DR. YUNZHU NONA MEI M.D.
NPI 1821114182
Internal Medicine - Critical Care Medicine in San Francisco, CA
About Dr. Yunzhu Nona Mei M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. YUNZHU NONA MEI M.D. (NPI 1821114182) is an individual critical care medicine provider in San Francisco, California, licensed in California (115793) and active in the NPI registry since March 2007. She is enrolled in Medicare PECOS and is a graduate of University Of Wisconsin School Of Medicine (2007).
NPPES Registry Identity
Specialties & Licenses 5
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. Yunzhu Nona Mei 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
2Medicare enrollment records show Yunzhu Mei reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Apple Valley, CA 92307
- Reassigned Medicare billing, California enrollment
- 914 clinicians in this Medicare group
San Bernardino, CA 92404
- Reassigned Medicare billing, California enrollment
- 1,216 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 94109 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 FRANCISCO, CA 94109
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 Yunzhu Mei's NPI number?
The NPI number for Yunzhu Mei is 1821114182. It was assigned to this individual provider in the NPPES registry on March 21, 2007.
Where is Yunzhu Mei located?
Yunzhu Mei practices at 900 Hyde St, San Francisco, CA 94109. The listed phone number is (415) 353-6000.
What is Yunzhu Mei's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Critical Care Medicine, with taxonomy code 207RC0200X.
Is Yunzhu Mei enrolled in Medicare?
Yes. Yunzhu Mei 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 Yunzhu Mei's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Yunzhu Mei reassigns Medicare benefits to 2 organizations: Hospitalist Medicine Physicians Of California, Inc (Apple Valley, CA) and Inpatient Specialists Of California, PC (San Bernardino, 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 Yunzhu Mei'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 Yunzhu Mei was last updated on July 17, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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. Yunzhu Nona Mei, M.D. · NPI 1821114182
Critical Care Medicine physician in San Francisco, California. Individual provider, active in the CMS NPPES registry since March 21, 2007.
## Identity
- **NPI:** 1821114182 (Entity type: Individual)
- **Enumerated:** March 21, 2007
- **Primary specialty:** Internal Medicine - Critical Care Medicine · taxonomy 207RC0200X
- **State license:** 115793 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 900 HYDE ST, San Francisco, CA 94109-4806
- **Phone:** (415) 353-6000
## 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): Hospitalist Medicine Physicians Of California, Inc (NPI 1184663965, Apple Valley, CA); Inpatient Specialists Of California, PC (NPI 1952792475, San Bernardino, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Wisconsin School Of Medicine, class of 2007
## Record status
- **NPPES last updated:** July 17, 2015
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Source: [NPI Profile](https://npiprofile.com/npi/1821114182) · Data from the CMS NPPES public registry.