1. Home
  2. Directory
  3. California
  4. Buena Park
  5. Internal Medicine
  6. NPI Profile

CHANGSOO MEDICAL GROUP
NPI 1790496107
Internal Medicine in Buena Park, CA

Active since December 06, 2022
5832 BEACH BLVD UNIT 214, BUENA PARK, CA 90621(714) 523-7575(714) 523-7585 Get Directions Write a Review

NPPES record last updated: May 5, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: May 5, 2025, Dec 6, 2022 (2 updates tracked since 2022).

About Changsoo Medical Group NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

CHANGSOO MEDICAL GROUP (NPI 1790496107) is a healthcare organization registered as an internal medicine in Buena Park, California and active in the NPI registry since December 2022. The organization lists Grace Yoon, Office Manger, as its authorized official.

NPPES Registry Identity

NPI1790496107
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameCHANGSOO MEDICAL GROUP
Location Address5832 BEACH BLVD UNIT 214Buena Park, CA 90621-5501
Mailing Address5832 Beach Blvd Unit 214Buena Park, CA 90621-5501 · (714) 523-7575
Phone(714) 523-7575
Fax(714) 523-7585
Organization SubpartNo
Authorized OfficialGrace YoonOffice Manger · (562) 335-0008
Enumeration DateDecember 6, 2022
Last NPPES UpdateMay 5, 20252 updates tracked since enumeration
NPPES CertifiedMay 5, 2025
✔ NPI 1790496107 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
5832 BEACH BLVD UNIT 214, Buena Park, CA 90621
Open in Google Maps ↗

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Changsoo Medical Group is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

2

Medicare enrollment records show 2 clinicians reassign Medicare billing to Changsoo Medical Group, which bills Medicare for the services they deliver. Of these, 1 practice at this address and 2 within 10 miles. They are listed nearest first.

Clinicians, nearest first (2)

Paul Chang, M.D.
Internal Medicine
NPI 1487627261
5832 BEACH BLVD UNIT 214
Buena Park, CA 90621
(714) 523-7575
✔ PECOS✔ Accepts MedicareSame address
Daniel Kwon, DO
Family Practice
NPI 1639736846
14023 PARAMOUNT BLVD
Paramount, CA 90723
(562) 286-6815
✔ PECOS✔ Accepts Medicare9.6 mi

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Changsoo Medical Group's NPI number?

The NPI number for Changsoo Medical Group is 1790496107. It was assigned to this organization in the NPPES registry on December 6, 2022.

Where is Changsoo Medical Group located?

Changsoo Medical Group is located at 5832 Beach Blvd Unit 214, Buena Park, CA 90621. The listed phone number is (714) 523-7575.

What is Changsoo Medical Group's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Changsoo Medical Group enrolled in Medicare?

Yes. Changsoo Medical Group is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Changsoo Medical Group?

According to the CMS Revalidation Reassignment List (October 2026 release), 2 clinicians reassign their Medicare billing to Changsoo Medical Group, in Family Practice and Internal Medicine. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Of these, 1 practice at this address and 2 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Changsoo Medical Group was last updated on May 5, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.