Quick answers
- Where does Mark I. Feldman see patients?
- Medicare's clinician data lists 2 practice locations, including Tucson, AZ. Call before your visit to confirm the address.
- What is Mark I. Feldman's specialty?
- Medicare lists Cardiovascular Disease (Cardiology) as the primary specialty, and also Internal Medicine.
- Does Mark I. Feldman accept Medicare assignment?
- Medicare's clinician data says Mark I. Feldman may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is the phone number for Mark I. Feldman?
- (520) 327-3644, as listed in official Medicare / NPI Registry data.
- What is Mark I. Feldman's NPI number?
- 1356334957. 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 Mark I. Feldman is enrolled with Medicare (CMS data updated 2026-10-02).
- 2990 N Campbell Ave, Suite 210Tucson, AZ 85719 (520) 327‑3644
- 3801 N Campbell Ave, Suite CTucson, AZ 85719
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in Arizona →
Other cardiologists in Tucson
Clinicians with the same Medicare primary specialty in Tucson, AZ — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1967 |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1356334957 |
| 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