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

Gregory Krikor Deirmengian, MD

Individual provider Orthopaedic Surgery Physician · NPI 1730249517

Gregory Krikor Deirmengian, MD practises Orthopedic Surgery in King of Prussia, Pennsylvania. Graduated from Perelman School of Med at the University of Pennsylvania in 2004, 22 years ago. Practices with Reconstructive Orthopaedic Associates II LLC, a 275-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in Florida, New Jersey and Pennsylvania.

Years since qualifying
22
Trained at
Perelman School of Med at the University of Pennsylvania
Licensed in
FL, NJ, PA
In the registry since
2006
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

234 Mall Blvd Ste G30
King of Prussia, PA 19406-2921
Phone: (267) 339-3558
Fax: (267) 339-3763
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 999 Route 73 N Ste 401, Marlton, NJ 08053-1227 — (267) 339-3558
  • 243 Hurffville Crosskeys Rd, Sewell, NJ 08080-4011 — (267) 339-3558

Specialties & licences

Orthopaedic Surgery Physician (primary) Taxonomy 207X00000X · Licence MD430661 (PA)
Orthopaedic Surgery Physician Taxonomy 207X00000X · Licence ME152545 (FL)
Orthopaedic Surgery Physician Taxonomy 207X00000X · Licence 25MA08795400 (NJ)

Record details

NPI number1730249517
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedDecember 11, 2006
Last updated in NPPESFebruary 15, 2022
Certification dateFebruary 15, 2022

Medicare enrollment

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

Medicare specialtyORTHOPEDIC SURGERY
Medical schoolPERELMAN SCHOOL OF MED AT THE UNIVERSITY OF PENNSYLVANIA
Graduated 2004 (22 years in practice)
Group practice Reconstructive Orthopaedic Associates Ii Llc — 275 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Hip replacement 107 times · 98th percentile
Knee replacement 169 times · 98th percentile
Removal of tissue 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

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 patients651
Services billed 5,722 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

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.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $81 2 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

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

Colleagues at Reconstructive Orthopaedic Associates II LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 275 clinicians in the practice; 12 are shown here.

Other providers in King of Prussia