Quick answers
- Which hospitals does Demsas G. Abay work at?
- Medicare's official clinician data lists Demsas G. Abay at 3 hospitals: Abrazo Arrowhead Hospital, Abrazo Central Campus and Summit Healthcare Regional Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Demsas G. Abay see patients?
- Medicare's clinician data lists 1 practice location in Phoenix, AZ. Call before your visit to confirm the address.
- What is Demsas G. Abay's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Demsas G. Abay accept Medicare assignment?
- Yes. Medicare's clinician data says Demsas G. Abay 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 Demsas G. Abay?
- (602) 532-1000, as listed in official Medicare / NPI Registry data.
- What is Demsas G. Abay's NPI number?
- 1720312390. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Demsas G. Abay works
Medicare's Facility Affiliation Data lists Demsas G. Abay at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Abrazo Arrowhead HospitalGlendale, AZ · Acute Care Hospital · CCN 030094
- Abrazo Central CampusPhoenix, AZ · Acute Care Hospital · CCN 030030
- Summit Healthcare Regional Medical CenterShow Low, AZ · Acute Care Hospital · CCN 030062
Practice locations
Addresses where Demsas G. Abay is enrolled with Medicare (CMS data updated 2026-10-02).
- 1930 E Thomas RdPhoenix, AZ 85016 (602) 532‑1000
Group practices
Medicare enrollment lists Demsas G. Abay as a member of this group (CMS data updated 2026-10-02).
- Dvma LLC55 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Phoenix
Clinicians with the same Medicare primary specialty in Phoenix, AZ — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1998 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1720312390 |
| 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