Physician Profile
Julian Ambrus, MD practices internal medicine in Williamsville, NY. Julian is a 1979 graduate of Jefferson Medical College of Thomas Jefferson University. According to Medicare claims data, Julian cared for 366 Medicare patients across 5,973 services. The services billed most often include injection, potassium chloride, per 2 meq, injection, magnesium sulfate, per 500 mg, and 5% dextrose/normal saline (500 ml = 1 unit).
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it — free, and no identity document with a practice or institutional email.
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
400 INTERNATIONAL DR
Williamsville, NY 14221
Within Internal Medicine generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Most searched conditions
Cardiometabolic
Digestive and liver
Endocrine, blood, and bone
Infectious disease
Kidney and urinary
Respiratory
Blood & Circulation
Blood disorders
Brain & Nerves
Brain and nerves
Cardiac and vascular
Digestive
Heart & Circulation
Infections
Kidney & Bladder
Lungs & Breathing
Mental Health
Neurologic and behavioral
Pain
Rheumatologic and pain
Most searched procedures
Preventive and evaluation
Screening and diagnostic testing
Bones & Joints
Brain and nerves
Cancer screening
Digestive
Exams & Consultations
Heart & Circulation
Heart health
Imaging referral
Immunizations
Lab tests
Lungs & Breathing
Metabolic & Weight
Minor procedures
Office procedures
Office Procedures
Pain management
Preventive & Routine Care
Screenings & Diagnostics
Sexual health
5,973 services · 366 patients · 8 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less | Treatment | 96365 |
598 | More than most peers in Internal Medicine |
| Injection, potassium chloride, per 2 meq | Drug given | J3480 |
2,777 | Too few peers to compare |
| Injection, magnesium sulfate, per 500 mg | Drug given | J3475 |
1,155 | More than most peers in Internal Medicine |
| 5% dextrose/normal saline (500 ml = 1 unit) | Drug given | J7042 |
618 | Too few peers to compare |
| Infusion, normal saline solution , 1000 cc | Drug given | J7030 |
279 | More often than most peers in Internal Medicine |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
285 | More often than most peers in Internal Medicine |
| Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more | Office visit | 99215 |
248 | More than most peers in Internal Medicine |
| Telephone medical discussion with physician, 21-30 minutes | Office visit | 99443 |
13 | Less often than most peers in Internal Medicine |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Dr. Ambrus is an internist in Williamsville, NY. That is the designation recorded for this NPI in the federal registry, where it is listed as “Internal Medicine”.
NPI registry
Dr. Ambrus is listed at 400 International Dr, Williamsville, NY 14221. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
The number on file is (716) 631-3555. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
Dr. Ambrus's National Provider Identifier is 1811919988. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Dr. Ambrus attended Jefferson Medical College of Thomas Jefferson University, graduating in 1979. This comes from the CMS National Downloadable File.
CMS public data
Dr. Ambrus has 47 years experience. Calculated from a graduation year of 1979, reported in the CMS National Downloadable File.
CMS public data
According to Medicare billing data, Dr. Ambrus provides treatments such as infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Ambrus. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.