156FX1900X — Orthoptist

156FX1900X is the NUCC provider taxonomy code for Orthoptist, a specialization within Technician/Technologist (individual providers). 44 providers in our latest NPPES snapshot list it as their primary taxonomy.

Taxonomy code	156FX1900X
Display name	Orthoptist
Grouping	Eye and Vision Services Providers
Classification	Technician/Technologist
Specialization	Orthoptist
Section	Individual
Directory	Technician/Technologist provider directory

Definition

An orthoptist is an allied health professional skilled in evaluation and treatment of children and adults with eye movement difficulties. Their specialty is strabismus, amblyopia, and double vision.

Definition from the NUCC Health Care Provider Taxonomy code set.

Related taxonomy codes

156F00000X — Technician/Technologist
156FC0800X — Contact Lens Technician/Technologist (Technician/Technologist)
156FC0801X — Contact Lens Fitter (Technician/Technologist)
156FX1700X — Ocularist (Technician/Technologist)
156FX1100X — Ophthalmic Technician/Technologist (Technician/Technologist)
156FX1101X — Ophthalmic Assistant (Technician/Technologist)
156FX1800X — Optician (Technician/Technologist)
156FX1201X — Optometric Assistant Technician (Technician/Technologist)

Frequently asked questions

What does taxonomy code 156FX1900X mean?

156FX1900X is the NUCC Health Care Provider Taxonomy code for Orthoptist, a specialization of Technician/Technologist in the "Eye and Vision Services Providers" grouping. It classifies individual providers.

Where is the taxonomy code used?

Providers select a taxonomy code when applying for an NPI, and it appears on insurance claims (CMS-1500 box 33b / 837 electronic claims) to identify the provider's classification. Payers may require the taxonomy that matches your credential and license.

How do I find providers with taxonomy 156FX1900X?

Browse the Technician/Technologist directory, or use the NPI search and filter by state.

Source: CMS NPPES (public data). Snapshot 2026-07-09.