Physician Profile
Unclaimed ProfileAbout GRENIS
Michael Steven Grenis, MD is a healthcare provider in Princeton, NJ specialising in orthopedic surgery. Michael trained at New York Medical College, graduating in 1984. Michael is also listed as specialising in orthopaedic surgery.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Common questions
What does Dr. Grenis specialise in?
Dr. Grenis is an orthopedic surgeon in Princeton, NJ. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “ORTHOPEDIC SURGERY”.
NPI registry
Where is Dr. Grenis located?
Dr. Grenis is listed at 325 PRINCETON AVE, Princeton, NJ 08540. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Grenis's phone number?
The number on file is (609) 924-8131. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Grenis's NPI number?
Dr. Grenis's National Provider Identifier is 1669546834. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Grenis go to medical school?
Dr. Grenis attended New York Medical College, graduating in 1984. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Grenis been practising?
Dr. Grenis has 42 years experience. Calculated from a graduation year of 1984, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Grenis do most often?
According to Medicare billing data, Dr. Grenis performs procedures including injection into tendon or ligament, aspiration and/or injection of fluid from small joint and release and/or relocation of hand nerve; reads or performs imaging such as x-ray of hand, minimum of 3 views and x-ray of wrist, minimum of 3 views, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Grenis confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Grenis. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (609) 924-8131
- Email not available
Practice Locations
325 PRINCETON AVE
Princeton, NJ 08540
Procedures Most Often Billed to Medicare
10,758 services · 2,026 patients · 18 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Injection into tendon or ligament | Procedure | 20550 |
226 |
| Aspiration and/or injection of fluid from small joint | Procedure | 20600 |
102 |
| Release and/or relocation of hand nerve | Procedure | 64721 |
37 |
| Injection of carpal tunnel | Procedure | 20526 |
37 |
| Application of elbow to finger cast | Procedure | 29075 |
29 |
| Aspiration and/or injection of fluid from medium joint | Procedure | 20605 |
20 |
| Release of tendon of palm or finger | Procedure | 26440 |
12 |
| X-ray of hand, minimum of 3 views | Imaging | 73130 |
182 |
| X-ray of wrist, minimum of 3 views | Imaging | 73110 |
182 |
| X-ray of finger, minimum of 2 views | Imaging | 73140 |
96 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
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Claim this profileRelated providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other orthopedic surgeons at this location 8
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 7
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 25 related providers in 4 groups
Trained at New York Medical College 8
Other providers in the same specialty who trained at the same institution.
Class of 1984 at New York Medical College 8
Providers who graduated from the same medical school in the same year.
Also performs Injection into tendon or ligament 8
Providers in NJ who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.