William Michael Sullivan, DNP, FNP-C
Family Nurse Practitioner · Baltimore, MD
William Michael Sullivan, DNP, FNP-C is a family nurse practitioner with a practice address in Baltimore, Maryland, and NPI 1215618145, issued on Jul 25, 2023. Check the license (Maryland R182391, as entered in NPPES) with the Maryland board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- William Michael Sullivan
- Credential
- DNP, FNP-C
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- R182391 MD
Self-reported in NPPES; status is on the state search - Practice location
- 6500 Baltimore National Pike, Baltimore, MD 21228
- Phone
- (855) 910-3278
- Enumerated
- Jul 25, 2023
- Record last updated
- Aug 4, 2026
- Medicare enrollment
- Enrolled (PECOS I20240418000653); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 4,124 in Maryland → Look up another NPI →
Verify William Michael Sullivan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maryland board licenses this profession
Search for license R182391Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average family nurse practitioner in 2024
104 Medicare Part D claims for 80 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D.
Most prescribed
- Amoxicillin-Clavulanate Potass11 claims
- Doxycycline Monohydrate11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Medstar Urgent Care LLCWheaton, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Michael Sullivan among 4,124 family nurse practitioner records in Maryland
William Michael Sullivan, DNP, FNP-C is one of 4,124 family nurse practitioner records with a practice address in Maryland. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2023, is newer than 78% of them.
- NPI issued2023 · 78% of these records are older, 14% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2023 · median 2019 among the 2,370 with a school on file
- Record last updated2026 · 41% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
712 family nurse practitioner records list a practice address in Baltimore
They are 712 of the 35,183 NPPES records with a practice address in Baltimore, and 4,124 family nurse practitioner records in Maryland.
All 4,124 in Maryland → Every provider in Baltimore → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Uchechi Asiegbu, CRNPCatonsville, MD 212281598018715
- Assiatu Barrie, FNPCatonsville, MD 212281104100882
- Mercy Fadoju, C.R.N.P.Baltimore, MD 212281962671313
- Shusma Karki, CRNPCatonsville, MD 212281679022370
- Laura Lambert, NPCatonsville, MD 212281639546443
- Anna Lamdin, NP-CCatonsville, MD 212281649635525
- Elizabeth MillerCatonsville, MD 212281346795309
- Paula Ohiku, DNP, CRNP, PMHNPCatonsville, MD 212281215185327
Common questions
What is William Michael Sullivan, DNP, FNP-C's NPI number?
William Michael Sullivan, DNP, FNP-C's National Provider Identifier (NPI) is 1215618145, issued on Jul 25, 2023. An NPI identifies a provider in billing; it is not a license.
Where is William Michael Sullivan, DNP, FNP-C located?
The NPPES record lists a practice address at 6500 Baltimore National Pike, Baltimore, MD, 21228. Phone: (855) 910-3278. Providers update this record themselves, so call before visiting.
How can I verify William Michael Sullivan, DNP, FNP-C's license?
NPPES lists Maryland license number R182391, as entered by the provider. Search the Maryland board that licenses this profession; the NPPES record confirms identity only.
How much does William Michael Sullivan, DNP, FNP-C prescribe under Medicare Part D?
In 2024, William Michael Sullivan, DNP, FNP-C had 104 Medicare Part D claims for 80 beneficiaries; the average among family nurse practitioner prescribers was 1,305. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.