GREG B MARRINAN (MD) – Diagnostic Radiology Physician, NPI 1942295506
Diagnostic Radiology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
805 DIAGNOSTIC RADIOLOGY in CT
Provider Addresses for GREG B MARRINAN (MD)
3 ENTERPRISE DR STE 220
SHELTON, CT 064844694
Phone: (203) 696-6125
Fax: (203) 696-6130
Type: Mailing
1 CORPORATE DR STE 325
SHELTON, CT 064846295
Phone: (203) 696-6125
Fax: (203) 337-9731
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2024-12-03
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 2 Medicare enrollment records; no due dates published yet.
Enrollment records
2
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20100608000646 | I | Diagnostic Radiology | CT | TBD |
| I20241203002338 | I | Diagnostic Radiology | NY | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| A9585 | Injection, gadobutrol, 0.1 ml | 11,147 | 138 | $0 |
| Q9967 | Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml | 2,345 | 26 | $0 |
| 71045 | X-ray of chest, 1 view | 439 | 383 | $0 |
| 71046 | X-ray of chest, 2 views | 176 | 174 | $0 |
| 73721 | Mri scan of leg joint without contrast | 140 | 135 | $0 |
Insurance plans in this area (ZIP 06484)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| DIAGNOSTIC RADIOLOGY | CT | 71010 | X-ray of chest, 1 view, front | 301 | 272 |
| DIAGNOSTIC RADIOLOGY | CT | 71250 | CT scan chest | 44 | 43 |
| DIAGNOSTIC RADIOLOGY | CT | 73630 | X-ray of foot, minimum of 3 views | 25 | 20 |
| DIAGNOSTIC RADIOLOGY | CT | 74177 | CT scan of abdomen and pelvis with contrast | 51 | 51 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Diagnostic Radiology | CT | |
| Diagnostic Radiology | CT | |
| Diagnostic Radiology | CT | |
| Diagnostic Radiology | CT | |
| Diagnostic Radiology | CT | |
| Diagnostic Radiology | CT | |
| Diagnostic Radiology | CT | |
| Diagnostic Radiology | CT | |
| Interventional Radiology, Diagnostic Radiology, Diagnostic Radiology, Interventional Radiology | NY | |
| Diagnostic Radiology | CT |
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