Ambulatory Health Care Facilities / 261QA1903X
Non-Individual · specialization · Medicare specialty 49
261QA1903X Ambulatory Surgical Clinic/Center
261QA1903X is the taxonomy code for Ambulatory Surgical, 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 49, Ambulatory Surgical Center, under which 0 practitioners are enrolled.
- 1Taxonomy code 261QA1903X
- 2Level Specialization
- 3Medicare specialty 49 Ambulatory Surgical Center
- 4Codes in this group 63
Definition
NUCC publishes no definition for 261QA1903X; the code is identified by its place in the tree below.
Where 261QA1903X sits
- Group: Ambulatory Health Care Facilities — code 7 of 63 in the group
- Classification: Clinic/Center 261Q00000X
- Specialization: Ambulatory Surgical 261QA1903X
Choose 261QA1903X over the general Clinic/Center code (261Q00000X) when the provider's training or certification is specifically in ambulatory surgical; 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 261QA1903X to Medicare specialty 49 (Ambulatory Surgical Center). That specialty — not the taxonomy code itself — is what Medicare enrollment records and uses for payment. 0 practitioners are enrolled under it nationally.
Related codes
| Code | Clinic/Center — other specializations |
|---|---|
| 261QM0850X | Adult Mental Health |
| 261QA0005X | Ambulatory Family Planning Facility |
| 261QA0006X | Ambulatory Fertility Facility |
| 261QA0900X | Amputee |
| 261QA3000X | Augmentative Communication |
| 261QB0400X | Birthing |
The nearest 6 of 62 other codes under Clinic/Center; all are on the group page.
History of 261QA1903X
NUCC's notes record no dated changes for 261QA1903X. 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 261QA1903X 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:
- 2086S0102X Surgical Critical Care Physician (Allopathic & Osteopathic Physicians)
- 2086X0206X Surgical Oncology Physician (Allopathic & Osteopathic Physicians)
- 163WP2201X Ambulatory Care Registered Nurse (Nursing Service Providers)
- 163WM0705X Medical-Surgical Registered Nurse (Nursing Service Providers)
- 163WW0101X Ambulatory Women's Health Care Registered Nurse (Nursing Service Providers)
- 1835P2201X Ambulatory Care Pharmacist (Pharmacy Service Providers)
Find providers with 261QA1903X
Using 261QA1903X
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.