Henry Arthur Oster, M.D.
Infectious Disease Physician · Ventura, CA
Henry Arthur Oster, M.D. is an infectious disease physician with a practice address in Ventura, California, and NPI 1417992223, issued on Jun 17, 2006. Check the license (California G33690, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Henry Arthur Oster
- Credential
- M.D.
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License number
- G33690 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2721 E Main St, Ventura, CA 93003
- Phone
- (805) 656-6272
- Enumerated
- Jun 17, 2006
- Record last updated
- May 1, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (805) 656-3863
- Medicaid ID
- 00G336900 CA
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 1,119 in California → Look up another NPI →
Also registered at 2721 E Main St
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- Kayvahn Steck-Bayat, MDObstetrics & Gynecology Physician1649512864
- Brian Utz, D.O.Family Medicine Physician1427434570
Verify Henry Arthur Oster in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G33690Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Henry Arthur Oster among 1,119 infectious disease physician records in California
Henry Arthur Oster, M.D. is one of 1,119 infectious disease physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 4% of them.
- NPI issued2006 · 4% of these records are older, 54% newer
- In a Medicare fileNo · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 66% of these records are
- Record last updated2017 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0200X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in California
There are 1,119 infectious disease physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 1,119 in California → Every provider in Ventura → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Melissa Barger, M.D.Ventura, CA 930031598020968
- Riffat Muzaffer, M.DVentura, CA 930031093999294
- Cary Savitch, MDVentura, CA 930031518971084
- Omega Edwards, M.D.Camarillo, CA 930101073730511
- Joshua Wolfsohn, D.O.Camarillo, CA 930101205098456
- Byungwoo Choi, M.D.Camarillo, CA 930121295006948
- Malini Soogoor, M.D.,Simi Valley, CA 930651659328185
- David Fisk, MDSanta Barbara, CA 931051821049297
Common questions
What is Henry Arthur Oster, M.D.'s NPI number?
Henry Arthur Oster, M.D.'s National Provider Identifier (NPI) is 1417992223, issued on Jun 17, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Henry Arthur Oster, M.D. located?
The NPPES record lists a practice address at 2721 E Main St, Ventura, CA, 93003. Phone: (805) 656-6272. Providers update this record themselves, so call before visiting.
How can I verify Henry Arthur Oster, M.D.'s license?
NPPES lists California license number G33690, 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. 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.