ICD-10-CM B59 is the diagnosis code for Pneumocystosis. This code falls under the section "Protozoal diseases" within Chapter 1 — Certain infectious and parasitic diseases (A00-B99). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Understanding where B59 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, B59 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
B59 is the ICD-10-CM diagnosis code for "Pneumocystosis". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
B59 is located in Section B50-B64 — "Protozoal diseases" within Chapter 1 of the ICD-10-CM Tabular List.
Use B59 when the patients documented diagnosis matches "Pneumocystosis" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Pneumocystosis is B59.
Yes, B59 can be used as a primary diagnosis code since it is billable and specific.
B59 is in Chapter 1 of the ICD-10-CM Tabular List.
Yes, B59 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.