Immunopathology Physician providers in the U.S.
36 NPPES records list immunopathology physician as their primary taxonomy; Iowa and District of Columbia have the most per resident. 1 of them appear in the Medicare Part D prescriber file: a registry record is not proof of an active practice.
What taxonomy code 207ZI0100X means
207ZI0100X is the National Uniform Claim Committee code for Pathology, Immunopathology, in the grouping Allopathic & Osteopathic Physicians. 36 NPPES records list it as their primary taxonomy (file of Aug 9, 2026).
A pathologist who specializes in the diagnosis of immunologic diseases.
Source: NUCC Health Care Provider Taxonomy code set, definition as NUCC publishes it (nucc.org); counts from CMS NPPES.
Most per resident: the 8 highest
Source: CMS NPPES, primary taxonomy 207ZI0100X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.
San Francisco has the most, 4
Source: CMS NPPES, primary taxonomy 207ZI0100X by practice city, file of Aug 9, 2026.
All 16 states and D.C. with records, by state
| State | Records | Per 100,000 |
|---|---|---|
| California | 9 | 0.0 |
| District of Columbia | 1 | 0.1 |
| Georgia | 1 | 0.0 |
| Illinois | 2 | 0.0 |
| Iowa | 3 | 0.1 |
| Maryland | 1 | 0.0 |
| Massachusetts | 2 | 0.0 |
| Michigan | 3 | 0.0 |
| State | Records | Per 100,000 |
|---|---|---|
| Minnesota | 1 | 0.0 |
| Missouri | 3 | 0.0 |
| New York | 4 | 0.0 |
| Pennsylvania | 1 | 0.0 |
| Texas | 2 | 0.0 |
| Utah | 1 | 0.0 |
| Washington | 1 | 0.0 |
| Wisconsin | 1 | 0.0 |
In federal data
- NUCC code207ZI0100X · Pathology
- Size rank596th of 688 specialties by records (0% of all)
- In its family14th of 16 Pathology codes, 0.1% of the family
- Part D prescribers1 (2.8% of records)
- Part D claims560 a year per prescriber, on average (161st of 496)
- Industry payments1 physicians paid $59 in 2024, $59 each on average
- Concentration4 states hold half of all records
Source: CMS NPPES; Medicare Part D Prescriber PUF; CMS Open Payments 2024. Presence in these files is not a quality judgment.
A sample of immunopathology physician records
- Debra Hawes, M.D.Los Angeles, CA1770605453
- Beerelli Seshi, M.D.Torrance, CA1891841953
- Francis Chisari, MDDel Mar, CA1801328331
- Daniel Brubaker, D.O.Fresno, CA1467559526
- Edward Winger, M.D.San Francisco, CA1457487027
- Wen Jing, MDSan Francisco, CA1679651293
- Robin Baker, MDSan Francisco, CA1194804229
- Zuoqin Tang, MDSan Francisco, CA1750429759
- Daniel Baiyee, MDOakland, CA1821263260
- Jayashree Krishnan, MDWashington, DC1679563118
- Ifor Williams, M.D., PH.D.Atlanta, GA1861441214
- John Kemp, MDIowa City, IA1295723070
Registry order, not a ranking. Search by name to find one provider.
Common questions
Why is Immunopathology Physician a thin NUCC code in NPPES?
Only 36 NPIs list Immunopathology Physician as primary taxonomy across 16 states (peak California, 9). That is 596th of 688 NUCC codes by headcount. Thin codes are still searchable by NPI; do not treat the low count as a quality signal.
Do the few Immunopathology Physician NPIs in Open Payments look unusual?
CMS Open Payments 2024 lists 1 paid Immunopathology Physician physicians totaling $59 (1 payments; average $59, 444th of 470 by average). Presence is not a quality judgment; thin specialties often have sparse payment rows.
How much Part D prescribing does this specialty do?
Among Immunopathology Physician NPIs, 1 appear in the Medicare Part D Prescriber PUF (average 560 claims and $11K drug cost per prescriber; 161st of 496 specialties by average claims). Non-prescribing clinicians in the same NUCC code are still in NPPES.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy (nucc.org); Medicare Part D Prescriber PUF; CMS Open Payments 2024. Counts are self-designated primary taxonomy, not board certification.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.