Ambulatory Health Care Facilities / 261QS1200X
Non-Individual · specialization · Medicare specialty C0
261QS1200X Sleep Disorder Diagnostic Clinic/Center
261QS1200X is the taxonomy code for Sleep Disorder Diagnostic, a specialization of Clinic/Center, in the NUCC group “Ambulatory Health Care Facilities”. It is a code for organizations — the kind used on a Type 2 NPI. Medicare maps it to specialty C0, Physician/Sleep Medicine, under which 1,328 practitioners are enrolled.
- 1Taxonomy code 261QS1200X
- 2Level Specialization
- 3Medicare specialty C0 Physician/Sleep Medicine
- 4Codes in this group 63
Definition
NUCC publishes no definition for 261QS1200X; the code is identified by its place in the tree below.
Where 261QS1200X sits
- Group: Ambulatory Health Care Facilities — code 60 of 63 in the group
- Classification: Clinic/Center 261Q00000X
- Specialization: Sleep Disorder Diagnostic 261QS1200X
Choose 261QS1200X over the general Clinic/Center code (261Q00000X) when the provider's training or certification is specifically in sleep disorder diagnostic; 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 261QS1200X to Medicare specialty C0 (Physician/Sleep Medicine). That specialty — not the taxonomy code itself — is what Medicare enrollment records and uses for payment. 1,328 practitioners are enrolled under it nationally, and 5 other taxonomy codes map to the same specialty.
Other codes under the same Medicare specialty: 207QS1201X Sleep Medicine (Family Medicine) Physician; 207RS0012X Sleep Medicine (Internal Medicine) Physician; 207YS0012X Sleep Medicine (Otolaryngology) Physician; 2080S0012X Pediatric Sleep Medicine Physician; 2084S0012X Sleep Medicine (Psychiatry & Neurology) Physician.
Related codes
| Code | Clinic/Center — other specializations |
|---|---|
| 261QR0405X | Rehabilitation, Substance Use Disorder |
| 261QR1100X | Research |
| 261QR1300X | Rural Health |
| 261QS1000X | Student Health |
| 261QU0200X | Urgent Care |
| 261QV0200X | VA |
The nearest 6 of 62 other codes under Clinic/Center; all are on the group page.
History of 261QS1200X
NUCC's notes record no dated changes for 261QS1200X. The code set is republished every January and July, when codes are added, retitled or marked inactive; this page reflects version 26.1, so check the NUCC site if you are reading it after the next release.
Similar codes in other groups
If 261QS1200X 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:
- 207QS1201X Sleep Medicine (Family Medicine) Physician (Allopathic & Osteopathic Physicians)
- 207RS0012X Sleep Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians)
- 207YS0012X Sleep Medicine (Otolaryngology) Physician (Allopathic & Osteopathic Physicians)
- 2080S0012X Pediatric Sleep Medicine Physician (Allopathic & Osteopathic Physicians)
- 2084D0003X Diagnostic Neuroimaging (Psychiatry & Neurology) Physician (Allopathic & Osteopathic Physicians)
- 2084S0012X Sleep Medicine (Psychiatry & Neurology) Physician (Allopathic & Osteopathic Physicians)
Find providers with 261QS1200X
Using 261QS1200X
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.