Diana Gilligan, MD

Medicare activity in 2024

Official CMS public-use data for Diana Gilligan, 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)156 services
2. Telephone medical discussion with physician, 5-10 minutes (99441)41 services
3. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)20 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%
• Arthritis47%
• Chronic kidney disease37%
• Diabetes32%
• Anxiety28%

Hospitals where Diana Gilligan works

Medicare's Facility Affiliation Data lists Diana Gilligan 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.

• Oswego HospitalOswego, NY · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 330218
• University Hospital S U N y Health Science CenterSyracuse, NY · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 330241

Practice locations

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

• 750 E Adams StSyracuse, NY 13210

Group practices

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

• Department of Medicine Medical Serv GRP at SUNY Hlth Sci Ctr Syr in282 clinicians in the group

Specialties

• Hematologyprimary
• Internal Medicinealso

Find other Hematology doctors in New York →

Other hematologists in New York

Clinicians with the same Medicare primary specialty in New York — not a recommendation.

• Ellin Berman, MD
• Katherine A. Hawkins, MD
• Clive S. Zent, MD
• Vinit Karur, MD
• Malin L. Hultcrantz
• Marc Schwartz, MD
• Elizabeth A. Comen
• Sadia Riaz, DO

All hematologists in New York →

Other clinicians in Department of Medicine Medical Serv GRP at SUNY Hlth Sci Ctr Syr in

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

• Nisij Shrestha, MD
• Iqra Nawaz, MD
• Jade Homsi, MD
• Lindsey M. Painter, NP
• Matthew J. Hess, MD
• Adeeb H. Al-Quthami, 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