Susan M. Collins, M.D.
Internal Medicine Physician · Darien, CT
Susan M. Collins, M.D. is an internal medicine physician with a practice address in Darien, Connecticut, and NPI 1306877626, issued on Jul 5, 2006. Check the license (Connecticut 035578, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Susan M. Collins
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 035578 CT
Self-reported in NPPES; status is on the state search - Practice location
- 1500 Post RD, Darien, CT 06820
- Phone
- (203) 655-8749
- Enumerated
- Jul 5, 2006
- Record last updated
- May 10, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (203) 656-0701
- Medicare enrollment
- Enrolled (PECOS I20051209000137); accepts Medicare assignment
- Medical or professional school
- State University Of New York Downstate Medical Center, 1992
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,623 in Connecticut → Look up another NPI →
Also registered at 1500 Post RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Susan M. Collins in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 035578Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
25% more Medicare Part D claims than the average internal medicine physician in 2024
3,970 Medicare Part D claims for 407 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 27 claims were for opioids.
Most prescribed
- Levothyroxine Sodium195 claims
- Atorvastatin Calcium191 claims
- Amlodipine Besylate184 claims
- Rosuvastatin Calcium155 claims
- Pantoprazole Sodium129 claims
- Escitalopram Oxalate122 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): 79.1 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: $37.88
2 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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
- Stamford Health Medical Group IncDarien, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Susan M. Collins among 2,623 internal medicine physician records in Connecticut
Susan M. Collins, M.D. is one of 2,623 internal medicine physician records with a practice address in Connecticut. 81% 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 11% of them.
- NPI issued2006 · 11% of these records are older, 52% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1992 · median 2004 among the 1,646 with a school on file
- Record last updated2017 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
15 internal medicine physician records list a practice address in Darien
They are 15 of the 380 NPPES records with a practice address in Darien, and 2,623 internal medicine physician records in Connecticut.
All 2,623 in Connecticut → Every provider in Darien → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Gene Balboa, MDDarien, CT 068201841366820
- Margaret BaranDarien, CT 068201285623843
- Amanda Collins- Baine, M.D.Darien, CT 068201154340040
- Mark Dam, M.DDarien, CT 068201720005507
- James Dorr, M.D.Darien, CT 068201427367705
- William Giesen, M.D.Darien, CT 068201124104724
- Karthik GunachelvanDarien, CT 068201740604941
- Carolyn Langelier, M.D.Darien, CT 068201780930933
Common questions
What is Susan M. Collins, M.D.'s NPI number?
Susan M. Collins, M.D.'s National Provider Identifier (NPI) is 1306877626, issued on Jul 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Susan M. Collins, M.D. located?
The NPPES record lists a practice address at 1500 Post RD, Darien, CT, 06820. Phone: (203) 655-8749. Providers update this record themselves, so call before visiting.
How can I verify Susan M. Collins, M.D.'s license?
NPPES lists Connecticut license number 035578, 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 Susan M. Collins, M.D. prescribe under Medicare Part D?
In 2024, Susan M. Collins, M.D. had 3,970 Medicare Part D claims for 407 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Susan M. Collins, M.D.'s MIPS final score?
The 2023 MIPS final score is 79.1 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.