Dr. Mark Stephen Tierney, D.C.
Dr. Mark Stephen Tierney is a Orthopedic Chiropractor provider (Chiropractor) practicing in Reading, MA, registered in the NPPES registry with NPI 1588754378 since 2006. The credential DC stands for Doctor of Chiropractic. Practices at Tierney Chiropractic (listed at the same practice address in NPPES).
✓ Active NPI ✓ Valid NPI checksum Sole proprietor
| NPI | 1588754378 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. Mark Stephen Tierney |
| Credential | D.C. |
| Sex | Male |
| Practice address | Reading, MA, 01867 |
| Phone | 7819423660 |
| Fax | 7819421866 |
| Enumeration date | 2006-10-13 |
| Last updated in NPPES | 2024-10-07 |
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 | 1909 | MA |
DC — Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders. About the DC credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 1611461 | Medicaid | MA | — |
Copy-ready billing details
Provider: Mark Tierney, D.C. NPI: 1588754378 Taxonomy: 111NX0800X (Orthopedic Chiropractor) Address: Reading, MA, 01867
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1306354246 | Tierney Chiropractic | Organization | Orthopedic Chiropractor | Reading, MA |
Verify this record
Cross-check NPI 1588754378 against the authoritative CMS record: view Dr. Mark Stephen Tierney 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
What is the NPI number for Mark Tierney?
Where does Mark Tierney practice?
Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2024-10-07.