Allopathic & Osteopathic Physicians / 2084N0400X
Individual · specialization · Medicare specialty 13
2084N0400X Neurology Physician
2084N0400X is the taxonomy code for Neurology, a specialization of Psychiatry & Neurology, 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 13, Physician/Neurology, under which 21,541 practitioners are enrolled, and to 1 other specialty listed below.
- 1Taxonomy code 2084N0400X
- 2Level Specialization
- 3Medicare specialty 13 Physician/Neurology
- 4Codes in this group 238
Definition
A Neurologist specializes in the diagnosis and treatment of diseases or impaired function of the brain, spinal cord, peripheral nerves, muscles, autonomic nervous system, and blood vessels that relate to these structures.
— NUCC Health Care Provider Taxonomy, version 26.1
Where 2084N0400X sits
- Group: Allopathic & Osteopathic Physicians — code 202 of 238 in the group
- Classification: Psychiatry & Neurology
- Specialization: Neurology 2084N0400X
Choose 2084N0400X over the general Psychiatry & Neurology code 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 2084N0400X to Medicare specialty 13 (Physician/Neurology) and Medicare specialty 86 (Physician/Neuropsychiatry). That specialty — not the taxonomy code itself — is what Medicare enrollment records and uses for payment. 21,541 practitioners are enrolled under it nationally, and 22 other taxonomy codes map to the same specialty.
Other codes under the same Medicare specialty: 2084A2900X Neurocritical Care Physician; 2084E0001X Epilepsy Physician; 2084N0402X Neurology with Special Qualifications in Child Neurology Physician; 2085N0700X Neuroradiology Physician; 2084A0401X Addiction Medicine (Psychiatry & Neurology) Physician; 2084B0002X Obesity Medicine (Psychiatry & Neurology) Physician; 2084B0040X Behavioral Neurology & Neuropsychiatry Physician; 2084D0003X Diagnostic Neuroimaging (Psychiatry & Neurology) Physician; and 14 more.
Related codes
| Code | Psychiatry & Neurology — other specializations |
|---|---|
| 2084H0002X | Hospice and Palliative Medicine |
| 2084A2900X | Neurocritical Care |
| 2084P0005X | Neurodevelopmental Disabilities |
| 2084N0402X | Neurology with Special Qualifications in Child Neurology |
| 2084N0008X | Neuromuscular Medicine |
| 2084B0002X | Obesity Medicine |
The nearest 6 of 22 other codes under Psychiatry & Neurology; all are on the group page.
History of 2084N0400X
2084N0400X was added to the code set in 2007.
- 2007-01-01 — new definition
Similar codes in other groups
If 2084N0400X 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:
- 111NN0400X Neurology Chiropractor (Chiropractic Providers)
- 2251N0400X Neurology Physical Therapist (Respiratory, Developmental, Rehabilitative and Restorative Service Providers)
Find providers with 2084N0400X
Using 2084N0400X
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.