OrganizationActive
Chun K. Ryu, M.D.
NPI 1275620429 · Psychiatry Physician · Santa Ana, CA
Chun K. Ryu, M.D. is a Psychiatry Physician organization in Santa Ana, CA (NPI 1275620429).
Provider details
- NPI number
- 1275620429
- Entity type
- Organization
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Chun Ryu, Medical Doctor, Psychiatrist(714) 543-4447
- License
- A25717 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(90/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 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.
Practice location
1633 E 4th St
138
Santa Ana, CA 92701-5163
Phone: (714) 543-4447
Fax: (714) 543-4488
Street-level locationGet directions
Mailing address
1633 E 4th St
Santa Ana, CA 92701-5163
Other names (DBA / former)
- Other name
- Chun K. Ryu, M.D.
Registry dates
- Enumerated
- 2006-10-09
- Last updated
- 2008-10-09
Frequently asked questions
- What is Chun K. Ryu, M.D.'s NPI number?
- Chun K. Ryu, M.D.'s National Provider Identifier (NPI) is 1275620429, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Chun K. Ryu, M.D.?
- Chun K. Ryu, M.D. is classified in the NPPES registry as Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Chun K. Ryu, M.D. located?
- Chun K. Ryu, M.D.'s practice location on file with NPPES is 1633 E 4th St, Santa Ana, CA 92701-5163.
- What is Chun K. Ryu, M.D.'s phone number?
- The practice phone number listed in the NPPES registry for Chun K. Ryu, M.D. is (714) 543-4447.
- Who is the authorized official for Chun K. Ryu, M.D.?
- The authorized official listed on Chun K. Ryu, M.D.'s NPPES record is Chun Ryu, Medical Doctor, Psychiatrist. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Chun K. Ryu, M.D.'s NPI active?
- Yes — Chun K. Ryu, M.D.'s NPI (1275620429) is active in the NPPES registry as of the last update on 2008-10-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.