Dr. William Devon Mcmullen, DC
Dr. William Devon Mcmullen is a Chiropractor provider (Chiropractor) practicing in Watertown, SD, registered in the NPPES registry with NPI 1154911535 since 2021. The credential DC stands for Doctor of Chiropractic. Practices at Northern Peak Chiropractic LLC (listed at the same practice address in NPPES).
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1154911535 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. William Devon Mcmullen |
| Credential | DC |
| Sex | Male |
| Practice address | 600 5TH ST SE STE 2, Watertown, SD, 57201 |
| Phone | 6058780167 |
| Enumeration date | 2021-01-20 |
| Last updated in NPPES | 2021-01-20 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 111N00000X | Chiropractor | Primary | 1389 | SD |
DC — Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders. About the DC credential
Copy-ready billing details
Provider: William Mcmullen, DC NPI: 1154911535 Taxonomy: 111N00000X (Chiropractor) Address: 600 5TH ST SE STE 2, Watertown, SD, 57201
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1235729617 | Northern Peak Chiropractic LLC | Organization | Chiropractor | Watertown, SD |
| 1821688219 | Bethany Mcmullen | Individual | Chiropractor | Watertown, SD |
| 1053196998 | Sierra Ohm | Individual | Chiropractor | Watertown, SD |
Verify this record
Cross-check NPI 1154911535 against the authoritative CMS record: view Dr. William Devon Mcmullen 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
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2021-01-20.