Active NPI 1942260278 Individual Practitioner Male Practitioner

Dr. Charles Soonkyu Ahn , MD

Ophthalmology • Naperville, IL

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Charles Ahn, MD is a certified Ophthalmology practicing in Naperville, IL. With approximately 33 years of clinical experience since graduating from University Of Michigan Medical School in 1993, Dr. Ahn delivers high-quality medical care to the local community at 808 RICKERT DR STE 201.

Dr. Ahn is affiliated with Dupage Medical Group Ltd and accepts Medicare assignment.

Frequently performed procedures and clinical services include established patient complete exam of visual system, removal of cataract with insertion of lens, measurement of corneal curvature and depth of eye. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

808 Rickert Dr Ste 201

Naperville, IL 605400910

Telephone 6303558000

Associated Practice Facility / Clinic

🏢 Dupage Medical Group, Ltd. Facility NPI 1295970713

Medicare Profile & Education

Medical School

University Of Michigan Medical School

Graduation Year

1993

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Ophthalmology in Naperville, IL

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

33 Yrs +9.3 yrs vs City Avg

City Avg: 23.7 Yrs

State Avg: 31.1 Yrs

Regional Practice Density

13 Specialists

Practicing in Naperville, IL (954 Statewide)

Telehealth Adoption Rate

0.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

68.0% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Ahn (33 Years) 33 Yrs

Naperville Specialty Average (23.7 Years) 23.7 Yrs

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2024)

Reporting Year:

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
92014 Established patient complete exam of visual system	487	473	$264.00	$128.13
66984 Removal of cataract with insertion of lens	287	177	$2337.00	$546.29
92136 Measurement of corneal curvature and depth of eye	271	202	$192.00	$41.88
92012 Established patient problem focused exam of visual system	178	106	$183.00	$90.86
92004 New patient complete exam of visual system	136	136	$316.00	$151.47
66821 Removal of recurring cataract in lens capsule using a laser	122	97	$1041.00	$337.31
92025 Ct scan of cornea	19	12	$80.00	$36.45
92286 Imaging of front third of eye using a special microscope	18	17	$200.00	$39.96
66761 Creation of eye fluid drainage tracts in iris using a laser, per session	16	16	$900.00	$305.58
65756 Transplantation of outer layer of corneal tissue	15	14	$3507.00	$1173.20
92134 Imaging of retina	14	13	$94.00	$40.41
99202 New patient office or other outpatient visit, typically 20 minutes	12	12	$160.00	$74.40

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
92014 Established patient complete exam of visual system	525	504	$264.00	$130.40
66984 Removal of cataract with insertion of lens	372	233	$2337.00	$551.80
92136 Measurement of corneal curvature and depth of eye	338	250	$192.00	$42.02
92012 Established patient problem focused exam of visual system	199	111	$183.00	$93.23
92004 New patient complete exam of visual system	151	151	$316.00	$154.45
66821 Removal of recurring cataract in lens capsule using a laser	99	80	$1041.00	$344.54
92134 Imaging of retina	30	26	$94.00	$40.86
92286 Imaging of front third of eye using a special microscope	22	22	$200.00	$40.51
92025 Ct scan of cornea	21	21	$80.00	$36.63
66761 Creation of eye fluid drainage tracts in iris using a laser, per session	17	13	$900.00	$311.22
65756 Transplantation of outer layer of corneal tissue	12	11	$3507.00	$1211.73

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
92014 Established patient complete exam of visual system	509	495	$264.00	$132.52
66984 Removal of cataract with insertion of lens	357	213	$2337.00	$560.70
92136 Measurement of corneal curvature and depth of eye	316	241	$192.00	$45.06
92012 Established patient problem focused exam of visual system	208	104	$183.00	$93.92
92004 New patient complete exam of visual system	186	186	$316.00	$157.12
66821 Removal of recurring cataract in lens capsule using a laser	116	100	$1049.97	$350.82
U0003 Infectious agent detection by nucleic acid (dna or rna); severe acute respiratory syndrome coronavirus 2 (sars-cov-2) (coronavirus disease [covid-19]), amplified probe technique, making use of high throughput technologies as described by cms-2020-01-r	108	72	$300.00	$74.74
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	90	64	$43.00	$24.73
U0005 Infectious agent detection by nucleic acid (dna or rna); severe acute respiratory syndrome coronavirus 2 (sars-cov-2) (coronavirus disease [covid-19]), amplified probe technique, cdc or non-cdc, making use of high throughput technologies, completed within	85	62	$75.00	$24.91
92025 Ct scan of cornea	27	27	$80.00	$37.08
65756 Transplantation of outer layer of corneal tissue	23	19	$3507.00	$1163.80
92286 Imaging of front third of eye using a special microscope	22	22	$200.00	$40.54
66761 Creation of eye fluid drainage tracts in iris using a laser, per session	21	18	$900.00	$317.24
92134 Imaging of retina	14	14	$94.00	$39.98
99202 New patient office or other outpatient visit, typically 20 minutes	12	12	$160.00	$77.39

