Allopathic & Osteopathic Physicians / 207RG0300X
Individual · specialization · Medicare specialty 11
207RG0300X Geriatric Medicine (Internal Medicine) Physician
207RG0300X is the taxonomy code for Geriatric Medicine, a specialization of Internal Medicine, 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 11, Physician/Internal Medicine, under which 128,064 practitioners are enrolled, and to 1 other specialty listed below.
- 1Taxonomy code 207RG0300X
- 2Level Specialization
- 3Medicare specialty 11 Physician/Internal Medicine
- 4Codes in this group 238
Definition
An internist who has special knowledge of the aging process and special skills in the diagnostic, therapeutic, preventive and rehabilitative aspects of illness in the elderly. This specialist cares for geriatric patients in the patient's home, the office, long-term care settings such as nursing homes and the hospital.
— NUCC Health Care Provider Taxonomy, version 26.1
Where 207RG0300X sits
- Group: Allopathic & Osteopathic Physicians — code 55 of 238 in the group
- Classification: Internal Medicine 207R00000X
- Specialization: Geriatric Medicine 207RG0300X
Choose 207RG0300X over the general Internal Medicine code (207R00000X) when the provider's training or certification is specifically in geriatric medicine; 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 207RG0300X to Medicare specialty 11 (Physician/Internal Medicine) and Medicare specialty 38 (Physician/Geriatric Medicine). That specialty — not the taxonomy code itself — is what Medicare enrollment records and uses for payment. 128,064 practitioners are enrolled under it nationally, and 26 other taxonomy codes map to the same specialty.
Other codes under the same Medicare specialty: 207QB0505X Diabetology (Internal Medicine) Physician; 207R00000X Internal Medicine Physician; 207RA0000X Adolescent Medicine (Internal Medicine) Physician; 207RA0001X Advanced Heart Failure and Transplant Cardiology Physician; 207RA0201X Allergy & Immunology (Internal Medicine) Physician; 207RA0401X Addiction Medicine (Internal Medicine) Physician; 207RB0002X Obesity Medicine (Internal Medicine) Physician; 207RC0000X Cardiovascular Disease Physician; and 18 more.
Related codes
| Code | Internal Medicine — other specializations |
|---|---|
| 207QB0505X | Diabetology |
| 207RE0101X | Endocrinology, Diabetes & Metabolism |
| 207RG0100X | Gastroenterology |
| 207RH0000X | Hematology |
| 207RH0003X | Hematology & Oncology |
| 207RI0008X | Hepatology |
The nearest 6 of 30 other codes under Internal Medicine; all are on the group page.
History of 207RG0300X
NUCC's earliest recorded change to 207RG0300X is from 2007 (added definition, added source), and has been revised 1 time since.
- 2007-07-01 — added definition, added source
- 2011-07-01 — modified source
Similar codes in other groups
If 207RG0300X is not quite right, these codes in other groups share a word with it — often the same field practised by a different kind of provider:
- 125Q00000X Oral Medicine Dentistry (Dental Providers)
- 163WC0200X Critical Care Medicine Registered Nurse (Nursing Service Providers)
- 173000000X Legal Medicine (Other Service Providers)
- 1835E0208X Emergency Medicine Pharmacist (Pharmacy Service Providers)
- 1835G0303X Geriatric Pharmacist (Pharmacy Service Providers)
- 364SC0200X Critical Care Medicine Clinical Nurse Specialist (Physician Assistants & Advanced Practice Nursing Providers)
Find providers with 207RG0300X
Using 207RG0300X
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.