Quick answers
- Which hospitals does Jack W. Grinnan work at?
- Medicare's official clinician data lists Jack W. Grinnan at 4 hospitals: Banner Baywood Medical Center, Banner Gateway Medical Center, Banner Payson Medical Center and Saint Agnes Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Jack W. Grinnan see patients?
- Medicare's clinician data lists 2 practice locations, including Mesa, AZ and Baltimore, MD. Call before your visit to confirm the address.
- What is Jack W. Grinnan's specialty?
- Medicare lists Urology as the primary specialty.
- Does Jack W. Grinnan accept Medicare assignment?
- Yes. Medicare's clinician data says Jack W. Grinnan 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 Jack W. Grinnan offer telehealth?
- Medicare's clinician data says Jack W. Grinnan offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Jack W. Grinnan?
- (602) 222-1900, as listed in official Medicare / NPI Registry data.
- What is Jack W. Grinnan's NPI number?
- 1487090288. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Jack W. Grinnan works
Medicare's Facility Affiliation Data lists Jack W. Grinnan at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Banner Baywood Medical CenterMesa, AZ · Acute Care Hospital · CCN 030088
- Banner Gateway Medical CenterGilbert, AZ · Acute Care Hospital · CCN 030122
- Banner Payson Medical CenterPayson, AZ · Critical Access Hospital · CCN 031318
- Saint Agnes HospitalBaltimore, MD · Acute Care Hospital · CCN 210011
Practice locations
Addresses where Jack W. Grinnan is enrolled with Medicare (CMS data updated 2026-10-02).
- 2530 E Southern AveMesa, AZ 85204 (602) 222‑1900
- 3407 Wilkens Ave, Suite 200Baltimore, MD 21229 (410) 644‑0929
Group practices
Medicare enrollment lists Jack W. Grinnan as a member of these groups (CMS data updated 2026-10-02).
- Chesapeake Urology Associates LLC177 clinicians in the group
- Arizona Urology Specialists PLLC84 clinicians in the group
Specialties
- Urologyprimary
Other urologists in Mesa
Clinicians with the same Medicare primary specialty in Mesa, AZ — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Texas Medical School At San Antonio |
| Graduation year | 2013 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1487090288 |
| 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