DR. GAIL S. WILLIAMS M.D.
NPI 1215964648
Internal Medicine - Nephrology in New York, NY
About Dr. Gail S. Williams M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. GAIL S. WILLIAMS M.D. (NPI 1215964648) is an individual nephrology provider in New York, New York, licensed in New York (104534) and active in the NPI registry since June 2006. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 3
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Gail S. Williams M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Gail Williams reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
New York, NY 10032
- Reassigned Medicare billing, New York enrollment
- Also billed through NPI 1982993184 (New York)
- 3,922 clinicians in this Medicare group
New York, NY 10032
- Reassigned Medicare billing, New York enrollment
- 612 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 10032 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.
NEW YORK, NY 10032
NEW YORK, NY 10032
NEW YORK, NY 10032
NEW YORK, NY 10032
NEW YORK, NY 10032
NEW YORK, NY 10032
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 Gail Williams's NPI number?
The NPI number for Gail Williams is 1215964648. It was assigned to this individual provider in the NPPES registry on June 28, 2006.
Where is Gail Williams located?
Gail Williams practices at 180 Fort Washington Ave Room 236, New York, NY 10032. The listed phone number is (212) 305-5376.
What is Gail Williams's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.
Is Gail Williams enrolled in Medicare?
Yes. Gail Williams is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Gail Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gail Williams reassigns Medicare benefits to 2 organizations: Trustees Of Columbia University In The City Of New York (New York, NY) and Trustees Of Columbia University In The City Of New York (New York, 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 Gail 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 Gail Williams was last updated on April 19, 2016. 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.
# Dr. Gail S. Williams, M.D. · NPI 1215964648
Nephrology physician in New York, New York. Individual provider, active in the CMS NPPES registry since June 28, 2006.
## Identity
- **NPI:** 1215964648 (Entity type: Individual)
- **Enumerated:** June 28, 2006
- **Primary specialty:** Internal Medicine - Nephrology · taxonomy 207RN0300X
- **State license:** 104534 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 180 FORT WASHINGTON AVE, ROOM 236, New York, NY 10032-3722
- **Phone:** (212) 305-5376 · **Fax:** (212) 305-5155
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Trustees Of Columbia University In The City Of New York (NPI 1508266347, New York, NY); Trustees Of Columbia University In The City Of New York (NPI 1437176047, New York, NY) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** April 19, 2016
- **Other identifiers:** Medicare UPIN D47770 (NY); Medicare ID-Type Unspecified 567031 (NY); Medicaid 01001156 (NY)
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Source: [NPI Profile](https://npiprofile.com/npi/1215964648) · Data from the CMS NPPES public registry.