates of service 2026) (payment year 2027); Medicare Coverage Database billing and coding articles: MCD release October 8, 2026 (effective October 4, 2026). Next CMS release: FY2028 code files, effective October 1, 2027 for the ICD-10-CM code descriptions; FY2028 final rule (August 2027), effective October 1, 2027; an April 1 interim grouper update when CMS issues one for the IPPS Table 5 (MS-DRG weights); PY2028 advance notice (February 2027) and the PY2027 midyear final mapping (spring 2027) for the ICD-10-CM to HCC mapping; weekly, every Thursday for the Medicare Coverage Database billing and coding articles.

Code
L88
billable FY2027 ICD-10-CM code
Category
L88 Pyoderma gangrenosum
Chapter
12: Diseases of the skin and subcutaneous tissue (L00-L99)
CC/MCC (MS-DRG v44)
CC
CMS-HCC V28
HCC 387
POA reporting
Required

Tabular list notes for L88

Inclusion terms
  • Phagedenic pyoderma
Excludes1 (never coded together)
  • dermatitis gangrenosa (L08.0)

MS-DRG grouping when L88 is the principal diagnosis

MS-DRG v44 groups for L88 as principal diagnosis
MDCMS-DRGs
09 MDC 09: Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast602603

The final group also depends on procedures, secondary diagnoses and discharge status; the MS-DRG lookup for L88 shows the full grouping logic.

CC/MCC status and inpatient edits

As a secondary diagnosis, L88 is a CC under MS-DRG v44, unless the principal diagnosis is one of the 3 codes in its exclusion list. Check L88 against a principal diagnosis.

  • Present on admission: a POA indicator is required on inpatient claims.

CMS-HCC V28 risk adjustment

In the PY2027 mapping, L88 maps to HCC 387 (Pemphigus, Pemphigoid, and Other Specified Autoimmune Skin Disorders). The HCC lookup shows the RAF weight and the hierarchy.

LCD billing and coding articles that list L88

4 current Medicare billing and coding articles list L88 among the diagnoses that support medical necessity for the services they cover.

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Frequently asked questions

What does ICD-10-CM L88 mean?

L88 means pyoderma gangrenosum. The tabular list also files these terms under it: Phagedenic pyoderma. It is one of 1 billable codes under L88, pyoderma gangrenosum.

What can't be coded with L88?

Excludes1 at L88: dermatitis gangrenosa (L08.0). These are never reported together with L88.

Which MS-DRG does L88 group to?

As the principal diagnosis, L88 groups to MS-DRG 602 Cellulitis with MCC, MS-DRG 603 Cellulitis without MCC (MDC 09 MDC 09: Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast) under MS-DRG v44, before procedures and secondary diagnoses are applied.

Does L88 map to an HCC?

Yes: HCC 387, Pemphigus, Pemphigoid, and Other Specified Autoimmune Skin Disorders, in the PY2027 CMS-HCC V28 mapping.

Is L88 a CC or MCC?

L88 is a CC under MS-DRG v44; 3 principal diagnoses exclude it.

Sources

Every figure on this page is taken from the CMS publications below, as released by the Centers for Medicare & Medicaid Services. Projection built 2026-10-10. Verify against the primary file before billing or contracting decisions. The reference methodology explains how each figure is computed from these files.

Disclaimer

The descriptor and notes are reproduced from the FY2027 ICD-10-CM files; MS-DRG, CC/MCC and HCC facts come from the CMS FY2027 and PY2027 tables. Code from the medical record and the ICD-10-CM Official Guidelines. Not legal, clinical or billing advice.

Found a figure that does not match the CMS file? Report a data correction with the CMS file and the value you expected; the request reaches the editorial team through the contact form.