MATTHEW KIRKPATRICK WILLIAMS
NPI 1598414773
Anesthesiology in New York, NY
About Matthew Kirkpatrick Williams NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MATTHEW KIRKPATRICK WILLIAMS (NPI 1598414773) is an individual anesthesiology provider in New York, New York, licensed in New York (342210) and active in the NPI registry since March 2022. He is enrolled in Medicare PECOS, is affiliated with Phelps Hospital, and is a graduate of Other (2022).
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
Matthew Kirkpatrick Williams 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 Reassignment
Medicare enrollment records show Matthew Williams reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Chappaqua, NY 10514
- Reassigned Medicare billing, New York enrollment
- 1,406 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Phelps Hospital
Acute Care Hospitals · Sleepy Hollow, NYOther Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
NEW YORK, NY 10029
NEW YORK, NY 10029
NEW YORK, NY 10029
NEW YORK, NY 10029
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 Matthew Williams's NPI number?
The NPI number for Matthew Williams is 1598414773. It was assigned to this individual provider in the NPPES registry on March 23, 2022.
Where is Matthew Williams located?
Matthew Williams practices at 1 Gustave L Levy Pl, New York, NY 10029. The listed phone number is (212) 241-6500.
What is Matthew Williams's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Matthew Williams enrolled in Medicare?
Yes. Matthew 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 organization bills Medicare for Matthew Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Matthew Williams reassigns Medicare benefits to North Shore - Lij Anesthesiology, PC (Chappaqua, NY). The 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 Matthew Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Matthew Williams affiliated with any hospitals?
According to CMS data, Matthew Williams is affiliated with Phelps Hospital.
When was this NPI record last updated?
The NPPES record for Matthew Williams was last updated on February 11, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.
# Matthew Kirkpatrick Williams · NPI 1598414773
Anesthesiology physician in New York, New York. Individual provider, active in the CMS NPPES registry since March 23, 2022.
## Identity
- **NPI:** 1598414773 (Entity type: Individual)
- **Enumerated:** March 23, 2022
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** 342210 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 1 GUSTAVE L LEVY PL, New York, NY 10029-6504
- **Phone:** (212) 241-6500
## 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:** North Shore - Lij Anesthesiology, PC (NPI 1417401266, Chappaqua, NY), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2022
## Record status
- **NPPES last updated:** February 11, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1598414773) · Data from the CMS NPPES public registry.