Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

JULIAN JOSEPH SONNENFELD M.D.
NPI 1700273943
Orthopaedic Surgery - Sports Medicine in Garden City, NY

Q: What is Julian Sonnenfeld's NPI number?

The NPI number for Julian Sonnenfeld is 1700273943. It was assigned to this individual provider in the NPPES registry on April 24, 2015.

Q: What is Julian Sonnenfeld's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery, specializing in Sports Medicine, with taxonomy code 207XX0005X.

Q: When was this NPI record last updated?

The NPPES record for Julian Sonnenfeld was last updated on November 2, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 days 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 April 24, 2015PECOS Enrolled

91.25/100

CMS Quality Rating

1101 STEWART AVE, GARDEN CITY, NY 11530(516) 536-2800 Get Directions Write a Review

NPPES record last updated: November 2, 2026. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Nov 2, 2026, Oct 12, 2021, Aug 26, 2020 and 1 more (4 updates tracked since 2016).

On this page

About Julian Joseph Sonnenfeld M.d. NPPES

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

JULIAN JOSEPH SONNENFELD M.D. (NPI 1700273943) is an individual sports medicine provider in Garden City, New York, licensed in New York (309553) and active in the NPI registry since April 2015. He is enrolled in Medicare PECOS, is affiliated with North Shore University Hospital, and is a graduate of Tufts University School Of Medicine (2015).

NPPES Registry Identity

NPI1700273943

Entity TypeIndividualMale

Primary Taxonomy207XX0005X

Provider Legal NameJULIAN JOSEPH SONNENFELDCredential: M.D.

Location Address1101 STEWART AVEGarden City, NY 11530-4892

Mailing Address4601 Park Rd Ste 300Charlotte, NC 28209-2290 · (704) 323-2505

Phone(516) 536-2800

Sole ProprietorNo

Medical School CMSTufts University School Of MedicineGraduated 2015

Enumeration DateApril 24, 2015

Last NPPES UpdateNovember 2, 20264 updates tracked since enumeration

NPPES CertifiedNovember 2, 2026

✔ NPI 1700273943 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyOrthopaedic Surgery · Sports MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207XX0005X

License✔ Licensed in NY · 309553

Definition

An orthopaedic surgeon trained in sports medicine provides appropriate care for all structures of the musculoskeletal system directly affected by participation in sporting activity. This specialist is proficient in areas including conditioning, training and fitness, athletic performance and the impact of dietary supplements, pharmaceuticals, and nutrition on performance and health, coordination of care within the team setting utilizing other health care professionals, field evaluation and management, soft tissue biomechanics and injury healing and repair. Knowledge and understanding of the principles and techniques of rehabilitation, athletic equipment and orthotic devices enables the specialist to prevent and manage athletic injuries.

Also ListedOrthopaedic SurgeryTaxonomy 207X00000X · License 309553 (NY), 2020-00487 (NC)

Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X

1101 STEWART AVE, Garden City, NY 11530

Open in Google Maps ↗

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

Julian Joseph Sonnenfeld 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 ID2365789120

PECOS Enrollment IDI20210525002994

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 Reassignments

Medicare enrollment records show Julian Sonnenfeld reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

True North Medical Group PC

5.5 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

Carolinas Medical Center

528 mi

Obstetrics & Gynecology

200 MEDICAL PARK DR, STE 250
Concord, NC 28025

Reassigned Medicare billing, North Carolina enrollment
2,223 clinicians in this Medicare group

NPI 1467790055 (704) 403-6350

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 15

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.

316 services202 patients

Hyaluronan or derivative, euflexxa, for intra-articular injection, per dose J7323

Hyaluronan or Euflexxa is a substance similar to a natural substance in your joints. It's injected into the joint space to treat pain from osteoarthritis, especially in the knee. It helps to lubricate the joint, reducing pain and improving mobility.

243 services52 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.

190 services99 patients

Injection, betamethasone acetate 3 mg and betamethasone sodium phosphate 3 mg J0702

This injection contains two medications, betamethasone acetate and betamethasone sodium phosphate. It is used to reduce inflammation and pain. It's given by a healthcare professional, often directly into the area causing discomfort.

180 services102 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.

135 services73 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.

