EMILY CHIEN
NPI 1548750474
Emergency Medicine in San Leandro, CA
About Emily Chien NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
EMILY CHIEN (NPI 1548750474) is an individual emergency medicine provider in San Leandro, California, licensed in California (197687) and active in the NPI registry since May 2018. She is enrolled in Medicare PECOS and is a graduate of University Of California, Geffen School Of Medicine (2018).
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 and accepts Medicare assignment
Emily Chien 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 Reassignments
2Medicare enrollment records show Emily Chien reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Redwood City, CA 94063
- Reassigned Medicare billing, California enrollment
- 20,078 clinicians in this Medicare group
New York, NY 10021
- Reassigned Medicare billing, New York enrollment
- 226 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 94577 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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.
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 Emily Chien's NPI number?
The NPI number for Emily Chien is 1548750474. It was assigned to this individual provider in the NPPES registry on May 16, 2018.
Where is Emily Chien located?
Emily Chien practices at 2500 Merced St, San Leandro, CA 94577. The listed phone number is (718) 245-4798.
What is Emily Chien's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Emily Chien enrolled in Medicare?
Yes. Emily Chien 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 organizations bill Medicare for Emily Chien's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Emily Chien reassigns Medicare benefits to 2 organizations: Permanente Medical Group Inc (Redwood City, CA) and Weill Medical College Of Cornell (New York, NY). 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 Emily Chien'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 Emily Chien was last updated on November 6, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 23 months 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.
# Emily Chien · NPI 1548750474
Emergency Medicine physician in San Leandro, California. Individual provider, active in the CMS NPPES registry since May 16, 2018.
## Identity
- **NPI:** 1548750474 (Entity type: Individual)
- **Enumerated:** May 16, 2018
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 197687 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 2500 MERCED ST, San Leandro, CA 94577-4201
- **Phone:** (718) 245-4798
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Permanente Medical Group Inc (NPI 1639252604, Redwood City, CA); Weill Medical College Of Cornell (NPI 1205882586, New York, NY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, Geffen School Of Medicine, class of 2018
## Record status
- **NPPES last updated:** November 6, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1548750474) · Data from the CMS NPPES public registry.