Andrew Chen, M.D.
NPI 1912014739 · Ophthalmology Physician · Lodi, CA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Andrew Chen, M.D. is a Ophthalmology Physician provider in Lodi, CA (NPI 1912014739).
Provider details
- NPI number
- 1912014739
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G72858 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 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
6,622 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 | 1,202 | $130 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 1,007 | $92 |
| Established Patient Problem Focused Exam of Visual System92012 | 839 | $93 |
| Imaging of Retina92134 | 759 | $42 |
| Photography of the Retina92250 | 524 | $38 |
| Injection of Drug Into Eye67028 | 408 | $128 |
| Measurement of Corneal Curvature and Depth of Eye |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 28 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 735 | 177 |
| Timolol Maleate | 221 | 56 |
| Bimatoprostbrand: Lumigan | 218 | 62 |
| Brimonidine Tartrate | 173 | 47 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 146 | 34 |
| Dorzolamide Hcl | 126 | 41 |
| Neomycin/Polymyxin B/Dexamethabrand: Neomycin-Polymyxin-Dexameth | 116 | 90 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$309 across 15 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
- 2006-08-25
- Last updated
- 2023-07-14
- Certified
- 2023-07-14
Frequently asked questions
- What is Andrew Chen's NPI number?
- Andrew Chen's National Provider Identifier (NPI) is 1912014739, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Andrew Chen's specialty?
- Andrew Chen is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Andrew Chen located?
- Andrew Chen's practice location on file with NPPES is 521 S Ham Ln, Lodi, CA 95242-3528.
- What is Andrew Chen's phone number?
- The practice phone number listed in the NPPES registry for Andrew Chen is (209) 334-5886.
- Does Andrew Chen accept Medicare?
- Andrew Chen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Andrew Chen's NPI active?
- Yes — Andrew Chen's NPI (1912014739) is active in the NPPES registry as of the last update on 2023-07-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.