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

William Michael Sullivan, DNP, FNP-C

Individual provider Family Nurse Practitioner · NPI 1215618145

William Michael Sullivan, DNP, FNP-C is a Nurse Practitioner in Baltimore, Maryland. Qualified in 2023, 3 years ago. Practices with Medstar Urgent Care LLC, a 299-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Maryland.

Years since qualifying
3
Licensed in
MD
In the registry since
2023
What do these letters mean?
DNP — Doctor of Nursing Practice
The highest clinical degree in nursing.
FNP-C — Family Nurse Practitioner, Certified
A family nurse practitioner certified by the AANP.

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Practice location Address checks out

6500 Baltimore National Pike
Baltimore, MD 21228-4200
Phone: (855) 910-3278
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Nurse Practitioner (primary) Taxonomy 363LF0000X · Licence R182391 (MD)

Record details

NPI number1215618145
Entity typeIndividual (Type 1)
GenderMale
Credentials DNP , FNP-C
Sole proprietorNo
NPI enumeratedJuly 25, 2023
Last updated in NPPESAugust 4, 2026
Certification dateAugust 4, 2026

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2023 (3 years in practice)
Group practice Medstar Urgent Care Llc — 299 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations13 on file with Medicare

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