DR. GREGORY CHARLES MALLO M.D.
NPI 1245412295
Orthopaedic Surgery in East Setauket, NY

Q: What is Gregory Mallo's NPI number?

The NPI number for Gregory Mallo is 1245412295. It was assigned to this individual provider in the NPPES registry on December 1, 2007.

Q: What is Gregory Mallo's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery with taxonomy code 207X00000X.

Q: When was this NPI record last updated?

The NPPES record for Gregory Mallo was last updated on November 18, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since December 01, 2007PECOS EnrolledAccepts Medicare Assignment

91.25/100

CMS Quality Rating

6 TECHNOLOGY DR 100, EAST SETAUKET, NY 11733(631) 689-6698(631) 751-5548 Get Directions Write a Review

NPPES record last updated: November 18, 2015. Verified against the NPPES registry weekly; last sync: October 18, 2026.

On this page

About Dr. Gregory Charles Mallo M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. GREGORY CHARLES MALLO M.D. (NPI 1245412295) is an individual orthopaedic surgery provider in East Setauket, New York, licensed in New York (280603) and active in the NPI registry since December 2007. He is enrolled in Medicare PECOS, is affiliated with John T Mather Memorial Hospital Of Port Jefferson, and is a graduate of Jefferson Medical College Of Thomas Jefferson University (2005).

NPPES Registry Identity

NPI1245412295

Entity TypeIndividualMale

Primary Taxonomy207X00000X

Provider Legal NameDR. GREGORY CHARLES MALLOCredential: M.D.

Location Address6 TECHNOLOGY DR 100East Setauket, NY 11733-4079

Mailing Address6 Technology Dr 100East Setauket, NY 11733-4079 · (631) 689-6698 · Fax (631) 751-5548

Phone(631) 689-6698

Fax(631) 751-5548

Sole ProprietorNo

Medical School CMSJefferson Medical College Of Thomas Jefferson UniversityGraduated 2005

Enumeration DateDecember 1, 2007

Last NPPES UpdateNovember 18, 2015

✔ NPI 1245412295 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOrthopaedic SurgeryAllopathic & Osteopathic Physicians

Taxonomy Code207X00000X

License✔ Licensed in NY · 280603

Definition

An orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated structures by medical, surgical and physical means. An orthopaedic surgeon is involved with the care of patients whose musculoskeletal problems include congenital deformities, trauma, infections, tumors, metabolic disturbances of the musculoskeletal system, deformities, injuries and degenerative diseases of the spine, hands, feet, knee, hip, shoulder and elbow in children and adults. An orthopaedic surgeon is also concerned with primary and secondary muscular problems and the effects of central or peripheral nervous system lesions of the musculoskeletal system.

6 TECHNOLOGY DR 100, East Setauket, NY 11733

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Other Identifiers 1

Medicare UPIN1245412295

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Gregory Charles Mallo M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID7315179983

PECOS Enrollment IDI20150831000103

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Gregory Mallo reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

True North Medical Group PC

31 mi

Orthopaedic Surgery

1728 SUNRISE HWY
Merrick, NY 11566

Reassigned Medicare billing, New York enrollment
178 clinicians in this Medicare group

NPI 1659883486 (516) 992-4700

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 19

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

1,116 services518 patients

X-ray of shoulder, minimum of 2 views 73030

An X-ray of the shoulder, with a minimum of 2 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of your shoulder bones. This helps in diagnosing conditions like fractures, arthritis, or other abnormalities. The procedure is quick and painless.

597 services404 patients

Aspiration and/or injection of fluid large joint using ultrasound guidance 20611

This procedure involves using ultrasound technology to accurately locate a large joint, usually the knee or shoulder. A needle is then inserted to either extract fluid (aspiration) or inject medication. The ultrasound helps ensure precision and safety.

448 services243 patients

Injection, triamcinolone acetonide, not otherwise specified, 10 mg J3301

Triamcinolone acetonide is a medication used to reduce inflammation in the body. It's given as a 10 mg injection for conditions like allergies, arthritis, or skin problems. The injection helps to decrease swelling, redness, and itching.

338 services253 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

232 services232 patients

Hyaluronan or derivative, orthovisc, for intra-articular injection, per dose J7324

Orthovisc is a treatment involving injections of a substance called hyaluronan into your joints. Hyaluronan is a natural substance in your joint fluid that aids in movement and reduces pain. The Orthovisc injections help replenish this substance, relieving joint pain.

153 services42 patients

Aspiration and/or injection of fluid from large joint 20610

This procedure involves using a needle to remove (aspiration) or introduce (injection) fluid into a large joint like the knee or hip. It can help diagnose conditions, relieve discomfort, or deliver medication directly to the joint.

149 services129 patients

Anchoring of biceps tendon 23430

Anchoring of the biceps tendon is a surgical procedure aimed at restoring stability to your arm. The surgeon secures your biceps tendon to the bone using special anchors, which helps to reduce pain and improve arm function.

90 services90 patients

Prosthetic repair of shoulder joint, total shoulder 23472

Total shoulder prosthetic repair is a surgical procedure to replace a damaged shoulder joint with artificial components. It aims to relieve pain and restore mobility. The procedure involves replacing the ball (humeral head) and socket (glenoid) of the shoulder joint.

