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

William R Grier, MD

Individual provider Internal Medicine Physician · NPI 1740643378

William R Grier, MD is a Critical Care (Intensivists) in Baltimore, Maryland. Graduated from Drexel University College of Medicine in 2016, 10 years ago. Practices with University of Maryland Physicians PA, a 390-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in Maryland.

Years since qualifying
10
Trained at
Drexel University College of Medicine
Licensed in
MD
In the registry since
2016
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

22 S Greene St Rm N3E09
Baltimore, MD 21201-1544
Phone: (410) 328-6110
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 301 Hospital Dr, Glen Burnie, MD 21061-5803 — (410) 787-4000

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence D91153 (MD)

Record details

NPI number1740643378
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 31, 2016
Last updated in NPPESDecember 20, 2021
Certification dateDecember 20, 2021

Medicare enrollment

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

Medicare specialtyCRITICAL CARE (INTENSIVISTS)
Also practisesINTERNAL MEDICINE, PULMONARY DISEASE
Medical schoolDREXEL UNIVERSITY COLLEGE OF MEDICINE
Graduated 2016 (10 years in practice)
Group practice University Of Maryland Physicians Pa — 390 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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