Quick answers
- Does Mary K. Harper accept Medicare assignment?
- Yes. Medicare's clinician data says Mary K. Harper accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Mary K. Harper see?
- In 2024, CMS data shows 677 Original Medicare patients and 763 services for Mary K. Harper. This counts Original Medicare only and measures volume, not quality.
- What is Mary K. Harper's NPI number?
- 1518297753. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Mary K. Harper, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 677 |
|---|---|
| Services billed to Medicare | 763 |
| Different services or procedures | 22 |
| Participating Medicare provider | Yes |
| Average age of these patients | 78 |
Most frequent services
- Emergency department visit with high level of medical decision making (99285)362 services
- Emergency department visit with moderate level of medical decision making (99284)139 services
- Critical care, first 30-74 minutes (99291)131 services
- Hospital discharge day management, 30 minutes or less (99238)23 services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)17 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Arthritis54%
- Ischemic heart disease49%
- Chronic kidney disease43%
- Atrial fibrillation41%
Hospitals where Mary K. Harper works
Medicare's Facility Affiliation Data lists Mary K. Harper at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Chinle Comprehensive Health Care FacilityChinle, AZ · Acute Care Hospital · Emergency services: listed by Medicare · CCN 030084
- Honor Health John C. Lincoln Medical CenterPhoenix, AZ · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 030014
- HonorHealth Deer Valley Medical CenterPhoenix, AZ · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 030092
- HonorHealth Four Peaks Medical CenterMesa, AZ · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 030121
- HonorHealth Sonoran Crossing Medical CenterPhoenix, AZ · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 030146
Practice locations
Addresses where Mary K. Harper is enrolled with Medicare (CMS data updated October 2, 2026).
- 1301 S Crimson RdMesa, AZ 85209 (480) 358‑6100
- 16575 W Waddell RdSurprise, AZ 85388 (954) 939‑5000
- 19829 N 27th AvePhoenix, AZ 85027 (954) 939‑5000
- 250 E Dunlap AvePhoenix, AZ 85020 (954) 939‑5000
- 33400 N 32nd AvePhoenix, AZ 85085 (954) 939‑5000
Group practices
Medicare enrollment lists Mary K. Harper as a member of these groups (CMS data updated October 2, 2026).
- Emcare - PNX Emergency Physicians LLC69 clinicians in the group
- Loop 101 Emergency Physicians LLC53 clinicians in the group
- 303 Emergency Physicians PLLC45 clinicians in the group
- Usacs Emergency Medicine of Arizona LLC35 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Mesa
Clinicians with the same Medicare primary specialty in Mesa, AZ — not a recommendation.
Other clinicians in Emcare - PNX Emergency Physicians LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 2008 (18 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1518297753 |
| 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 October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- 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