Michael Steven Grenis, MD
Orthopaedic Surgery Physician · Princeton, NJ
Michael Steven Grenis, MD is an orthopaedic surgery physician with a practice address in Princeton, New Jersey, and NPI 1669546834, issued on Nov 20, 2006. Check the license (New Jersey 25MA05473100, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Michael Steven Grenis
- Credential
- MD
- Primary taxonomy
- Orthopaedic Surgery Physician 207X00000X
- License numbers
- 25MA05473100 NJ
MD442362 PA
Self-reported in NPPES; status is on the state search - Practice location
- 325 Princeton Ave, Princeton, NJ 08540
- Phone
- (609) 924-8131
- Enumerated
- Nov 20, 2006
- Record last updated
- Sep 30, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (609) 924-8532
- Medicare enrollment
- Enrolled (PECOS I20110804000237); accepts Medicare assignment
- Medical or professional school
- New York Medical College, 1984
- Entity
- Type 1 · individual
8 nearest orthopaedic surgery physician records → All 690 in New Jersey → Look up another NPI →
Also registered at 325 Princeton Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Adam Abel, PTAPhysical Therapy Assistant1659840023
- Jeffrey Abrams, MDOrthopaedic Surgery Physician1386658011
- Morgan Albrecht, PA-CPhysician Assistant1508453663
- Jon Ark, M.D.Orthopaedic Surgery Physician1871513176
- Craig Batten, OTPhysical Medicine & Rehabilitation Physician1891766929
- Hari Bezwada, MDOrthopaedic Surgery Physician1861426835
Verify Michael Steven Grenis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Jersey State Board of Medical Examiners
Search for license 25MA05473100Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
59% fewer Medicare Part D claims than the average orthopaedic surgery physician in 2024
141 Medicare Part D claims for 117 beneficiaries, against an average of 346 among the 16,516 providers of this specialty who prescribed in Part D. 84 claims were for opioids.
Most prescribed
- Oxycodone-Acetaminophen69 claims
- Meloxicam24 claims
- Cephalexin11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $50.11
2 payments; by number, the most common kind was food and beverage; the largest payer was Bioventus LLC. The 15,003 providers of this specialty with any payment received $23,022.89 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Orthonj LLCPrinceton, NJ
- Phoenix Rehabilitation And Health Services IncCranberry Township, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael Steven Grenis among 690 orthopaedic surgery physician records in New Jersey
Michael Steven Grenis, MD is one of 690 orthopaedic surgery physician records with a practice address in New Jersey. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 12% of them.
- NPI issued2006 · 12% of these records are older, 42% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated1984 · median 2001 among the 444 with a school on file
- Record last updated2019 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207X00000X and a New Jersey practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
25 orthopaedic surgery physician records list a practice address in Princeton
They are 25 of the 1,622 NPPES records with a practice address in Princeton, and 690 orthopaedic surgery physician records in New Jersey.
All 690 in New Jersey → Every provider in Princeton → Orthopaedic Surgery Physician nationwide →
The 8 orthopaedic surgery physician records with the nearest ZIP codes
- Jeffrey Abrams, MDPrinceton, NJ 085401386658011
- Jon Ark, M.D.Princeton, NJ 085401871513176
- Hari Bezwada, MDPrinceton, NJ 085401861426835
- Richard Fleming, M.D.Princeton, NJ 085401649290917
- Steven Gecha, M.D.Princeton, NJ 085401710906698
- Walter Gutowski, M.D.Princeton, NJ 085401205855061
- Steven Kahn, D.O.Princeton, NJ 085401164461356
- David Lamb, M.D.Princeton, NJ 085401023037959
Common questions
What is Michael Steven Grenis, MD's NPI number?
Michael Steven Grenis, MD's National Provider Identifier (NPI) is 1669546834, issued on Nov 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael Steven Grenis, MD located?
The NPPES record lists a practice address at 325 Princeton Ave, Princeton, NJ, 08540. Phone: (609) 924-8131. Providers update this record themselves, so call before visiting.
How can I verify Michael Steven Grenis, MD's license?
NPPES lists New Jersey license number 25MA05473100, as entered by the provider. Search the New Jersey State Board of Medical Examiners at https://newjersey.mylicense.com/verification/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Michael Steven Grenis, MD prescribe under Medicare Part D?
In 2024, Michael Steven Grenis, MD had 141 Medicare Part D claims for 117 beneficiaries; the average among orthopaedic surgery physician prescribers was 346. Part D covers Medicare prescriptions only.
What is Michael Steven Grenis, MD's MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.