DANIEL AHN, D.O. — NPI 1932416781 (Board-Certified in Ophthalmology (Medical & Microsurgical Eye Doctor) in SONOMA, CA)

CMS-1500 Box 24J / 33a • NPI

1932416781

Type 1 Individual Rendering/Ordering

HIPAA NUCC Taxonomy • CMS Code

207W00000X (CMS 18)

Board-Certified in Ophthalmology (Medical & Microsurgical Eye Doctor)

Box 32 Service Location & ZIP+4

181 ANDRIEUX ST, SUITE 100, SONOMA, CA, 95476-6932

✓ 9-Digit EDI 837 ZIP+4 (95476-6932)

Practice Phone & Referral Fax

(707) 588-7939

Fax: (707) 588-7941

✓ HHS OIG LEIE Sanction Screening — VERIFIED CLEAR: NPI 1932416781 (DANIEL AHN, D.O.) has 0 active federal exclusions across all 84,224 HHS OIG LEIE sanction records (Database Verified: 2026-11-11).

CMS Medicare Order & Referring PECOS Eligibility

This practitioner does not currently appear in the CMS individual Order & Referring PECOS file (may practice in pediatrics, commercial-only networks, or hospital-employed settings).

Official CMS NPPES Credential & Practice Profile

10-Digit NPI Number	`1932416781` (NPI-1 Individual Practitioner)
Provider / Legal Name	DANIEL AHN, D.O.
Plain-English Specialty	Board-Certified in Ophthalmology (Medical & Microsurgical Eye Doctor) NUCC Code: `207W00000X` (Ophthalmology)
Certifying / Licensing Body	American Board of Ophthalmology (ABO)
Practice Location Address	181 ANDRIEUX ST, SUITE 100, SONOMA, CA, 95476-6932
Practice Telephone / Fax	Tel: (707) 588-7939 \| Fax: (707) 588-7941
Administrative Mailing Address	181 ANDRIEUX ST, SONOMA, CA, 95476-6932
Enumeration & Last Sync	Enumerated: 2010-08-31 \| CMS Record Updated: 2012-07-31

Clinic Location, Accessibility & Directions

📍 Practice Location & Patient Access

181 ANDRIEUX ST, SUITE 100, SONOMA, CA, 95476-6932

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Plain-English Taxonomy & CMS Crosswalk (207W00000X)

What Does Taxonomy Code 207W00000X Mean?

In the HIPAA National Uniform Claim Committee (NUCC) classification, code 207W00000X translates to:
"Board-Certified in Ophthalmology (Medical & Microsurgical Eye Doctor)"

CMS-1500 Medicare Specialty Crosswalk: CMS Code 18 (Physician/Ophthalmology)
Certifying / Accrediting Authority: American Board of Ophthalmology (ABO)
Clinical Scope: Cloudy vision from cataracts, annual diabetic eye exams, glaucoma pressure checks, sudden flashes/floaters, or macular degeneration.

Specialty Clinical Procedures & Therapeutic Classes

Standard Scope of Care (DANIEL AHN, D.O.)

Typical CPT / Diagnostic Procedures:

Phacoemulsification Cataract Extraction with Intraocular Lens (IOL) Implantation (CPT 66984)
Optical Coherence Tomography (OCT) of Retina & Optic Nerve (CPT 92134)
Intravitreal Anti-VEGF Injections for Macular Degeneration & Diabetic Retinopathy
Comprehensive Slit-Lamp Biomicroscopy & Tonometry Glaucoma Screening

Common Therapeutic Classes:

Prostaglandin Analog Eye Drops (Latanoprost, Bimatoprost) & Timolol (Glaucoma)
Moxifloxacin & Ciprofloxacin Ophthalmic Solutions
Prednisolone Acetate & Ketorolac Post-Cataract Ophthalmic Drops

All Registered NUCC Taxonomies & State Licenses

Taxonomy Code & Plain-English Description	State License & Primary Status
`207W00000X` — Ophthalmology Plain English: Board-Certified in Ophthalmology (Medical & Microsurgical Eye Doctor)	State: PA \| License: `OT012630` \| Primary: Secondary
`207W00000X` — Ophthalmology Plain English: Board-Certified in Ophthalmology (Medical & Microsurgical Eye Doctor)	State: CA \| License: `20A12253` \| Primary: Yes (Primary)

Medical Billing, RCM & Hospital Credentialing Teams:

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DANIEL AHN, D.O. (NPI #1932416781)