Quick answers
- Where does John S. Graham see patients?
- Medicare's clinician data lists 1 practice location in Glendale, AZ. Call before your visit to confirm the address.
- What is John S. Graham's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does John S. Graham accept Medicare assignment?
- Yes. Medicare's clinician data says John S. Graham 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 John S. Graham offer telehealth?
- Medicare's clinician data says John S. Graham offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for John S. Graham?
- (888) 698-6727, as listed in official Medicare / NPI Registry data.
- What is John S. Graham's NPI number?
- 1336137538. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where John S. Graham is enrolled with Medicare (CMS data updated 2026-10-02).
- 5620 W Thunderbird Rd, Suite F1Glendale, AZ 85306 (888) 698‑6727
Group practices
Medicare enrollment lists John S. Graham as a member of this group (CMS data updated 2026-10-02).
- Summit Medical Group Arizona LLC158 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Glendale
Clinicians with the same Medicare primary specialty in Glendale, AZ — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Pittsburgh School Of Medicine |
| Graduation year | 1992 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1336137538 |
| 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
- 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