Philip Ostermann
Anesthesiology Physician · Thousand Oaks, CA
Philip Ostermann is an anesthesiology physician with a practice address in Thousand Oaks, California, and NPI 1821235623, issued on Jan 15, 2009. Check the license (California A107004, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Philip Ostermann
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- A107004 CA
Self-reported in NPPES; status is on the state search - Practice location
- 215 W Janss RD, Thousand Oaks, CA 91360
- Phone
- (805) 370-4521
- Enumerated
- Jan 15, 2009
- Record last updated
- Jun 4, 2012 (not updated in 14 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20110627000356); accepts Medicare assignment
- Medical or professional school
- Northwestern University Feinberg Medical School, 2007
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 7,571 in California → Look up another NPI →
Also registered at 215 W Janss RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sandra Abadir, MDStudent in an Organized Health Care Education/Training Program1609578152
- Danny Abdalnour, MDStudent in an Organized Health Care Education/Training Program1598613705
- Sara Abdel AzimStudent in an Organized Health Care Education/Training Program1760284384
- Ziad Abdullatif, D.O.Student in an Organized Health Care Education/Training Program1710689419
- Bianca Abramian, MDStudent in an Organized Health Care Education/Training Program1649118332
- Rehman Afraz, MDStudent in an Organized Health Care Education/Training Program1265370407
Verify Philip Ostermann in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A107004Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Conejo Los Robles Anesthesiology Medical Group IncThousand Oaks, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Philip Ostermann among 7,571 anesthesiology physician records in California
Philip Ostermann is one of 7,571 anesthesiology physician records with a practice address in California. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 61% of them.
- NPI issued2009 · 61% of these records are older, 35% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2007 · median 2006 among the 4,868 with a school on file
- Record last updated2012 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207L00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
30 anesthesiology physician records list a practice address in Thousand Oaks
They are 30 of the 2,434 NPPES records with a practice address in Thousand Oaks, and 7,571 anesthesiology physician records in California.
All 7,571 in California → Every provider in Thousand Oaks → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- Steven Bansbach, M.D.Thousand Oaks, CA 913601194734384
- Harry Cozen, M.D.Thousand Oaks, CA 913601114998846
- Michael Goldberg, M.D.Thousand Oaks, CA 913601679591788
- Ward Jones, M.D.Thousand Oaks, CA 913601467463109
- Erna Kwong, M.D.Thousand Oaks, CA 913601033145388
- Liem Lechau, M.D.Thousand Oaks, CA 913601396756052
- James Lin, M.D.Thousand Oaks, CA 913601821009580
- Stephen Maloon, M.D.Thousand Oaks, CA 913601396765566
Common questions
What is Philip Ostermann's NPI number?
Philip Ostermann's National Provider Identifier (NPI) is 1821235623, issued on Jan 15, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Philip Ostermann located?
The NPPES record lists a practice address at 215 W Janss RD, Thousand Oaks, CA, 91360. Phone: (805) 370-4521. Providers update this record themselves, so call before visiting.
How can I verify Philip Ostermann's license?
NPPES lists California license number A107004, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.