DR. CHRISTOPHER K. CHYU M.D.
NPI 1639306020
Pediatrics - Pediatric Cardiology in San Francisco, CA
About Dr. Christopher K. Chyu M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. CHRISTOPHER K. CHYU M.D. (NPI 1639306020) is an individual pediatric cardiology provider in San Francisco, California, licensed in California (115571) and active in the NPI registry since June 2009. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Christopher K. Chyu M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
5Medicare enrollment records show Christopher Chyu reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 1,159 clinicians in this Medicare group
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 5,645 clinicians in this Medicare group
San Francisco, CA 94122
- Reassigned Medicare billing, California enrollment
- 5,544 clinicians in this Medicare group
Palo Alto, CA 94304
- Reassigned Medicare billing, California enrollment
- 3,617 clinicians in this Medicare group
Lancaster, CA 93535
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: County Of Los Angeles
- 1,939 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.
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.
SAN FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
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 Christopher Chyu's NPI number?
The NPI number for Christopher Chyu is 1639306020. It was assigned to this individual provider in the NPPES registry on June 12, 2009.
Where is Christopher Chyu located?
Christopher Chyu practices at 550 16th St, San Francisco, CA 94143. The listed phone number is (415) 353-4141.
What is Christopher Chyu's specialty?
The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Cardiology, with taxonomy code 2080P0202X.
Is Christopher Chyu enrolled in Medicare?
Yes. Christopher Chyu is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Christopher Chyu's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Christopher Chyu reassigns Medicare benefits to 5 organizations: Ucsf Pediatrics Associates (San Francisco, CA), University Of California San Francisco (San Francisco, CA), Ucsf Medical Group Business Services (San Francisco, CA), Lpch Medical Group Div Of Lucile (Palo Alto, CA) and County Of Los Angeles Auditor Controller (Lancaster, CA). Each 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 Christopher Chyu'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 Christopher Chyu was last updated on September 27, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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. Christopher K. Chyu, M.D. · NPI 1639306020
Pediatric Cardiology physician in San Francisco, California. Individual provider, active in the CMS NPPES registry since June 12, 2009.
## Identity
- **NPI:** 1639306020 (Entity type: Individual)
- **Enumerated:** June 12, 2009
- **Primary specialty:** Pediatrics - Pediatric Cardiology · taxonomy 2080P0202X
- **State license:** 115571 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 550 16TH ST, San Francisco, CA 94143-2549
- **Phone:** (415) 353-4141
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 5 organizations under Medicare reassignment (form CMS-855R): Ucsf Pediatrics Associates (NPI 1376614016, San Francisco, CA); University Of California San Francisco (NPI 1346329380, San Francisco, CA); Ucsf Medical Group Business Services (NPI 1477624104, San Francisco, CA); Lpch Medical Group Div Of Lucile (NPI 1417907940, Palo Alto, CA); County Of Los Angeles Auditor Controller (NPI 1366453045, Lancaster, CA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** September 27, 2016
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Source: [NPI Profile](https://npiprofile.com/npi/1639306020) · Data from the CMS NPPES public registry.