JOHN GABRIEL HORNEFF MD
NPI 1053639302
Orthopaedic Surgery in Philadelphia, PA
About John Gabriel Horneff Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOHN GABRIEL HORNEFF MD (NPI 1053639302) is an individual orthopaedic surgery provider in Philadelphia, Pennsylvania, licensed in Pennsylvania (MD449085) and active in the NPI registry since May 2010. He is enrolled in Medicare PECOS, is affiliated with Hospital Of Univ Of Pennsylvania, and is a graduate of Perelman School Of Med At The University Of Pennsylvania (2010).
NPPES Registry Identity
Specialties & Licenses 2
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
John Gabriel Horneff 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 John Horneff reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Philadelphia, PA 19107
- Reassigned Medicare billing, Pennsylvania enrollment
- 3,488 clinicians in this Medicare group
Cherry Hill, NJ 08034
- Reassigned Medicare billing, New Jersey enrollment
- 15 clinicians in this Medicare group
Marlton, NJ 08053
- Reassigned Medicare billing, New Jersey enrollment
- 398 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 19
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 4
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, PAChester County Hospital
Acute Care Hospitals · West Chester, PAPenn Presbyterian Medical Center
Acute Care Hospitals · Philadelphia, PAPennsylvania Hospital
Acute Care Hospitals · Philadelphia, PAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 19107 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 19107
PHILADELPHIA, PA 19107
PHILADELPHIA, PA 19107
PHILADELPHIA, PA 19107
PHILADELPHIA, PA 19107
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 John Horneff's NPI number?
The NPI number for John Horneff is 1053639302. It was assigned to this individual provider in the NPPES registry on May 12, 2010.
Where is John Horneff located?
John Horneff practices at 925 Chestnut St 5th Floor, Philadelphia, PA 19107. The listed phone number is (267) 339-3500.
What is John Horneff's specialty?
The primary specialty registered for this NPI is Orthopaedic Surgery with taxonomy code 207X00000X.
Is John Horneff enrolled in Medicare?
Yes. John Horneff 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 John Horneff's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Horneff reassigns Medicare benefits to 3 organizations: University Of Penn-Medical Group (Philadelphia, PA), Clinical Health Care Associates Of New Jersey, PC (Cherry Hill, NJ) and Rothman Orthopaedics Of New Jersey, LLC (Marlton, NJ). 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 John Horneff's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does John Horneff accept?
Health plans from Ambetter Health, Ambetter Health of Delaware and Ambetter from Buckeye Health Plan list John Horneff 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 John Horneff affiliated with any hospitals?
According to CMS data, John Horneff is affiliated with Hospital Of Univ Of Pennsylvania, Chester County Hospital, Penn Presbyterian Medical Center and Pennsylvania Hospital.
When was this NPI record last updated?
The NPPES record for John Horneff was last updated on August 10, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.
# John Gabriel Horneff, MD · NPI 1053639302
Orthopaedic Surgery physician in Philadelphia, Pennsylvania. Individual provider, active in the CMS NPPES registry since May 12, 2010.
## Identity
- **NPI:** 1053639302 (Entity type: Individual)
- **Enumerated:** May 12, 2010
- **Primary specialty:** Orthopaedic Surgery · taxonomy 207X00000X
- **State license:** MD449085 (Pennsylvania)
- **Sole proprietor:** No
## Practice location
- **Address:** 925 CHESTNUT ST, 5TH FLOOR, Philadelphia, PA 19107-4216
- **Phone:** (267) 339-3500
## 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 1669860854, Philadelphia, PA); Clinical Health Care Associates Of New Jersey, PC (NPI 1437288263, Cherry Hill, NJ); Rothman Orthopaedics Of New Jersey, LLC (NPI 1215978630, Marlton, NJ) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Perelman School Of Med At The University Of Pennsylvania, class of 2010
## Record status
- **NPPES last updated:** August 10, 2016
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Source: [NPI Profile](https://npiprofile.com/npi/1053639302) · Data from the CMS NPPES public registry.