Sequelae of poliomyelitis
In Sequelae of infectious and parasitic diseases (B90-B94), chapter 1: Certain Infectious and Parasitic Diseases
- B91 is billable and valid on claims for FY 2027. If the record has more detail, check the other codes under B90-B94 below.
- As a secondary diagnosis it is not a CC or MCC, so it doesn't raise the MS-DRG payment.
- Doesn't count toward a Medicare Advantage risk score (no HCC in V28).
- AHRQ's Chronic Condition Indicator classes it as not chronic (an acute or short-term condition).
- 85 US deaths in 2024 had an underlying cause in category B91, per the National Vital Statistics System on CDC WONDER. Death records use WHO ICD-10, so the count is for the whole category.
- Exempt from present-on-admission (POA) reporting. (POA Exempt list)
Also indexed as: Sequelae, poliomyelitis
Advertisements
Instructional notes
Excludes1: not coded here, use a different code
- postpolio syndrome (G14)
Also applies, from Sequelae of infectious and parasitic diseases (B90-B94)
These notes sit on B90-B94 and apply to every code under it, including B91.
Code first: code the underlying condition first, then this code
- condition resulting from (sequela) the infectious or parasitic disease
Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Rules for coding infections and parasitic diseases, including HIV, organism and drug resistance codes, sepsis and septic shock, MRSA, Zika, and COVID-19.
- Human Immunodeficiency Virus (HIV) Infections (page 19)
- Infectious agents as the cause of diseases classified to other chapters (page 22)
- Infections resistant to antibiotics (page 22)
- Sepsis, Severe Sepsis, and Septic Shock (page 23)
- Methicillin Resistant Staphylococcus aureus (MRSA) Conditions (page 27)
- Zika virus infections (page 28)
- Coronavirus infections (page 28)
Other codes under B90-B94
Sequelae of infectious and parasitic diseases (B90-B94)
- B90Sequelae of tuberculosis
- B91Sequelae of poliomyelitis(this code)
- B92Sequelae of leprosy
- B94Sequelae of other and unspecified infectious and parasitic diseases
B91 MS-DRGs
As the principal diagnosis, B91 groups to MS-DRG 091, 092, or 093 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.
Related conditions
Grouped by AHRQ's Clinical Classifications Software Refined (CCSR), which sorts every diagnosis code into clinically meaningful categories.
B91 is in Sequela of specified infectious disease conditions (INF011, its default category), with 12 codes. Others in it:
- B90.0 Sequelae of central nervous system tuberculosis
- B90.1 Sequelae of genitourinary tuberculosis
- B90.2 Sequelae of tuberculosis of bones and joints
- B90.8 Sequelae of tuberculosis of other organs
- B90.9 Sequelae of respiratory and unspecified tuberculosis
- B92 Sequelae of leprosy
- B94.0 Sequelae of trachoma
- B94.1 Sequelae of viral encephalitis
B91 is in Sequela of specified nervous system conditions (NVS022), with 6 codes. Others in it:
Medicare coverage articles listing B91
These 12 Medicare billing and coding articles list B91 as a diagnosis that supports medical necessity for the services they cover. From the CMS Medicare Coverage Database; check your own contractor's article before billing.
- Nerve Conduction Studies and Electromyography (7 contractors)
- Home Health Occupational Therapy
- Home Health Physical Therapy
- Lumbar MRI
- MRI and CT Scans of the Head and Neck
- Outpatient Occupational Therapy
- Outpatient Physical Therapy
- Physical Therapy - Home Health
- Respiratory Care
- Swallowing Studies for Dysphagia
And 2 more.
Other codes that refer to B91
Notes on these codes point to B91.
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
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.
Read more about polio and post-polio syndrome on MedlinePlusCode history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.
ICD-9-CM equivalent
Legacy crosswalk from the CMS General Equivalence Mappings (last updated 2018).
- 138 Late effects of acute poliomyelitis (approximate)