Jonathan Zimmerman, MD
NPI 1609856897 · Internal Medicine Physician · Greenwich, CT
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jonathan Zimmerman, MD is a Internal Medicine Physician provider in Greenwich, CT (NPI 1609856897).
Provider details
- NPI number
- 1609856897
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 79246 (CT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
271 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 | 110 | $107 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 52 | $79 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 34 | $82 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 25 | $17 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 24 | $174 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 85 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 338 | 104 |
| Amlodipine Besylate | 314 | 96 |
| Metformin Hcl | 150 | 36 |
| Lisinopril | 148 | 44 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 117 | 22 |
| Omeprazole | 104 | 28 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-01-23
- Last updated
- 2025-05-07
- Certified
- 2025-05-07
Frequently asked questions
- What is Jonathan Zimmerman's NPI number?
- Jonathan Zimmerman's National Provider Identifier (NPI) is 1609856897, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jonathan Zimmerman's specialty?
- Jonathan Zimmerman is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Jonathan Zimmerman located?
- Jonathan Zimmerman's practice location on file with NPPES is 5 Perryridge Rd Dept of, Greenwich, CT 06830-4697.
- What is Jonathan Zimmerman's phone number?
- The practice phone number listed in the NPPES registry for Jonathan Zimmerman is (734) 678-8367.
- Does Jonathan Zimmerman accept Medicare?
- Jonathan Zimmerman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jonathan Zimmerman's NPI active?
- Yes — Jonathan Zimmerman's NPI (1609856897) is active in the NPPES registry as of the last update on 2025-05-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.