Quick answers
- Which hospitals does Mark P. Postacchini work at?
- Medicare's official clinician data lists Mark P. Postacchini at 2 hospitals: Banner - University Medical Center Phoenix and Banner Estrella Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark P. Postacchini see patients?
- Medicare's clinician data lists 2 practice locations, including Phoenix, AZ and Mesa, AZ. Call before your visit to confirm the address.
- What is Mark P. Postacchini's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Mark P. Postacchini accept Medicare assignment?
- Yes. Medicare's clinician data says Mark P. Postacchini 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 Mark P. Postacchini?
- (602) 839-2000, as listed in official Medicare / NPI Registry data.
- What is Mark P. Postacchini's NPI number?
- 1255620019. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mark P. Postacchini works
Medicare's Facility Affiliation Data lists Mark P. Postacchini at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Banner - University Medical Center PhoenixPhoenix, AZ · Acute Care Hospital · CCN 030002
- Banner Estrella Medical CenterPhoenix, AZ · Acute Care Hospital · CCN 030115
Practice locations
Addresses where Mark P. Postacchini is enrolled with Medicare (CMS data updated 2026-10-02).
- 1111 E McDowell RdPhoenix, AZ 85006 (602) 839‑2000
- 6644 E Baywood AveMesa, AZ 85206 (480) 321‑2000
Group practices
Medicare enrollment lists Mark P. Postacchini as a member of these groups (CMS data updated 2026-10-02).
- Banner Hospital Based Physicians Arizona LLC637 clinicians in the group
- Banner - University Hospital Based Physicians LLC339 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 | 2010 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1255620019 |
| 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