MARK ZEKAJ (MD) – Orthopaedic Surgery Physician, NPI 1457745416
Orthopaedic Surgery Physician
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Doctor Profile
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Profile Insights
NPPES metrics only — not quality of care.
1,265 ORTHOPEDIC SURGERY in IL
Provider Addresses for MARK ZEKAJ (MD)
5841 S MARYLAND AVE
CHICAGO, IL 606371443
Phone: (773) 834-3531
Type: Mailing
5841 S Maryland Ave
Chicago, IL 606371443
Phone: (773) 834-3531
Type: Location
333 N SUMMIT ST FL 7
TOLEDO, OH 436041531
Phone: (734) 240-8480
Fax: (734) 384-0469
Type: Mailing
1420 N MONROE ST
MONROE, MI 481624211
Phone: (734) 240-8480
Fax: (734) 384-0469
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 12 Open Payments records for all available years, with a total value of $1,558.
Total Amount is formed as General ($1,558) + Research ($0) + Ownership ($0) = $1,558.
Last reported payment date: 2024-12-11 • Largest payer in this snapshot: Zimmer Biomet Holdings, Inc. ($1,360).
Total Amount
$1,558
General + Research + Ownership
Payments
12
Total payment records
General Amount
$1,558
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-11
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Zimmer Biomet Holdings, Inc. | $1,360 |
| Stryker Corporation | $175 |
| Solventum Corporation | $24 |
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: 2021-08-06
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 |
|---|---|---|---|---|
| I20210806000368 | I | Orthopedic Surgery | MI | 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 |
|---|---|---|---|---|
| J3301 | Injection, triamcinolone acetonide, not otherwise specified, 10 mg | 1,232 | 108 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 271 | 176 | $0 |
| 20610 | Aspiration and/or injection of fluid from large joint | 203 | 117 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 166 | 110 | $0 |
| 73564 | X-ray of knee, 4 or more views | 145 | 116 | $0 |
Insurance plans in this area (ZIP 60637)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| General Surgery | MI | |
| Family Practice | MI | |
| Family Practice | OH | |
| Clinical Psychologist | MI | |
| Nurse Practitioner | MI | |
| Physician Assistant | MI | |
| Family Practice | OR | |
| Physician Assistant | OH | |
| Clinical Social Worker | MI | |
| Clinical Social Worker | MI |
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