DR. TANZHEN J. WU M.D.
NPI 1609835412
Anesthesiology in Los Alamitos, CA
About Dr. Tanzhen J. Wu M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. TANZHEN J. WU M.D. (NPI 1609835412) is an individual anesthesiology provider in Los Alamitos, California, licensed in California (A81203) and active in the NPI registry since March 2006. She is enrolled in Medicare PECOS and is a graduate of Other (1984).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 7
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. Tanzhen J. Wu 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
3Medicare enrollment records show Tanzhen Wu reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Fountain Valley, CA 97208
- Reassigned Medicare billing, California enrollment
- 59 clinicians in this Medicare group
Orange, CA 92869
- Reassigned Medicare billing, California enrollment
- 168 clinicians in this Medicare group
Foothill Ranch, CA 92610
- Reassigned Medicare billing, California enrollment
- 11 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 7
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.
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.
Reported Quality Measures
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.
LOS ALAMITOS, CA 90720
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 Tanzhen Wu's NPI number?
The NPI number for Tanzhen Wu is 1609835412. It was assigned to this individual provider in the NPPES registry on March 21, 2006.
Where is Tanzhen Wu located?
Tanzhen Wu practices at 3751 Katella Ave, Los Alamitos, CA 90720. The listed phone number is (562) 598-1311.
What is Tanzhen Wu's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Tanzhen Wu enrolled in Medicare?
Yes. Tanzhen Wu 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 Tanzhen Wu's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Tanzhen Wu reassigns Medicare benefits to 3 organizations: Premiercare Anesthesia Fountain Valley Inc (Fountain Valley, CA), Orange Coast Anesthesia Inc (Orange, CA) and Clarity Anesthesia Medical Group (Foothill Ranch, 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 Tanzhen Wu'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 Tanzhen Wu was last updated on August 4, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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. Tanzhen J. Wu, M.D. · NPI 1609835412
Anesthesiology physician in Los Alamitos, California. Individual provider, active in the CMS NPPES registry since March 21, 2006.
## Identity
- **NPI:** 1609835412 (Entity type: Individual)
- **Enumerated:** March 21, 2006
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** A81203 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 3751 KATELLA AVE, Los Alamitos, CA 90720-3113
- **Phone:** (562) 598-1311
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Premiercare Anesthesia Fountain Valley Inc (NPI 1831536531, Fountain Valley, CA); Orange Coast Anesthesia Inc (NPI 1508138256, Orange, CA); Clarity Anesthesia Medical Group (NPI 1922533918, Foothill Ranch, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1984
## Record status
- **NPPES last updated:** August 4, 2011
- **Other identifiers:** Medicare PIN DR550X (CA); Medicare UPIN I15864 (CA); Other 1942504501 (CA); and 4 more
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Source: [NPI Profile](https://npiprofile.com/npi/1609835412) · Data from the CMS NPPES public registry.