Chee Tan, M.D., PH.D.
NPI 1346263357 · Ophthalmology Physician · Pasadena, CA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Chee Tan, M.D., PH.D. is a Ophthalmology Physician provider in Pasadena, CA (NPI 1346263357).
Provider details
- NPI number
- 1346263357
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D., PH.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A111014 (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
2,914 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 | 864 | $140 |
| Established Patient Problem Focused Exam of Visual System92012 | 553 | $99 |
| Imaging of Retina92134 | 296 | $44 |
| Exam of Visual Field With Extended Testing92083 | 237 | $71 |
| Photography of the Retina92250 | 233 | $40 |
| Imaging of Optic Nerve92133 | 232 | $38 |
| Measurement of Corneal Curvature and Depth of Eye92136 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 15 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 550 | 152 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 164 | 50 |
| Prednisolone Acetate | 157 | 105 |
| Ofloxacin | 127 | 105 |
| Diclofenac Sodium | 122 | 77 |
| Timolol Maleate | 116 | 46 |
| Brimonidine Tartrate | 97 | 33 |
| Tafluprost/Pfbrand: Tafluprost |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$22 across 1 record (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
- 2006-07-25
- Last updated
- 2015-01-16
Frequently asked questions
- What is Chee Tan's NPI number?
- Chee Tan's National Provider Identifier (NPI) is 1346263357, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Chee Tan's specialty?
- Chee Tan is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Chee Tan located?
- Chee Tan's practice location on file with NPPES is 625 S Fair Oaks Ave, Pasadena, CA 91105-2613.
- What is Chee Tan's phone number?
- The practice phone number listed in the NPPES registry for Chee Tan is (626) 817-4747.
- Does Chee Tan accept Medicare?
- Chee Tan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Chee Tan's NPI active?
- Yes — Chee Tan's NPI (1346263357) is active in the NPPES registry as of the last update on 2015-01-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.