Jonathan J. Fillmore, MD
Endocrinology, Diabetes & Metabolism Physician · Trumbull, CT
Jonathan J. Fillmore, MD is an endocrinology, diabetes & metabolism physician with a practice address in Trumbull, Connecticut, and NPI 1578592713, issued on Jul 1, 2006. Check the license (Connecticut 039461, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Jonathan J. Fillmore
- Credential
- MD
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- 039461 CT
Self-reported in NPPES; status is on the state search - Practice location
- 5520 Park Ave, Trumbull, CT 06611
- Phone
- (203) 373-7388
- Enumerated
- Jul 1, 2006
- Record last updated
- Dec 9, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (203) 373-7472
- Medicare enrollment
- Enrolled (PECOS I20040618000091); accepts Medicare assignment
- Medical or professional school
- Js Weill Medical College, Cornell University, 1997
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 214 in Connecticut → Look up another NPI →
Also registered at 5520 Park Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Jonathan J. Fillmore in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 039461Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.5 times the Medicare Part D claims of the average endocrinology, diabetes & metabolism physician in 2024
6,573 Medicare Part D claims for 717 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 50% of claims.
Most prescribed
- Levothyroxine Sodium725 claims
- Ozempic623 claims
- Lantus Solostar292 claims
- Metformin Hcl280 claims
- Glimepiride260 claims
- Jardiance223 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.
Industry payments in 2024: $2,576.57
135 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. The 5,661 providers of this specialty with any payment received $5,742.15 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
- Prospect CT Medical Foundation IncManchester, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jonathan J. Fillmore among 214 endocrinology, diabetes & metabolism physician records in Connecticut
Jonathan J. Fillmore, MD is one of 214 endocrinology, diabetes & metabolism physician records with a practice address in Connecticut. 83% 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 13% of them.
- NPI issued2006 · 13% of these records are older, 55% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated1997 · median 2004 among the 145 with a school on file
- Record last updated2009 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
11 endocrinology, diabetes & metabolism physician records list a practice address in Trumbull
They are 11 of the 786 NPPES records with a practice address in Trumbull, and 214 endocrinology, diabetes & metabolism physician records in Connecticut.
All 214 in Connecticut → Every provider in Trumbull → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Danielle Benaviv-Meskin, MDTrumbull, CT 066111730106519
- Judith Castillo, MDTrumbull, CT 066111205034600
- Sandi-Jo Galati, M.D.Trumbull, CT 066111437326147
- Geny George, M.D.Trumbull, CT 066111073870697
- Agnieszka Grochowalska, M.D.Trumbull, CT 066111144496209
- Maryanne Horta, M.D.Trumbull, CT 066111124209101
- Glenn Rich, M.D.Trumbull, CT 066111922027259
- Joseph Rosa, M.D.Trumbull, CT 066111568421469
Common questions
What is Jonathan J. Fillmore, MD's NPI number?
Jonathan J. Fillmore, MD's National Provider Identifier (NPI) is 1578592713, issued on Jul 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Jonathan J. Fillmore, MD located?
The NPPES record lists a practice address at 5520 Park Ave, Trumbull, CT, 06611. Phone: (203) 373-7388. Providers update this record themselves, so call before visiting.
How can I verify Jonathan J. Fillmore, MD's license?
NPPES lists Connecticut license number 039461, 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 Jonathan J. Fillmore, MD prescribe under Medicare Part D?
In 2024, Jonathan J. Fillmore, MD had 6,573 Medicare Part D claims for 717 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. 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.