Quick answers
- Which hospitals does Grant B. Oakley work at?
- Medicare's official clinician data lists Grant B. Oakley at 1 hospital: MaineHealth Maine Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Grant B. Oakley see patients?
- Medicare's clinician data lists 2 practice locations, including Biddeford, ME and Portland, ME. Call before your visit to confirm the address.
- What is Grant B. Oakley's specialty?
- Medicare lists Nephrology as the primary specialty.
- Does Grant B. Oakley accept Medicare assignment?
- Yes. Medicare's clinician data says Grant B. Oakley 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 Grant B. Oakley offer telehealth?
- Medicare's clinician data says Grant B. Oakley offers telehealth services. Ask the office which visits can be done by video or phone.
- What is Grant B. Oakley's NPI number?
- 1679927537. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Grant B. Oakley works
Medicare's Facility Affiliation Data lists Grant B. Oakley at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- MaineHealth Maine Medical CenterPortland, ME · Acute Care Hospital · CCN 200009
Practice locations
Addresses where Grant B. Oakley is enrolled with Medicare (CMS data updated 2026-10-02).
- 1 Medical Ctr DrBiddeford, ME 04005
- 22 Bramhall StPortland, ME 04102
Group practices
Medicare enrollment lists Grant B. Oakley as a member of this group (CMS data updated 2026-10-02).
- MaineHealth2,633 clinicians in the group
Specialties
- Nephrologyprimary
Other nephrologists in Biddeford
Clinicians with the same Medicare primary specialty in Biddeford, ME — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Lake Erie College Of Osteopathic Medicine, Erie |
| Graduation year | 2016 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1679927537 |
| 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