Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Marygail Catherine Muller
Nurse Practitioner in Bryn Mawr, PA · enumerated 2025.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1992515589
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Registry record
Entity type Individual (Type 1)
Name Marygail Catherine Muller
Sex Female
Practice address 135 S Bryn Mawr Ave Ste 100, Bryn Mawr, PA, 19010
Phone (610) 525-1061
Enumeration date Jan 7, 2025
Last updated in NPPES Feb 19, 2025
Taxonomy & licenses
363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License SP031465 (PA) Primary
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
Is NPI 1992515589 active?
Yes, as of the latest NPPES snapshot, NPI 1992515589 is active (record last updated 2025-02-19).
How do I verify Marygail Muller's NPI record?
Cross-check NPI 1992515589 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-02-19.