Quick answers
- Where does Mark M. Lessner see patients?
- Medicare's clinician data lists 4 practice locations, including San Luis, AZ, Somerton, AZ and Parker, AZ. Call before your visit to confirm the address.
- What is Mark M. Lessner's specialty?
- Medicare lists Pediatric Medicine as the primary specialty.
- Does Mark M. Lessner accept Medicare assignment?
- Yes. Medicare's clinician data says Mark M. Lessner 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 M. Lessner?
- (928) 550-5514, as listed in official Medicare / NPI Registry data.
- What is Mark M. Lessner's NPI number?
- 1497857999. 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 M. Lessner is enrolled with Medicare (CMS data updated 2026-10-02).
- 1233 N Main St, Suite 1aSan Luis, AZ 85336 (928) 550‑5514
- 1896 E Babbit LnSan Luis, AZ 85336 (928) 722‑6112
- 214 W Main StSomerton, AZ 85350 (928) 627‑1120
- 601 W Riverside DrParker, AZ 85344 (928) 256‑4110
Group practices
Medicare enrollment lists Mark M. Lessner as a member of this group (CMS data updated 2026-10-02).
- San Luis Walk-In Clinic Inc49 clinicians in the group
Specialties
- Pediatric Medicineprimary
Other pediatricians in Arizona
Clinicians with the same Medicare primary specialty in Arizona — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Arizona College Of Medicine |
| Graduation year | 1975 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1497857999 |
| 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