B77 – Ascariasis
ICD-10-CM 2027 diagnosis code · Helminthiases
ICD-10-CM code
B77
- Code
B77(claims format:B77)- Description
- Ascariasis
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 1. Certain infectious and parasitic diseases (A00-B99)
- Block
- B65-B83 Helminthiases
Billable codes under B77
B77 is a header code and cannot be used on claims. Choose the most specific code:
- B77.0 – Ascariasis with intestinal complicationsBillable
- B77.8 – Ascariasis with other complicationsHeader (more codes below)
- B77.9 – Ascariasis, unspecifiedBillable
Notes for B77
Includes:
- ascaridiasis
- roundworm infection
Frequently asked questions
What is ICD-10 code B77?
B77 is the ICD-10-CM code for ascariasis, in the block B65-B83 (Helminthiases).
Is B77 a billable code?
No. B77 is a header code with more specific child codes; report one of the billable codes listed above.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.