Gregory Mayro, MD
Hospitalist Physician · Philadelphia, PA
Gregory Mayro, MD is a hospitalist physician with a practice address in Philadelphia, Pennsylvania, and NPI 1306031208, issued on Sep 13, 2007. Check the license (Pennsylvania MD423087, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Gregory Mayro
- Credential
- MD
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- MD423087 PA
Self-reported in NPPES; status is on the state search - Practice location
- 3400 Spruce St, Philadelphia, PA 19104
- Phone
- (215) 662-4000
- Enumerated
- Sep 13, 2007
- Record last updated
- May 1, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (215) 254-3289
- Medicaid ID
- 102020604 0001 PA
- Medicare enrollment
- Enrolled (PECOS I20071018000043); accepts Medicare assignment
- Medical or professional school
- Jefferson Medical College Of Thomas Jefferson University, 2001
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 1,424 in Pennsylvania → Look up another NPI →
Also registered at 3400 Spruce St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Megan Abbott, CRNPNurse Practitioner1396771689
- Michael Abboud, MDEmergency Medicine Physician1962820852
- Emily AbdelmessihPediatric Pharmacist1891612560
- Mohammed AbdullahStudent in an Organized Health Care Education/Training Program1013595495
- Amin Abedini, MDStudent in an Organized Health Care Education/Training Program1912609017
- Farid Aboharb, MD, PHDStudent in an Organized Health Care Education/Training Program1295595973
Verify Gregory Mayro in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD423087Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 85.5 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- University OF Penn - Medical GroupPhiladelphia, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory Mayro among 1,424 hospitalist physician records in Pennsylvania
Gregory Mayro, MD is one of 1,424 hospitalist physician records with a practice address in Pennsylvania. 94% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 17% of them.
- NPI issued2007 · 17% of these records are older, 77% newer
- In a Medicare fileYes · 94% of these records are
- In the CMS Doctors and Clinicians fileYes · 87% of these records are
- Graduated2001 · median 2011 among the 1,236 with a school on file
- Record last updated2019 · 36% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in Pennsylvania
There are 1,424 hospitalist physician records in Pennsylvania.
All 1,424 in Pennsylvania → Every provider in Philadelphia → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Susan Day, MDPhiladelphia, PA 191041992737290
- Carmen Guerra, MDPhiladelphia, PA 191041356373781
- Todd Hecht, MDPhiladelphia, PA 191041841227014
- David Horowitz, MDPhiladelphia, PA 191041679505036
- Michelle Hu, MDPhiladelphia, PA 191041891721593
- Emmanuel King, MDPhiladelphia, PA 191041598753469
- Laura Kosseim, MDPhiladelphia, PA 191041912933607
- Philip Masters, MDPhiladelphia, PA 191041265481634
Common questions
What is Gregory Mayro, MD's NPI number?
Gregory Mayro, MD's National Provider Identifier (NPI) is 1306031208, issued on Sep 13, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Mayro, MD located?
The NPPES record lists a practice address at 3400 Spruce St, Philadelphia, PA, 19104. Phone: (215) 662-4000. Providers update this record themselves, so call before visiting.
How can I verify Gregory Mayro, MD's license?
NPPES lists Pennsylvania license number MD423087, as entered by the provider. Search the Pennsylvania Department of State (PALS) at https://www.pals.pa.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
What is Gregory Mayro, MD's MIPS final score?
The 2023 MIPS final score is 85.5 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.