Charles Soonkyu Ahn, MD
Ophthalmology Physician · Naperville, IL
Charles Soonkyu Ahn, MD is an ophthalmology physician with a practice address in Naperville, Illinois, and NPI 1942260278, issued on Mar 23, 2006. Check the license (Illinois 36098124, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Charles Soonkyu Ahn
- Credential
- MD
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- 36098124 IL
Self-reported in NPPES; status is on the state search - Practice location
- 808 Rickert Dr Ste 201, Naperville, IL 60540
- Phone
- (630) 355-8000
- Enumerated
- Mar 23, 2006
- Record last updated
- Aug 3, 2023
- Medicaid ID
- 036098124 IL
- Medicare enrollment
- Enrolled (PECOS I20060619000144); accepts Medicare assignment
- Medical or professional school
- University Of Michigan Medical School, 1993
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 898 in Illinois → Look up another NPI →
Also registered at 808 Rickert Dr Ste 201
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sabriya Ansari, O.D.Optometrist1295080687
- Anurag Gupta, MDOphthalmology Physician1942224712
- Jonathan Ismond, ODOptometrist1578133211
- Aaron Kelly, O.D.Optometrist1679761308
- Shantan Reddy, MD MPHOphthalmology Physician1881724995
- Scott Stoller, MDOphthalmology Physician1912007154
Verify Charles Soonkyu Ahn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 36098124Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
59% more Medicare Part D claims than the average ophthalmology physician in 2024
2,417 Medicare Part D claims for 688 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 55% of claims.
Most prescribed
- Prednisolone Acetate1,109 claims
- Ofloxacin732 claims
- Latanoprost124 claims
- Ketorolac Tromethamine79 claims
- Timolol Maleate35 claims
- Tobramycin34 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $42.37
2 payments; by number, the most common kind was food and beverage; the largest payer was Johnson & Johnson Surgical Vision, Inc. The 13,221 providers of this specialty with any payment received $4,535.02 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Dupage Medical Group LtdNaperville, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Charles Soonkyu Ahn among 898 ophthalmology physician records in Illinois
Charles Soonkyu Ahn, MD is one of 898 ophthalmology physician records with a practice address in Illinois. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 16% of them.
- NPI issued2006 · 16% of these records are older, 44% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated1993 · median 1999 among the 551 with a school on file
- Record last updated2023 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in Illinois
There are 898 ophthalmology physician records in Illinois.
All 898 in Illinois → Every provider in Naperville → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- F Cox, M.D.Naperville, IL 605401528081684
- Daniel Debartolo, M.D.Naperville, IL 605401659392868
- Anurag Gupta, MDNaperville, IL 605401942224712
- Jogin Jose, MDNaperville, IL 605401417489238
- Eric Kim, MDNaperville, IL 605401326576968
- Shantan Reddy, MD MPHNaperville, IL 605401881724995
- Scott Stoller, MDNaperville, IL 605401912007154
- Karl Fritz, M.D.Plainfield, IL 605441487949202
Common questions
What is Charles Soonkyu Ahn, MD's NPI number?
Charles Soonkyu Ahn, MD's National Provider Identifier (NPI) is 1942260278, issued on Mar 23, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Charles Soonkyu Ahn, MD located?
The NPPES record lists a practice address at 808 Rickert Dr Ste 201, Naperville, IL, 60540. Phone: (630) 355-8000. Providers update this record themselves, so call before visiting.
How can I verify Charles Soonkyu Ahn, MD's license?
NPPES lists Illinois license number 36098124, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Charles Soonkyu Ahn, MD prescribe under Medicare Part D?
In 2024, Charles Soonkyu Ahn, MD had 2,417 Medicare Part D claims for 688 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.