Jonathan Siner, M.D.
NPI 1942252416 · Internal Medicine Physician · New Haven, CT
Enrolled with Medicare as Practitioner - Critical Care (intensivists) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jonathan Siner, M.D. is a Internal Medicine Physician provider in New Haven, CT (NPI 1942252416).
Provider details
- NPI number
- 1942252416
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 041871 (CT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
1,073 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) |
|---|---|---|
| Test to Measure Rate of Airflow94375 | 183 | $14 |
| Test to Examine How Well the Lungs Exchange Gases94729 | 177 | $9 |
| Test to Measure Rate of Airflow94375 | 170 | $14 |
| Test to Examine How Well the Lungs Exchange Gases94729 | 138 | $9 |
| Test to Determine Lung Volumes Using Gas Dilution Or Washout94727 | 117 | $12 |
| Test to Determine Lung Volumes Using Gas Dilution Or Washout94727 | 66 | $12 |
| Test for Exercise-Induced Lung Stress |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 4 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Prednisone | 27 |
| Mycophenolate Mofetil | 24 |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 15 |
| Nintedanib Esylatebrand: Ofev | 15 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-16
- Last updated
- 2022-02-08
- Certified
- 2022-02-08
Frequently asked questions
- What is Jonathan Siner's NPI number?
- Jonathan Siner's National Provider Identifier (NPI) is 1942252416, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jonathan Siner's specialty?
- Jonathan Siner is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Jonathan Siner located?
- Jonathan Siner's practice location on file with NPPES is 789 Howard Ave, New Haven, CT 06519-1304.
- What is Jonathan Siner's phone number?
- The practice phone number listed in the NPPES registry for Jonathan Siner is (203) 785-4198.
- Does Jonathan Siner accept Medicare?
- Jonathan Siner is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jonathan Siner's NPI active?
- Yes — Jonathan Siner's NPI (1942252416) is active in the NPPES registry as of the last update on 2022-02-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.