Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Gregory J Castiglia, MD

Individual provider Neurological Surgery Physician · NPI 1003891896

Gregory J Castiglia, MD is a Neurosurgery in Williamsville, New York. Graduated from Columbia University College of Physicians and Surgeons in 1992, 34 years ago. Practices with University at Buffalo Neurosurgery Inc, a 70-clinician group and accepts Medicare assignment. Licensed in New York.

Years since qualifying
34
Trained at
Columbia University College of Physicians and Surgeons
Licensed in
NY
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

40 George Karl Blvd
Williamsville, NY 14221-7183
Phone: (716) 218-1000
Fax: (716) 200-1857
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Neurological Surgery Physician (primary) Taxonomy 207T00000X · Licence 1982201 (NY)

Record details

NPI number1003891896
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedDecember 14, 2005
Last updated in NPPESOctober 15, 2019

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNEUROSURGERY
Medical schoolCOLUMBIA UNIVERSITY COLLEGE OF PHYSICIANS AND SURGEONS
Graduated 1992 (34 years in practice)
Group practice University At Buffalo Neurosurgery Inc — 70 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 on file with Medicare

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