2251N0400X Neurology Physical Therapist

Definition

A licensed physical therapist, including but not limited to an individual who is a Board Certified Specialist in Neurologic Physical Therapy, who has demonstrated specialized knowledge and skill in neuroanatomy and neurophysiology, including knowledge of central, peripheral, and autonomic nervous systems in populations with and without neurologic conditions; motor control and movement sciences in populations with and without neurologic conditions; behavioral sciences, including psychology and neuropsychology, and psychiatry; and medical management and pharmacology.

— NUCC Health Care Provider Taxonomy, version 26.1

Where 2251N0400X sits

• Group: Respiratory, Developmental, Rehabilitative and Restorative Service Providers — code 38 of 82 in the group
• Classification: Physical Therapist 225100000X
• Specialization: Neurology 2251N0400X

Choose 2251N0400X over the general Physical Therapist code (225100000X) when the provider's training or certification is specifically in neurology; 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 2251N0400X to Medicare specialty 65 (Physical Therapist in Private Practice). That specialty — not the taxonomy code itself — is what Medicare enrollment records and uses for payment. 113,980 practitioners are enrolled under it nationally, and 10 other taxonomy codes map to the same specialty.

Other codes under the same Medicare specialty: 225100000X Physical Therapist; 2251C2600X Cardiopulmonary Physical Therapist; 2251E1200X Ergonomics Physical Therapist; 2251E1300X Clinical Electrophysiology Physical Therapist; 2251G0304X Geriatric Physical Therapist; 2251H1200X Hand Physical Therapist; 2251H1300X Human Factors Physical Therapist; 2251P0200X Pediatric Physical Therapist; and 2 more.

Related codes

The nearest 6 of 10 other codes under Physical Therapist; all are on the group page.

History of 2251N0400X

NUCC's earliest recorded change to 2251N0400X is from 2020 (definition added).

• 2020-01-01 — definition added

Similar codes in other groups

If 2251N0400X 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:

• 2084B0040X Behavioral Neurology & Neuropsychiatry Physician (Allopathic & Osteopathic Physicians)
• 2084N0400X Neurology Physician (Allopathic & Osteopathic Physicians)
• 2084N0402X Neurology with Special Qualifications in Child Neurology Physician (Allopathic & Osteopathic Physicians)
• 2084V0102X Vascular Neurology Physician (Allopathic & Osteopathic Physicians)
• 111NN0400X Neurology Chiropractor (Chiropractic Providers)

Using 2251N0400X

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.