129 services91 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.

105 services105 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

95 services73 patients

X-ray of knee, 4 or more views 73564

An X-ray of the knee, 4 or more views, is a non-invasive imaging test. It involves capturing multiple images of your knee from different angles. This helps in diagnosing conditions such as fractures, arthritis, or infections. The procedure is quick and painless.

67 services62 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.

36 services32 patients

X-ray of elbow, minimum of 3 views 73080

An elbow X-ray with a minimum of 3 views is a non-invasive imaging test. It helps visualize the bones of the elbow from different angles. This aids in diagnosing conditions like fractures or arthritis. The procedure is quick, painless, and usually takes around 15 minutes.

23 services16 patients

X-ray of hip, 2-3 views 73502

An X-ray of the hip with 2-3 views is a non-invasive imaging test. It uses a small amount of radiation to produce pictures of the hip joint. These images help in diagnosing conditions like fractures, arthritis, or other abnormalities. The process is quick and painless.

17 services14 patients

Closed treatment of broken top of upper arm bone 23600

Closed treatment of a broken top of the upper arm bone involves non-surgical methods to heal the fracture. This may include immobilization with a cast or brace, pain management, and physical therapy exercises to restore movement and strength once healing begins.

13 services13 patients

Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212

This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.

12 services11 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

11 services11 patients

Hospital Affiliations CMS Care Compare 2

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

North Shore University Hospital

Acute Care Hospitals · Manhasset, NY

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number330106

Location300 Community DriveManhasset, NY 11030 · Nassau County

Emergency services Birthing friendly

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

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

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

CLAIRE O COHEN MD

Pediatrics

1101 STEWART AVE, SUITE 306
GARDEN CITY, NY 11530

Nassau County (516) 222-0893

MRS. KIMBERLY POEPPLEIN RN, ATC

Specialist

1101 STEWART AVE
GARDEN CITY, NY 11530

Nassau County (516) 227-5344

DR. KATHRYN ELISE CALABRIA D.O.

Neuromusculoskeletal Medicine & OMM

1101 STEWART AVE, SUITE 1ES
GARDEN CITY, NY 11530

Nassau County (631) 776-0432

YVONNE WOLODZKO MD

Pediatrics

1101 STEWART AVE, SUITE 306
GARDEN CITY, NY 11530

Nassau County (516) 222-0893

DR. BRIAN GOLDSTEIN D.O.

Pain Medicine (Interventional Pain Medicine)

1101 STEWART AVE
GARDEN CITY, NY 11530

Nassau County (516) 536-2800

G S GILL, MD PC

Durable Medical Equipment & Medical Supplies

1101 STEWART AVE, SUITE 101
GARDEN CITY, NY 11530

Nassau County (516) 741-0055

XIULI MENG M D P C

Clinic/Center (Rehabilitation)

1101 STEWART AVE
GARDEN CITY, NY 11530

Nassau County (917) 887-8839

PREFERRED MRI, PC

Radiology (Diagnostic Radiology)

1101 STEWART AVE
GARDEN CITY, NY 11530

Nassau County (516) 794-2835

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 Julian Sonnenfeld's NPI number?

The NPI number for Julian Sonnenfeld is 1700273943. It was assigned to this individual provider in the NPPES registry on April 24, 2015.

Where is Julian Sonnenfeld located?

Julian Sonnenfeld practices at 1101 Stewart Ave, Garden City, NY 11530. The listed phone number is (516) 536-2800.

What is Julian Sonnenfeld's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery, specializing in Sports Medicine, with taxonomy code 207XX0005X.

Is Julian Sonnenfeld enrolled in Medicare?

Yes. Julian Sonnenfeld 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.

Which organizations bill Medicare for Julian Sonnenfeld's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Julian Sonnenfeld reassigns Medicare benefits to 2 organizations: True North Medical Group PC (Merrick, NY) and Carolinas Medical Center (Concord, NC). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Julian Sonnenfeld's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Julian Sonnenfeld affiliated with any hospitals?

According to CMS data, Julian Sonnenfeld is affiliated with North Shore University Hospital and St Charles Hospital.

When was this NPI record last updated?

The NPPES record for Julian Sonnenfeld was last updated on November 2, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 days 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.