Kristin Loening Macarthur, M.D.
Gastroenterology Physician · Branford, CT
Kristin Loening Macarthur, M.D. is a gastroenterology physician with a practice address in Branford, Connecticut, and NPI 1225357809, issued on May 22, 2010. Check the license (Connecticut 055229, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Kristin Loening Macarthur
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 055229 CT
Self-reported in NPPES; status is on the state search - Practice location
- 1224 Main St, Branford, CT 06405
- Phone
- (203) 481-0315
- Enumerated
- May 22, 2010
- Record last updated
- Dec 4, 2023
- Fax
- (203) 481-6788
- Medicare enrollment
- Enrolled (PECOS I20160907000351); accepts Medicare assignment
- Medical or professional school
- University Of Connecticut School Of Medicine, 2010
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 336 in Connecticut → Look up another NPI →
Also registered at 1224 Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Melissa Booth, P.T.Physical Therapist1285875567
- Michael Dorfman, M.D.Gastroenterology Physician1164658555
- Vicki Fisher, PTPhysical Therapist1114169000
- Keri Herzog, M.D.Gastroenterology Physician1427292614
- Christopher Illick, MDGastroenterology Physician1609836998
- Vincent Sotero, D.M.D.General Practice Dentistry1336212885
Verify Kristin Loening Macarthur in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 055229Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
42% more Medicare Part D claims than the average gastroenterology physician in 2024
1,155 Medicare Part D claims for 402 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. 14 claims were for opioids.
Most prescribed
- Pantoprazole Sodium272 claims
- Omeprazole119 claims
- Sod Sulf-Potass Sulf-Mag Sulf102 claims
- Linzess84 claims
- Famotidine59 claims
- Creon47 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): 73.6 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: $1,215.35
62 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie 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 2 group practices
- Digestive Disease Associates LLCBranford, CT
- Rehabilitation Associates IncFairfield, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Kristin Loening Macarthur among 336 gastroenterology physician records in Connecticut
Kristin Loening Macarthur, 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 2010, is newer than 71% of them.
- NPI issued2010 · 71% of these records are older, 26% newer
- In a Medicare fileYes · 86% of these records are
- In the CMS Doctors and Clinicians fileYes · 76% of these records are
- Graduated2010 · median 2001 among the 255 with a school on file
- Record last updated2023 · 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 Branford → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Kenneth Barshop, M.D.Branford, CT 064051316396690
- Michael Dorfman, M.D.Branford, CT 064051164658555
- Keri Herzog, M.D.Branford, CT 064051427292614
- Christopher Illick, MDBranford, CT 064051609836998
- Joseph Yu, MDBranford, CT 064051346209046
- Jeffrey Dreznick, M.D.Ansonia, CT 064011902895436
- Deborah Levenson, M.D.Ansonia, CT 064011952406688
- Michael Lipcan, MDAnsonia, CT 064011770624447
Common questions
What is Kristin Loening Macarthur, M.D.'s NPI number?
Kristin Loening Macarthur, M.D.'s National Provider Identifier (NPI) is 1225357809, issued on May 22, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Kristin Loening Macarthur, M.D. located?
The NPPES record lists a practice address at 1224 Main St, Branford, CT, 06405. Phone: (203) 481-0315. Providers update this record themselves, so call before visiting.
How can I verify Kristin Loening Macarthur, M.D.'s license?
NPPES lists Connecticut license number 055229, 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 Kristin Loening Macarthur, M.D. prescribe under Medicare Part D?
In 2024, Kristin Loening Macarthur, M.D. had 1,155 Medicare Part D claims for 402 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is Kristin Loening Macarthur, M.D.'s MIPS final score?
The 2023 MIPS final score is 73.6 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.