Allopathic & Osteopathic Physicians / 207ZC0500X
Individual · specialization · Medicare specialty 22
207ZC0500X Cytopathology Physician
207ZC0500X is the taxonomy code for Cytopathology, a specialization of Pathology, in the NUCC group “Allopathic & Osteopathic Physicians”. It is a code for individual providers — the kind used on a Type 1 NPI. Medicare maps it to specialty 22, Physician/Pathology, under which 14,667 practitioners are enrolled.
- 1Taxonomy code 207ZC0500X
- 2Level Specialization
- 3Medicare specialty 22 Physician/Pathology
- 4Codes in this group 238
Definition
A cytopathologist is an anatomic pathologist trained in the diagnosis of human disease by means of the study of cells obtained from body secretions and fluids, by scraping, washing, or sponging the surface of a lesion, or by the aspiration of a tumor mass or body organ with a fine needle. A major aspect of a cytopathologist's practice is the interpretation of Papanicolaou-stained smears of cells from the female reproductive systems, the "Pap" test. However, the cytopathologist's expertise is applied to the diagnosis of cells from all systems and areas of the body. He/she is a consultant to all medical specialists.
— NUCC Health Care Provider Taxonomy, version 26.1
Where 207ZC0500X sits
- Group: Allopathic & Osteopathic Physicians — code 133 of 238 in the group
- Classification: Pathology
- Specialization: Cytopathology 207ZC0500X
Choose 207ZC0500X over the general Pathology code when the provider's training or certification is specifically in cytopathology; the general code covers the classification as a whole. A provider may report more than one taxonomy code on an NPI but marks one as primary.
Medicare
CMS's taxonomy crosswalk links 207ZC0500X to Medicare specialty 22 (Physician/Pathology). That specialty — not the taxonomy code itself — is what Medicare enrollment records and uses for payment. 14,667 practitioners are enrolled under it nationally, and 15 other taxonomy codes map to the same specialty.
Other codes under the same Medicare specialty: 207ZB0001X Blood Banking & Transfusion Medicine Physician; 207ZC0006X Clinical Pathology Physician; 207ZC0008X Clinical Informatics (Pathology) Physician; 207ZD0900X Dermatopathology (Pathology) Physician; 207ZF0201X Forensic Pathology Physician; 207ZH0000X Hematology (Pathology) Physician; 207ZI0100X Immunopathology Physician; 207ZM0300X Medical Microbiology Physician; and 7 more.
Related codes
| Code | Pathology — other specializations |
|---|---|
| 207ZC0008X | Clinical Informatics |
| 207ZC0006X | Clinical Pathology |
| 207ZP0105X | Clinical Pathology/Laboratory Medicine |
| 207ZD0900X | Dermatopathology |
| 207ZF0201X | Forensic Pathology |
| 207ZH0000X | Hematology |
The nearest 6 of 15 other codes under Pathology; all are on the group page.
History of 207ZC0500X
NUCC's earliest recorded change to 207ZC0500X is from 2007 (definition changed, source added).
- 2007-07-01 — definition changed, source added
Find providers with 207ZC0500X
Using 207ZC0500X
The code goes in the taxonomy field of the NPI application in NPPES, and on claims where a payer asks for it — box 24J (shaded) or 33b on the CMS-1500 with the ZZ qualifier, or the PRV segment of an 837 electronic claim. Payers match it against the taxonomy on the NPI record and, for Medicare, against the specialty on the enrollment, so all three should agree. To see which code a provider uses, search their NPI in the lookup.
Sources: NUCC Health Care Provider Taxonomy code set, version 26.1 (CSV); CMS Medicare Provider and Supplier Taxonomy Crosswalk, August 2026; CMS Medicare Fee-For-Service Public Provider Enrollment, extract of 2026-09-29. Checked 2026-10-24. Methodology.