DR. LAWRENCE CHANG MD
NPI 1619471893
Pediatrics - Pediatric Emergency Medicine in San Francisco, CA
About Dr. Lawrence Chang Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. LAWRENCE CHANG MD (NPI 1619471893) is an individual pediatric emergency medicine provider in San Francisco, California, licensed in California (A196458) and active in the NPI registry since March 2018. 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. Lawrence Chang Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
5Medicare enrollment records show Lawrence Chang 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 94107
- Reassigned Medicare billing, California enrollment
- 1,573 clinicians in this Medicare group
San Francisco, CA 94110
- Reassigned Medicare billing, California enrollment
- 842 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
Boston, MA 02115
- Reassigned Medicare billing, Massachusetts enrollment
- 1,358 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 94158
SAN FRANCISCO, CA 94158
SAN FRANCISCO, CA 94158
SAN FRANCISCO, CA 94158
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 Lawrence Chang's NPI number?
The NPI number for Lawrence Chang is 1619471893. It was assigned to this individual provider in the NPPES registry on March 21, 2018.
Where is Lawrence Chang located?
Lawrence Chang practices at 550 16th St Box 0649, San Francisco, CA 94158. The listed phone number is (415) 613-3901.
What is Lawrence Chang's specialty?
The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Emergency Medicine, with taxonomy code 2080P0204X.
Is Lawrence Chang enrolled in Medicare?
Yes. Lawrence Chang is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Lawrence Chang's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Lawrence Chang reassigns Medicare benefits to 5 organizations: City & County Of San Francisco (San Francisco, CA), University Of California Sfgh Medical Group (San Francisco, CA), University Of California San Francisco (San Francisco, CA), Ucsf Medical Group Business Services (San Francisco, CA) and Children's Hospital Pediatric Associates, Inc (Boston, MA). 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 Lawrence 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 Lawrence Chang was last updated on September 25, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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. Lawrence Chang, MD · NPI 1619471893
Pediatric Emergency Medicine physician in San Francisco, California. Individual provider, active in the CMS NPPES registry since March 21, 2018.
## Identity
- **NPI:** 1619471893 (Entity type: Individual)
- **Enumerated:** March 21, 2018
- **Primary specialty:** Pediatrics - Pediatric Emergency Medicine · taxonomy 2080P0204X
- **State license:** A196458 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 550 16TH ST, BOX 0649, San Francisco, CA 94158-2545
- **Phone:** (415) 613-3901
## 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): City & County Of San Francisco (NPI 1013879139, San Francisco, CA); University Of California Sfgh Medical Group (NPI 1174598296, San Francisco, CA); University Of California San Francisco (NPI 1346329380, San Francisco, CA); Ucsf Medical Group Business Services (NPI 1477624104, San Francisco, CA); Children's Hospital Pediatric Associates, Inc (NPI 1457306664, Boston, MA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** September 25, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1619471893) · Data from the CMS NPPES public registry.