Dr. Daniel D. O'Day, D.C.
Dr. Daniel D. O'Day is a Orthopedic Chiropractor provider (Chiropractor) practicing in Worcester, MA, registered in the NPPES registry with NPI 1386667079 since 2006. The credential DC stands for Doctor of Chiropractic.
✓ Active NPI ✓ Valid NPI checksum Sole proprietor
| NPI | 1386667079 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. Daniel D. O'Day |
| Credential | D.C. |
| Sex | Male |
| Practice address | Worcester, MA, 01606 |
| Phone | 5088538400 |
| Enumeration date | 2006-07-25 |
| Last updated in NPPES | 2007-07-09 |
Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 111NX0800X | Orthopedic Chiropractor | Primary | 634 | MA |
DC — Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders. About the DC credential
Copy-ready billing details
Provider: Daniel O'Day, D.C. NPI: 1386667079 Taxonomy: 111NX0800X (Orthopedic Chiropractor) Address: Worcester, MA, 01606
Verify this record
Cross-check NPI 1386667079 against the authoritative CMS record: view Dr. Daniel D. O'Day 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 1386667079 active?
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2007-07-09.