Zenon Protopapas, MD
NPI 1083606321 · Diagnostic Radiology Physician · New Haven, CT
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Zenon Protopapas, MD is a Diagnostic Radiology Physician provider in New Haven, CT (NPI 1083606321).
Provider details
- NPI number
- 1083606321
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- License
- 030336 (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
40 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) |
|---|---|---|
| Mri Scan of Heart Before and After Contrast75561 | 40 | $383 |
Typical Medicare-allowed amounts for these services range $383–$383 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-08-22
- Last updated
- 2007-07-08
Frequently asked questions
- What is Zenon Protopapas's NPI number?
- Zenon Protopapas's National Provider Identifier (NPI) is 1083606321, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Zenon Protopapas's specialty?
- Zenon Protopapas is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Zenon Protopapas located?
- Zenon Protopapas's practice location on file with NPPES is 1450 Chapel St, New Haven, CT 06511-4405.
- What is Zenon Protopapas's phone number?
- The practice phone number listed in the NPPES registry for Zenon Protopapas is (203) 789-3124.
- Does Zenon Protopapas accept Medicare?
- Zenon Protopapas is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Zenon Protopapas's NPI active?
- Yes — Zenon Protopapas's NPI (1083606321) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.