Mary Ann Atia, MD

Medicare activity in 2024

Official CMS public-use data for Mary Ann Atia, 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.

Most frequent services

1. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)131 services
2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)115 services
3. Biopsy of large bowel using a flexible endoscope (45380)92 services
4. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)71 services
5. Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)54 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 pressure63%
• Arthritis54%
• Anxiety29%
• Ischemic heart disease23%
• Depression23%

Hospitals where Mary Ann Atia works

Medicare's Facility Affiliation Data lists Mary Ann Atia 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.

• Banner Desert Medical CenterMesa, AZ · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 030065

Practice locations

Addresses where Mary Ann Atia is enrolled with Medicare (CMS data updated October 2, 2026).

• 20033 N 19th Ave, Suite 106Phoenix, AZ 85027 (602) 242‑2555
• 5823 W Eugie Ave, Suite AGlendale, AZ 85304 (602) 843‑1265

Group practices

Medicare enrollment lists Mary Ann Atia as a member of this group (CMS data updated October 2, 2026).

• Arizona Digestive Health PC136 clinicians in the group

Specialties

• Gastroenterologyprimary

Find other Gastroenterology doctors in Arizona →

Other gastroenterologists in Phoenix

Clinicians with the same Medicare primary specialty in Phoenix, AZ — not a recommendation.

• Lynna Alnimer, MD
• Mohanad T. Al-Qaisi, MD
• Joseph Woolley, DO
• Gary H. Silber, MD
• Dana I. Williams, MD
• Ronald J. Hauptman, MD
• Bradford C. Gelzayd, MD
• Michael B. Fallon, MD

All gastroenterologists in Phoenix →

Other clinicians in Arizona Digestive Health PC

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

• Daniel A. Meline, MD
• Rachael E. Brown, PA
• Justin Campagna, MD
• Lisa A. Cerilli, MD
• Mark D. Gulinson, MD
• Lauren R. Hathorn, NP

Clinician information

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

1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
6. Medicare Care Compare — official Medicare tool to look up clinicians