Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Stephen J O'Brien, ORTHOPAEDICSURGEON

Individual provider Specialist · NPI 1720002686

Dr. Stephen J O'Brien, ORTHOPAEDICSURGEON practises Orthopedic Surgery in New York, New York. Graduated from University of Virginia School of Medicine in 1981, 45 years ago. Practices with Ny Society for the Relief of Ruptured and Crippled Maintaining, a 175-clinician group and accepts Medicare assignment. Licensed in New York.

Years since qualifying
45
Trained at
University of Virginia School of Medicine
Licensed in
NY
In the registry since
2006
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Practice location Address checks out

535 E 70th St
New York, NY 10021-4872
Phone: (212) 606-1011
Fax: (212) 472-8024
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Specialist (primary) Taxonomy 174400000X · Licence 168755-1 (NY)

Record details

NPI number1720002686
Entity typeIndividual (Type 1)
GenderMale
Credentials ORTHOPAEDICSURGEON
Sole proprietorYes
NPI enumeratedJuly 26, 2006
Last updated in NPPESMarch 30, 2021
Certification dateMarch 30, 2021

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyORTHOPEDIC SURGERY
Also practisesSPORTS MEDICINE
Medical schoolUNIVERSITY OF VIRGINIA SCHOOL OF MEDICINE
Graduated 1981 (45 years in practice)
Group practice Ny Society For The Relief Of Ruptured And Crippled Maintaining — 175 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Lower limb (leg) arthroscopy (minimally invasive joint repair) 51 times · 99th percentile
Upper limb (arm) arthroscopy (minimally invasive joint repair) 23 times · 67th percentile
Knee replacement 30 times · 64th percentile

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients318
Services billed 28,213 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Ny Society for the Relief of Ruptured and Crippled Maintaining

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 175 clinicians in the practice; 12 are shown here.

Other providers in New York