DAWN E. WILLIAMSON M.D.
NPI 1073592549
Internal Medicine in Long Beach, NY
About Dawn E. Williamson M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DAWN E. WILLIAMSON M.D. (NPI 1073592549) is an individual internal medicine provider in Long Beach, New York, licensed in New York (190633) and active in the NPI registry since January 2006. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dawn E. Williamson M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
5Medicare enrollment records show Dawn Williamson reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Long Beach, NY 11561
- Reassigned Medicare billing, New York enrollment
- Medicare enrollment name: Nassau Health Care Corporation
- 553 clinicians in this Medicare group
Oceanside, NY 11572
- Reassigned Medicare billing, New York enrollment
- 52 clinicians in this Medicare group
Far Rockaway, NY 11691
- Reassigned Medicare billing, New York enrollment
- Medicare enrollment name: Island Emergency Medical Services PC
- 290 clinicians in this Medicare group
New Hyde Park, NY 11040
- Reassigned Medicare billing, New York enrollment
- 9,353 clinicians in this Medicare group
Elmira, NY 14901
- Reassigned Medicare billing, New York enrollment
- 72 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 4
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 11561 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.
LONG BEACH, NY 11561
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 Dawn Williamson's NPI number?
The NPI number for Dawn Williamson is 1073592549. It was assigned to this individual provider in the NPPES registry on January 12, 2006.
Where is Dawn Williamson located?
Dawn Williamson practices at 455 E Bay Dr, Long Beach, NY 11561. The listed phone number is (516) 897-1100.
What is Dawn Williamson's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Dawn Williamson enrolled in Medicare?
Yes. Dawn Williamson is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Dawn Williamson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Dawn Williamson reassigns Medicare benefits to 5 organizations: Long Beach Community Health Center (Long Beach, NY), South Nassau Physician Group PC (Oceanside, NY), Island Emergency Medical Services, P.C. (Far Rockaway, NY), North Shore - Lij Medical PC (New Hyde Park, NY) and Nes Medical Services Of New York PC (Elmira, NY). 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 Dawn Williamson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Dawn Williamson was last updated on September 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 months 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.
# Dawn E. Williamson, M.D. · NPI 1073592549
Internal Medicine physician in Long Beach, New York. Individual provider, active in the CMS NPPES registry since January 12, 2006.
## Identity
- **NPI:** 1073592549 (Entity type: Individual)
- **Enumerated:** January 12, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 190633 (New York)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 455 E BAY DR, Long Beach, NY 11561-2301
- **Phone:** (516) 897-1100 · **Fax:** (516) 897-1106
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 5 organizations under Medicare reassignment (form CMS-855R): Long Beach Community Health Center (NPI 1629094529, Long Beach, NY); South Nassau Physician Group PC (NPI 1922460542, Oceanside, NY); Island Emergency Medical Services, P.C. (NPI 1639160385, Far Rockaway, NY); North Shore - Lij Medical PC (NPI 1790043479, New Hyde Park, NY); Nes Medical Services Of New York PC (NPI 1831742816, Elmira, NY) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** September 11, 2025
- **Other identifiers:** Other 063AL1 (NY); Medicaid 01604993 (NY)
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Source: [NPI Profile](https://npiprofile.com/npi/1073592549) · Data from the CMS NPPES public registry.