ICD-10 Code B70 – Diphyllobothriasis and Sparganosis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B70 – Diphyllobothriasis and sparganosis
What it is
B70 identifies infection with tapeworms in the genus Diphyllobothrium or sparganum larval infection. Use it when the record documents this specific parasitic disease.
Clinical signs
Clinical features vary; refer to documentation. Reported findings may include gastrointestinal symptoms, passage of tapeworm segments, or evidence of larval infection after exposure history supports the diagnosis.
When to use this code
Use B70 when the clinician documents diphyllobothriasis or sparganosis as the confirmed diagnosis. It may also fit when the note specifies a tapeworm infection caused by these organisms and no more specific code is provided.
If the chart only mentions suspected parasite exposure, symptoms without confirmation, or another helminth infection, check documentation before assigning B70. Code the documented organism and condition, not a general intestinal parasite diagnosis.
Do not use for
Do not use B70 for unspecified intestinal helminth infections, foodborne illness without a confirmed parasite, or other tapeworm diseases. Check documentation if the organism is not clearly stated.
Coding tip
Assign B70 only when the provider names diphyllobothriasis or sparganosis; otherwise, query for the specific parasite diagnosis.