Quick answers
- Does Gregory K. Deirmengian accept Medicare assignment?
- Yes. Medicare's clinician data says Gregory K. Deirmengian accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Gregory K. Deirmengian see?
- In 2024, CMS data shows 651 Original Medicare patients and 5,722 services for Gregory K. Deirmengian. This counts Original Medicare only and measures volume, not quality.
- What is Gregory K. Deirmengian's NPI number?
- 1730249517. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Gregory K. Deirmengian, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 651 |
|---|---|
| Services billed to Medicare | 5,722 |
| Different services or procedures | 39 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Hyaluronan or derivative, trivisc, for intra-articular injection, 1 mg (J7329)3,175 services
- X-ray of knee, 3 views (73562)331 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)284 services
- X-ray of hip, 2-3 views (73502)283 services
- Injection, triamcinolone acetonide, not otherwise specified, 10 mg (J3301)228 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Arthritis75%
- Diabetes29%
- Ischemic heart disease28%
- Anxiety27%
Hospitals where Gregory K. Deirmengian works
Medicare's Facility Affiliation Data lists Gregory K. Deirmengian at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Inspira Medical Center Mullica HillElmer, NJ · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 310069
- Jefferson Stratford HospitalStratford, NJ · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 310086
- Thomas Jefferson University HospitalPhiladelphia, PA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 390174
- West Jersey HospitalVoorhees, NJ · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 310022
Practice locations
Addresses where Gregory K. Deirmengian is enrolled with Medicare (CMS data updated October 2, 2026).
- 234 Mall Blvd, Suite G 10King Of Prussia, PA 19406 (610) 755‑3080
- 925 Chestnut St, Fl 5Philadelphia, PA 19107 (267) 339‑3500
- 999 Route 73 N, Suite 401Marlton, NJ 08053 (800) 321‑9999
Group practices
Medicare enrollment lists Gregory K. Deirmengian as a member of these groups (CMS data updated October 2, 2026).
- Reconstructive Orthopaedic Associates II LLC281 clinicians in the group
- Rothman Orthopaedics of New Jersey, LLC176 clinicians in the group
Specialties
- Orthopedic Surgeryprimary
Other orthopedic surgeons in King Of Prussia
Clinicians with the same Medicare primary specialty in King Of Prussia, PA — not a recommendation.
Other clinicians in Reconstructive Orthopaedic Associates II LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Perelman School Of Med At The University Of Pennsylvania |
| Graduation year | 2004 (22 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1730249517 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians