MRS. ALYSSA SUSAN WILLIAMS PMHNP-BC
NPI 1528601036
Nurse Practitioner - Psychiatric/Mental Health in Leonardtown, MD
About Mrs. Alyssa Susan Williams Pmhnp-bc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MRS. ALYSSA SUSAN WILLIAMS PMHNP-BC (NPI 1528601036) is an individual psychiatric/mental health provider in Leonardtown, Maryland, licensed in Maryland (R215583) and active in the NPI registry since October 2019. She is enrolled in Medicare PECOS, is affiliated with Calverthealth Medical Center, and is a graduate of Other (2019).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Mrs. Alyssa Susan Williams Pmhnp-bc is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show Alyssa Williams reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Silver Spring, MD 20910
- Reassigned Medicare billing, District of Columbia and Maryland enrollments
- 128 clinicians in this Medicare group
Baltimore, MD 21204
- Reassigned Medicare billing, Maryland enrollment
- Medicare enrollment name: Sheppard Pratt Physicians PA
- 187 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 3
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Calverthealth Medical Center
Acute Care Hospitals · Prince Frederick, MDPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 20650 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
LEONARDTOWN, MD 20650
LEONARDTOWN, MD 20650
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Alyssa Williams's NPI number?
The NPI number for Alyssa Williams is 1528601036. It was assigned to this individual provider in the NPPES registry on October 28, 2019. The provider is also known as Alyssa Susan Bogacki.
Where is Alyssa Williams located?
Alyssa Williams practices at 25500 Point Lookout Rd, Leonardtown, MD 20650. The listed phone number is (301) 475-6227.
What is Alyssa Williams's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Psychiatric/Mental Health, with taxonomy code 363LP0808X.
Is Alyssa Williams enrolled in Medicare?
Yes. Alyssa Williams is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Alyssa Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Alyssa Williams reassigns Medicare benefits to 2 organizations: Axis Healthcare Group (Silver Spring, MD) and Sheppard Pratt Physicians, P.A. (Baltimore, MD). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Alyssa Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Alyssa Williams affiliated with any hospitals?
According to CMS data, Alyssa Williams is affiliated with Calverthealth Medical Center.
When was this NPI record last updated?
The NPPES record for Alyssa Williams was last updated on September 24, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Mrs. Alyssa Susan Williams, PMHNP-BC · NPI 1528601036
Psychiatric/Mental Health physician in Leonardtown, Maryland. Individual provider, active in the CMS NPPES registry since October 28, 2019.
## Identity
- **NPI:** 1528601036 (Entity type: Individual)
- **Enumerated:** October 28, 2019
- **Primary specialty:** Nurse Practitioner - Psychiatric/Mental Health · taxonomy 363LP0808X
- **State license:** R215583 (Maryland)
- **Sole proprietor:** No
## Practice location
- **Address:** 25500 POINT LOOKOUT RD, Leonardtown, MD 20650-2015
- **Phone:** (301) 475-6227 · **Fax:** (301) 475-6169
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Axis Healthcare Group (NPI 1326295098, Silver Spring, MD); Sheppard Pratt Physicians, P.A. (NPI 1518990712, Baltimore, MD) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2019
## Record status
- **NPPES last updated:** September 24, 2020
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Source: [NPI Profile](https://npiprofile.com/npi/1528601036) · Data from the CMS NPPES public registry.