TRINITY HEALTH MID-ATLANTIC MEDICAL GROUP
NPI 1447776729
Internal Medicine - Infectious Disease in Darby, PA
About Trinity Health Mid-atlantic Medical Group NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
TRINITY HEALTH MID-ATLANTIC MEDICAL GROUP (NPI 1447776729), doing business as Mercy Management Of Southeastern Pennsylvania, is a healthcare organization registered as an infectious disease in Darby, Pennsylvania and active in the NPI registry since August 2017. The organization lists Julie Keese, Vp, Finance And Cfo, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Names 2
Group Practice 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Trinity Health Mid-atlantic Medical Group is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
644Medicare enrollment records show 644 clinicians reassign Medicare billing to Trinity Health Mid-Atlantic Medical Group, which bills Medicare for the services they deliver. Of these, 19 practice at this address and 148 within 10 miles. Listed here are the 20 practicing nearest to this location.
Clinicians by Medicare Specialty 35
Nearest to this location (20)
See all 644Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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 Trinity Health Mid-Atlantic Medical Group's NPI number?
The NPI number for Trinity Health Mid-Atlantic Medical Group is 1447776729. It was assigned to this organization in the NPPES registry on August 17, 2017. The provider is doing business as Mercy Management of Southeastern Pennsylvania and THMA MG Infectious Disease Darby.
Where is Trinity Health Mid-Atlantic Medical Group located?
Trinity Health Mid-Atlantic Medical Group is located at 1501 Lansdowne Ave Ste 207, Darby, PA 19023. The listed phone number is (610) 237-5817.
What is Trinity Health Mid-Atlantic Medical Group's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.
Is Trinity Health Mid-Atlantic Medical Group enrolled in Medicare?
Yes. Trinity Health Mid-Atlantic Medical Group is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Trinity Health Mid-Atlantic Medical Group?
According to the CMS Revalidation Reassignment List (October 2026 release), 644 clinicians in 35 Medicare specialties reassign their Medicare billing to Trinity Health Mid-Atlantic Medical Group. A 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 the clinician's services. The largest specialties are Nurse Practitioner (123), Internal Medicine (88) and Hospitalist (68). Of these, 19 practice at this address and 148 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
What insurance does Trinity Health Mid-Atlantic Medical Group accept?
Health plans from Ambetter Health, Ambetter Health of Delaware and Ambetter from Buckeye Health Plan list Trinity Health Mid-Atlantic Medical Group 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.
When was this NPI record last updated?
The NPPES record for Trinity Health Mid-Atlantic Medical Group was last updated on March 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.
# Trinity Health Mid-Atlantic Medical Group · NPI 1447776729
Infectious Disease organization in Darby, Pennsylvania. Organization record, active in the CMS NPPES registry since August 17, 2017.
## Identity
- **NPI:** 1447776729 (Entity type: Organization)
- **Enumerated:** August 17, 2017
- **Primary specialty:** Internal Medicine - Infectious Disease · taxonomy 207RI0200X
- **Also known as:** Mercy Management of Southeastern Pennsylvania (Doing Business As); THMA MG Infectious Disease Darby (Doing Business As)
- **Organization subpart:** No
- **Authorized official:** Julie Keese, VP, FINANCE AND CFO
## Practice location
- **Address:** 1501 LANSDOWNE AVE STE 207, Darby, PA 19023-1333
- **Phone:** (610) 237-5817 · **Fax:** (610) 237-5819
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 644 clinicians in 35 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Nurse Practitioner (123), Internal Medicine (88), Hospitalist (68); 19 practice at this address and 148 within 10 miles; [full list](https://npiprofile.com/npi/1447776729/clinicians) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** March 13, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1447776729) · Data from the CMS NPPES public registry.