United States · Provider taxonomy
NUCC taxonomy code lookup.
Check that a Health Care Provider Taxonomy code has the 10-character layout, and search the official NUCC list by name or code after loading the file NUCC publishes, entirely in your browser.
The rule in one line: 10 characters. In the current NUCC list (version 26.1) every code is three digits, six letters or digits, then X. Example shape: 207Q00000X.
How to use the NUCC taxonomy lookup
- Type a 10-character code, or words such as a specialty, into the box.
- Optionally choose the NUCC taxonomy CSV you downloaded, so the page can search it.
- Press Search and read the matching codes, or the rule a code breaks.
Your file stays on your device
The search runs in your browser, inside an isolated frame on this page that has no network access. The file you choose is read locally and is never uploaded to TNAADO or anyone else, and nothing is stored. The advertising on this page sits outside the frame and cannot see what you enter.
What a taxonomy code is
The National Uniform Claim Committee (NUCC) maintains the Health Care Provider Taxonomy, a code set that classifies the type and specialty of a health care provider. NUCC describes each entry as a unique alphanumeric code, ten characters in length, and says the code set has three levels: Provider Grouping, Classification and Area of Specialization. The codes show up wherever a provider's specialty has to be named in a claim, a directory or an enrollment record, usually next to the provider's NPI.
What the current list looks like
We read the version 26.1 file, released 7/1/26, to see what is in it. It has 883 codes in 29 groupings, and 642 of the codes name an area of specialization while 241 stop at the classification. The file's Section column marks 698 codes as Individual and 185 as Non-Individual. Every one of the 883 codes is exactly ten characters, begins with three digits and ends in X, and that is the pattern the checker above applies. NUCC's page does not state those last two points as rules, so they describe this version, not every future one.
Five codes, quoted from that file with their grouping and classification:
207Q00000X: Allopathic & Osteopathic Physicians, Family Medicine.208D00000X: Allopathic & Osteopathic Physicians, General Practice.207R00000X: Allopathic & Osteopathic Physicians, Internal Medicine.363L00000X: Physician Assistants & Advanced Practice Nursing Providers, Nurse Practitioner.1223G0001X: Dental Providers, Dentist, General Practice.
Provider taxonomy codes are © the American Medical Association and maintained by NUCC.
How many codes are in each grouping
Counts of codes per grouping in version 26.1, taken from the file's Grouping column. Physicians dominate: one grouping holds more than a quarter of all codes.
| Grouping | Codes |
|---|---|
| Allopathic & Osteopathic Physicians | 238 |
| Respiratory, Developmental, Rehabilitative and Restorative Service Providers | 82 |
| Technologists, Technicians & Other Technical Service Providers | 65 |
| Ambulatory Health Care Facilities | 63 |
| Nursing Service Providers | 59 |
| Physician Assistants & Advanced Practice Nursing Providers | 58 |
| Behavioral Health & Social Service Providers | 40 |
| Other Service Providers | 38 |
| Suppliers | 31 |
| Dental Providers | 20 |
| Pharmacy Service Providers | 19 |
| Hospitals | 18 |
| Eye and Vision Services Providers | 17 |
| Transportation Services | 17 |
| Agencies | 15 |
| Dietary & Nutritional Service Providers | 13 |
| Nursing & Custodial Care Facilities | 13 |
| Nursing Service Related Providers | 13 |
| Chiropractic Providers | 12 |
| Podiatric Medicine & Surgery Service Providers | 9 |
| Speech, Language and Hearing Service Providers | 9 |
| Residential Treatment Facilities | 8 |
| Emergency Medical Service Providers | 5 |
| Hospital Units | 5 |
| Respite Care Facility | 5 |
| Laboratories | 4 |
| Managed Care Organizations | 4 |
| Group | 2 |
| Student, Health Care | 1 |
How to use the tool
- Type a code into the box and press Search. Without a file loaded, the page tells you whether the layout is right.
