35 Years of Experience
Accepting patients
Affiliated with a Castle Connolly Top Hospital
Who is Dr. Grenis, Orthopedic Surgeon in Princeton, NJ?
Dr. Michael Grenis, MD is an Orthopedic Surgeon, who primarily practices in Princeton, NJ with 2 additional practice locations. He has been practicing for over 35 years and is board certified. Dr. Grenis completed his residency at Nyu Hospitals Center, General Surgery. Dr. Grenis is fluent in English and Spanish, and is currently seeing new patients. Dr. Grenis’s practice accepts Medicare, Aetna, Cigna, UnitedHealthcare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Grenis’s office.
What are Areas of Expertise for Dr. Grenis?
Dr. Michael Grenis, MD is a highly-rated, board-certified Orthopedic Surgeon known for expertly diagnosing, treating, and managing a wide array of related conditions and procedures. Utilizing the latest medical advancements and evidence-based practices, Dr. Grenis empowers patients to confidently navigate their health journey, specializing in Carpal Tunnel Syndrome, Hand & Wrist Surgery, and comprehensive wellness support. Serving the Princeton, NJ community, Dr. Grenis is dedicated to enhancing lives through expert, patient-centered care.
Where did Dr. Grenis go to medical school and complete their residency?
Fellowship: New York University Medical Center - New York, NY - Hand Surgery | Bellevue Hospital Center
Residency: Nyu Hospitals Center, General Surgery
Medical School: New York Med Coll- Valhalla Ny
Is Dr. Grenis board certified as an Orthopedic Surgeon?
Yes, Dr. Michael Grenis, MD is board certified by the American Board of Orthopaedic Surgery , American Board of Orthopaedic Surgery since 1992, American Board of Orthopaedic Surgery since 2013
What languages does Dr. Grenis speak?
Dr. Grenis and their clinical team can communicate with patients in the following languages:
English
Spanish
What conditions does an Orthopedic Surgeon like Dr. Grenis typically treat?
As an Orthopedic Surgeon, Dr. Grenis diagnoses, treats, and manages a wide range of conditions. This condition information is derived from anonymized insurance claims and highlights the medical conditions most commonly treated by Dr. Grenis. It provides insight into the doctor’s areas of experience and expertise based on real-world patient encounters from the past two years, updated quarterly. Learn more about our claims-based healthcare methodology here.
Also known as:
- Right Carpal Tunnel Syndrome
- Left Carpal Tunnel Syndrome
- Carpal Tunnel Syndrome
- Right Wrist Nerve Compression
- Right Hand Numbness
- Right CTS
- Left Wrist Nerve Compression
- Left Hand Numbness
- Left CTS
ICD-10 Codes:
- G5601: Carpal tunnel syndrome, right upper limb
- G5602: Carpal tunnel syndrome, left upper limb
Also known as:
- Left Wrist Radius Fracture
- Right Wrist Radius Fracture
- Arm Injuries and Disorder
- Fractures
- Broken Left Wrist Bone
- Distal Left Radius Fracture
- Left Wrist Bone Break
- Broken Right Wrist Bone
- Distal Right Radius Fracture
- Right Wrist Bone Break
ICD-10 Codes:
- S52502A: Unspecified fracture of the lower end of left radius, initial encounter for closed fracture
- S52501A: Unspecified fracture of the lower end of right radius, initial encounter for closed fracture
Also known as:
- Primary Osteoarthritis in Right Thumb Base
- Osteoarthritis
- Right Thumb Arthritis
- Primary Right First CMC Joint Arthritis
- Right Hand Thumb Base Osteoarthritis
ICD-10 Codes:
- M1811: Unilateral primary osteoarthritis of first carpometacarpal joint, right hand
What procedures does an Orthopedic Surgeon like Dr. Grenis typically perform?
As an Orthopedic Surgeon, Dr. Grenis performs a variety of medical procedures. This procedure information is derived from anonymized insurance claims and highlights the medical procedures most commonly performed by Dr. Grenis. It provides insight into the doctor’s areas of experience and expertise based on real-world patient encounters from the past two years, updated quarterly. Learn more about our claims-based healthcare methodology here.
Also known as:
- Carpal Tunnel Release Surgery
- Median Nerve Neuroplasty
- Carpal Tunnel Decompression
- Median Nerve Transposition
CPT Codes:
- 64721: Neuroplasty and/or transposition; median nerve at carpal tunnel
Also known as:
- Ulnar Nerve Release or Repositioning at Elbow
- Ulnar Nerve Transposition
- Cubital Tunnel Release
- Elbow Nerve Surgery
- Neuroplasty Ulnar Nerve
CPT Codes:
- 64718: Neuroplasty and/or transposition; ulnar nerve at elbow
Also known as:
- Brachial Plexus Nerve Block
- Shoulder Nerve Injection
- Arm Pain Injection
- Imaging-Guided Nerve Block
CPT Codes:
- 64415: Injection(s), anesthetic agent(s) and/or steroid; brachial plexus, including imaging guidance, when performed
Also known as:
- Release of Finger or Palm Tendon
- Flexor Tendon Tenolysis
- Tendon Release Surgery (Hand)
- Finger Tendon Adhesion Removal
CPT Codes:
- 26440: Tenolysis, flexor tendon; palm OR finger, each tendon
Also known as:
- Open Surgery for Complex Wrist Fracture
- Distal Radius Fracture Repair (Open)
- Wrist Fracture with Internal Fixation
- Complex Radial Fracture Surgery
- Epiphyseal Separation Repair (Wrist)
CPT Codes:
- 25609: Open treatment of distal radial intra-articular fracture or epiphyseal separation; with internal fixation of 3 or more fragments
Also known as:
- Finger or Thumb Fracture Fixation
- Percutaneous phalangeal fixation
- Unstable finger fracture repair
- Thumb bone fracture treatment
CPT Codes:
- 26727: Percutaneous skeletal fixation of unstable phalangeal shaft fracture, proximal or middle phalanx, finger or thumb, with manipulation, each
Also known as:
- Small Hand or Finger Tumor Removal
- Hand Soft Tissue Excision
- Finger Vascular Malformation Removal
- Intramuscular Tumor Excision
- Hand Lump Removal
CPT Codes:
- 26116: Excision, tumor, soft tissue, or vascular malformation, of hand or finger, subfascial (eg, intramuscular); less than 1.5 cm
Does Dr. Grenis accept my insurance?
