DR. SHARON Y. CHIEN M.D.
NPI 1316955420
Internal Medicine in San Diego, CA
About Dr. Sharon Y. Chien M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. SHARON Y. CHIEN M.D. (NPI 1316955420) is an individual internal medicine provider in San Diego, California, licensed in California (A85899) and active in the NPI registry since August 2006. She is enrolled in Medicare PECOS and is a graduate of University Of California, Davis School Of Medicine (2002).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
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. Sharon Y. Chien M.d. 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
4Medicare enrollment records show Sharon Chien reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Diego, CA 92123
- Reassigned Medicare billing, California enrollment
- 1,437 clinicians in this Medicare group
San Diego, CA 92108
- Reassigned Medicare billing, California enrollment
- 13,921 clinicians in this Medicare group
San Diego, CA 92111
- Reassigned Medicare billing, California enrollment
- 1,233 clinicians in this Medicare group
La Jolla, CA 92037
- Reassigned Medicare billing, California enrollment
- 44 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 4
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 92123 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.
SAN DIEGO, CA 92123
SAN DIEGO, CA 92123
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 Sharon Chien's NPI number?
The NPI number for Sharon Chien is 1316955420. It was assigned to this individual provider in the NPPES registry on August 4, 2006.
Where is Sharon Chien located?
Sharon Chien practices at 2929 Health Center Dr, San Diego, CA 92123. The listed phone number is (858) 499-2777.
What is Sharon Chien's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Sharon Chien enrolled in Medicare?
Yes. Sharon 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 Sharon Chien's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Sharon Chien reassigns Medicare benefits to 4 organizations: Emergency And Acute Care Medical Corporation (San Diego, CA), Southern California Permanente Medical Group (San Diego, CA), Sharp Rees-Stealy Medical Group, Inc (San Diego, CA) and Ximed Hospitalists, Inc. (La Jolla, 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 Sharon 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 Sharon Chien was last updated on May 27, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.
# Dr. Sharon Y. Chien, M.D. · NPI 1316955420
Internal Medicine physician in San Diego, California. Individual provider, active in the CMS NPPES registry since August 4, 2006.
## Identity
- **NPI:** 1316955420 (Entity type: Individual)
- **Enumerated:** August 4, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** A85899 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 2929 HEALTH CENTER DR, San Diego, CA 92123-2762
- **Phone:** (858) 499-2777
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): Emergency And Acute Care Medical Corporation (NPI 1437103942, San Diego, CA); Southern California Permanente Medical Group (NPI 1023425972, San Diego, CA); Sharp Rees-Stealy Medical Group, Inc (NPI 1285616177, San Diego, CA); Ximed Hospitalists, Inc. (NPI 1831124791, La Jolla, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, Davis School Of Medicine, class of 2002
## Record status
- **NPPES last updated:** May 27, 2025
- **Other identifiers:** Medicaid 00A858990 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1316955420) · Data from the CMS NPPES public registry.