RUTH HSIAO MD
NPI 1174942882
Hospitalist in San Diego, CA
About Ruth Hsiao Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
RUTH HSIAO MD (NPI 1174942882) is an individual hospitalist provider in San Diego, California, licensed in California (A137828) and active in the NPI registry since April 2014. She is enrolled in Medicare PECOS and is a graduate of University Of Illinois College Of Med (chi/peor/rock/chm-urb) (2014).
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
Ruth Hsiao 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 Reassignments
2Medicare enrollment records show Ruth Hsiao reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Diego, CA 92103
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: Regents Of The University Of California
- 1,051 clinicians in this Medicare group
San Diego, CA 92108
- Reassigned Medicare billing, California enrollment
- 5,228 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 92103 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.
SAN DIEGO, CA 92103
SAN DIEGO, CA 92103
SAN DIEGO, CA 92103
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 Ruth Hsiao's NPI number?
The NPI number for Ruth Hsiao is 1174942882. It was assigned to this individual provider in the NPPES registry on April 9, 2014.
Where is Ruth Hsiao located?
Ruth Hsiao practices at 200 W Arbor Dr, San Diego, CA 92103. The listed phone number is (619) 471-9186.
What is Ruth Hsiao's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Ruth Hsiao enrolled in Medicare?
Yes. Ruth Hsiao 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 Ruth Hsiao's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ruth Hsiao reassigns Medicare benefits to 2 organizations: Regents Of The University Of California - Ucsd Medical Group (San Diego, CA) and Southern California Permanente Medical Group (San Diego, 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 Ruth Hsiao'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 Ruth Hsiao was last updated on December 8, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Ruth Hsiao, MD · NPI 1174942882
Hospitalist physician in San Diego, California. Individual provider, active in the CMS NPPES registry since April 9, 2014.
## Identity
- **NPI:** 1174942882 (Entity type: Individual)
- **Enumerated:** April 9, 2014
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** A137828 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 200 W ARBOR DR, San Diego, CA 92103-9000
- **Phone:** (619) 471-9186
## 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): Regents Of The University Of California - Ucsd Medical Group (NPI 1336267137, San Diego, CA); Southern California Permanente Medical Group (NPI 1023425972, San Diego, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Illinois College Of Med, class of 2014
## Record status
- **NPPES last updated:** December 8, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1174942882) · Data from the CMS NPPES public registry.