CHARLES SOONKYU AHN (MD) – Ophthalmology Physician, NPI 1942260278
Ophthalmology Physician
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Doctor Profile
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Profile Insights
NPPES metrics only — not quality of care.
958 OPHTHALMOLOGY in IL
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Provider Addresses for CHARLES SOONKYU AHN (MD)
1860 PAYSPHERE CIR
CHICAGO, IL 606740018
Phone: (630) 469-9200
Type: Mailing
PO BOX 713260
CHICAGO, IL 606771260
Phone: (630) 469-9200
Type: Mailing
1327, Butterfield Road, Downers Grove, DuPage County, Illinois, 60515, United States
STE 618
DOWNERS GROVE, IL 605151078
Phone: (630) 322-8300
Type: Location
808 RICKERT DR STE 201
NAPERVILLE, IL 605400910
Phone: (630) 355-8000
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 5 Open Payments records for all available years, with a total value of $109.
Total Amount is formed as General ($109) + Research ($0) + Ownership ($0) = $109.
Last reported payment date: 2024-10-25 • Largest payer in this snapshot: Johnson & Johnson Surgical Vision, Inc. ($87).
Total Amount
$109
General + Research + Ownership
Payments
5
Total payment records
General Amount
$109
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-10-25
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Johnson & Johnson Surgical Vision, Inc. | $87 |
| Alcon Vision LLC | $22 |
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: 2006-06-19
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 |
|---|---|---|---|---|
| I20060619000144 | I | Ophthalmology | IL | 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 |
|---|---|---|---|---|
| 92014 | Established patient complete exam of visual system | 525 | 504 | $0 |
| 66984 | Removal of cataract with insertion of prosthetic lens | 372 | 233 | $0 |
| 92136 | Measurement of corneal curvature and depth of eye | 338 | 250 | $0 |
| 92012 | Established patient problem focused exam of visual system | 199 | 111 | $0 |
| 92004 | New patient complete exam of visual system | 151 | 151 | $0 |
Insurance plans in this area (ZIP 60674)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| OPHTHALMOLOGY | IL | 92083 | Measurement of field of vision during daylight conditions | 14 | 13 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| E N D O C R I N O L O G Y | IL | |
| Physician Assistant | IL | |
| Internal Medicine | IL | |
| Nurse Practitioner | IL | |
| - | IL | |
| - | IL | |
| - | IL | |
| - | IL | |
| - | IL | |
| Physical Therapist In Private Practice | IL |
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