THERESA A GILLIS MD
NPI 1396725057
Physical Medicine & Rehabilitation in New York, NY
About Theresa A Gillis Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
THERESA A GILLIS MD (NPI 1396725057) is an individual physical medicine & rehabilitation provider in New York, New York, licensed in New York (82409197) and active in the NPI registry since January 2006. She is enrolled in Medicare PECOS, is affiliated with Hackensack University Medical Center, and is a graduate of Northeastern Ohio University College Of Medicine (1989).
NPPES Registry Identity
Specialties & Licenses 3
Accepted Insurance
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
Theresa A Gillis Md 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
3Medicare enrollment records show Theresa Gillis reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
New York, NY 10021
- Reassigned Medicare billing, New York enrollment
- 191 clinicians in this Medicare group
Montvale, NJ 07645
- Reassigned Medicare billing, New Jersey enrollment
- 401 clinicians in this Medicare group
Middletown, NJ 07748
- Reassigned Medicare billing, New Jersey enrollment
- 464 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.
Hospital Affiliations CMS Care Compare 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Hackensack University Medical Center
Acute Care Hospitals · Hackensack, NJValley Hospital
Acute Care Hospitals · Paramus, NJHelen Hayes Hospital
Acute Care Hospitals · West Haverstraw, NYMedicare 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 Theresa Gillis's NPI number?
The NPI number for Theresa Gillis is 1396725057. It was assigned to this individual provider in the NPPES registry on January 19, 2006.
Where is Theresa Gillis located?
Theresa Gillis practices at 515 Madison Ave Frnt 5, New York, NY 10022. The listed phone number is (646) 888-1936.
What is Theresa Gillis's specialty?
The primary specialty registered for this NPI is Physical Medicine & Rehabilitation with taxonomy code 208100000X.
Is Theresa Gillis enrolled in Medicare?
Yes. Theresa Gillis 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 Theresa Gillis's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Theresa Gillis reassigns Medicare benefits to 3 organizations: Memorial Neurology Group (New York, NY), Msk Bergen (Montvale, NJ) and Msk Monmouth (Middletown, NJ). 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 Theresa Gillis's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Theresa Gillis accept?
Health plans from Oscar Health list Theresa Gillis as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Theresa Gillis affiliated with any hospitals?
According to CMS data, Theresa Gillis is affiliated with Hackensack University Medical Center, Valley Hospital and Helen Hayes Hospital.
When was this NPI record last updated?
The NPPES record for Theresa Gillis was last updated on December 19, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.