Medical Biochemical Genetics providers in the U.S.
24 NPPES records list medical biochemical genetics as their primary taxonomy; California and Texas have the most per resident. 2 of them appear in the Medicare Part D prescriber file: a registry record is not proof of an active practice.
What taxonomy code 207SG0207X means
207SG0207X is the National Uniform Claim Committee code for Medical Genetics, Medical Biochemical Genetics, in the grouping Allopathic & Osteopathic Physicians. 24 NPPES records list it as their primary taxonomy (file of Aug 9, 2026).
A medical biochemical geneticist specializes in the diagnosis, evaluation, prevention, and treatment of patients with biochemical genetic disorders, defined as inborn errors of metabolism at any age of onset. Training does not include those skills and knowledge necessary to direct a clinical laboratory.
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 207SG0207X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.
Palo Alto has the most, 3
Source: CMS NPPES, primary taxonomy 207SG0207X by practice city, file of Aug 9, 2026.
All 15 states and D.C. with records, by state
| State | Records | Per 100,000 |
|---|---|---|
| Arizona | 1 | 0.0 |
| California | 5 | 0.0 |
| Colorado | 1 | 0.0 |
| Georgia | 1 | 0.0 |
| Illinois | 1 | 0.0 |
| Maryland | 1 | 0.0 |
| Massachusetts | 1 | 0.0 |
| Michigan | 1 | 0.0 |
| State | Records | Per 100,000 |
|---|---|---|
| New York | 1 | 0.0 |
| Pennsylvania | 2 | 0.0 |
| South Carolina | 1 | 0.0 |
| Texas | 3 | 0.0 |
| Utah | 1 | 0.0 |
| Washington | 3 | 0.0 |
| Wisconsin | 1 | 0.0 |
In federal data
- NUCC code207SG0207X · Medical Genetics
- Size rank626th of 688 specialties by records (0% of all)
- In its family5th of 7 Medical Genetics codes, 1.7% of the family
- Part D prescribers2 (8.3% of records)
- Part D claims26 a year per prescriber, on average (455th of 496)
- Industry payments9 physicians paid $5K in 2024, $507 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 medical biochemical genetics records
- Shagun KaurPhoenix, AZ1245766757
- Ryan Peretz, MDTorrance, CA1033562053
- Annette Feigenbaum, M.D.San Diego, CA1902187859
- Gregory Enns, M.D.Palo Alto, CA1508961897
- Jonathan Bernstein, M.D., PH.D.Palo Alto, CA1508052960
- Suha Bachir, MDPalo Alto, CA1144754490
- Warren StopakAurora, CO1134700016
- Rana Al-Jaberi, MDAtlanta, GA1780174078
- Gurnoor Lail, MB BCH BAO (MD)Chicago, IL1831947076
- William Choi, MD, PHDBoston, MA1861923658
- Tamanna Roshan Lal, MB CHBChevy Chase, MD1699069591
- Shibani Kanungo, MDKalamazoo, MI1659563088
Registry order, not a ranking. Search by name to find one provider.
Common questions
Why is Medical Biochemical Genetics a thin NUCC code in NPPES?
Only 24 NPIs list Medical Biochemical Genetics as primary taxonomy across 15 states (peak California, 5). That is 626th 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 Medical Biochemical Genetics NPIs in Open Payments look unusual?
CMS Open Payments 2024 lists 9 paid Medical Biochemical Genetics physicians totaling $5K (23 payments; average $507, 287th 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 Medical Biochemical Genetics NPIs, 2 appear in the Medicare Part D Prescriber PUF (average 26 claims and $443K drug cost per prescriber; 455th 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.