B89

Unspecified parasitic disease

Billable FY2026 2025-10-01 → 2026-09-30

Exclusions 5 never code together

A00-B99chapter

Excludes1

certain localized infections - see body system-related chapters

Excludes2

carrier or suspected carrier of infectious disease (Z22.-)Z22.-
infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)O98.-
infectious and parasitic diseases specific to the perinatal period (P35-P39)P35-P39
influenza and other acute respiratory infections (J00-J22)J00-J22

Excludes1 — never code together. The excluded condition and this one are mutually exclusive.

Excludes2 — not included here, but the patient may have both. Code both when documented.

Instructional notes 2

A00-B99chapter

Includes

diseases generally recognized as communicable or transmissible

Use additional code

code to identify resistance to antimicrobial drugs (Z16.-)Z16.-

Index entries leading here 18

Neuritis (rheumatoid) M79.2
- acoustic (nerve) H93.3
  - in (due to)
    - parasitic disease NEC B89
Arthritis, arthritic (acute) (chronic) (nonpyogenic) (subacute) M19.90
- due to or associated with
  - parasitic disease NEC B89
- in (due to)
  - parasitic disease NEC B89
Palsy G83.9
- cranial nerve — see also Disorder, nerve, cranial
  - multiple G52.7
    - in
      - parasitic disease B89
Cyst (colloid) (mucous) (simple) (retention)
- parasitic B89
Disease, diseased — see also Syndrome
- parasitic B89
Parasitic — see also condition
- disease NEC B89
Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) G04.90
- in (due to)
  - parasitic disease NEC B89
Otitis (acute) H66.90
- externa H60.9
  - in (due to)
    - parasitic disease NEC B89
Infestation B88.9
- parasite, parasitic B89
  - eyelid B89
- eyelid
  - parasitic NOS B89
- orbit, parasitic NOS B89
Hydrocephalus (acquired) (external) (internal) (malignant) (recurrent) G91.9
- in (due to)
  - parasitic disease B89
  - infectious disease NEC B89
Mastoiditis (coalescent) (hemorrhagic) (suppurative) H70.9
- in (due to)
  - parasitic disease NEC B89
Meningitis (basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic) G03.9
- in (due to)
  - parasitic disease NEC B89
Polyneuropathy (peripheral) G62.9
- in (due to)
  - parasitic disease NEC B89
Myopathy G72.9
- in (due to)
  - parasitic disease NEC B89
Iridocyclitis H20.9
- in (due to)
  - parasitic disease NOS B89
Infection, infected, infective (opportunistic) B99.9
- parasitic B89
Meningoencephalitis G04.90
- parasitic NEC B89
Parasitism B89

Additional references

AHA Coding Clinic® Licence required

Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.

Risk adjustment

Maps to no condition category in any loaded model.

Presence is a property of the code. Untick a model to hide it everywhere.

This code

Billable: yes
Code set: FY2026
Block: B85-B89

Present FY2024–FY2027.