Daniel Ahn, D.O.
NPI 1932416781 · Ophthalmology Physician · Sonoma, CA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Daniel Ahn, D.O. is a Ophthalmology Physician provider in Sonoma, CA (NPI 1932416781).
Provider details
- NPI number
- 1932416781
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- OT012630 (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
15 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
4,289 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Complete Exam of Visual System92014 | 903 | $134 |
| Photography of the Retina92250 | 810 | $39 |
| Established Patient Problem Focused Exam of Visual System92012 | 351 | $95 |
| Imaging of Optic Nerve92133 | 316 | $36 |
| Exam of the Internal Drainage System of Eye92020 | 292 | $29 |
| Exam of Visual Field With Extended Testing92083 | 292 | $68 |
| Imaging of Retina92134 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 22 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisolone Acetate | 914 | 456 |
| Latanoprost | 618 | 163 |
| Ketorolac Tromethamine | 487 | 272 |
| Ofloxacin | 478 | 270 |
| Lifitegrastbrand: Xiidra | 268 | 108 |
| Neomycin/Polymyxin B/Dexamethabrand: Neomycin-Polymyxin-Dexameth | 226 | 105 |
| Bimatoprostbrand: Lumigan | 150 | 45 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,635 across 49 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-08-31
- Last updated
- 2012-07-31
Frequently asked questions
- What is Daniel Ahn's NPI number?
- Daniel Ahn's National Provider Identifier (NPI) is 1932416781, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Daniel Ahn's specialty?
- Daniel Ahn is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Daniel Ahn located?
- Daniel Ahn's practice location on file with NPPES is 181 Andrieux St, Sonoma, CA 95476-6932.
- What is Daniel Ahn's phone number?
- The practice phone number listed in the NPPES registry for Daniel Ahn is (707) 588-7939.
- Does Daniel Ahn accept Medicare?
- Daniel Ahn is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Daniel Ahn's NPI active?
- Yes — Daniel Ahn's NPI (1932416781) is active in the NPPES registry as of the last update on 2012-07-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.