Nisar Ahmed, MD

Medicare activity in 2024

Official CMS public-use data for Nisar Ahmed, 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. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)277 services
2. Hospital discharge day management, more than 30 minutes (99239)174 services
3. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)132 services
4. Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)18 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%
• Arthritis75%
• Chronic kidney disease45%
• Ischemic heart disease44%
• Diabetes41%

Hospitals where Nisar Ahmed works

Medicare's Facility Affiliation Data lists Nisar Ahmed 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.

• Arizona Spine and Joint HospitalMesa, AZ · Acute Care Hospital · Emergency services: not listed by Medicare · CCN 030107
• Mercy Gilbert Medical CenterGilbert, AZ · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 030119

Practice locations

Addresses where Nisar Ahmed is enrolled with Medicare (CMS data updated October 2, 2026).

• 475 S Dobson RdChandler, AZ 85224 (888) 488‑7640

Group practices

Medicare enrollment lists Nisar Ahmed as a member of this group (CMS data updated October 2, 2026).

• Pioneer Hospitalists, PLLC50 clinicians in the group

Specialties

• Internal Medicineprimary

Find other Internal Medicine doctors in Arizona →

Other internal medicine doctors in Chandler

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

• Sara Chauhan, MD
• Mustafa M. Al-Damha, MD
• Deepti Bahl, MD
• Salina K. Faidhalla, MD
• Usha K. Nagin, MD
• Anne Borik, MD
• Thanh V. Cao, MD
• Abdullah Mohamed Niyas, MD

All internal medicine doctors in Chandler →

Other clinicians in Pioneer Hospitalists, PLLC

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

• Mustafa M. Al-Damha, MD
• Gunjan Choudhary, MD
• Ranae D. Antoine, MD
• Ashley K. Johnson, PA
• Afshin Deyhimpanah, MD
• Mohammad Shaikh, 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