Quick answers
- Does Maressa M. Alejandro-Reyes accept Medicare assignment?
- Yes. Medicare's clinician data says Maressa M. Alejandro-Reyes 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 Maressa M. Alejandro-Reyes see?
- In 2024, CMS data shows 59 Original Medicare patients and 7,630 services for Maressa M. Alejandro-Reyes. This counts Original Medicare only and measures volume, not quality.
- What is Maressa M. Alejandro-Reyes's NPI number?
- 1750328969. 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 Maressa M. Alejandro-Reyes, 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 | 59 |
|---|---|
| Services billed to Medicare | 7,630 |
| Different services or procedures | 34 |
| Participating Medicare provider | Yes |
| Average age of these patients | 70 |
Most frequent services
- Professional service for preparation and provision of single-dose vial of allergen (95144)6,270 services
- Test for allergy using allergenic extract (95004)721 services
- Professional service for preparation and provision of 1 or more antigens (95165)260 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)165 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)40 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 cholesterol75%
- High blood pressure53%
- Arthritis46%
- Anxiety34%
- Depression29%
- Chronic kidney disease20%
Hospitals where Maressa M. Alejandro-Reyes works
Medicare's Facility Affiliation Data lists Maressa M. Alejandro-Reyes 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.
- Honor Health John C. Lincoln Medical CenterPhoenix, AZ · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 030014
- St Josephs Hospital and Medical CenterPhoenix, AZ · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 030024
Practice locations
Addresses where Maressa M. Alejandro-Reyes is enrolled with Medicare (CMS data updated October 2, 2026).
- 1616 E Indian School Rd, Suite 135Phoenix, AZ 85016 (480) 900‑9355
- 1653 E McMurray Blvd, Suite 144Casa Grande, AZ 85122 (520) 836‑8644
- 5900 N Granite Reef Rd, Suite 102Scottsdale, AZ 85250 (602) 703‑7275
Group practices
Medicare enrollment lists Maressa M. Alejandro-Reyes as a member of these groups (CMS data updated October 2, 2026).
- I Am Wellness AZ LLC40 clinicians in the group
- Progressive Pain Management Inc37 clinicians in the group
- Fusion Medical Care PLLC2 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Phoenix
Clinicians with the same Medicare primary specialty in Phoenix, AZ — not a recommendation.
Other clinicians in I Am Wellness AZ LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Ponce School Of Medicine |
| Graduation year | 1994 (32 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1750328969 |
| 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