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
92014 Established patient complete exam of visual system	470	459	$264.00	$135.91
92136 Measurement of corneal curvature and depth of eye	327	240	$192.00	$49.26
66984 Removal of cataract with insertion of lens	287	186	$2337.00	$574.54
U0003 Infectious agent detection by nucleic acid (dna or rna); severe acute respiratory syndrome coronavirus 2 (sars-cov-2) (coronavirus disease [covid-19]), amplified probe technique, making use of high throughput technologies as described by cms-2020-01-r	280	180	$300.00	$75.00
92004 New patient complete exam of visual system	228	228	$316.00	$160.47
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	226	157	$43.00	$24.58
92012 Established patient problem focused exam of visual system	199	115	$183.00	$96.09
66821 Removal of recurring cataract in lens capsule using a laser	107	86	$1041.00	$362.36
99202 New patient office or other outpatient visit, typically 20 minutes	16	16	$160.00	$78.99
66761 Creation of eye fluid drainage tracts in iris using a laser, per session	15	13	$900.00	$327.24
92286 Imaging of front third of eye using a special microscope	15	15	$200.00	$41.80
92025 Ct scan of cornea	15	15	$80.00	$38.97
65756 Transplantation of outer layer of corneal tissue	14	13	$3507.00	$1260.26

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
92014 Established patient complete exam of visual system	494	479	$264.00	$134.92
66984 Removal of cataract with insertion of lens	385	232	$2337.00	$574.19
92136 Measurement of corneal curvature and depth of eye	321	240	$192.00	$51.87
92012 Established patient problem focused exam of visual system	177	106	$183.00	$93.34
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	165	116	$43.00	$24.98
92004 New patient complete exam of visual system	158	158	$316.00	$157.50
U0003 Infectious agent detection by nucleic acid (dna or rna); severe acute respiratory syndrome coronavirus 2 (sars-cov-2) (coronavirus disease [covid-19]), amplified probe technique, making use of high throughput technologies as described by cms-2020-01-r	108	77	$300.00	$100.00
66821 Removal of recurring cataract in lens capsule using a laser	103	82	$1041.00	$358.92
92286 Imaging of front third of eye using a special microscope	20	20	$200.00	$41.43
65756 Transplantation of outer layer of corneal tissue	16	15	$3507.00	$1278.00
66982 Complex removal of cataract with insertion of prosthetic lens	14	11	$2765.00	$750.53
92025 Ct scan of cornea	14	12	$80.00	$39.04

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
92014 Established patient complete exam of visual system	619	596	$264.00	$133.88
66984 Removal of cataract with insertion of lens	480	297	$2337.00	$681.80
92136 Measurement of corneal curvature and depth of eye	360	325	$192.00	$68.98
92004 New patient complete exam of visual system	261	261	$316.00	$158.59
92012 Established patient problem focused exam of visual system	204	118	$183.00	$91.77
66821 Removal of recurring cataract in lens capsule using a laser	128	107	$1041.00	$356.17
92286 Imaging of front third of eye using a special microscope	25	25	$200.00	$41.13
66982 Complex removal of cataract with insertion of prosthetic lens	23	19	$2765.00	$833.35
65756 Transplantation of outer layer of corneal tissue	22	22	$3507.00	$1270.90
66761 Creation of eye fluid drainage tracts in iris using a laser, per session	19	16	$900.00	$321.40

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
92014 Established patient complete exam of visual system	502	481	$264.00	$131.61
66984 Removal of cataract with insertion of lens	431	279	$2337.00	$671.32
92136 Measurement of corneal curvature and depth of eye	400	317	$192.00	$69.17
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	202	201	$229.00	$112.88
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	154	154	$359.00	$173.51
66821 Removal of recurring cataract in lens capsule using a laser	140	113	$1041.00	$350.20
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	116	75	$94.00	$45.81
92012 Established patient problem focused exam of visual system	107	88	$183.00	$91.25
92004 New patient complete exam of visual system	94	94	$316.00	$157.99
92286 Imaging of front third of eye using a special microscope	27	27	$200.00	$39.70
92025 Ct scan of cornea	26	18	$80.00	$39.61
66982 Complex removal of cataract with insertion of prosthetic lens	23	21	$2765.00	$841.93
83861 Microfluid analysis of tears	23	12	$86.00	$22.03
66761 Creation of eye fluid drainage tracts in iris using a laser, per session	19	16	$900.00	$315.91
92134 Imaging of retina	18	18	$94.00	$41.65
65756 Transplantation of outer layer of corneal tissue	14	11	$3507.00	$1254.82
92083 Exam of visual field with extended testing	12	12	$180.00	$61.86

