Ellen Walker Seyller, MD
Family Medicine Physician · Cromwell, CT
Ellen Walker Seyller, MD is a family medicine physician with a practice address in Cromwell, Connecticut, and NPI 1558940445, issued on Apr 7, 2021. Check the license (Connecticut 082545, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Ellen Walker Seyller
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 082545 CT
Self-reported in NPPES; status is on the state search - Practice location
- 70 Shunpike RD, Cromwell, CT 06416
- Phone
- (860) 358-5280
- Enumerated
- Apr 7, 2021
- Record last updated
- Nov 5, 2025
- Fax
- (860) 358-8650
- Medicare enrollment
- Enrolled (PECOS I20250909002782); accepts Medicare assignment
- Medical or professional school
- University Of Vermont College Of Medicine, 2021
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 958 in Connecticut → Look up another NPI →
Also registered at 70 Shunpike RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Daniela Calle, APRNFamily Nurse Practitioner1356905590
- Rebekah ComerPrimary Care Nurse Practitioner1730907148
- Tyler Ditunno, APRNFamily Nurse Practitioner1497521629
- Kristen Donato, DOFamily Medicine Physician1174888390
- Sarah Fortin, M.D.Family Medicine Physician1043745714
- Malisa Lahtinen, M.DFamily Medicine Physician1346371465
Verify Ellen Walker Seyller in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 082545Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
61% fewer Medicare Part D claims than the average family medicine physician in 2024
1,370 Medicare Part D claims for 173 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium114 claims
- Lisinopril67 claims
- Amlodipine Besylate57 claims
- Pantoprazole Sodium46 claims
- Eliquis40 claims
- Gabapentin39 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.
Bills Medicare through one group practice
- Mhs Primary Care, Inc.Cromwell, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ellen Walker Seyller among 958 family medicine physician records in Connecticut
Ellen Walker Seyller, MD is one of 958 family medicine physician records with a practice address in Connecticut. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 90% of them.
- NPI issued2021 · 90% of these records are older, 7% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2021 · median 2009 among the 611 with a school on file
- Record last updated2025 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
9 family medicine physician records list a practice address in Cromwell
They are 9 of the 631 NPPES records with a practice address in Cromwell, and 958 family medicine physician records in Connecticut.
All 958 in Connecticut → Every provider in Cromwell → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Kristen Donato, DOCromwell, CT 064161174888390
- Sarah Fortin, M.D.Cromwell, CT 064161043745714
- Marta Kroo, MDCromwell, CT 064161508800806
- Malisa Lahtinen, M.DCromwell, CT 064161346371465
- Stephen Siegel, MDCromwell, CT 064161376570168
- Alison Stedman, MDCromwell, CT 064161295314292
- Nikolaos Vassiliou, MDCromwell, CT 064161851554349
- Linda Weiss, DOCromwell, CT 064161245216787
Common questions
What is Ellen Walker Seyller, MD's NPI number?
Ellen Walker Seyller, MD's National Provider Identifier (NPI) is 1558940445, issued on Apr 7, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Ellen Walker Seyller, MD located?
The NPPES record lists a practice address at 70 Shunpike RD, Cromwell, CT, 06416. Phone: (860) 358-5280. Providers update this record themselves, so call before visiting.
How can I verify Ellen Walker Seyller, MD's license?
NPPES lists Connecticut license number 082545, 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 Ellen Walker Seyller, MD prescribe under Medicare Part D?
In 2024, Ellen Walker Seyller, MD had 1,370 Medicare Part D claims for 173 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.