CHRISTOPHER D. WILLIAMS FNP
NPI 1881825834
Nurse Practitioner - Family in Hopewell Junction, NY
About Christopher D. Williams Fnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CHRISTOPHER D. WILLIAMS FNP (NPI 1881825834) is an individual family provider in Hopewell Junction, New York, licensed in New York (F336044) and active in the NPI registry since August 2009. He is enrolled in Medicare PECOS.
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 (PECOS)
Christopher D. Williams Fnp is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
3Medicare enrollment records show Christopher Williams reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Mount Kisco, NY 10549
- Reassigned Medicare billing, New York enrollment
- 76 clinicians in this Medicare group
Mount Kisco, NY 10549
- Reassigned Medicare billing, New York enrollment
- Medicare enrollment name: Optum Medical Care PC
- 1,601 clinicians in this Medicare group
Great Neck, NY 11021
- Reassigned Medicare billing, New York enrollment
- 9,353 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 12533 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.
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 Christopher Williams's NPI number?
The NPI number for Christopher Williams is 1881825834. It was assigned to this individual provider in the NPPES registry on August 6, 2009.
Where is Christopher Williams located?
Christopher Williams practices at 10 Hamilton Rd, Hopewell Junction, NY 12533. The listed phone number is (845) 226-6746.
What is Christopher Williams's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is Christopher Williams enrolled in Medicare?
Yes. Christopher Williams is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Christopher Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Christopher Williams reassigns Medicare benefits to 3 organizations: Northern Westchester Hospital Association (Mount Kisco, NY), Optum Medical Care, P.C. (Mount Kisco, NY) and North Shore-Lij Medical PC (Great Neck, 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 Christopher 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 Christopher Williams was last updated on August 6, 2009. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.
# Christopher D. Williams, FNP · NPI 1881825834
Family physician in Hopewell Junction, New York. Individual provider, active in the CMS NPPES registry since August 6, 2009.
## Identity
- **NPI:** 1881825834 (Entity type: Individual)
- **Enumerated:** August 6, 2009
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** F336044 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 10 HAMILTON RD, Hopewell Junction, NY 12533-5203
- **Phone:** (845) 226-6746
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Northern Westchester Hospital Association (NPI 1679641237, Mount Kisco, NY); Optum Medical Care, P.C. (NPI 1982643003, Mount Kisco, NY); North Shore-Lij Medical PC (NPI 1053688572, Great Neck, NY) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** August 6, 2009
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Source: [NPI Profile](https://npiprofile.com/npi/1881825834) · Data from the CMS NPPES public registry.