Hyelin You, MD
NPI 1417539818 · Ophthalmology Physician · Fountain Valley, CA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Hyelin You, MD is a Ophthalmology Physician provider in Fountain Valley, CA (NPI 1417539818).
Provider details
- NPI number
- 1417539818
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A181001 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
5 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 6 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 145 | 51 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 67 | 28 |
| Brimonidine Tartrate | 50 | 21 |
| Prednisolone Acetate | 27 | 21 |
| Timolol Maleate | 19 | — |
| Ketorolac Tromethamine | 17 | 14 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude 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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2021-04-25
- Last updated
- 2025-07-01
- Certified
- 2025-07-01
Frequently asked questions
- What is Hyelin You's NPI number?
- Hyelin You's National Provider Identifier (NPI) is 1417539818, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Hyelin You's specialty?
- Hyelin You is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Hyelin You located?
- Hyelin You's practice location on file with NPPES is 18111 Brookhurst St Ste 6400, Fountain Valley, CA 92708-6728.
- What is Hyelin You's phone number?
- The practice phone number listed in the NPPES registry for Hyelin You is (714) 963-1444.
- Does Hyelin You accept Medicare?
- Hyelin You is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Hyelin You's NPI active?
- Yes — Hyelin You's NPI (1417539818) is active in the NPPES registry as of the last update on 2025-07-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.