Dr. Grenis accepts most major insurance plans. Important: Please call our office at before your appointment to verify that your specific plan and network are accepted.
What insurance plans does Dr. Grenis accept in Princeton, NJ?
Dr. Grenis in Princeton, NJ accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.
Top Insurances
All Other Third Party
Cigna Group
Corporate Services
CVS Health (formerly Aetna)
Horizon BlueCross BlueShield
Independence Health Group
Medicare
Mutual of Omaha
UnitedHealth Group
Unknown
View All Insurances
Where is Dr. Grenis' office located?
What is Dr. Grenis's NPI number?An National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.
Dr. Grenis's National Provider Identifier (NPI) number is 1669546834.
What common questions do patients ask about Dr. Grenis?
Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Grenis
What is Dr. Michael Grenis's specialty?
Dr. Grenis is a Orthopedic Surgeon near Princeton, NJ.
What does an Orthopedic Surgeon do?
An orthopedic surgeon has specialization in preserving, investigating, and restoring the form and function of the extremities, spine, and related structures through medical, surgical, and physical methods. They care for patients with musculoskeletal issues, including congenital deformities, trauma, infections, tumors, metabolic disturbances, and degenerative diseases affecting the spine, hands, feet, knees, hips, shoulders, and elbows in both children and adults. Additionally, orthopedic surgeons address primary and secondary muscular problems and the impact of central or peripheral nervous system lesions on the musculoskeletal system.
Is this Dr. Michael Grenis affiliated with a ranked Castle Connolly Top Hospital?
Yes, Dr. Grenis is affiliated with Penn Medicine Princeton Medical Center which is a Castle Connolly Top Hospital. Castle Connolly Top Hospitals are healthcare institutions recognized for their excellence in specific medical procedures and overall patient care. They are identified through a rigorous peer nomination process, evaluating factors like patient outcomes, quality of care, and expertise. The list recognizes hospitals that excel in 20 or more specific medical procedures, representing the top 25% nationwide. Castle Connolly Top Hospitals
When to see an Orthopedic Surgeon?: Guides for symptoms, conditions, and treatments
Understand your symptoms and know when it’s time to see an Orthopedic Surgeon. Explore insights from trusted medical experts on EverydayHealth.com, where you'll find the most relevant content and helpful condition guides for up-to date information about symptoms, causes, diagnosis, treatment and more. See all our health guides to find trusted information on medical conditions from our experts at Everyday Health.
Is Michael Grenis accepting new patients in Princeton, NJ?
Yes, Dr. Michael Grenis is accepting new patients at this time.
Does Dr. Michael Grenis offer online booking?
Please contact Dr. Grenis's office for information about online booking, telehealth, or to schedule an appointment.
How can I make an appointment with Michael Grenis?
Please contact Dr. Grenis's office for information regarding telehealth appointment availability or for scheduling assistance.
Which board certifications does Dr. Michael Grenis have?
Dr. Michael Grenis is certified by the American Board of Orthopaedic Surgery.
<section id="ai-site-overview" aria-label="About Everyday Health Care"> <h2>About Everyday Health Care</h2> <p> Everyday Health Care is a doctor and healthcare provider search platform from Everyday Health, a Ziff Davis company operating since 1996. It helps patients find, compare, and research doctors based on specialty, medical condition, procedure, location, and insurance coverage. </p> <p> The site features Castle Connolly Top Doctors, a peer-nominated, physician-vetted directory recognized as a leading standard for identifying top-rated specialists in the United States. Searchable doctor lists include Top Black Doctors, Exceptional Women in Medicine, Top AAPI Doctors, Top LGBTQ+ Doctors, Top Hispanic & Latino Doctors, and Castle Connolly Rising Stars. </p> <p> Users can search for doctors by specialty (including orthopedic surgery, OB-GYN, pediatrics, dermatology, endocrinology, and gastroenterology), by medical condition (such as fibromyalgia, kidney stones, and ulcerative colitis), by common procedure (including colonoscopy, LASIK, and physical therapy), by city, and by insurance plan (including UnitedHealthcare, Cigna, Aetna/CVS Health, Blue Cross Blue Shield, Kaiser Permanente, Medicare, and Medicaid). </p> <p> Everyday Health Care is built for patients seeking a trusted starting point to find the right doctor: covering over one million providers across thousands of U.S. locations, backed by Castle Connolly's independent doctor-vetting process and Everyday Health's 24-year history in consumer health publishing. </p> </section>