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  6. 2025 ICD-10-CM Code B89

2025 ICD-10-CM Diagnosis Code B89

Unspecified parasitic disease

ICD-10-CM Code:
B89
ICD-10 Code for:
Unspecified parasitic disease
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Not chronic
Code Navigator:

B89 is a billable diagnosis code used to specify a medical diagnosis of unspecified parasitic disease. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2024 through September 30, 2025.

Unspecified diagnosis codes like B89 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

Code Classification

  • Certain infectious and parasitic diseases
    A00–B99
    • Pediculosis, acariasis and other infestations
      B85-B89
      • Unspecified parasitic disease
        B89

Approximate Synonyms

The following list of clinical terms are approximate synonyms, alternative descriptions, or common phrases that might be used by patients, healthcare providers, or medical coders to describe the same condition. These synonyms and related diagnosis terms are often used when searching for an ICD-10 code, especially when the exact medical terminology is unclear. Whether you're looking for lay terms, similar diagnosis names, or common language alternatives, this list can help guide you to the correct ICD-10 classification.

  • Arthritis due to parasitic infection
  • Arthritis due to parasitic infection
  • Arthritis due to parasitic infection
  • Arthritis of lower limb due to parasitic infection
  • Cardiovascular abnormality due to infective myocarditis
  • Cyst of spinal cord caused by parasite
  • Cyst of spinal subdural space caused by parasite
  • Dilated cardiomyopathy due to infectious disease
  • Dilated cardiomyopathy due to parasitic myocarditis
  • Early neonatal parasitic infection
  • Epilepsy due to parasitic disease
  • Fetal parasitic infection
  • Gastric ulcer due to parasitic infection
  • Glomerular disease due to infectious disease
  • Glomerular disease due to parasitic disease
  • Granuloma of spinal cord caused by parasite
  • Granuloma of spinal subdural space caused by parasite
  • Infection causing cyst of central nervous system
  • Infection causing cyst of central nervous system
  • Infection causing cyst of central nervous system
  • Infection causing granuloma of extradural space of spinal cord
  • Infection causing spinal epidural cyst
  • Infection causing spinal subdural cyst
  • Infection causing spondyloarthritis
  • Infection of anterior chamber of eye caused by parasite
  • Infection of anterior chamber of eye caused by parasite
  • Infection of bile duct caused by parasite
  • Infection of bursa caused by parasite
  • Infection of intervertebral disc caused by parasite
  • Infection of liver caused by parasite
  • Infection of respiratory tract caused by parasite
  • Infectious cirrhosis
  • Infectious panuveitis
  • Infective ulcer of esophagus
  • Nematode infestation of skin
  • Panuveitis caused by parasite
  • Parasitic chorioretinitis
  • Parasitic chorioretinitis
  • Parasitic choroiditis
  • Parasitic cirrhosis
  • Parasitic cyst of orbit
  • Parasitic disease
  • Parasitic disease due to human immunodeficiency virus infection
  • Parasitic endophthalmitis
  • Parasitic eyelid infestation
  • Parasitic infection causing gastritis
  • Parasitic infection causing granuloma of cerebrum
  • Parasitic infection causing myelitis
  • Parasitic infection causing ulcer of esophagus
  • Parasitic infection of central nervous system
  • Parasitic infection of cranial nerve
  • Parasitic infection of lacrimal gland
  • Parasitic infection of lung
  • Parasitic infection of peripheral nerve
  • Parasitic infection of skin
  • Parasitic infection of vertebra
  • Parasitic infestation of bilateral eyelids
  • Parasitic infestation of left eyelid
  • Parasitic infestation of orbit
  • Parasitic infestation of right eyelid
  • Parasitic keratitis
  • Parasitic meningitis
  • Parasitic myocarditis
  • Parasitic myositis
  • Parasitic pericarditis
  • Parasitic peritonitis
  • Parasitic spinal cord compression
  • Parasitic tenosynovitis
  • Pneumonia due to parasitic infestation
  • Spinal epidural cyst caused by parasite
  • Spinal epidural granuloma caused by parasite
  • Spondyloarthritis caused by parasite
  • Trypanosomiasis with encephalitis

Clinical Classification

Clinical Classifications group individual ICD-10-CM diagnosis codes into broader, clinically meaningful categories. These categories help simplify complex data by organizing related conditions under common clinical themes.

They are especially useful for data analysis, reporting, and clinical decision-making. Even when diagnosis codes differ, similar conditions can be grouped together based on their clinical relevance. Each category is assigned a unique CCSR code that represents a specific clinical concept, often tied to a body system or medical specialty.

Parasitic, other specified and unspecified infections

CCSR Code: INF009

Inpatient Default: Y - Yes, default inpatient assignment for principal diagnosis or first-listed diagnosis.

Outpatient Default: Y - Yes, default outpatient assignment for principal diagnosis or first-listed diagnosis.

Clinical Information

  • Parasitic Endophthalmitis

    infection of the interior of the eye, especially the aqueous and/or vitreous humor, by a parasite.

Index to Diseases and Injuries References

The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).

Convert B89 to ICD-9-CM

Below are the ICD-9 codes that most closely match this ICD-10 code, based on the General Equivalence Mappings (GEMs). This ICD-10 to ICD-9 crosswalk tool is helpful for coders who need to reference legacy diagnosis codes for audits, historical claims, or approximate code comparisons.

Infect/parasite dis NOS

ICD-9-CM: 136.9

Approximate Flag - The approximate mapping means this ICD-10 code does not have an exact ICD-9 equivalent. The matched code is the closest available option, but it may not fully capture the original diagnosis or clinical intent.

View Conversion

Patient Education


Parasitic Diseases

Parasites are living things that use other living things - like your body - for food and a place to live. You can get them from contaminated food or water, a bug bite, or sexual contact. Some parasitic diseases are easily treated and some are not.

Parasites range in size from tiny, one-celled organisms called protozoa to worms that can be seen with the naked eye. Some parasitic diseases occur in the United States. Contaminated water supplies can lead to Giardia infections. Cats can transmit toxoplasmosis, which is dangerous for pregnant women. Others, like malaria, are common in other parts of the world.

If you are traveling, it's important to drink only water you know is safe. Prevention is especially important. There are no vaccines for parasitic diseases. Some medicines are available to treat parasitic infections.


[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.

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.