B94 vs Z86.1
B94 (Sequelae of other and unspecified infectious and parasitic diseases) compared with Z86.1 (Personal history of infectious and parasitic diseases), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. Z86.1 carries an Excludes1 note covering B94: “sequelae of infectious and parasitic diseases (B90-B94)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| B94Sequelae of other and unspecified infectious and parasitic diseases | Z86.1Personal history of infectious and parasitic diseases | |
|---|---|---|
| Billing status | Non-billable header | Non-billable header |
| Classification | A00-B99 — Certain Infectious and Parasitic Diseases (A00-B99) | Z00-Z99 — Factors Influencing Health Status and Contact with Health Services (Z00-Z99) |
| Definition | Sequelae of other and unspecified infectious and parasitic diseases is a non-billable ICD-10-CM category code (B94). | Personal history of infectious and parasitic diseases is a non-billable ICD-10-CM category code (Z86.1). |
| Includes | — | Conditions classifiable to A00-B89, B99 |
| Code first | condition resulting from (sequela) the infectious or parasitic disease | any follow-up examination after treatment (Z09) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources