Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

James Yoo

Individual provider Surgery Physician · NPI 1386739282

James Yoo is registered under Colorectal Surgery (Proctology) in Boston, Massachusetts. Graduated from Icahn School of Medicine at Mount Sinai in 1997, 29 years ago. Practices with Dana-Farber Cancer Institute, Inc, a 668-clinician group, accepts Medicare assignment and offers telehealth. Licensed in California and Massachusetts.

Years since qualifying
29
Trained at
Icahn School of Medicine at Mount Sinai
Licensed in
CA, MA
In the registry since
2006
Specialties on file
2
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Practice location Address checks out

800 Washington St
Boston, MA 02111-1552 Not confirmed with CMS for 12 years — call before visiting
Phone: (617) 636-5000
Show map & directions

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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Colon & Rectal Surgery Physician (primary) Taxonomy 208C00000X · Licence 206080 (MA)
Surgery Physician Taxonomy 208600000X · Licence A96908 (CA)

Record details

NPI number1386739282
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedOctober 4, 2006
Last updated in NPPESJanuary 28, 2014

Medicare enrollment

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

Medicare specialtyCOLORECTAL SURGERY (PROCTOLOGY)
Medical schoolICAHN SCHOOL OF MEDICINE AT MOUNT SINAI
Graduated 1997 (29 years in practice)
Group practice Dana-Farber Cancer Institute, Inc. — 668 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations2 on file with Medicare

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.

Colonoscopy 1–10 times
Removal of skin lesions 1–10 times
Removal of tissue 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 patients138
Services billed 321 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. Those with a page here are linked.

Also affiliated with 1 hospital, which CMS identifies by certification number only.

Colleagues at Dana-Farber Cancer Institute, Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 668 clinicians in the practice; 12 are shown here.

Other providers in Boston