OrganizationActive
Seungkook Chang MD Inc
NPI 1679874309 · Primary Care Clinic/Center · Walnut, CA
Seungkook Chang MD Inc is a Primary Care Clinic/Center organization in Walnut, CA (NPI 1679874309).
Provider details
- NPI number
- 1679874309
- Entity type
- Organization
- Primary specialty
- Primary Care Clinic/CenterAmbulatory Health Care Facilities
- Organization subpart
- No
- Authorized official
- Seung Chang, President(909) 598-5228
- License
- A35067 (CA)
Specialties & taxonomies
Ambulatory Health Care Facilities
Profile Score
Detailed profile(82/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
15 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
19687 Valley Blvd
Walnut, CA 91789-2146
Phone: (909) 598-5228
Fax: (909) 598-9021
Approximate (ZIP-level) locationGet directions
Mailing address
19687 Valley Blvd
Walnut, CA 91789-2146
Other names (DBA / former)
- Doing business as
- Walnut Medical Group
Registry dates
- Enumerated
- 2010-11-11
- Last updated
- 2010-11-11
Frequently asked questions
- What is Seungkook Chang MD Inc's NPI number?
- Seungkook Chang MD Inc's National Provider Identifier (NPI) is 1679874309, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Seungkook Chang MD Inc?
- Seungkook Chang MD Inc is classified in the NPPES registry as Primary Care Clinic/Center (Ambulatory Health Care Facilities).
- Where is Seungkook Chang MD Inc located?
- Seungkook Chang MD Inc's practice location on file with NPPES is 19687 Valley Blvd, Walnut, CA 91789-2146.
- What is Seungkook Chang MD Inc's phone number?
- The practice phone number listed in the NPPES registry for Seungkook Chang MD Inc is (909) 598-5228.
- Who is the authorized official for Seungkook Chang MD Inc?
- The authorized official listed on Seungkook Chang MD Inc's NPPES record is Seung Chang, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Seungkook Chang MD Inc's NPI active?
- Yes — Seungkook Chang MD Inc's NPI (1679874309) is active in the NPPES registry as of the last update on 2010-11-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.