DR. MOSTAFA MOHAMED EZZAT HAMZA A MAZEN (MD) – Ophthalmology Physician, NPI 1497284731
Ophthalmology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
444 OPHTHALMOLOGY in MO
Provider Addresses for DR. MOSTAFA MOHAMED EZZAT HAMZA A MAZEN (MD)
3513 Harry S Truman Blvd
Saint Charles, MO 633014077
Phone: (636) 688-7500
Type: Location
12692 Lamplighter Square Shpg Ctr
Saint Louis, MO 631282746
Phone: (314) 432-5478
Type: Location
12990 Manchester Rd Ste 201
Des Peres, MO 631311860
Phone: (314) 909-0633
Type: Location
400 E 3RD ST
DULUTH, MN 558051951
Phone: (218) 786-8364
Type: Location
43 WHITING HILL RD STE 300
BREWER, ME 044121006
Phone: (207) 973-7000
Fax: (207) 973-5042
Type: Mailing
1176, Main Street, Buffalo Niagara Medical Campus, Buffalo, Erie County, New York, 14209, United States
BUFFALO, NY 142092102
Phone: (716) 881-7900
Fax: (716) 677-6500
Type: Location
SSB-5
400 EAST THIRD STREET
DULUTH, MN 558051951
Phone: (218) 786-8364
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 25 Open Payments records for all available years, with a total value of $2,373.
Total Amount is formed as General ($2,373) + Research ($0) + Ownership ($0) = $2,373.
Last reported payment date: 2024-12-16 • Largest payer in this snapshot: ABBVIE INC. ($1,128).
Total Amount
$2,373
General + Research + Ownership
Payments
25
Total payment records
General Amount
$2,373
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-16
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| ABBVIE INC. | $1,128 |
| Alcon Vision LLC | $479 |
| Glaukos Corporation | $322 |
| Sight Sciences, Inc. | $141 |
| Carl Zeiss Meditec USA, Inc. | $115 |
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: 2025-08-12
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 |
|---|---|---|---|---|
| I20231109002219 | I | Ophthalmology | MO | TBD |
| I20250812003238 | I | Ophthalmology | MA | 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 |
|---|---|---|---|---|
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 113 | 86 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 30 | 25 | $0 |
| 99203 | New patient office or other outpatient visit, 30-44 minutes | 29 | 29 | $0 |
| 92083 | Exam of visual field with extended testing | 28 | 28 | $0 |
| 66984 | Removal of cataract with insertion of prosthetic lens | 25 | 16 | $0 |
Insurance plans in this area (ZIP 63301)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| - | MA | |
| - | MA | |
| - | MA | |
| - | MA | |
| - | MA | |
| - | MA | |
| - | MA | |
| - | MA | |
| - | MA | |
| Emergency Medicine | NC |
Reviews
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