DR. ERIN J LEAHY M.D.
NPI 1235339607
Internal Medicine - Geriatric Medicine in Springfield, MA
About Dr. Erin J Leahy M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ERIN J LEAHY M.D. (NPI 1235339607) is an individual geriatric medicine provider in Springfield, Massachusetts, licensed in Wisconsin (52576) and active in the NPI registry since July 2007. She is enrolled in Medicare PECOS, is affiliated with Confluence Health Hospital, and is a graduate of Medical College Of Wisconsin (2007).
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
Dr. Erin J Leahy M.d. 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
4Medicare enrollment records show Erin Leahy reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Roseland, NJ 07068
- Reassigned Medicare billing, Wisconsin enrollment
Staten Island, NY 10314
- Reassigned Medicare billing, Wisconsin enrollment
Chicago, IL 60613
- Reassigned Medicare billing, Wisconsin enrollment
Overland Park, KS 66213
- Reassigned Medicare billing, Wisconsin enrollment
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 6
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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Confluence Health Hospital
Acute Care Hospitals · Wenatchee, WAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 01107 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.
SPRINGFIELD, MA 01107
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 Erin Leahy's NPI number?
The NPI number for Erin Leahy is 1235339607. It was assigned to this individual provider in the NPPES registry on July 23, 2007.
Where is Erin Leahy located?
Erin Leahy practices at 759 Chestnut St S2668, Springfield, MA 01107. The listed phone number is (413) 794-8121.
What is Erin Leahy's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Geriatric Medicine, with taxonomy code 207RG0300X.
Is Erin Leahy enrolled in Medicare?
Yes. Erin Leahy 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 Erin Leahy's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Erin Leahy reassigns Medicare benefits to 4 organizations: Carend Provider Group Of New Jersey PC (Roseland, NJ), Care Neurodegenerative Medical Of New York PC (Staten Island, NY), Carend Provider Group PA (Chicago, IL) and Carend Provider Group Of Kansas PA (Overland Park, KS). 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 Erin Leahy's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Erin Leahy affiliated with any hospitals?
According to CMS data, Erin Leahy is affiliated with Confluence Health Hospital.
When was this NPI record last updated?
The NPPES record for Erin Leahy was last updated on June 8, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.