Jonathan Chang
Colon & Rectal Surgery β’ Bloomfield, CT
6 Northwestern Dr Ste 305
Bloomfield, CT 060023428
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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Jonathan Chang is listed in NPPES under Colon & Rectal Surgery.
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NPI assigned on March 30, 2017; this date does not establish years in practice.
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Published CMS data list 12 Medicare Part D prescriptions, including refills, in 2022.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2022. Published rows only; this is not a quality measure.
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Published Part D records, 2022:
- Oxycodone Hcl β 12 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2022. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table Β· Guide: How to read Medicare Part D prescriber data
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Medicare Part D prescriptions went from 23 in 2018 to 12 in 2022.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2018β2022.
Practice Location & Contact Primary Location
6 Northwestern Dr Ste 305
Bloomfield, CT 060023428
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 1 additional practice-address record in South Windsor, CT. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
CMS Doctors and Clinicians lists 1 group name: Colon And Rectal Surgeons Of Greater Hartford Llc. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
Tufts University School Of Medicine
2017
What Public CMS Data Show
Colon & Rectal Surgery: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
12 standardized 30-day fills in 2022
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$42 in 2022
The total cost of these prescriptions in 2022, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2022.
Open Payments general payments, program year 2025
All general payments: $1,130.13 across 4 records.
By nature of payment
- Education: $1,000.00 across 1 record.
- Food and Beverage: $130.13 across 3 records.
Reporting-company totals
- INTUITIVE SURGICAL, INC.: $1,028.98 across 2 records.
- Boston Scientific Corporation: $101.15 across 2 records.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
Years since graduation
9 years (graduated 2017)
CMS Doctors and Clinicians data list 2017 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2017
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, βDoes your provider accept Medicare as full payment?β
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Jonathan Chang has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Jonathan Chang as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Bloomfield and Connecticut
Billing and prescribing volume is not a quality rating.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Jonathan Chang are from 2022.
11 active clinicians are listed under Colon & Rectal Surgery with a practice address in Bloomfield, CT (54 in Connecticut).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Bloomfield
9.1% of these 11 clinicians have the CMS telehealth indicator.
63.6% of these 11 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 48% from 23 in 2018 to 12 in 2022.
- 2018: 23
- 2019: 11
- 2022: 12
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30-day fills
30-day fills decreased 48% from 23 in 2018 to 12 in 2022.
- 2018: 23
- 2019: 11
- 2022: 12
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Part D drug cost
Part D drug cost went from $108 in 2018 to $42 in 2022.
- 2018: $108
- 2019: $39
- 2022: $42
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Industry payments (Open Payments)
CMS data for industry payments (Open Payments) are available for 2025 only.
Sources: CMS Medicare Part D Prescribers (2022), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo Β· Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 β December 31, 2025): fewer than 11 records totaling $1,130.13.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| INTUITIVE SURGICAL, INC. |
Education
In-kind items and services
|
DAVINCI XI | General | $1,000.00 |
| Boston Scientific Corporation |
Food and Beverage
In-kind items and services
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General - Hemostasis | General | $78.05 |
| INTUITIVE SURGICAL, INC. |
Food and Beverage
In-kind items and services
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Da Vinci Surgical System | General | $28.98 |
| Boston Scientific Corporation |
Food and Beverage
In-kind items and services
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General - Hemostasis | General | $23.10 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2022.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Oxycodone Hcl | Oxycodone Hcl | 12 | 31 | $42.40 | 12 |
Source: CMS Part D by Provider and Drug, 2022; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2025-08-05NUCC Taxonomy Code: 208C00000X
A colon and rectal surgeon is trained to diagnose and treat various diseases of the intestinal tract, colon, rectum, anal canal and perianal area by medical and surgical means. This specialist also deals with other organs and tissues (such as the liver, urinary and female reproductive system) involved with primary intestinal disease.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - COLORECTAL SURGERY (PROCTOLOGY)
I20250724003895
CT
0345511739
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
Colon And Rectal Surgeons Of Greater Hartford Llc
6 Northwestern Dr, Bloomfield, CT 060023428
Phone: 8602428591
Secondary Practice Locations
2400 Tamarack Ave Ste 200
South Windsor, CT 060745559
Phone: 8602428591
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Colon & Rectal Surgery
Doctor of Medicine (M.D.)
Colon & Rectal Surgery
Doctor of Medicine (M.D.)
Colon & Rectal Surgery
Doctor of Medicine (M.D.)
Physician Assistant - Surgical
Physician Assistant (Certified)
Colon & Rectal Surgery
Doctor of Medicine (M.D.)
Colon & Rectal Surgery
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 6 NORTHWESTERN DR STE 305, BLOOMFIELD, CT 060023428 (Tel: 8602428591)
Colon & Rectal Surgery (license number reported to NPPES: CT 80291)
NPI status registered as active in NPPES database
Registered at 263 FARMINGTON AVE, MC8073, FARMINGTON, CT 060303955 (Tel: 8606793467)
Registered at 263 FARMINGTON AVE, FARMINGTON, CT 060301921
Recorded as JONATHAN CHANG
Student in an Organized Health Care Education/Training Program
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Colon & Rectal Surgery Specialists in Bloomfield
- Dr. Andrew Raissis, MD
- Dr. Robert Lewis, MD
- Dr. Rachel Scott, DO
- Dr. Saumitra Banerjee, MD
- Dr. Daniel Mullins, MD
- Dr. Vanessa Baratta, MD
Mailing Address
263 Farmington Ave
Farmington, CT 060301921