Quick answers
- Which hospitals does Mark Simmons work at?
- Medicare's official clinician data lists Mark Simmons at 1 hospital: Northwest Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark Simmons see patients?
- Medicare's clinician data lists 6 practice locations, including Tucson, AZ and Oro Valley, AZ. Call before your visit to confirm the address.
- What is Mark Simmons's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Mark Simmons accept Medicare assignment?
- Yes. Medicare's clinician data says Mark Simmons 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 Simmons?
- (520) 989-8257, as listed in official Medicare / NPI Registry data.
- What is Mark Simmons's NPI number?
- 1811092760. 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 Simmons works
Medicare's Facility Affiliation Data lists Mark Simmons at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Northwest Medical CenterTucson, AZ · Acute Care Hospital · CCN 030085
Practice locations
Addresses where Mark Simmons is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 6; the Medicare profile lists all.
- 1218 W Irvington Rd, Suite 150Tucson, AZ 85714 (520) 989‑8257
- 1370 N Silverbell Rd, Suite 170Tucson, AZ 85745 (520) 205‑8950
- 1880 E Tangerine Rd, Suite 100Oro Valley, AZ 85755 (520) 989‑8249
- 3662 W Ina Rd, Suite 150Tucson, AZ 85741 (520) 989‑8251
- 3870 W River Rd, Suite 126Tucson, AZ 85741 (520) 219‑6616
Group practices
Medicare enrollment lists Mark Simmons as a member of this group (CMS data updated 2026-10-02).
- Northwest Urgent Care LLC69 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Tucson
Clinicians with the same Medicare primary specialty in Tucson, AZ — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1992 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1811092760 |
| 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