DR. HOWARD Y. CHANG MD
NPI 1700845336
Internal Medicine in Oakland, CA
About Dr. Howard Y. Chang Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. HOWARD Y. CHANG MD (NPI 1700845336) is an individual internal medicine provider in Oakland, California, licensed in California (A100145) and active in the NPI registry since March 2006. He is enrolled in Medicare PECOS and is a graduate of Northwestern University Feinberg Medical School (1999).
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Howard Y. Chang Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Howard Chang reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Richmond, CA 94801
- Reassigned Medicare billing, California enrollment
- 20,078 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94611 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
OAKLAND, CA 94611
OAKLAND, CA 94611
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 Howard Chang's NPI number?
The NPI number for Howard Chang is 1700845336. It was assigned to this individual provider in the NPPES registry on March 22, 2006.
Where is Howard Chang located?
Howard Chang practices at 275 W Macarthur Blvd, Oakland, CA 94611. The listed phone number is (510) 752-1000.
What is Howard Chang's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Howard Chang enrolled in Medicare?
Yes. Howard Chang is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Howard Chang's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Howard Chang reassigns Medicare benefits to Permanente Medical Group Inc (Richmond, CA). The 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 Howard Chang's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Howard Chang was last updated on December 9, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Dr. Howard Y. Chang, MD · NPI 1700845336
Internal Medicine physician in Oakland, California. Individual provider, active in the CMS NPPES registry since March 22, 2006.
## Identity
- **NPI:** 1700845336 (Entity type: Individual)
- **Enumerated:** March 22, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** A100145 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 275 W MACARTHUR BLVD, Oakland, CA 94611-5641
- **Phone:** (510) 752-1000 · **Fax:** (617) 726-7491
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Permanente Medical Group Inc (NPI 1235226531, Richmond, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Northwestern University Feinberg Medical School, class of 1999
## Record status
- **NPPES last updated:** December 9, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1700845336) · Data from the CMS NPPES public registry.