Dr. Peter Terhaar, D.O.
Dr. Peter Terhaar is a Orthopaedic Surgery Physician provider (Orthopaedic Surgery) practicing in Olean, NY, registered in the NPPES registry with NPI 1184622821 since 2005. The credential DO stands for Doctor of Osteopathic Medicine.
✓ Active NPI ✓ Valid NPI checksum Sole proprietor
| NPI | 1184622821 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. Peter Terhaar |
| Credential | D.O. |
| Sex | Male |
| Practice address | Olean, NY, 14760 |
| Phone | 7163731590 |
| Fax | 7163739933 |
| Enumeration date | 2005-07-07 |
| Last updated in NPPES | 2010-04-14 |
Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 207X00000X | Orthopaedic Surgery Physician | Primary | 169205 | NY |
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 |
|---|---|---|---|
| 200043584 | Other | PA | RAILROAD MEDICARE |
| 02282828 | Medicaid | NY | — |
| 200043583 | Other | NY | RAILROAD MEDICARE |
| 0014825680007 | Medicaid | PA | — |
Copy-ready billing details
Provider: Peter Terhaar, D.O. NPI: 1184622821 Taxonomy: 207X00000X (Orthopaedic Surgery Physician) Address: Olean, NY, 14760
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1962495812 | Medical Laboratory of Olean | Organization | Clinical Medical Laboratory | Olean, NY |
| 1891734430 | Thayaparan Mathanakaran | Individual | Adult Medicine Physician | Olean, NY |
| 1164625521 | Ruth Palmquist | Individual | Mental Health Counselor | Olean, NY |
| 1508186339 | Carmella Bartimole | Individual | Mental Health Counselor | Olean, NY |
| 1104134048 | Priya Mohanty Medical Practice Pllc | Organization | Endocrinology, Diabetes & Metabolism Physician | Olean, NY |
| 1851686679 | Olean Primary Medical Care Pllc | Organization | Adult Medicine Physician | Olean, NY |
| 1508264573 | Paula Wojewoda | Individual | Mental Health Counselor | Olean, NY |
| 1598158164 | Olean Medical Group | Organization | Multi-Specialty Clinic/Center | Olean, NY |
Verify this record
Cross-check NPI 1184622821 against the authoritative CMS record: view Dr. Peter Terhaar 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 2010-04-14.