GREGORY S ZIMMERMANN M.D.
NPI 1972601409
Radiology - Diagnostic Radiology in Hagerstown, MD
About Gregory S Zimmermann M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GREGORY S ZIMMERMANN M.D. (NPI 1972601409) is an individual diagnostic radiology provider in Hagerstown, Maryland, licensed in Maryland (D56082) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS, is affiliated with Saint Agnes Hospital, and maintains a secondary practice location in Hagerstown.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 1
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
Gregory S Zimmermann 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 Gregory Zimmermann reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Hagerstown, MD 21742
- Reassigned Medicare billing, Maryland enrollment
- 19 clinicians in this Medicare group
Hagerstown, MD 21742
- Reassigned Medicare billing, Maryland enrollment
- 24 clinicians in this Medicare group
Mc Connellsburg, PA 17233
- Reassigned Medicare billing, Pennsylvania enrollment
- 17 clinicians in this Medicare group
Baltimore, MD 21229
- Reassigned Medicare billing, Maryland enrollment
- 372 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 83
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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Saint Agnes Hospital
Acute Care Hospitals · Baltimore, MDFulton County Medical Center
Critical Access Hospitals · Mcconnellsburg, PAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 21740 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.
Reported Quality Measures
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 Gregory Zimmermann's NPI number?
The NPI number for Gregory Zimmermann is 1972601409. It was assigned to this individual provider in the NPPES registry on September 20, 2006.
Where is Gregory Zimmermann located?
Gregory Zimmermann practices at 10715 Downsville Pike Ste 106, Hagerstown, MD 21740. The listed phone number is (301) 739-6144.
What is Gregory Zimmermann's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.
Is Gregory Zimmermann enrolled in Medicare?
Yes. Gregory Zimmermann 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 Gregory Zimmermann's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Zimmermann reassigns Medicare benefits to 4 organizations: Associated Radiologists, PA (Hagerstown, MD), Diagnostic Imaging Services, LLC (Hagerstown, MD), Fulton Diagnostic Radiology LLC (Mc Connellsburg, PA) and St Agnes Healthcare Inc (Baltimore, MD). 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 Gregory Zimmermann's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Gregory Zimmermann affiliated with any hospitals?
According to CMS data, Gregory Zimmermann is affiliated with Saint Agnes Hospital and Fulton County Medical Center.
When was this NPI record last updated?
The NPPES record for Gregory Zimmermann was last updated on March 20, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.