Julian L. Ambrus Jr., MD

Medicare activity in 2024

Official CMS public-use data for Julian L. Ambrus Jr., 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, potassium chloride, per 2 meq (J3480)2,777 services
2. Injection, magnesium sulfate, per 500 mg (J3475)1,155 services
3. 5% dextrose/normal saline (500 ml = 1 unit) (J7042)618 services
4. Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less (96365)598 services
5. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)285 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).

• Arthritis67%
• High cholesterol65%
• High blood pressure57%
• Anxiety46%
• Depression42%
• Asthma32%

Hospitals where Julian L. Ambrus Jr. works

Medicare's Facility Affiliation Data lists Julian L. Ambrus Jr. 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.

• Kaleida HealthBuffalo, NY · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 330005
• Mercy Hospital of BuffaloBuffalo, NY · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 330279
• Mount St. Mary's Hospital & Health CenterLewiston, NY · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 330188
• Sisters of Charity HospitalBuffalo, NY · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 330078

Practice locations

Addresses where Julian L. Ambrus Jr. is enrolled with Medicare (CMS data updated October 2, 2026).

• 400 International DrWilliamsville, NY 14221 (716) 631‑3555

Group practices

Medicare enrollment lists Julian L. Ambrus Jr. as a member of this group (CMS data updated October 2, 2026).

• Brain and Spine Medical Services PLLC56 clinicians in the group

Specialties

• Allergy/Immunologyprimary
• Internal Medicinealso

Find other Allergy/Immunology doctors in New York →

Other allergist and immunologists in Williamsville

Clinicians with the same Medicare primary specialty in Williamsville, NY — not a recommendation.

• Andrew W. Green, MD
• Sean P. Brady, MD
• Roland A. Honeine, MD
• Daniel J. Hamilton, MD

All allergist and immunologists in Williamsville →

Other clinicians in Brain and Spine Medical Services PLLC

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

• Christina M. Reed
• Kellie N. Schwartz, PA
• Kristin Williamson, PA
• Mark Mangkhalakhili
• Joseph C. Dipirro, MD
• Margaret A. Mayer

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