2026 ICD-10-CM Diagnosis Code B91Sequelae of poliomyelitis

ICD-10-CM Codes›A00–B99›B90-B94›B91

ICD-10-CM B91
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

B91 is a billable ICD-10-CM diagnosis code for sequelae of poliomyelitis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The code is exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Sequela of specified infectious disease conditions and Sequela of specified nervous system conditions.

Code Identity

ICD-10-CM Code
B91
Billable Status
Yes — Valid for Submission
Code Describes
Sequelae of poliomyelitis
Chapter
B90-B94
Sequelae of infectious and parasitic diseases

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionB90-B94Sequelae of infectious and parasitic diseases
CategoryB91Sequelae of poliomyelitis
This CodeB91Sequelae of poliomyelitis

Present on Admission (POA)Billing

B91 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Bilateral osteopathy of feet following poliomyelitis
  • Late effects of poliomyelitis
  • Neurogenic urinary bladder following poliomyelitis
  • Neuromuscular scoliosis due to and following poliomyelitis
  • Neuromuscular scoliosis of lumbar spine
  • Neuromuscular scoliosis of thoracic spine
  • Neuromuscular scoliosis of thoracolumbar spine
  • Osteopathy of ankle joint region following poliomyelitis
  • Osteopathy of bilateral ankles following poliomyelitis
  • Osteopathy of bilateral femurs following poliomyelitis
  • Osteopathy of bilateral fibulas following poliomyelitis
  • Osteopathy of bilateral tibias following poliomyelitis
  • Osteopathy of femur following poliomyelitis
  • Osteopathy of fibula following poliomyelitis
  • Osteopathy of left ankle following poliomyelitis
  • Osteopathy of left femur following poliomyelitis
  • Osteopathy of left fibula following poliomyelitis
  • Osteopathy of left foot following poliomyelitis
  • Osteopathy of left humerus following poliomyelitis
  • Osteopathy of left tibia following poliomyelitis
  • Osteopathy of right ankle following poliomyelitis
  • Osteopathy of right femur following poliomyelitis
  • Osteopathy of right fibula following poliomyelitis
  • Osteopathy of right foot following poliomyelitis
  • Osteopathy of right humerus following poliomyelitis
  • Osteopathy of right tibia following poliomyelitis
  • Osteopathy of tibia following poliomyelitis
  • Paresis as late effect of poliomyelitis
  • Poliomyelitis osteopathy of the ankle and/or foot
  • Poliomyelitis osteopathy of the lower leg
  • Poliomyelitis osteopathy of the upper arm
  • Scoliosis due to and following infection
  • Thoracolumbar neuromuscular scoliosis due to and following poliomyelitis

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Type 1 Excludes

  • postpolio syndrome G14

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Sequelae(of)
      • poliomyelitis (acute)

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR INF011
Sequela of specified infectious disease conditions
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR NVS022
Sequela of specified nervous system conditions
Default principal diagnosis: inpatient No · outpatient No

Patient EducationClinical

Polio and Post-Polio Syndrome

Polio, or poliomyelitis, is a disease that spreads from person to person. It is caused by the poliovirus. The virus attacks the nervous system. In serious cases, it can cause paralysis (where you can't move parts of the body). The paralysis may be lifelong and can sometimes be life-threatening.

The full article covers:

  • What is polio?
  • How does polio spread?
  • Who is more likely to develop polio?
  • What are the symptoms of polio?
  • What is post-polio syndrome (PPS)?
  • How is polio diagnosed?
  • What are the treatments for polio and post-polio syndrome (PPS)?
  • Can polio be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert B91 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
138 Late effect acute polio
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About B91Overview

Is B91 (Sequelae of poliomyelitis) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report sequelae of poliomyelitis on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Is B91 exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for sequelae of poliomyelitis on inpatient claims.

What is the ICD-9 equivalent of B91?

Under the General Equivalence Mappings, sequelae of poliomyelitis converts to ICD-9-CM 138 (late effect acute polio). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.