DR. JOHNNY TZER-REN CHANG MD
NPI 1417175258
Plastic Surgery in Palo Alto, CA
About Dr. Johnny Tzer-ren Chang Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOHNNY TZER-REN CHANG MD (NPI 1417175258) is an individual plastic surgery provider in Palo Alto, California, licensed in California (A121316) and active in the NPI registry since April 2007. He is enrolled in Medicare PECOS and is a graduate of Tufts University School Of Medicine (2006).
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. Johnny Tzer-ren 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 Johnny Chang reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Palo Alto, CA 94301
- Reassigned Medicare billing, California enrollment
- Also billed through NPI 1104067115 (California), NPI 1982845186 (California)
- 4,479 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.
Areas of Expertise CMS Part B claims 2
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94301 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.
PALO ALTO, CA 94301
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 Johnny Chang's NPI number?
The NPI number for Johnny Chang is 1417175258. It was assigned to this individual provider in the NPPES registry on April 24, 2007.
Where is Johnny Chang located?
Johnny Chang practices at 795 El Camino Real Lee Building, Level 3, Palo Alto, CA 94301. The listed phone number is (650) 853-2916.
What is Johnny Chang's specialty?
The primary specialty registered for this NPI is Plastic Surgery with taxonomy code 208200000X.
Is Johnny Chang enrolled in Medicare?
Yes. Johnny 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 Johnny Chang's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Johnny Chang reassigns Medicare benefits to Sutter Bay Medical Foundation (Palo Alto, 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 Johnny 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 Johnny Chang was last updated on May 28, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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. Johnny Tzer-Ren Chang, MD · NPI 1417175258
Plastic Surgery physician in Palo Alto, California. Individual provider, active in the CMS NPPES registry since April 24, 2007.
## Identity
- **NPI:** 1417175258 (Entity type: Individual)
- **Enumerated:** April 24, 2007
- **Primary specialty:** Plastic Surgery · taxonomy 208200000X
- **State license:** A121316 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 795 EL CAMINO REAL, LEE BUILDING, LEVEL 3, Palo Alto, CA 94301-2302
- **Phone:** (650) 853-2916 · **Fax:** (650) 853-2852
## 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:** Sutter Bay Medical Foundation (NPI 1013950807, Palo Alto, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Tufts University School Of Medicine, class of 2006
## Record status
- **NPPES last updated:** May 28, 2020
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Source: [NPI Profile](https://npiprofile.com/npi/1417175258) · Data from the CMS NPPES public registry.