DR. MAGDALENA TESMER D.O.
NPI 1275820375
Anesthesiology in West Hills, CA
About Dr. Magdalena Tesmer D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MAGDALENA TESMER D.O. (NPI 1275820375) is an individual anesthesiology provider in West Hills, California, licensed in California (20A13516) and active in the NPI registry since July 2011. She is enrolled in Medicare PECOS, maintains a secondary practice location in Encino, and is a graduate of Other (2011).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 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. Magdalena Tesmer D.o. 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 Magdalena Tesmer reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
West Hills, CA 91307
- Reassigned Medicare billing, California enrollment
- 52 clinicians in this Medicare group
West Hills, CA 91307
- Reassigned Medicare billing, California enrollment
- Also billed through NPI 1205566544 (California), NPI 1689200305 (California), NPI 1366041469 (California)
- 52 clinicians in this Medicare group
Los Angeles, CA 90095
- Reassigned Medicare billing, California enrollment
- 295 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 6
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.
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.
WEST HILLS, CA 91307
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 Magdalena Tesmer's NPI number?
The NPI number for Magdalena Tesmer is 1275820375. It was assigned to this individual provider in the NPPES registry on July 9, 2011.
Where is Magdalena Tesmer located?
Magdalena Tesmer practices at 7300 Medical Center Dr, West Hills, CA 91307. The listed phone number is (818) 676-4000.
What is Magdalena Tesmer's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Magdalena Tesmer enrolled in Medicare?
Yes. Magdalena Tesmer 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 Magdalena Tesmer's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Magdalena Tesmer reassigns Medicare benefits to 3 organizations: West Hills Anesthesia And Perioperative Physicians (West Hills, CA), The Regents Of The University Of California (West Hills, CA) and Regents Of The University Of California (Los Angeles, 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 Magdalena Tesmer'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 Magdalena Tesmer was last updated on October 28, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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. Magdalena Tesmer, D.O. · NPI 1275820375
Anesthesiology physician in West Hills, California. Individual provider, active in the CMS NPPES registry since July 9, 2011.
## Identity
- **NPI:** 1275820375 (Entity type: Individual)
- **Enumerated:** July 9, 2011
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** 20A13516 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 7300 MEDICAL CENTER DR, West Hills, CA 91307-1902
- **Phone:** (818) 676-4000
## 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): West Hills Anesthesia And Perioperative Physicians (NPI 1881061802, West Hills, CA); The Regents Of The University Of California (NPI 1215381843, West Hills, CA); Regents Of The University Of California (NPI 1326096165, Los Angeles, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2011
## Record status
- **NPPES last updated:** October 28, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1275820375) · Data from the CMS NPPES public registry.