Hyelin You, MD
Ophthalmology Physician · Fountain Valley, CA
Hyelin You, MD is an ophthalmology physician with a practice address in Fountain Valley, California, and NPI 1417539818, issued on Apr 25, 2021. Check the license (California A181001, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Hyelin You
- Credential
- MD
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- A181001 CA
Self-reported in NPPES; status is on the state search - Practice location
- 18111 Brookhurst St Ste 6400, Fountain Valley, CA 92708
- Phone
- (714) 963-1444
- Enumerated
- Apr 25, 2021
- Record last updated
- Jul 1, 2025
- Fax
- (714) 963-1234
- Medicare enrollment
- Enrolled (PECOS I20250613003261); accepts Medicare assignment
- Medical or professional school
- Loma Linda University School Of Medicine, 2021
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 2,899 in California → Look up another NPI →
Also registered at 18111 Brookhurst St Ste 6400
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Benjamin Bert, M.D.Ophthalmology Physician1518129964
- Brian Francis, M.D.Ophthalmology Physician1427118348
- Alexander Haueisen, MDOphthalmology Physician1073193611
- Christine Nguyen, M.D.Ophthalmology Physician1780017897
- Angela Oh, MDOphthalmology Physician1881221968
Verify Hyelin You in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A181001Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
75% fewer Medicare Part D claims than the average ophthalmology physician in 2024
377 Medicare Part D claims for 96 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 32% of claims.
Most prescribed
- Latanoprost145 claims
- Dorzolamide-Timolol67 claims
- Brimonidine Tartrate50 claims
- Prednisolone Acetate27 claims
- Timolol Maleate19 claims
- Ketorolac Tromethamine17 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Jules Stein Eye Institute Medical GroupPasadena, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Hyelin You among 2,899 ophthalmology physician records in California
Hyelin You, MD is one of 2,899 ophthalmology physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 96% of them.
- NPI issued2021 · 96% of these records are older, 2% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2021 · median 2001 among the 1,907 with a school on file
- Record last updated2025 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in California
There are 2,899 ophthalmology physician records in California.
All 2,899 in California → Every provider in Fountain Valley → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Arpine BarsegianFountain Valley, CA 927081780070649
- Benjamin Bert, M.D.Fountain Valley, CA 927081518129964
- Mark Bronstein, M.D.Fountain Valley, CA 927081750457404
- Brian Francis, M.D.Fountain Valley, CA 927081427118348
- Vicki Lin, M.D.Fountain Valley, CA 927081326146937
- Lincoln Manzi, MD, INCFountain Valley, CA 927081376592188
- Trung Nguyen, M.D.Fountain Valley, CA 927081316941966
- Tri Nguyen, M.D.Fountain Valley, CA 927081669436002
Common questions
What is Hyelin You, MD's NPI number?
Hyelin You, MD's National Provider Identifier (NPI) is 1417539818, issued on Apr 25, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Hyelin You, MD located?
The NPPES record lists a practice address at 18111 Brookhurst St Ste 6400, Fountain Valley, CA, 92708. Phone: (714) 963-1444. Providers update this record themselves, so call before visiting.
How can I verify Hyelin You, MD's license?
NPPES lists California license number A181001, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Hyelin You, MD prescribe under Medicare Part D?
In 2024, Hyelin You, MD had 377 Medicare Part D claims for 96 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.