ICD-10-CM 2027
ICD-10 code for submucous fibrosis
From the official ICD-10-CM alphabetic index entry “Fibrosis, fibrotic › submucous (oral) (tongue)”. Page updated September 29, 2026.
About coding submucous fibrosis
The ICD-10-CM code for submucous fibrosis is K13.5 (Oral submucous fibrosis).
Within K13 (other diseases of lip and oral mucosa), K13.5 is specifically for oral submucous fibrosis. Related codes cover diseases of lips (K13.0), cheek and lip biting (K13.1), leukoplakia and other disturbances of oral epithelium, including tongue (K13.2), Hairy leukoplakia (K13.3), granuloma and granuloma-like lesions of oral mucosa (K13.4), Irritative hyperplasia of oral mucosa (K13.6) and other and unspecified lesions of oral mucosa (K13.7).
Use an additional code to identify: alcohol abuse and dependence (F10.-), exposure to environmental tobacco smoke (Z77.22), exposure to tobacco smoke in the perinatal period (P96.81), history of tobacco dependence (Z87.891), occupational exposure to environmental tobacco smoke (Z57.31) and 2 more.
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
Common questions about submucous fibrosis ICD-10 codes
What is the ICD-10 code for submucous fibrosis?
- K13.5 — Oral submucous fibrosis.
Is K13.5 billable?
- Yes. K13.5 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can K13.5 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict K13.5 as a principal diagnosis.
Is K13.5 a CC or MCC?
- No. K13.5 is neither a CC nor an MCC under MS-DRG v44.0.