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

Dr. Gregory McArdle Williams, MD, MBA

Individual provider Internal Medicine Physician · NPI 1528761368

Dr. Gregory McArdle Williams, MD, MBA is an Internal Medicine in New York, New York. Qualified in 2023, 3 years ago. Practices as a sole proprietor. Licensed in New York.

Years since qualifying
3
Licensed in
NY
In the registry since
2023
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.
MBA — Master of Business Administration
A graduate business degree.

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Practice location Address checks out

100 E 77th St
New York, NY 10075-1850
Phone: (212) 434-4763
Fax: (212) 434-2246
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 344899 (NY)
Hospitalist Physician Taxonomy 208M00000X · Licence 344899 (NY)

Record details

NPI number1528761368
Entity typeIndividual (Type 1)
GenderMale
Credentials MD , MBA
Sole proprietorYes
NPI enumeratedMarch 22, 2023
Last updated in NPPESJune 30, 2026
Certification dateJune 30, 2026

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2023 (3 years in practice)
Accepts Medicare assignment Not indicated
Practice locations2 on file with Medicare

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