Antonio H. Fontelonga, MD

Medicare activity in 2024

Official CMS public-use data for Antonio H. Fontelonga, 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. Injection, dexamethasone sodium phosphate, 1 mg (J1100)615 services
2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)438 services
3. Insertion of needle into vein for collection of blood sample (36415)328 services
4. Injection of additional new drug or substance into vein (96375)288 services
5. Injection of drug or substance under skin or into muscle (96372)226 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%
• Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)59%
• Arthritis43%
• Diabetes36%
• Chronic kidney disease36%

Hospitals where Antonio H. Fontelonga works

Medicare's Facility Affiliation Data lists Antonio H. Fontelonga 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.

• Yuma Regional Medical CenterYuma, AZ · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 030013

Practice locations

Addresses where Antonio H. Fontelonga is enrolled with Medicare (CMS data updated October 2, 2026).

• 2926 N Civic Ctr PlzScottsdale, AZ 85251 (480) 614‑6300

Group practices

Medicare enrollment lists Antonio H. Fontelonga as a member of this group (CMS data updated October 2, 2026).

• Gordon Grado MD Inc5 clinicians in the group

Specialties

• Hematology/Oncologyprimary

Find other Hematology/Oncology doctors in Arizona →

Other hematologist-oncologists in Scottsdale

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

• Wishwdeep S. Dhillon, MD
• Antonious Hazim, MD
• Shannon P. Fortin Ensign, MD
• Kenneth H. Barker, MD
• Michael S. Gordon, MD
• Brendan F. Curley, DO
• Vinicius Ernani
• Arun K. Singavi, MD

All hematologist-oncologists in Scottsdale →

Other clinicians in Gordon Grado MD Inc

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

• Richard P. Levy, MD
• Gordon L. Grado, MD
• Robert C. O Laughlin, MD

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