Dr. Brian Clay Bak, DO
Dr. Brian Clay Bak is a Chiropractor provider (Chiropractor) practicing in Watertown, SD, registered in the NPPES registry with NPI 1861532913 since 2007. The credential DO stands for Doctor of Osteopathic Medicine. Practices at Bak Chiropractic, P.C. (listed at the same practice address in NPPES).
✓ Active NPI ✓ Valid NPI checksum Sole proprietor
| NPI | 1861532913 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. Brian Clay Bak |
| Credential | DO |
| Sex | Male |
| Practice address | Watertown, SD, 57201 |
| Phone | 6058824252 |
| Enumeration date | 2007-02-07 |
| Last updated in NPPES | 2007-07-08 |
Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 111N00000X | Chiropractor | Primary | 687 | SD |
DO — Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 7600120 | Medicaid | SD | — |
Copy-ready billing details
Provider: Brian Bak, DO NPI: 1861532913 Taxonomy: 111N00000X (Chiropractor) Address: Watertown, SD, 57201
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1629410345 | Bak Chiropractic, P.C. | Organization | Health Service Clinic/Center | Watertown, SD |
Verify this record
Cross-check NPI 1861532913 against the authoritative CMS record: view Dr. Brian Clay Bak on the official NPPES registry .
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.
Frequently asked questions
Is NPI 1861532913 active?
How do I verify Brian Bak's NPI record?
Source: CMS NPPES (public data). Snapshot 2026-07-10. Provider record last updated 2007-07-08.