Tien Johnny Cao-Nguyen, OD
NPI 1477121713 · Optometrist · Encinitas, CA
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tien Johnny Cao-Nguyen, OD is a Optometrist provider in Encinitas, CA (NPI 1477121713).
Provider details
- NPI number
- 1477121713
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- OD
- Sex
- Male
- Sole proprietor
- No
- License
- TUV009413-01 (NY)
Specialties & taxonomies
Eye and Vision Services Providers
Eye and Vision Services Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
5 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
840 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) |
|---|---|---|
| Photography of the Retina92250 | 282 | $41 |
| Established Patient Complete Exam of Visual System92014 | 222 | $141 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 83 | $140 |
| Established Patient Problem Focused Exam of Visual System92012 | 66 | $100 |
| Imaging of Optic Nerve92133 | 58 | $39 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 51 | $100 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 146 | 46 |
| Timolol Maleate | 38 | 13 |
| Lifitegrastbrand: Xiidra | 23 | 17 |
| Bimatoprostbrand: Lumigan | 21 | — |
| Cyclosporinebrand: Restasis | 18 | — |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 17 | — |
| Cyclosporine | 15 | — |
These counts cover prescriptions paid through Medicare Part D in 2024 — they include cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$167 across 8 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
- 2021-06-14
- Last updated
- 2023-03-22
- Certified
- 2023-03-22
Frequently asked questions
- What is Tien Johnny Cao-Nguyen's NPI number?
- Tien Johnny Cao-Nguyen's National Provider Identifier (NPI) is 1477121713, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tien Johnny Cao-Nguyen's specialty?
- Tien Johnny Cao-Nguyen is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Tien Johnny Cao-Nguyen located?
- Tien Johnny Cao-Nguyen's practice location on file with NPPES is 477 N El Camino Real Ste C202, Encinitas, CA 92024-1332.
- What is Tien Johnny Cao-Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Tien Johnny Cao-Nguyen is (760) 631-3500.
- Does Tien Johnny Cao-Nguyen accept Medicare?
- Tien Johnny Cao-Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tien Johnny Cao-Nguyen's NPI active?
- Yes — Tien Johnny Cao-Nguyen's NPI (1477121713) is active in the NPPES registry as of the last update on 2023-03-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.