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

Jonathan Chang

Individual provider Colon & Rectal Surgery Physician · NPI 1861924755

Jonathan Chang is registered under Colorectal Surgery (Proctology) in Bloomfield, Connecticut. Graduated from Tufts University School of Medicine in 2017, 9 years ago. Practices with Colon and Rectal Surgeons of Greater Hartford LLC, a 9-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Connecticut.

Years since qualifying
9
Trained at
Tufts University School of Medicine
Licensed in
CT
In the registry since
2017
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Practice location Address checks out

6 Northwestern Dr Ste 305
Bloomfield, CT 06002-3428
Phone: (860) 242-8591
Fax: (860) 242-2511
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 2400 Tamarack Ave Ste 200, South Windsor, CT 06074-5559 — (860) 242-8591

Specialties & licences

Colon & Rectal Surgery Physician (primary) Taxonomy 208C00000X · Licence 80291 (CT)

Record details

NPI number1861924755
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedMarch 30, 2017
Last updated in NPPESAugust 5, 2025
Certification dateAugust 5, 2025

Medicare enrollment

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

Medicare specialtyCOLORECTAL SURGERY (PROCTOLOGY)
Medical schoolTUFTS UNIVERSITY SCHOOL OF MEDICINE
Graduated 2017 (9 years in practice)
Group practice Colon And Rectal Surgeons Of Greater Hartford Llc — 9 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.

Colonoscopy 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.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Education $1,000 1 payment · educational material or training, not a fee
Food and Beverage $130 3 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Colon and Rectal Surgeons of Greater Hartford LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 9 clinicians in the practice; 3 are shown here.

Other providers in Bloomfield