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ICD-10 Guide
ICD-10 CodesB58

B58

Toxoplasmosis

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/05/2025

Code Description

ICD-10 B58 is a billable code used to indicate a diagnosis of toxoplasmosis.

Key Diagnostic Point:

Toxoplasmosis is an infection caused by the protozoan parasite Toxoplasma gondii, which is commonly found in cat feces, contaminated food, and water. The infection can be asymptomatic in healthy individuals but can lead to severe complications in immunocompromised patients, such as those with HIV/AIDS or undergoing chemotherapy. Symptoms may include flu-like signs, lymphadenopathy, and ocular issues. In pregnant women, Toxoplasmosis can cause congenital infections, leading to serious outcomes for the fetus, including hydrocephalus, chorioretinitis, and intracranial calcifications. Diagnosis is typically made through serological testing for Toxoplasma antibodies or PCR testing. Treatment often involves the use of pyrimethamine and sulfadiazine, along with folinic acid to mitigate side effects. In immunocompetent individuals, treatment may not be necessary unless symptoms are severe. The management of Toxoplasmosis requires careful consideration of the patient's immune status and potential complications.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Varied presentation of symptoms depending on the patient's immune status.
  • Need for serological testing and interpretation of results.
  • Potential for co-infections in immunocompromised patients.
  • Differentiation from other protozoal infections and conditions.

Audit Risk Factors

  • Inadequate documentation of serological test results.
  • Failure to document the patient's immune status.
  • Misclassification of symptoms as unrelated conditions.
  • Lack of clarity in treatment protocols followed.

Specialty Focus

Medical Specialties

Infectious Disease

Documentation Requirements

Detailed patient history, lab results, and treatment plans.

Common Clinical Scenarios

Diagnosis and management of Toxoplasmosis in immunocompromised patients.

Billing Considerations

Need for thorough documentation of co-morbidities and treatment responses.

Obstetrics

Documentation Requirements

Documentation of maternal and fetal health, serological testing results.

Common Clinical Scenarios

Screening and management of Toxoplasmosis in pregnant women.

Billing Considerations

Importance of documenting potential congenital effects on the fetus.

Coding Guidelines

Inclusion Criteria

Use B58 When
  • 10 coding guidelines for B58 include proper documentation of the diagnosis, treatment, and any relevant laboratory findings

Exclusion Criteria

Do NOT use B58 When
  • Exclusion criteria include other protozoal infections that may present similarly but require different management

Related Codes

Child Codes

13 codes
B58.0
Toxoplasma chorioretinitis
B58.00
Toxoplasma oculopathy, unspecified
B58.01
Toxoplasma chorioretinitis
B58.09
Other toxoplasma oculopathy
B58.1
Toxoplasma chorioretinitis
B58.2
Toxoplasma chorioretinitis
B58.3
Toxoplasma chorioretinitis
B58.8
Toxoplasmosis due to other specified infectious agent
B58.81
Toxoplasma myocarditis
B58.82
Toxoplasma myositis
B58.83
Toxoplasma tubulo-interstitial nephropathy
B58.89
Toxoplasmosis with other organ involvement
B58.9
Toxoplasmosis, unspecified

Related CPT Codes

86777CPT Code

Toxoplasma antibody test

Clinical Scenario

Used to confirm diagnosis in suspected cases of Toxoplasmosis.

Documentation Requirements

Document the reason for testing and results.

Specialty Considerations

Infectious disease specialists should ensure comprehensive lab documentation.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of Toxoplasmosis, improving the accuracy of data collection and reimbursement processes. It has also enhanced the ability to track epidemiological trends in protozoal infections.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of Toxoplasmosis, improving the accuracy of data collection and reimbursement processes. It has also enhanced the ability to track epidemiological trends in protozoal infections.

Reimbursement & Billing Impact

reimbursement processes. It has also enhanced the ability to track epidemiological trends in protozoal infections.

Resources

Clinical References

  • •
    CDC Toxoplasmosis Information

Coding & Billing References

  • •
    CDC Toxoplasmosis Information

Frequently Asked Questions

What are the common symptoms of Toxoplasmosis?

Common symptoms include flu-like signs such as fever, muscle aches, and fatigue. In severe cases, especially in immunocompromised individuals, it can lead to neurological symptoms and ocular issues.

How is Toxoplasmosis diagnosed?

Diagnosis is typically made through serological testing for Toxoplasma antibodies (IgG and IgM) and may include imaging studies to assess for complications.