Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Philip Ostermann

Individual provider Anesthesiology Physician · NPI 1821235623

Philip Ostermann practises Anesthesiology in Thousand Oaks, California. Graduated from Northwestern University Feinberg Medical School in 2007, 19 years ago. Practices with Conejo Los Robles Anesthesiology Medical Group Inc, a 28-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
19
Trained at
Northwestern University Feinberg Medical School
Licensed in
CA
In the registry since
2009
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Practice location Address checks out

215 W Janss Rd Surgery Dept
Thousand Oaks, CA 91360-1847 Not confirmed with CMS for 14 years — call before visiting
Phone: (805) 370-4521
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence A107004 (CA)

Record details

NPI number1821235623
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedJanuary 15, 2009
Last updated in NPPESJune 4, 2012

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyANESTHESIOLOGY
Medical schoolNORTHWESTERN UNIVERSITY FEINBERG MEDICAL SCHOOL
Graduated 2007 (19 years in practice)
Group practice Conejo Los Robles Anesthesiology Medical Group Inc — 28 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients231
Services billed 286 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Conejo Los Robles Anesthesiology Medical Group Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 28 clinicians in the practice; 12 are shown here.

Other providers in Thousand Oaks