JOY WILLIAMS NP
NPI 1235594763
Nurse Practitioner - Acute Care in Boston, MA
About Joy Williams Np NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOY WILLIAMS NP (NPI 1235594763) is an individual acute care provider in Boston, Massachusetts, licensed in Massachusetts (NP 153670) and active in the NPI registry since December 2015. She is enrolled in Medicare PECOS and is a graduate of Other (2015).
NPPES Registry Identity
Specialties & Licenses
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
Joy Williams Np 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
5Medicare enrollment records show Joy Williams reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,360 clinicians in this Medicare group
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,234 clinicians in this Medicare group
Boston, MA 02109
- Reassigned Medicare billing, Massachusetts enrollment
- 1,317 clinicians in this Medicare group
East Boston, MA 02128
- Reassigned Medicare billing, Massachusetts enrollment
- 577 clinicians in this Medicare group
East Boston, MA 02128
- Reassigned Medicare billing, Massachusetts enrollment
- Medicare enrollment name: East Boston Neighborhood Health Center Corp
- 456 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02114 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
BOSTON, MA 02114
BOSTON, MA 02114
BOSTON, MA 02114
BOSTON, MA 02114
BOSTON, MA 02114
BOSTON, MA 02114
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 Joy Williams's NPI number?
The NPI number for Joy Williams is 1235594763. It was assigned to this individual provider in the NPPES registry on December 29, 2015.
Where is Joy Williams located?
Joy Williams practices at 55 Fruit Street Interventional Radiology Ellison 210, Boston, MA 02114. The listed phone number is (617) 724-4289.
What is Joy Williams's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Acute Care, with taxonomy code 363LA2100X.
Is Joy Williams enrolled in Medicare?
Yes. Joy 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 Joy Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Joy Williams reassigns Medicare benefits to 5 organizations: Massachusetts General Physicians Organization Inc (Boston, MA), The General Hospital Corporation (Boston, MA), Atrius Health, Inc. (Boston, MA), Internal Medical Associates-Ebnhc (East Boston, MA) and Neighborhealth Corporation (East Boston, MA). 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 Joy Williams'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 Joy Williams was last updated on December 29, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.
# Joy Williams, NP · NPI 1235594763
Acute Care physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since December 29, 2015.
## Identity
- **NPI:** 1235594763 (Entity type: Individual)
- **Enumerated:** December 29, 2015
- **Primary specialty:** Nurse Practitioner - Acute Care · taxonomy 363LA2100X
- **State license:** NP 153670 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 55 FRUIT STREET, INTERVENTIONAL RADIOLOGY ELLISON 210, Boston, MA 02114-2622
- **Phone:** (617) 724-4289
## 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:** 5 organizations under Medicare reassignment (form CMS-855R): Massachusetts General Physicians Organization Inc (NPI 1801874573, Boston, MA); The General Hospital Corporation (NPI 1023049236, Boston, MA); Atrius Health, Inc. (NPI 1265646921, Boston, MA); Internal Medical Associates-Ebnhc (NPI 1558481879, East Boston, MA); Neighborhealth Corporation (NPI 1316994411, East Boston, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2015
## Record status
- **NPPES last updated:** December 29, 2015
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Source: [NPI Profile](https://npiprofile.com/npi/1235594763) · Data from the CMS NPPES public registry.