Quick answers
- Which hospitals does Derek A. Irwin work at?
- Medicare's official clinician data lists Derek A. Irwin at 4 hospitals: INTEGRIS Baptist Medical Center, Inc, INTEGRIS Canadian Valley Hospital, Norman Regional and O U Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Derek A. Irwin see patients?
- Medicare's clinician data lists 3 practice locations, including Norman, OK and Oklahoma City, OK. Call before your visit to confirm the address.
- What is Derek A. Irwin's specialty?
- Medicare lists Pathology as the primary specialty.
- Does Derek A. Irwin accept Medicare assignment?
- Yes. Medicare's clinician data says Derek A. Irwin accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Derek A. Irwin?
- (405) 515-1000, as listed in official Medicare / NPI Registry data.
- What is Derek A. Irwin's NPI number?
- 1184603300. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Derek A. Irwin works
Medicare's Facility Affiliation Data lists Derek A. Irwin at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- INTEGRIS Baptist Medical Center, IncOklahoma City, OK · Acute Care Hospital · CCN 370028
- INTEGRIS Canadian Valley HospitalYukon, OK · Acute Care Hospital · CCN 370211
- Norman RegionalNorman, OK · Acute Care Hospital · CCN 370008
- O U Medical CenterOklahoma City, OK · Acute Care Hospital · CCN 370093
Practice locations
Addresses where Derek A. Irwin is enrolled with Medicare (CMS data updated 2026-10-02).
- 3300 Healthplex PkwyNorman, OK 73072 (405) 515‑1000
- 3300 NW ExpresswayOklahoma City, OK 73112 (405) 842‑2061
- 4401 S Western AveOklahoma City, OK 73109 (405) 636‑7251
Group practices
Medicare enrollment lists Derek A. Irwin as a member of these groups (CMS data updated 2026-10-02).
- Diagnostic Pathology Services, Inc.9 clinicians in the group
- Pathology Consultation Services Inc5 clinicians in the group
Specialties
- Pathologyprimary
Other pathologists in Norman
Clinicians with the same Medicare primary specialty in Norman, OK — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Oklahoma College Of Medicine |
| Graduation year | 1995 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1184603300 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians