CHANG MEDICAL, A PROFESSIONAL CORPORATION
NPI 1609441070
Internal Medicine - Pulmonary Disease in Monterey Park, CA
About Chang Medical, A Professional Corporation NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CHANG MEDICAL, A PROFESSIONAL CORPORATION (NPI 1609441070) is a healthcare organization registered as a pulmonary disease in Monterey Park, California and active in the NPI registry since May 2021. The organization lists William Yow-jung Chang, Owner, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Chang Medical, A Professional Corporation is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
Medicare enrollment records show 1 clinician reassigns Medicare billing to Chang Medical, A Professional Corporation, which bills Medicare for the services this clinician delivers.
Clinician (1)
Monterey Park, CA 91754
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 Chang Medical, A Professional Corporation's NPI number?
The NPI number for Chang Medical, A Professional Corporation is 1609441070. It was assigned to this organization in the NPPES registry on May 26, 2021.
Where is Chang Medical, A Professional Corporation located?
Chang Medical, A Professional Corporation is located at 500 N Garfield Ave Ste 204, Monterey Park, CA 91754. The listed phone number is (626) 280-4393.
What is Chang Medical, A Professional Corporation's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Pulmonary Disease, with taxonomy code 207RP1001X.
Is Chang Medical, A Professional Corporation enrolled in Medicare?
Yes. Chang Medical, A Professional Corporation is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Chang Medical, A Professional Corporation?
According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Critical Care (Intensivists)) reassigns their Medicare billing to Chang Medical, A Professional Corporation. 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. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Chang Medical, A Professional Corporation was last updated on May 26, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years 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.
# Chang Medical, A Professional Corporation · NPI 1609441070
Pulmonary Disease organization in Monterey Park, California. Organization record, active in the CMS NPPES registry since May 26, 2021.
## Identity
- **NPI:** 1609441070 (Entity type: Organization)
- **Enumerated:** May 26, 2021
- **Primary specialty:** Internal Medicine - Pulmonary Disease · taxonomy 207RP1001X
- **Organization subpart:** No
- **Authorized official:** William Chang, OWNER
## Practice location
- **Address:** 500 N GARFIELD AVE STE 204, Monterey Park, CA 91754-1242
- **Phone:** (626) 280-4393 · **Fax:** (626) 280-5379
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 1 clinician (Critical Care (Intensivists)) reassigns Medicare billing to this organization (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** May 26, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1609441070) · Data from the CMS NPPES public registry.