ICD-10-CM 2027
ICD-10 code for internal hirudiniasis
From the official ICD-10-CM alphabetic index entry “Hirudiniasis › internal”. Page updated September 29, 2026.
About coding internal hirudiniasis
The ICD-10-CM code for internal hirudiniasis is B83.4 (Internal hirudiniasis).
Within B83 (other helminthiases), B83.4 is specifically for internal hirudiniasis. Related codes cover visceral larva migrans (B83.0), Gnathostomiasis (B83.1), angiostrongyliasis due to Parastrongylus cantonensis (B83.2), Syngamiasis (B83.3), other specified helminthiases (B83.8) and helminthiasis, unspecified (B83.9).
The conditions in its Excludes2 note aren't part of B83.4, but may be coded alongside it if the patient has both: external hirudiniasis (B88.3).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
Common questions about internal hirudiniasis ICD-10 codes
What is the ICD-10 code for internal hirudiniasis?
- B83.4 — Internal hirudiniasis.
Is B83.4 billable?
- Yes. B83.4 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can B83.4 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict B83.4 as a principal diagnosis.
Is B83.4 a CC or MCC?
- No. B83.4 is neither a CC nor an MCC under MS-DRG v44.0.