On-Tat Lee, M.D.
NPI 1194084517 · Ophthalmology Physician · Stockton, CA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
On-Tat Lee, M.D. is a Ophthalmology Physician provider in Stockton, CA (NPI 1194084517).
Provider details
- NPI number
- 1194084517
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A138659 (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
14 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
3,628 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 Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 952 | $92 |
| Established Patient Complete Exam of Visual System92014 | 933 | $130 |
| Photography of the Retina92250 | 400 | $38 |
| New Patient Complete Exam of Visual System92004 | 317 | $154 |
| Imaging of Retina92134 | 287 | $41 |
| Exam of Visual Field With Extended Testing92083 | 229 | $65 |
| Imaging of Optic Nerve |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 34 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 1,211 | 266 |
| Timolol Maleate | 240 | 74 |
| Brimonidine Tartrate | 217 | 50 |
| Cyclosporine | 185 | 59 |
| Prednisolone Acetate | 167 | 117 |
| Erythromycin Basebrand: Erythromycin | 117 | 89 |
| Cyclosporinebrand: Restasis | 112 | 37 |
| Dorzolamide Hcl/Timolol Maleat |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$269 across 13 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
- 2012-05-04
- Last updated
- 2023-07-14
- Certified
- 2023-07-14
Frequently asked questions
- What is On-Tat Lee's NPI number?
- On-Tat Lee's National Provider Identifier (NPI) is 1194084517, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is On-Tat Lee's specialty?
- On-Tat Lee is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is On-Tat Lee located?
- On-Tat Lee's practice location on file with NPPES is 1617 Saint Marks Plz Ste D, Stockton, CA 95207-6478.
- What is On-Tat Lee's phone number?
- The practice phone number listed in the NPPES registry for On-Tat Lee is (209) 478-1797.
- Does On-Tat Lee accept Medicare?
- On-Tat Lee is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is On-Tat Lee's NPI active?
- Yes — On-Tat Lee's NPI (1194084517) 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.