Quick answers
- Which hospitals does Robert M. Holbrook work at?
- Medicare's official clinician data lists Robert M. Holbrook at 2 hospitals: Norman Regional and Purcell Municipal Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Robert M. Holbrook see patients?
- Medicare's clinician data lists 1 practice location in Norman, OK. Call before your visit to confirm the address.
- What is Robert M. Holbrook's specialty?
- Medicare lists Gastroenterology as the primary specialty, and also Internal Medicine.
- Does Robert M. Holbrook accept Medicare assignment?
- Yes. Medicare's clinician data says Robert M. Holbrook 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 Robert M. Holbrook?
- (405) 366-8619, as listed in official Medicare / NPI Registry data.
- What is Robert M. Holbrook's NPI number?
- 1053352054. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Robert M. Holbrook works
Medicare's Facility Affiliation Data lists Robert M. Holbrook at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Norman RegionalNorman, OK · Acute Care Hospital · CCN 370008
- Purcell Municipal HospitalPurcell, OK · Acute Care Hospital · CCN 370158
Practice locations
Addresses where Robert M. Holbrook is enrolled with Medicare (CMS data updated 2026-10-02).
- 1515 N Porter Ave, Suite 200Norman, OK 73071 (405) 366‑8619
Group practices
Medicare enrollment lists Robert M. Holbrook as a member of this group (CMS data updated 2026-10-02).
- Charles L. Lackey MD, PC3 clinicians in the group
Specialties
- Gastroenterologyprimary
- Internal Medicinealso
Other gastroenterologists 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 | 2000 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1053352054 |
| 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