- Download the CSV from NUCC (link under Sources) and choose it with the file picker. The page parses it in your browser.
- Search by code or by words from the grouping, classification or specialization, for example nurse practitioner or 207Q. Every word you type has to appear.
Why you load the file yourself
NUCC's copyright line reads "Copyright 2026 American Medical Association". The CSV page says a license must be obtained for commercial use, including sales or licensing, and the permission form grants a non-exclusive, royalty-free right to use and distribute the taxonomy in products in the United States on conditions: keep the AMA's notices and attribution, do not modify it or make derivative works, and do not use the names of the AMA or NUCC to promote a product. This site has not accepted a redistribution license, so it does not host a copy. That also means nothing on this page can be out of date: it searches the version you give it.
Edge cases and common mistakes
- Confusing the code with the NPI. The NPI identifies the provider; the taxonomy code says what kind of provider. Facilities also have CCNs.
- Using a classification name where a code is required. Forms want the ten-character code, not "Family Medicine".
- Lowercase or spaces. This page upper-cases and removes spaces and hyphens; many systems do not.
- An old version. A code that appears in an older file may not be in the version a payer requires. Search the file the payer names.
- Zero versus the letter O. A code such as 207Q00000X is full of zeros, and a letter O in their place makes a code that is not in the list.
Other US provider and establishment identifiers on this site include the DEA number validator, the Medicare MBI validator and the FDA FEI validator.
Who this is for
Billing staff completing claims or enrollment forms, credentialing coordinators, health data analysts cleaning provider files, and developers who need to know whether a stored value could be a taxonomy code before they look it up.
What this does not cover
- Which taxonomy code a particular provider should use, or which one a payer accepts.
- NPI registration, state licensure or credentialing.
- Deactivated or changed codes between versions; check NUCC's release notes.
- Any list other than the one you load.
Frequently asked questions
How many characters is a NUCC taxonomy code?
Ten. NUCC describes the Health Care Provider Taxonomy code as a unique alphanumeric code, ten characters in length.
Do all taxonomy codes end in X?
In version 26.1 of the NUCC list, yes: all 883 codes end in X and all begin with three digits. NUCC's page describes the code only as ten alphanumeric characters, so treat the X as an observation about the current list.
What are the three levels of the taxonomy?
NUCC says the code set has three levels: Provider Grouping, Classification and Area of Specialization. In the CSV, the Grouping column is the first level, Classification the second and Specialization the third. Some codes stop at the classification.
Where do I download the official list?
NUCC publishes the code set as a CSV on its Provider Taxonomy pages. Version 26.1, released 7/1/26, was the current file when we checked. The Sources section links to it.
Why do I have to load the file myself?
The code set is copyrighted by the American Medical Association and NUCC grants permission to use and distribute it under conditions, including attribution, no modification and a license for commercial products. This site has not taken on a redistribution license, so it does not embed the list. Loading your own copy keeps the data with its owner and works offline.
Is a taxonomy code the same as an NPI or a specialty?
No. The NPI is the provider's identifier. A taxonomy code describes the type or specialty of provider and is reported alongside the NPI in many healthcare transactions. One provider can have more than one.
Does a valid-looking code mean it is current?
No. The page checks the layout, and when you load the CSV it tells you whether the code is in that file. NUCC publishes numbered versions, so use the version your payer or clearinghouse names.
Is the file I load uploaded anywhere?
No. It is read and parsed in your browser and nothing is sent or stored.
Sources
- NUCC, Health Care Provider Taxonomy (code structure and copyright statement) (retrieved 2026-10)
- NUCC, Provider Taxonomy CSV page (version 26.1, 7/1/26; license note) (retrieved 2026-10)
- NUCC, nucc_taxonomy_261.csv (the file this page expects) (retrieved 2026-10)
Shape only
A correctly formatted code is not proof that it is in the current NUCC list, or that it is the right code for a provider or accepted by a payer. Use the official list and the payer's instructions. This page is general information, not billing or compliance advice.