Quick answers
- Which hospitals does Mark Lacy work at?
- Medicare's official clinician data lists Mark Lacy at 1 hospital: Yavapai Regional Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark Lacy see patients?
- Medicare's clinician data lists 1 practice location in Prescott, AZ. Call before your visit to confirm the address.
- What is Mark Lacy's specialty?
- Medicare lists Infectious Disease as the primary specialty, and also Internal Medicine.
- Does Mark Lacy accept Medicare assignment?
- Yes. Medicare's clinician data says Mark Lacy 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 Lacy?
- (928) 708-4300, as listed in official Medicare / NPI Registry data.
- What is Mark Lacy's NPI number?
- 1134177215. 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 Lacy works
Medicare's Facility Affiliation Data lists Mark Lacy at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Yavapai Regional Medical CenterPrescott, AZ · Acute Care Hospital · CCN 030012
Practice locations
Addresses where Mark Lacy is enrolled with Medicare (CMS data updated 2026-10-02).
- 300 N Lee BlvdPrescott, AZ 86301 (928) 708‑4300
Group practices
Medicare enrollment lists Mark Lacy as a member of this group (CMS data updated 2026-10-02).
- Yavapai Regional Medical Center Physician Care LLC124 clinicians in the group
Specialties
- Infectious Diseaseprimary
- Internal Medicinealso
Other infectious disease doctors in Arizona
Clinicians with the same Medicare primary specialty in Arizona — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1983 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1134177215 |
| 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