B91 — Sequelae of poliomyelitis
Is B91 billable?
Yes — B91 is billable for FY2027. B91 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. B91 may be submitted for encounters from October 1, 2026 through September 30, 2027.
B91 at a glance
| Code | B91 |
|---|---|
| Description | Sequelae of poliomyelitis |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does B91 group to?
B91 sits in MDC 01 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 091Other Disorders of Nervous System with MCCmedical
- 092Other Disorders of Nervous System with CCmedical
- 093Other Disorders of Nervous System without CC/MCCmedical
How is B91 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to B91. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Sequelae › poliomyelitis (of)
Excludes1 — never code together
The conditions below can never be reported together with B91 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- postpolio syndrome (G14)
Code first — inherited from B90-B94
The underlying condition below must be sequenced before B91. B91 describes a manifestation and cannot be the principal or first-listed diagnosis.
- condition resulting from (sequela) the infectious or parasitic disease
Use additional code — inherited from Chapter 1
Report an additional code alongside B91 to fully describe the condition. B91 is sequenced first.
- code to identify resistance to antimicrobial drugs (Z16.-)
Excludes2 — not included here — inherited from Chapter 1
The conditions below are not part of B91, but a patient may have both at the same time. When documentation supports it, B91 and the excluded code may both be reported.
- carrier or suspected carrier of infectious disease (Z22.-)
- certain localized infections - see body system-related chapters
- infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
- infectious and parasitic diseases specific to the perinatal period (P35-P39)
- influenza and other acute respiratory infections (J00-J22)
How long has B91 existed?
B91 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.
Which codes are confused with B91?
ICD-10-CM declares these codes mutually exclusive with B91 — exactly one of each pair can be correct for a given encounter.