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

Erynn B Yang, MD

Individual provider Ophthalmology Physician · NPI 1114135746

Erynn B Yang, MD practises Ophthalmology in Boston, Massachusetts. Graduated from Columbia University College of Physicians and Surgeons in 2005, 21 years ago. Practices with Atrius Health Inc, a 1,205-clinician group and accepts Medicare assignment. Licensed in Iowa.

Years since qualifying
21
Trained at
Columbia University College of Physicians and Surgeons
Licensed in
IA
In the registry since
2007
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

133 Brookline Ave
Boston, MA 02215-3904
Phone: (617) 421-1151
Fax: (617) 421-8787
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

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

Specialties & licences

Ophthalmology Physician (primary) Taxonomy 207W00000X · Licence R-7767 (IA)

Record details

NPI number1114135746
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 18, 2007
Last updated in NPPESMarch 4, 2021
Certification dateMarch 4, 2021

Medicare enrollment

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

Medicare specialtyOPHTHALMOLOGY
Medical schoolCOLUMBIA UNIVERSITY COLLEGE OF PHYSICIANS AND SURGEONS
Graduated 2005 (21 years in practice)
Group practice Atrius Health Inc — 1205 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations6 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.

Cataract surgery 191 times · 83rd 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 patients658
Services billed 2,516 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

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 Atrius Health Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1205 clinicians in the practice; 12 are shown here.

Other providers in Boston