Jonathan Fillmore, MD
NPI 1578592713 · Endocrinology, Diabetes & Metabolism Physician · Trumbull, CT
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jonathan Fillmore, MD is a Endocrinology, Diabetes & Metabolism Physician provider in Trumbull, CT (NPI 1578592713).
Provider details
- NPI number
- 1578592713
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 039461 (CT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
908 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 463 | $132 |
| Hemoglobin A1c Level83036 | 208 | $9 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 135 | $15 |
| Continuous Monitoring of Blood Sugar Level in Tissue Fluid Using Sensor Under Skin With Interpretation and Report95251 | 54 | $34 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 35 | $180 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 90 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 725 | 158 |
| Semaglutidebrand: Ozempic | 623 | 104 |
| Insulin Glargine,hum.rec.anlogbrand: Lantus Solostar | 292 | 71 |
| Metformin Hcl | 280 | 85 |
| Glimepiride | 260 | 60 |
| Empagliflozinbrand: Jardiance | 223 | 49 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,577 across 135 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-01
- Last updated
- 2009-12-09
Frequently asked questions
- What is Jonathan Fillmore's NPI number?
- Jonathan Fillmore's National Provider Identifier (NPI) is 1578592713, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jonathan Fillmore's specialty?
- Jonathan Fillmore is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Jonathan Fillmore located?
- Jonathan Fillmore's practice location on file with NPPES is 5520 Park Ave, Trumbull, CT 06611-3463.
- What is Jonathan Fillmore's phone number?
- The practice phone number listed in the NPPES registry for Jonathan Fillmore is (203) 373-7388.
- Does Jonathan Fillmore accept Medicare?
- Jonathan Fillmore is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jonathan Fillmore's NPI active?
- Yes — Jonathan Fillmore's NPI (1578592713) is active in the NPPES registry as of the last update on 2009-12-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.