Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
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Mrs. Alyssa Susan Williams, PMHNP-BC

Individual provider Psychiatric/Mental Health Nurse Practitioner · NPI 1528601036

Mrs. Alyssa Susan Williams, PMHNP-BC is a Nurse Practitioner in Leonardtown, Maryland. Qualified in 2019, 7 years ago. Practices with Sheppard Pratt Physicians PA, a 72-clinician group and accepts Medicare assignment. Licensed in Maryland.

Years since qualifying
7
Licensed in
MD
In the registry since
2019
What do these letters mean?
PMHNP-BC — Psychiatric-Mental Health Nurse Practitioner, Board Certified
A board-certified psychiatric nurse practitioner.

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Practice location Address checks out

25500 Point Lookout Rd
Leonardtown, MD 20650-2015
Phone: (301) 475-6227
Fax: (301) 475-6169
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychiatric/Mental Health Nurse Practitioner (primary) Taxonomy 363LP0808X · Licence R215583 (MD)

Record details

NPI number1528601036
Entity typeIndividual (Type 1)
GenderFemale
Credentials PMHNP-BC
Sole proprietorNo
NPI enumeratedOctober 28, 2019
Last updated in NPPESSeptember 24, 2020
Certification dateSeptember 24, 2020

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2019 (7 years in practice)
Group practice Sheppard Pratt Physicians Pa — 72 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients34
Services billed 125 a service is one billed item, such as a visit, a test or a procedure
Average patient age56

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Sheppard Pratt Physicians PA

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 72 clinicians in the practice; 12 are shown here.

Other providers in Leonardtown