MICHAEL L KORTHALS (O.D.) – Optometrist, NPI 1407880883
Optometrist
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
503 OPTOMETRY in IA
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Provider Addresses for MICHAEL L KORTHALS (O.D.)
422, South Pierce Avenue, Forest Park Historic District, Mason City, Cerro Gordo County, Iowa, 50401, United States
MASON CITY, IA 504012709
Phone: (641) 424-0780
Fax: (641) 424-2345
Type: Mailing
422 S PIERCE AVE STE 100A
MASON CITY, IA 504012709
Phone: (641) 424-0780
Fax: (641) 424-2345
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 2 Open Payments records for all available years, with a total value of $32.
Total Amount is formed as General ($32) + Research ($0) + Ownership ($0) = $32.
Last reported payment date: 2024-05-22 • Largest payer in this snapshot: Optos, Inc. ($19).
Total Amount
$32
General + Research + Ownership
Payments
2
Total payment records
General Amount
$32
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-05-22
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Optos, Inc. | $19 |
| LKC Technologies, Inc. | $13 |
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: 2004-08-04
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 |
|---|---|---|---|---|
| I20040804001915 | I | Optometry | IA | 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 |
|---|---|---|---|---|
| 92286 | Imaging of front third of eye using a special microscope | 539 | 453 | $0 |
| 92014 | Established patient complete exam of visual system | 507 | 503 | $0 |
| 92250 | Photography of the retina | 488 | 447 | $0 |
| 92285 | Photography of content of eyes | 407 | 383 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 297 | 207 | $0 |
Insurance plans in this area (ZIP 50401)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| OPTOMETRY | IA | 92134 | Diagnostic imaging of retina | 30 | 27 |
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