GREGORY MAYRO MD
NPI 1306031208
Hospitalist in Philadelphia, PA
About Gregory Mayro Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GREGORY MAYRO MD (NPI 1306031208) is an individual hospitalist provider in Philadelphia, Pennsylvania, licensed in Pennsylvania (MD423087) and active in the NPI registry since September 2007. He is enrolled in Medicare PECOS, is affiliated with Hospital Of Univ Of Pennsylvania, and is a graduate of Jefferson Medical College Of Thomas Jefferson University (2001).
NPPES Registry Identity
Specialties & Licenses 3
Other Identifiers 1
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
Gregory Mayro Md 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 Reassignments
3Medicare enrollment records show Gregory Mayro reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Philadelphia, PA 19104
- Reassigned Medicare billing, Pennsylvania enrollment
- 752 clinicians in this Medicare group
Philadelphia, PA 19104
- Reassigned Medicare billing, Pennsylvania enrollment
- 26 clinicians in this Medicare group
Philadelphia, PA 19145
- Reassigned Medicare billing, Pennsylvania enrollment
- Medicare enrollment name: Clinical Care Associates Of The University Of Pennsylvania Health.
- 983 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.
Areas of Expertise CMS Part B claims 2
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Hospital Of Univ Of Pennsylvania
Acute Care Hospitals · Philadelphia, PAPennsylvania Hospital
Acute Care Hospitals · Philadelphia, PAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 19104 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
PHILADELPHIA, PA 19104
PHILADELPHIA, PA 19104
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 Gregory Mayro's NPI number?
The NPI number for Gregory Mayro is 1306031208. It was assigned to this individual provider in the NPPES registry on September 13, 2007.
Where is Gregory Mayro located?
Gregory Mayro practices at 3400 Spruce St 5 Maloney, Philadelphia, PA 19104. The listed phone number is (215) 662-4000.
What is Gregory Mayro's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Gregory Mayro enrolled in Medicare?
Yes. Gregory Mayro 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 organizations bill Medicare for Gregory Mayro's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Mayro reassigns Medicare benefits to 3 organizations: University Of Penn - Medical Group (Philadelphia, PA), Clinical Health Care Associates Of New Jersey, PC (Philadelphia, PA) and Clinical Care Associates Of The University Of Pennsylvania Health Syst (Philadelphia, PA). Each 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 Gregory Mayro's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Gregory Mayro affiliated with any hospitals?
According to CMS data, Gregory Mayro is affiliated with Hospital Of Univ Of Pennsylvania and Pennsylvania Hospital.
When was this NPI record last updated?
The NPPES record for Gregory Mayro was last updated on May 1, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 years 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.
# Gregory Mayro, MD · NPI 1306031208
Hospitalist physician in Philadelphia, Pennsylvania. Individual provider, active in the CMS NPPES registry since September 13, 2007.
## Identity
- **NPI:** 1306031208 (Entity type: Individual)
- **Enumerated:** September 13, 2007
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** MD423087 (Pennsylvania)
- **Sole proprietor:** No
## Practice location
- **Address:** 3400 SPRUCE ST, 5 MALONEY, Philadelphia, PA 19104-4206
- **Phone:** (215) 662-4000 · **Fax:** (215) 254-3289
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): University Of Penn - Medical Group (NPI 1053447151, Philadelphia, PA); Clinical Health Care Associates Of New Jersey, PC (NPI 1902844806, Philadelphia, PA); Clinical Care Associates Of The University Of Pennsylvania Health Syst (NPI 1508380452, Philadelphia, PA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Jefferson Medical College Of Thomas Jefferson University, class of 2001
## Record status
- **NPPES last updated:** May 1, 2019
- **Other identifiers:** Medicaid 102020604 0001 (PA)
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Source: [NPI Profile](https://npiprofile.com/npi/1306031208) · Data from the CMS NPPES public registry.