A80.9 — Acute poliomyelitis, unspecified
Is A80.9 billable?
Yes, but A80.9 is an unspecified code. A80.9 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, A80.9 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting A80.9 — the more specific alternatives are listed below.
A80.9 at a glance
| Code | A80.9 |
|---|---|
| Description | Acute poliomyelitis, unspecified |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does A80.9 group to?
A80.9 sits in MDC 01 and helps define the logic of 2 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 023Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis with MCC or Antineoplastic Implant or Epilepsy with Neurostimulatorsurgical
- 024Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis without MCCsurgical
How is A80.9 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to A80.9. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Heine-Medin disease
- Polioencephalitis (acute) (bulbar)
- Polioencephalomyelitis (acute) (anterior)
- Poliomyelitis (acute) (anterior) (epidemic)
- Meningitis › poliovirus (basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic)
- Poliomyelitis › nonepidemic (acute) (anterior) (epidemic)
- Poliomyelitis › spinal, acute (acute) (anterior) (epidemic)
- Encephalitis › in › poliovirus (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute)
- Meningitis › in › poliovirus (basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic)
Excludes1 — never code together — inherited from A80-A89
The conditions below can never be reported together with A80.9 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes1 — never code together — inherited from A80
The conditions below can never be reported together with A80.9 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- acute flaccid myelitis (G04.82)
Use additional code — inherited from Chapter 1
Report an additional code alongside A80.9 to fully describe the condition. A80.9 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 A80.9, but a patient may have both at the same time. When documentation supports it, A80.9 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 A80.9 existed?
A80.9 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.