MARK K YOUSSEF (M.D.) – Diagnostic Radiology Physician, NPI 1679910301
Diagnostic Radiology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,805 DIAGNOSTIC RADIOLOGY in OH
Provider Addresses for MARK K YOUSSEF (M.D.)
CLEVELAND CLINIC 9500 EUCLID AVENUE/NA-23
CLEVELAND, OH 441950001
Phone: (216) 444-2200
Type: Mailing
NAUGATUCK VALLEY RADIOLOGICAL ASSOCIATES
385 MAIN ST SOUTH
SOUTHBURY, CT 06488
Phone: (203) 267-5114
Type: Mailing
385 MAIN ST S
SOUTHBURY, CT 064884240
Phone: (203) 267-5114
Type: Location
56 Franklin St
Waterbury, CT 067061281
Phone: (203) 753-2574
Type: Location
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: 2022-10-19
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
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 |
|---|---|---|---|---|
| I20221019001048 | I | Diagnostic Radiology | CT | 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 |
|---|---|---|---|---|
| Q9967 | Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml | 4,309 | 57 | $0 |
| 77067 | Screening mammography | 149 | 149 | $0 |
| 77063 | Screening 3d breast mammography | 147 | 147 | $0 |
| 71045 | X-ray of chest, 1 view | 136 | 121 | $0 |
| 71046 | X-ray of chest, 2 views | 103 | 101 | $0 |
Insurance plans in this area (ZIP 44195)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Diagnostic Radiology | PA | |
| Diagnostic Radiology | CT | |
| Diagnostic Radiology | CT | |
| Diagnostic Radiology | CT | |
| Diagnostic Radiology | CT | |
| Diagnostic Radiology | CT | |
| Diagnostic Radiology | CT | |
| Diagnostic Radiology | CT | |
| Diagnostic Radiology | MD | |
| Diagnostic Radiology | CT |
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