80 services79 patients

X-ray of shoulder blade 73010

An X-ray of the shoulder blade is a quick, painless test that produces images of the bones in your shoulder area. It helps identify fractures, infections, or other abnormalities. You'll need to stay still while a machine sends a small amount of radiation through your shoulder to capture the image.

77 services71 patients

Injection, methylprednisolone acetate, 80 mg J1040

Methylprednisolone acetate is a strong anti-inflammatory medication. It is often given as an 80 mg injection to reduce inflammation and pain. It's commonly used for conditions like arthritis, allergic disorders, or other inflammatory diseases.

65 services60 patients

Injection, methylprednisolone acetate, 40 mg J1030

Methylprednisolone acetate is a medication given through an injection. It's a type of corticosteroid, which reduces inflammation and immune responses. It can be used to treat various conditions like arthritis, allergies, and skin diseases. This dose is 40 mg.

45 services41 patients

Shaving of part of shoulder bone and repair of ligament using an endoscope 29826

This procedure involves using a tiny camera, called an endoscope, to view and repair a damaged shoulder ligament. Simultaneously, a small portion of the shoulder bone is shaved to alleviate discomfort and improve movement. It's a minimally invasive technique that aids in a quicker recovery.

28 services27 patients

Removal of extensive shoulder joint tissue using an endoscope 29823

This procedure, known as arthroscopic debridement, involves using a small camera (endoscope) to view your shoulder joint. Damaged or unwanted tissue is then carefully removed. This minimally invasive technique aims to reduce pain and improve joint mobility.

25 services24 patients

Repair of shoulder rotator cuff using an endoscope 29827

This procedure, known as arthroscopic rotator cuff repair, helps fix tears in the shoulder's rotator cuff. An endoscope, a small camera, is used to view the shoulder inside. Using small tools, the surgeon repairs the torn tissue. This minimally invasive approach often leads to a quicker recovery.

19 services19 patients

X-ray of upper spine, 2-3 views 72040

An X-ray of the upper spine, with 2-3 views, is a painless procedure that employs a small amount of radiation to capture images of your neck and upper back. It assists in diagnosing conditions like arthritis, fractures, or spinal deformities.

18 services18 patients

Removal of entire shoulder joint lining using an endoscope 29821

This procedure involves the use of an endoscope, a small camera, to view and remove the lining of your shoulder joint. It's typically done to alleviate pain or discomfort caused by conditions like arthritis or inflammation.

17 services17 patients

Repair of wound of scalp, arms, or legs by transferring skin, 10.1-30.0 sq cm 14021

This procedure involves repairing a wound on your scalp, arm, or leg by moving skin from another part of your body. The skin transferred will cover an area between 10.1 to 30.0 square cm. This helps promote healing and reduce scarring.

15 services15 patients

Partial removal of collar bone at shoulder using an endoscope 29824

This procedure involves the partial removal of the collar bone at the shoulder using an endoscope, a tool with a light and camera. It's done to relieve pain or improve shoulder movement. The surgeon makes small incisions, then uses the endoscope to guide their work.

12 services11 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

John T Mather Memorial Hospital Of Port Jefferson

Acute Care Hospitals · Port Jefferson, NY

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number330185

Location75 North Country RoadPort Jefferson, NY 11777 · Suffolk County

Emergency services

St Charles Hospital

Acute Care Hospitals · Port Jefferson, NY

4/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number330246

Location200 Belle Terre RoadPort Jefferson, NY 11777 · Suffolk County

Birthing friendly

Suny/Stony Brook University Hospital

Acute Care Hospitals · Stony Brook, NY

4/5 CMS rating

OwnershipGovernment - State

CMS Certification Number330393

LocationHealth Sciences Center SunyStony Brook, NY 11794 · Suffolk County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 11733 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$105.06 typical visit price

range $67.40 – $203.53

Typical copayment $26.26 (range $16.85 – $50.88)

Most-billed visit code 99203

Established Patient

$83.44 typical visit price

range $21.66 – $164.45

Typical copayment $20.86 (range $5.41 – $41.11)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

91.25/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored through an Alternative Payment Model

Quality

74.92

Promoting Interoperability

91.67

Improvement Activities

Referred Medical Equipment & Supplies CMS DME claims

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Shoulder elbow wrist hand orthosis, abduction positioning, airplane design, prefabricated, includes fitting and adjustment L3960

DME-Orthotic Devices · category DF000N

2 suppliers17 claims17 services$563.67 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Gregory Mallo's NPI number?

The NPI number for Gregory Mallo is 1245412295. It was assigned to this individual provider in the NPPES registry on December 1, 2007.

Where is Gregory Mallo located?

Gregory Mallo practices at 6 Technology Dr 100, East Setauket, NY 11733. The listed phone number is (631) 689-6698.

What is Gregory Mallo's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery with taxonomy code 207X00000X.

Is Gregory Mallo enrolled in Medicare?

Yes. Gregory Mallo is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Is Gregory Mallo affiliated with any hospitals?

According to CMS data, Gregory Mallo is affiliated with John T Mather Memorial Hospital Of Port Jefferson, St Charles Hospital and Suny/Stony Brook University Hospital.

When was this NPI record last updated?

The NPPES record for Gregory Mallo was last updated on November 18, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.