Allopathic & Osteopathic Physicians / 207RS0012X
Individual · specialization · Medicare specialty 11
207RS0012X Sleep Medicine (Internal Medicine) Physician
207RS0012X is the taxonomy code for Sleep 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 207RS0012X
- 2Level Specialization
- 3Medicare specialty 11 Physician/Internal Medicine
- 4Codes in this group 238
Definition
An Internist who practices Sleep Medicine is certified in the subspecialty of sleep medicine and specializes in the clinical assessment, physiologic testing, diagnosis, management and prevention of sleep and circadian rhythm disorders. Sleep specialists treat patients of any age and use multidisciplinary approaches. Disorders managed by sleep specialists include, but are not limited to, sleep related breathing disorders, insomnia, hypersomnias, circadian rhythm sleep disorders, parasomnias and sleep related movement disorders.
— NUCC Health Care Provider Taxonomy, version 26.1
Where 207RS0012X sits
- Group: Allopathic & Osteopathic Physicians — code 70 of 238 in the group
- Classification: Internal Medicine 207R00000X
- Specialization: Sleep Medicine 207RS0012X
Choose 207RS0012X over the general Internal Medicine code (207R00000X) when the provider's training or certification is specifically in sleep 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 207RS0012X to Medicare specialty 11 (Physician/Internal Medicine) and Medicare specialty C0 (Physician/Sleep 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 30 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 22 more.
Related codes
| Code | Internal Medicine — other specializations |
|---|---|
| 207RP1002X | Physician Nutrition Specialist |
| 207RP1001X | Pulmonary Disease |
| 207RR0500X | Rheumatology |
| 207RS0010X | Sports Medicine |
| 207RT0003X | Transplant Hepatology |
The nearest 5 of 30 other codes under Internal Medicine; all are on the group page.
History of 207RS0012X
207RS0012X was added to the code set in 2006.
- 2006-07-01 — new
Similar codes in other groups
If 207RS0012X 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)
- 173F00000X Sleep Specialist (PhD) (Other Service Providers)
- 1835E0208X Emergency Medicine Pharmacist (Pharmacy Service Providers)
- 364SC0200X Critical Care Medicine Clinical Nurse Specialist (Physician Assistants & Advanced Practice Nursing Providers)
Find providers with 207RS0012X
Using 207RS0012X
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.