Allopathic & Osteopathic Physicians / 2084A0401X
Individual · specialization · Medicare specialty 79
2084A0401X Addiction Medicine (Psychiatry & Neurology) Physician
2084A0401X is the taxonomy code for Addiction Medicine, 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 79, Physician/Addiction Medicine, under which 793 practitioners are enrolled, and to 1 other specialty listed below.
- 1Taxonomy code 2084A0401X
- 2Level Specialization
- 3Medicare specialty 79 Physician/Addiction Medicine
- 4Codes in this group 238
Definition
A doctor of osteopathy board eligible/certified in the field of Psychiatry by the American Osteopathic Board of Neurology and Psychiatry is able to obtain a Certificate of Added Qualifications in the field of Addiction Medicine
— NUCC Health Care Provider Taxonomy, version 26.1
Where 2084A0401X sits
- Group: Allopathic & Osteopathic Physicians — code 189 of 238 in the group
- Classification: Psychiatry & Neurology
- Specialization: Addiction Medicine 2084A0401X
Choose 2084A0401X over the general Psychiatry & Neurology code when the provider's training or certification is specifically in addiction medicine; 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 2084A0401X to Medicare specialty 79 (Physician/Addiction Medicine) and Medicare specialty 86 (Physician/Neuropsychiatry). That specialty — not the taxonomy code itself — is what Medicare enrollment records and uses for payment. 793 practitioners are enrolled under it nationally, and 22 other taxonomy codes map to the same specialty.
Other codes under the same Medicare specialty: 207L00000X Anesthesiology Physician; 207QA0401X Addiction Medicine (Family Medicine) Physician; 207RA0401X Addiction Medicine (Internal Medicine) Physician; 2084B0002X Obesity Medicine (Psychiatry & Neurology) Physician; 2084B0040X Behavioral Neurology & Neuropsychiatry Physician; 2084D0003X Diagnostic Neuroimaging (Psychiatry & Neurology) Physician; 2084F0202X Forensic Psychiatry Physician; 2084H0002X Hospice and Palliative Medicine (Psychiatry & Neurology) Physician; and 14 more.
Related codes
| Code | Psychiatry & Neurology — other specializations |
|---|---|
| 2084P0802X | Addiction Psychiatry |
| 2084B0040X | Behavioral Neurology & Neuropsychiatry |
| 2084P0301X | Brain Injury Medicine |
The nearest 3 of 22 other codes under Psychiatry & Neurology; all are on the group page.
History of 2084A0401X
NUCC's earliest recorded change to 2084A0401X is from 2008 (definition added, source added), and has been revised 1 time since.
- 2008-01-01 — definition added, source added
- 2011-07-01 — modified source
Similar codes in other groups
If 2084A0401X 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:
- 101YA0400X Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers)
- 103TA0400X Addiction (Substance Use Disorder) Psychologist (Behavioral Health & Social Service Providers)
- 125Q00000X Oral Medicine Dentistry (Dental Providers)
- 163WA0400X Addiction (Substance Use Disorder) Registered Nurse (Nursing Service Providers)
- 163WC0200X Critical Care Medicine Registered Nurse (Nursing Service Providers)
- 173000000X Legal Medicine (Other Service Providers)
Find providers with 2084A0401X
Using 2084A0401X
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.