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
92014 Established patient complete exam of visual system	645	619	$264.00	$128.75
92136 Measurement of corneal curvature and depth of eye	448	311	$192.00	$70.67
66984 Removal of cataract with insertion of lens	445	285	$2337.00	$656.17
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	200	200	$359.00	$172.24
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	151	75	$94.00	$45.93
66821 Removal of recurring cataract in lens capsule using a laser	137	112	$1041.00	$345.79
92012 Established patient problem focused exam of visual system	102	89	$183.00	$89.29
83861 Microfluid analysis of tears	60	30	$86.00	$22.21
92025 Ct scan of cornea	37	14	$80.00	$39.42
92286 Imaging of front third of eye using a special microscope	34	34	$200.00	$39.35
66761 Creation of eye fluid drainage tracts in iris using a laser, per session	31	25	$900.00	$311.58
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	31	31	$229.00	$112.68
65756 Transplantation of outer layer of corneal tissue	31	25	$3507.00	$1248.84
92250 Photography of the retina	26	26	$150.00	$66.59
66982 Complex removal of cataract with insertion of prosthetic lens	25	23	$2765.00	$814.04
92134 Imaging of retina	23	20	$94.00	$41.84
92004 New patient complete exam of visual system	20	20	$316.00	$155.45
68761 Closure of tear duct opening using plug	18	11	$423.00	$124.94
92002 New patient problem focused exam of visual system	13	13	$174.00	$84.64

Medical Specialties & State Licenses

CMS Verified: 2023-08-03

Ophthalmology Primary Specialty

NUCC Taxonomy Code: 207W00000X

State License IL 36098124

An ophthalmologist has the knowledge and professional skills needed to provide comprehensive eye and vision care. Ophthalmologists are medically trained to diagnose, monitor and medically or surgically treat all ocular and visual disorders. This includes problems affecting the eye and its component structures, the eyelids, the orbit and the visual pathways. In so doing, an ophthalmologist prescribes vision services, including glasses and contact lenses.

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid State Provider ID

036098124 (IL)

Commercial Insurance / Payer ID Railroad Medicare

P00447354 (IL)

Hospital & Practice Group Affiliations

Dupage Medical Group Ltd

808 Rickert Dr, Naperville, IL 605400905

Phone: 6303558000

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

8 Associated Practitioners

Dr. Mark Daniels , MD

Internal Medicine - Gastroenterology

NPI 1043215718

Doctor of Medicine (M.D.)

Dr. Danny Jandali , MD

Otolaryngology

NPI 1063827590

Doctor of Medicine (M.D.)

Dr. Marilyn Mistry , MD

Family Medicine

NPI 1164457032

Doctor of Medicine (M.D.)

Dr. Kenneth Sanders , MD

Orthopaedic Surgery

NPI 1275501777

Doctor of Medicine (M.D.)

Dr. Matthew Purkey , MD

Otolaryngology - Otolaryngology/Facial Plastic Surgery

NPI 1649669433

Doctor of Medicine (M.D.)

Dr. Emily Kopperud , AuD

Audiologist

NPI 1659257632

Doctor of Audiology

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

8 Historical Events

📍

Updated Business Mailing Address August 03, 2023

Registered at PO BOX 713260, CHICAGO, IL 606771260 (Tel: 6304699200)

📍

Updated Practice Location February 08, 2021

Registered at 808 RICKERT DR STE 201, NAPERVILLE, IL 605400910 (Tel: 6303558000)

✅

NPI Profile Active January 20, 2011

NPI status registered as active in NPPES database

📍

Updated Practice Location January 20, 2011

Registered at 1327 BUTTERFIELD RD, STE 618, DOWNERS GROVE, IL 605151078 (Tel: 6303228300)

📍

Updated Business Mailing Address January 20, 2011

Registered at 1860 PAYSPHERE CIR, CHICAGO, IL 606740018

👤

Provider Name / Credentials Updated January 20, 2011

Recorded as CHARLES AHN, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) January 20, 2011

Ophthalmology (License #36098124 in IL)

🟢

Initial NPI Registration & Enumeration March 23, 2006

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1942260278

Entity Type:

Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)

Enumeration Date: March 23, 2006

Last Update: August 03, 2023

Sole Proprietor: No

Update or Correct Profile

Mailing Address

Po Box 713260

Chicago, IL 606771260

Phone: 6304699200

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).

⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.