Independent US Healthcare Provider Directory & Public Medical Database
Active NPI 1932416781 Individual Practitioner Male Practitioner

Dr. Daniel Ahn , DO

Ophthalmology • Sonoma, CA

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Daniel Ahn, DO is a certified Ophthalmology practicing in Sonoma, CA. With approximately 18 years of clinical experience since graduating from New York College Of Osteo Medicine Of New York Institute Of Technology in 2008, Dr. Ahn delivers high-quality medical care to the local community at 181 ANDRIEUX ST.

Dr. Ahn is affiliated with Horizon Medical Group Pc and accepts Medicare assignment.

Frequently performed procedures and clinical services include established patient complete exam of visual system, photography of the retina, established patient problem focused exam of visual system. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

181 Andrieux St
Suite 100

Sonoma, CA 954766932

Telephone 7075887939
Fax 7075887941
Associated Practice Facility / Clinic
🏢 J. Nevin Smith, M.d., Inc Facility NPI 1467649434

Medicare Profile & Education

Medical School

New York College Of Osteo Medicine Of New York Institute Of Technology

Graduation Year

2008

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Ophthalmology in Sonoma, CA

Established Specialist (10-20 Yrs)
Practitioner Clinical Experience
18 Yrs Matches City Avg
City Avg: 18.0 Yrs
State Avg: 29.5 Yrs
Regional Practice Density
3 Specialists

Practicing in Sonoma, CA (3116 Statewide)

Telehealth Adoption Rate
0.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount
56.7% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Ahn (18 Years) 18 Yrs
Sonoma Specialty Average (18.0 Years) 18.0 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
903 707 $242.10 $133.92
92250 Photography of the retina
810 773 $155.64 $39.41
92012 Established patient problem focused exam of visual system
351 236 $167.08 $95.38
92133 Imaging of optic nerve
316 270 $119.00 $36.19
92020 Examination of cornea and iris using lens device and slit lamp
292 289 $54.40 $28.93
92083 Exam of visual field with extended testing
292 274 $178.58 $67.96
92134 Imaging of retina
261 242 $122.00 $41.88
66984 Removal of cataract with insertion of lens
186 100 $1536.58 $558.26
92004 New patient complete exam of visual system
168 168 $292.08 $158.92
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
140 138 $213.00 $135.41
92136 Measurement of corneal curvature and depth of eye
138 132 $175.66 $48.43
66821 Removal of recurring cataract in lens capsule using a laser
116 65 $656.98 $357.21
92025 Ct scan of cornea
86 86 $73.54 $34.87
65855 Laser repair to improve eye fluid flow
73 38 $683.66 $216.64
66761 Creation of eye fluid drainage tracts in iris using a laser, per session
52 27 $660.16 $299.27
G2211 Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's
22 20 $43.00 $17.19
80048 Blood test, basic group of blood chemicals (calcium, total)
20 19 $17.86 $8.29
36415 Insertion of needle into vein for collection of blood sample
17 16 $15.00 $8.65
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
17 17 $328.00 $168.71
76514 Ultrasound scan of cornea to determine thickness
15 15 $29.04 $11.40
99213 Established patient office or other outpatient visit, typically 15 minutes
14 12 $144.00 $92.51

Medical Specialties & State Licenses

Ophthalmology Primary Specialty

NUCC Taxonomy Code: 207W00000X

State License CA 20A12253

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.

Ophthalmology

NUCC Taxonomy Code: 207W00000X

State License PA OT012630

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.

Hospital & Practice Group Affiliations

Horizon Medical Group Pc

21 Edward J Lempka Dr, Florida, NY 109210001

Phone: 8456511777

Horizon Medical Group Pc

1460 State Route 17m, Chester, NY 109181054

Phone: 8454694211

Horizon Medical Group Pc

90 E Main St, Washingtonville, NY 109922302

Phone: 8454962400

Horizon Medical Group Pc

1460 State Route 17m, Chester, NY 109181054

Phone: 8456511400

Horizon Medical Group Pc

70 Dubois St, Newburgh, NY 125504851

Phone: 8455614400

Horizon Medical Group Pc

30 Hatfield Ln, Goshen, NY 109246768

Practice Associates & Co-Workers

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

19 Associated Practitioners
Dr. Kenneth Geiger , MD

Orthopaedic Surgery

NPI 1184600132

Doctor of Medicine (M.D.)

Dr. Robert Koida , MD

Family Medicine

NPI 1275646507

Doctor of Medicine (M.D.)

NPI 1285077677

Licensed Acupuncturist

Nasreen Taymuree

Physician Assistant

NPI 1316176431
Margaret Leisz , FNP

Nurse Practitioner - Family

NPI 1326581331

Family Nurse Practitioner

NPI 1386714517

Doctor of Chiropractic

Career & Practice History Timeline

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

6 Historical Events
NPI Profile Active July 31, 2012

NPI status registered as active in NPPES database

📍
Updated Practice Location July 31, 2012

Registered at 181 ANDRIEUX ST, SUITE 100, SONOMA, CA 954766932 (Tel: 7075887939)

📍
Updated Business Mailing Address July 31, 2012

Registered at 181 ANDRIEUX ST, SUITE 100, SONOMA, CA 954766932 (Tel: 7075887939)

👤
Provider Name / Credentials Updated July 31, 2012

Recorded as DANIEL AHN, D.O.

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) July 31, 2012

Ophthalmology (License #20A12253 in CA)

🟢
Initial NPI Registration & Enumeration August 31, 2010

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: 1932416781
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: August 31, 2010
Last Update: July 31, 2012
Sole Proprietor: No

Mailing Address

181 Andrieux St, Suite 100

Sonoma, CA 954766932

Phone: 7075887939

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.