Quick answers
- Which hospitals does John W. Ervin work at?
- Medicare's official clinician data lists John W. Ervin at 1 hospital: INTEGRIS Grove Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John W. Ervin see patients?
- Medicare's clinician data lists 1 practice location in Grove, OK. Call before your visit to confirm the address.
- What is John W. Ervin's specialty?
- Medicare lists Obstetrics/Gynecology as the primary specialty.
- Does John W. Ervin accept Medicare assignment?
- Yes. Medicare's clinician data says John W. Ervin 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 John W. Ervin?
- (918) 786-2720, as listed in official Medicare / NPI Registry data.
- What is John W. Ervin's NPI number?
- 1629061213. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John W. Ervin works
Medicare's Facility Affiliation Data lists John W. Ervin at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- INTEGRIS Grove HospitalGrove, OK · Acute Care Hospital · CCN 370113
Practice locations
Addresses where John W. Ervin is enrolled with Medicare (CMS data updated 2026-10-02).
- 900 E 13th St, 205 INTEGRIS Grand Lake Ob/gynGrove, OK 74344 (918) 786‑2720
Group practices
Medicare enrollment lists John W. Ervin as a member of this group (CMS data updated 2026-10-02).
- INTEGRIS Ambulatory Care Corporation685 clinicians in the group
Specialties
- Obstetrics/Gynecologyprimary
Other OB-GYNs in Oklahoma
Clinicians with the same Medicare primary specialty in Oklahoma — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Ponce School Of Medicine |
| Graduation year | 1999 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1629061213 |
| 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