Benjamin Nicholas Anton Larsen, DO
Internal Medicine Physician · Derby, CT
Benjamin Nicholas Anton Larsen, DO is an internal medicine physician with a practice address in Derby, Connecticut, and NPI 1780333690, issued on Mar 20, 2022. Check the license (Connecticut 84796, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Benjamin Nicholas Anton Larsen
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 84796 CT
Self-reported in NPPES; status is on the state search - Practice location
- 130 Division St, Derby, CT 06418
- Phone
- (203) 732-1330
- Enumerated
- Mar 20, 2022
- Record last updated
- Jun 11, 2026
- Fax
- (203) 732-1332
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,623 in Connecticut → Look up another NPI →
Also registered at 130 Division St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Benjamin Nicholas Anton Larsen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 84796Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average internal medicine physician in 2024
70 Medicare Part D claims for 24 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
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.
Benjamin Nicholas Anton Larsen among 2,623 internal medicine physician records in Connecticut
Benjamin Nicholas Anton Larsen, DO 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 2022, is newer than 95% of them.
- NPI issued2022 · 95% of these records are older, 2% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2026 · 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).
47 internal medicine physician records list a practice address in Derby
They are 47 of the 453 NPPES records with a practice address in Derby, and 2,623 internal medicine physician records in Connecticut.
All 2,623 in Connecticut → Every provider in Derby → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Kanwardeep Arora, MDDerby, CT 064181508026428
- Earl Baker, MDDerby, CT 064181265635148
- Frederick Browne, MDDerby, CT 064181588641955
- Seema Dsouza, M.D.Derby, CT 064181851373187
- Robert Hyde, MDDerby, CT 064181902011885
- David Katz, MDDerby, CT 064181528138435
- Michael KesslerDerby, CT 064181770672180
- Gail Labadia, M.D.Derby, CT 064181649202144
Common questions
What is Benjamin Nicholas Anton Larsen, DO's NPI number?
Benjamin Nicholas Anton Larsen, DO's National Provider Identifier (NPI) is 1780333690, issued on Mar 20, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Benjamin Nicholas Anton Larsen, DO located?
The NPPES record lists a practice address at 130 Division St, Derby, CT, 06418. Phone: (203) 732-1330. Providers update this record themselves, so call before visiting.
How can I verify Benjamin Nicholas Anton Larsen, DO's license?
NPPES lists Connecticut license number 84796, 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 Benjamin Nicholas Anton Larsen, DO prescribe under Medicare Part D?
In 2024, Benjamin Nicholas Anton Larsen, DO had 70 Medicare Part D claims for 24 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
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.