Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Gregory Mayro, MD

Individual provider Internal Medicine Physician · NPI 1306031208

Gregory Mayro, MD is a Hospitalist in Philadelphia, Pennsylvania. Graduated from Jefferson Medical College of Thomas Jefferson University in 2001, 25 years ago. Practices with University of Penn-Medical Group, a 3,401-clinician group and accepts Medicare assignment. Licensed in Pennsylvania.

Years since qualifying
25
Trained at
Jefferson Medical College of Thomas Jefferson University
Licensed in
PA
In the registry since
2007
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

3400 Spruce St 5 Maloney
Philadelphia, PA 19104-4206
Phone: (215) 662-4000
Fax: (215) 254-3289
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence MD423087 (PA)
Internal Medicine Physician Taxonomy 207R00000X · Licence MD423087 (PA)
Infectious Disease Physician Taxonomy 207RI0200X · Licence MD423087 (PA)

Record details

NPI number1306031208
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 13, 2007
Last updated in NPPESMay 1, 2019

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyHOSPITALIST
Also practisesINFECTIOUS DISEASE, INTERNAL MEDICINE
Medical schoolJEFFERSON MEDICAL COLLEGE OF THOMAS JEFFERSON UNIVERSITY
Graduated 2001 (25 years in practice)
Group practice University Of Penn-Medical Group — 3401 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients65
Services billed 323 a service is one billed item, such as a visit, a test or a procedure
Average patient age71

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Also affiliated with 1 long-term care hospital, which CMS identifies by certification number only.

Colleagues at University of Penn-Medical Group

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 3401 clinicians in the practice; 12 are shown here.

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