Doctor profile · Federal record
Dr. Charles Ahn, MD
Ophthalmology Physician (CMS: Ophthalmology) · Naperville, IL
- NPI 1942260278
- Accepts Medicare
- 33 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
808 Rickert Dr Ste 201
Naperville, IL 605400910
(630) 355-8000 - Mailing address
-
Po Box 713260
Chicago, IL 606771260
Credentials & registration
- NPI registered
- March 2006 — 20 yrs on file
- Profile last updated
- August 3, 2023
- Year of graduation
- 1993 — 33 yrs since
- Specialty taxonomy
- 207W00000X — NUCC code
- State license (1)
- Illinois #36098124
- Medicaid
- IL #036098124
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1942260278. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,786
Distinct HCPCS
10
Medicare allowed
$386,631
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
92014 |
Established patient complete exam of visual system | 525 | 504 | $130 | |
66984 |
Removal of cataract with insertion of prosthetic lens | 372 | 233 | $552 | |
92136 |
Measurement of corneal curvature and depth of eye | 338 | 250 | $42 | |
92012 |
Established patient problem focused exam of visual system | 199 | 111 | $93 | |
92004 |
New patient complete exam of visual system | 151 | 151 | $154 | |
66821 |
Removal of recurring cataract in lens capsule using a laser | 99 | 80 | $345 | |
92134 |
Imaging of retina | 30 | 26 | $41 | |
92286 |
Imaging of front third of eye using a special microscope | 22 | 22 | $41 | |
92025 |
Ct scan of cornea | 21 | 21 | $37 | |
66761 |
Creation of eye fluid drainage tracts in iris using a laser, per session | 17 | 13 | $311 |
In context: peer comparison
Among 7 peers in this city , average services per provider: 268. This provider delivers 6.7× the peer median.Open Payments
Industry payments received
All-time total
$42
Transactions
2
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Johnson & Johnson Surgical Vision, Inc. | 2 | $42.37 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
2,124
Patients
1,189
Total drug cost
$110,144
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Prednisolone Acetate | Generic | 965 | 538 | $40,155 |
| Ofloxacin | Generic | 642 | 440 | $10,319 |
| Latanoprost | Generic | 142 | 40 | $2,070 |
| Ketorolac Tromethamine | Generic | 78 | 45 | $3,318 |
| Ciprofloxacin Hcl | Generic | 67 | 48 | $1,016 |
| Brimonidine Tartrate | Generic | 40 | 11 | $2,950 |
| Loteprednol Etabonate | Generic | 32 | 11 | $7,003 |
| Timolol Maleate | Generic | 31 | 12 | $315 |
| Polymyxin B Sul-Trimethoprim (Polymyxin B Sulf/Trimethoprim) | Brand | 24 | 16 | $211 |
| Moxifloxacin (Moxifloxacin Hcl) | Brand | 21 | 14 | $691 |
Frequently asked questions
What is Dr. Charles Ahn's medical specialty?
Dr. Charles Ahn practices Ophthalmology Physician in Naperville, IL.
Where does Dr. Charles Ahn practice?
Dr. Charles Ahn practices at 808 Rickert Dr Ste 201, Naperville, IL 605400910. Office phone: 6303558000.
What is Dr. Charles Ahn's NPI?
Dr. Charles Ahn's National Provider Identifier (NPI) is 1942260278, issued by NPPES.
Does Dr. Charles Ahn accept Medicare assignment?
Yes. Dr. Charles Ahn accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Charles Ahn commonly perform?
Top Medicare-reported procedures in 2023: Established patient complete exam of visual system (HCPCS 92014); Removal of cataract with insertion of prosthetic lens (HCPCS 66984); Measurement of corneal curvature and depth of eye (HCPCS 92136). Source: CMS Medicare Physician & Other Practitioners file.