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

Individual provider Orthopaedic Surgery Physician · NPI 1770964280

Bonnie Y Chien, MD practises Orthopedic Surgery in New York, New York. Graduated from Stanford University School of Medicine in 2015, 11 years ago. Practices with Trustees of Columbia University in the City of New York, a 2,250-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Massachusetts and New York.

Years since qualifying
11
Trained at
Stanford University School of Medicine
Licensed in
MA, NY
In the registry since
2015
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

622 W 168th St Ph 111130
New York, NY 10032-3720
Phone: (212) 305-4587
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Orthopaedic Surgery Physician (primary) Taxonomy 207X00000X · Licence 308333 (NY)
Orthopaedic Surgery Physician Taxonomy 207X00000X · Licence L-263063 (MA)

Record details

NPI number1770964280
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 11, 2015
Last updated in NPPESMarch 14, 2023
Certification dateMarch 14, 2023

Medicare enrollment

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

Medicare specialtyORTHOPEDIC SURGERY
Medical schoolSTANFORD UNIVERSITY SCHOOL OF MEDICINE
Graduated 2015 (11 years in practice)
Group practice Trustees Of Columbia University In The City Of New York — 2250 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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) 1–10 times

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 patients229
Services billed 845 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

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 Trustees of Columbia University in the City of New York

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2250 clinicians in the practice; 12 are shown here.

Other providers in New York