John Frese, M.D.
Gastroenterology Physician · New London, CT
John Frese, M.D. is a gastroenterology physician with a practice address in New London, Connecticut, and NPI 1457316382, issued on Apr 20, 2006. Check the license (Connecticut 031797, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- John Frese
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 031797 CT
Self-reported in NPPES; status is on the state search - Practice location
- 234A Bank St, New London, CT 06320
- Phone
- (860) 442-0290
- Enumerated
- Apr 20, 2006
- Record last updated
- Dec 19, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (860) 442-2136
- Medicaid ID
- 1317975 CT
- Medicare enrollment
- Enrolled (PECOS I20041228000662); accepts Medicare assignment
- Medical or professional school
- University Of Connecticut School Of Medicine, 1989
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 336 in Connecticut → Look up another NPI →
Also registered at 234A Bank St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Teresa D'Errico, APRNNurse Practitioner1356384556
- Emily JohnsonFamily Nurse Practitioner1053175935
- John Madsen, M.D.Gastroenterology Physician1144286667
- Eugene Sapozhnikov, M.D.Gastroenterology Physician1164488094
Verify John Frese in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 031797Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
10% more Medicare Part D claims than the average gastroenterology physician in 2024
892 Medicare Part D claims for 364 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims.
Most prescribed
- Omeprazole227 claims
- Pantoprazole Sodium167 claims
- Sod Sulf-Potass Sulf-Mag Sulf162 claims
- Mesalamine46 claims
- Famotidine37 claims
- Esomeprazole Magnesium21 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 85.1 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $2,946.85
132 payments; by number, the most common kind was food and beverage; the largest payer was Phathom Pharmaceuticals, Inc. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Connecticut GI PLLCHartford, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Frese among 336 gastroenterology physician records in Connecticut
John Frese, M.D. is one of 336 gastroenterology physician records with a practice address in Connecticut. 86% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 15% of them.
- NPI issued2006 · 15% of these records are older, 49% newer
- In a Medicare fileYes · 86% of these records are
- In the CMS Doctors and Clinicians fileYes · 76% of these records are
- Graduated1989 · median 2001 among the 255 with a school on file
- Record last updated2012 · 69% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Connecticut
There are 336 gastroenterology physician records in Connecticut.
All 336 in Connecticut → Every provider in New London → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Mical Campbell, MDNew London, CT 063201083628770
- Amzad Khan, M.D.New London, CT 063201790945996
- John Madsen, M.D.New London, CT 063201144286667
- Eugene Sapozhnikov, M.D.New London, CT 063201164488094
- Abera Abay, M.D.Norwich, CT 063601861489585
- Tonya Hall, M.D.Norwich, CT 063601104813724
- Jefrey Salek, MDNorwich, CT 063601962656314
- You Sung Sang, M.D.Norwich, CT 063601275520892
Common questions
What is John Frese, M.D.'s NPI number?
John Frese, M.D.'s National Provider Identifier (NPI) is 1457316382, issued on Apr 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Frese, M.D. located?
The NPPES record lists a practice address at 234A Bank St, New London, CT, 06320. Phone: (860) 442-0290. Providers update this record themselves, so call before visiting.
How can I verify John Frese, M.D.'s license?
NPPES lists Connecticut license number 031797, as entered by the provider. Search the Connecticut Medical Examining Board at https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John Frese, M.D. prescribe under Medicare Part D?
In 2024, John Frese, M.D. had 892 Medicare Part D claims for 364 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is John Frese, M.D.'s MIPS final score?
The 2023 MIPS final score is 85.1 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.