MARYGAIL CATHERINE MULLER
NPI 1992515589
Nurse Practitioner in Bryn Mawr, PA
About Marygail Catherine Muller NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARYGAIL CATHERINE MULLER (NPI 1992515589) is an individual nurse practitioner in Bryn Mawr, Pennsylvania, licensed in Pennsylvania (SP031465) and active in the NPI registry since January 2025. She is enrolled in Medicare PECOS, is affiliated with Bryn Mawr Hospital, and maintains a secondary practice location in Bryn Mawr.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
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
Marygail Catherine Muller 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 Reassignment
Medicare enrollment records show Marygail Muller reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Newtown Square, PA 19073
- Reassigned Medicare billing, Pennsylvania enrollment
- 1,638 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.
Hospital Affiliations CMS Care Compare 4
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Bryn Mawr Hospital
Acute Care Hospitals · Bryn Mawr, PAPaoli Hospital
Acute Care Hospitals · Paoli, PAMain Line Hospital Lankenau
Acute Care Hospitals · Wynnewood, PARiddle Memorial Hospital
Acute Care Hospitals · Media, PAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 19010 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 3
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BRYN MAWR, PA 19010
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 Marygail Muller's NPI number?
The NPI number for Marygail Muller is 1992515589. It was assigned to this individual provider in the NPPES registry on January 7, 2025.
Where is Marygail Muller located?
Marygail Muller practices at 135 S Bryn Mawr Ave Ste 100, Bryn Mawr, PA 19010. The listed phone number is (610) 525-1061.
What is Marygail Muller's specialty?
The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.
Is Marygail Muller enrolled in Medicare?
Yes. Marygail Muller 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 organization bills Medicare for Marygail Muller's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Marygail Muller reassigns Medicare benefits to Main Line Healthcare (Newtown Square, PA). The 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 Marygail Muller's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Marygail Muller accept?
Health plans from Highmark Blue Cross Blue Shield Delaware list Marygail Muller 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 Marygail Muller affiliated with any hospitals?
According to CMS data, Marygail Muller is affiliated with Bryn Mawr Hospital, Paoli Hospital, Main Line Hospital Lankenau and Riddle Memorial Hospital.
When was this NPI record last updated?
The NPPES record for Marygail Muller was last updated on February 19, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 20 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.
# Marygail Catherine Muller · NPI 1992515589
Nurse Practitioner physician in Bryn Mawr, Pennsylvania. Individual provider, active in the CMS NPPES registry since January 7, 2025.
## Identity
- **NPI:** 1992515589 (Entity type: Individual)
- **Enumerated:** January 7, 2025
- **Primary specialty:** Nurse Practitioner · taxonomy 363L00000X
- **State license:** SP031465 (Pennsylvania)
- **Sole proprietor:** No
## Practice location
- **Address:** 135 S BRYN MAWR AVE STE 100, Bryn Mawr, PA 19010-3129
- **Phone:** (610) 525-1061
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Main Line Healthcare (NPI 1922077643, Newtown Square, PA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2024
## Record status
- **NPPES last updated:** February 19, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1992515589) · Data from the CMS NPPES public registry.