John Ilsun Ryu, OD
- Hospital affiliations
- 1
- State license
- 1
- Year NPI issued
- 2006
- Practice address
- 14445 Olive View Drive, Sylmar, CA 91342
- Practice phone
- Call (818) 364-1555
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find John Ryu's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
John Ilsun Ryu is an optometrist in Sylmar, California
John Ryu practices at Olive View-UCLA Medical Center in Sylmar, California, part of County of Los Angeles.
John Ryu's NPI, 1609946847, was assigned on November 8, 2006. John Ryu holds California license 11209T.
- NPI
- 1609946847NPI Registry (opens in a new tab)
- NPI enumeration date
- November 8, 2006
- NPI status
- Active
- Practice phone
- (818) 364-1555
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
John Ilsun Ryu practices at Olive View-UCLA Medical Center in Sylmar, California
John Ryu's primary practice is Olive View-UCLA Medical Center, at 14445 Olive View Drive, Sylmar, CA 91342 in Los Angeles County. The practice phone is (818) 364-1555.
- Olive View-UCLA Medical Center14445 Olive View Drive, Sylmar, CA 91342 · Los Angeles CountyPhone(818) 364-1555
Source: Dmand AI Affiliation Data
John Ilsun Ryu is affiliated with 2 sites of care
John Ryu's primary practice is Olive View-UCLA Medical Center in Sylmar, California, part of County of Los Angeles. Dmand AI also links John Ryu to 1 physician office, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at John Ilsun Ryu's practice
Dmand AI tracks the electronic health record (EHR) system at each site where John Ryu practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Olive View-UCLA Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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John Ilsun Ryu is one of 7,206 optometrists in California
Optometrist is John Ryu's primary specialty in the NPI Registry, under taxonomy code 152W00000X. John Ryu is licensed in California.
Specialties and state licenses
- Optometrist, CaliforniaPrimary
Optometrists near John Ryu
Counts of optometrists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
John Ilsun Ryu's patients have a median age of 54
Across all payers, Dmand AI patient panel data puts John Ryu's median patient age at 54, with 88% women.
John Ryu's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 54
Patient panel by sex, all payers
- Women88%
- Men13%
Source: Dmand AI Patient Panel Data
Sources for John Ilsun Ryu's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about John Ilsun Ryu
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is John Ilsun Ryu's NPI number?
John Ilsun Ryu's NPI number is 1609946847. It was assigned on November 8, 2006, and it is active in the NPI Registry.
What does John Ilsun Ryu specialize in?
John Ilsun Ryu is an optometrist in Sylmar, California. The primary specialty in the NPI Registry is Optometrist (taxonomy code 152W00000X).
Where does John Ilsun Ryu practice?
John Ryu practices at 14445 Olive View Drive, Sylmar, CA 91342. John Ryu's primary practice is Olive View-UCLA Medical Center in Sylmar, California, part of County of Los Angeles. Dmand AI also links John Ryu to 1 physician office.
What is John Ilsun Ryu's office phone number?
The practice phone on file for John Ryu is (818) 364-1555.
What is John Ilsun Ryu's medical license number?
John Ryu holds California license 11209T.
Which hospitals is John Ilsun Ryu affiliated with?
John Ryu practices at Olive View-UCLA Medical Center in Sylmar, California.
How long has John Ilsun Ryu been practicing?
John Ryu's NPI was assigned in 2006.
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