Quick answers
- Which hospitals does Garrett Klaassen work at?
- Medicare's official clinician data lists Garrett Klaassen at 2 hospitals: Mercy Hospital Oklahoma City, Inc and O U Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Garrett Klaassen see patients?
- Medicare's clinician data lists 4 practice locations, including Oklahoma City, OK. Call before your visit to confirm the address.
- What is Garrett Klaassen's specialty?
- Medicare lists Physician Assistant as the primary specialty.
- Does Garrett Klaassen accept Medicare assignment?
- Yes. Medicare's clinician data says Garrett Klaassen 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.
- Does Garrett Klaassen offer telehealth?
- Medicare's clinician data says Garrett Klaassen offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Garrett Klaassen?
- (405) 271-4700, as listed in official Medicare / NPI Registry data.
- What is Garrett Klaassen's NPI number?
- 1710652540. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Garrett Klaassen works
Medicare's Facility Affiliation Data lists Garrett Klaassen at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mercy Hospital Oklahoma City, IncOklahoma City, OK · Acute Care Hospital · CCN 370013
- O U Medical CenterOklahoma City, OK · Acute Care Hospital · CCN 370093
Practice locations
Addresses where Garrett Klaassen is enrolled with Medicare (CMS data updated 2026-10-02).
- 711 Stanton L Young BlvdOklahoma City, OK 73104 (405) 271‑4700
- 800 NE 10th St, Ouhp Stephenson Cancer CenterOklahoma City, OK 73104 (405) 271‑1112
- 825 NE 10th StOklahoma City, OK 73104 (405) 271‑4700
- 900 NE 10th St, Ouhp Family MedicineOklahoma City, OK 73104 (572) 244‑0065
Group practices
Medicare enrollment lists Garrett Klaassen as a member of this group (CMS data updated 2026-10-02).
- OU Health Partners Inc1,184 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Oklahoma City
Clinicians with the same Medicare primary specialty in Oklahoma City, OK — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2023 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1710652540 |
| 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