Allopathic & Osteopathic Physicians / 207WX0120X
Individual · specialization · Medicare specialty 18
207WX0120X Cornea and External Diseases Specialist Physician
207WX0120X is the taxonomy code for Cornea and External Diseases Specialist, a specialization of Ophthalmology, 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 18, Physician/Ophthalmology, under which 20,658 practitioners are enrolled.
- 1Taxonomy code 207WX0120X
- 2Level Specialization
- 3Medicare specialty 18 Physician/Ophthalmology
- 4Codes in this group 238
Definition
An ophthalmologist who specializes in diseases of the cornea, sclera, eyelids, conjunctiva, and anterior segment of the eye.
— NUCC Health Care Provider Taxonomy, version 26.1
Where 207WX0120X sits
- Group: Allopathic & Osteopathic Physicians — code 100 of 238 in the group
- Classification: Ophthalmology 207W00000X
- Specialization: Cornea and External Diseases Specialist 207WX0120X
Choose 207WX0120X over the general Ophthalmology code (207W00000X) when the provider's training or certification is specifically in cornea and external diseases specialist; 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 207WX0120X to Medicare specialty 18 (Physician/Ophthalmology). That specialty — not the taxonomy code itself — is what Medicare enrollment records and uses for payment. 20,658 practitioners are enrolled under it nationally, and 4 other taxonomy codes map to the same specialty.
Other codes under the same Medicare specialty: 207W00000X Ophthalmology Physician; 207WX0109X Neuro-ophthalmology Physician; 207WX0110X Pediatric Ophthalmology and Strabismus Specialist Physician; 207WX0200X Ophthalmic Plastic and Reconstructive Surgery Physician.
Related codes
| Code | Ophthalmology — other specializations |
|---|---|
| 207W00000X | Ophthalmology Physician |
| 207WX0009X | Glaucoma Specialist |
| 207WX0109X | Neuro-ophthalmology |
| 207WX0200X | Ophthalmic Plastic and Reconstructive Surgery |
The nearest 4 of 7 other codes under Ophthalmology; all are on the group page.
History of 207WX0120X
207WX0120X was added to the code set in 2018.
- 2018-01-01 — new
Similar codes in other groups
If 207WX0120X 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:
- 1835I0206X Infectious Diseases Pharmacist (Pharmacy Service Providers)
Find providers with 207WX0120X
Using 207WX0120X
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.