Alphabetic Index FY2027

L27.8

Dermatitis due to other substances taken internally

FY2027Chapter 12: Diseases of the skin and subcutaneous tissue/L20–L30 Dermatitis and eczema

BillableComplete code, valid to report
Care settingsHome Health Primary · MMTA - Other

L27.8 (also written L278) is a billable ICD-10-CM diagnosis code for dermatitis due to other substances taken internally. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 5 codes in category L27 (Dermatitis due to substances taken internally). The Alphabetic Index lists it under 6 entries. Its coding notes include 1 Excludes1 entry and 23 Excludes2 entries.

Excludes1

Not coded here. The listed conditions generally should not be reported together.

Inherited from L27 Dermatitis due to substances taken internally

Excludes2

Not included here. Both codes may be reported if the patient has both conditions.

Inherited from L27 Dermatitis due to substances taken internally
  • adverse food reaction, except dermatitis (T78.0-T78.1)
  • contact dermatitis (L23-L25)
  • drug photoallergic response (L56.1)
  • drug phototoxic response (L56.0)
  • urticaria (L50.-)
Also from chapter/block level (18 notes)
Inherited from L20–L30 Dermatitis and eczema
  • chronic (childhood) granulomatous disease (D71-)
  • dermatitis gangrenosa (L08.0)
  • dermatitis herpetiformis (L13.0)
  • dry skin dermatitis (L85.3)
  • factitial dermatitis (L98.1)
  • perioral dermatitis (L71.0)
  • radiation-related disorders of the skin and subcutaneous tissue (L55-L59)
  • stasis dermatitis (I87.2)
Inherited from Chapter 12 Diseases of the skin and subcutaneous tissue
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • lipomelanotic reticulosis (I89.8)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
  • systemic connective tissue disorders (M30-M36)
  • viral warts (B07.-)

Care settings

How CMS programs treat this code. These are CMS claim edits and list entries, not coverage or eligibility rules.

Home Health Primary

Accepted as the primary (principal) diagnosis on a home health claim. The Home Health Grouper assigns it to the MMTA - Other clinical group.

Source: CMS Home Health Grouper Software v07.2.26, effective October 1, 2026

Notes

Also from chapter/block level (1 note)
Inherited from L20–L30 Dermatitis and eczema
  • In this block the terms dermatitis and eczema are used synonymously and interchangeably.

Alphabetic Index terms

Terms the official Alphabetic Index lists for this code. 6 entries