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Dr. Henry Arthur Oster, MD
NPI1417992223
- Medicare services, 2023
- 277
- Part D claims, 2022
- 49
- Publications
- 2
- Hospital affiliations
- 1
- Industry payments
- $1,899
- Practice address
- 147 North Brent Street, Ventura, CA 93003
- Practice phone
- Call (805) 652-5011
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Oster's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Henry Arthur Oster is an infectious disease specialist in Ventura, California
Dr. Oster practices at Community Memorial Hospital - Ventura in Ventura, California, part of Community Memorial Healthcare.
Dr. Oster's NPI, 1417992223, was assigned on June 17, 2006. Dr. Oster graduated from Harvard Medical School in 1971. Dr. Oster's California license number on file is G33690.
NPI and contact details
- NPI
- 1417992223NPI Registry (opens in a new tab)
- NPI enumeration date
- June 17, 2006
- NPI status
- Active
- Practice phone
- (805) 652-5011
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 81
- Medical school graduation
- 1971
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Henry Arthur Oster practices at Community Memorial Hospital - Ventura in Ventura, California
Dr. Oster's primary practice is Community Memorial Hospital - Ventura, at 147 North Brent Street, Ventura, CA 93003 in Ventura County. The practice phone is (805) 652-5011.
- Community Memorial Hospital - Ventura147 North Brent Street, Ventura, CA 93003 · Ventura CountyPhone(805) 652-5011
Source: Dmand AI Affiliation Data
Dr. Henry Arthur Oster is affiliated with 2 sites of care and 1 medical group
Dr. Oster's primary practice is Community Memorial Hospital - Ventura in Ventura, California, part of Community Memorial Healthcare. The medical group on file is Community Memorial Healthcare. Dmand AI also links Dr. Oster to 1 more physician office, named with a free account. Dr. Oster's employer is on file too: a hospital.
Community Memorial Healthcare1 physician officeName with a free accountEmployer: hospitalName with a free account
See all 3 affiliations for Dr. OsterSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Henry Arthur Oster's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Oster practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Community Memorial Hospital - Ventura | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Henry Arthur Oster is one of 1,054 infectious disease specialists in California
Infectious disease is Dr. Oster's primary specialty in the NPI Registry, under taxonomy code 207RI0200X. Dr. Oster is board certified in infectious disease by the American Board of Internal Medicine. Dmand AI has Dr. Oster's licenses on file in 2 states: California and Florida.
Specialties and state licenses
- Infectious disease, CaliforniaPrimary
- Florida license
Infectious disease specialists near Dr. Oster
Counts of infectious disease specialists with a Dmand AI profile, by place and practice. Each opens the list.
1,054infectious disease specialists in California
4infectious disease specialists in Ventura
2infectious disease specialists at Community Memorial Hospital - VenturaSources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Henry Arthur Oster billed Medicare for 277 services in 2023
CMS data shows 277 Medicare services from Dr. Oster across 3 procedure codes in 2023. Medicare paid $27,712 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 2023277
Paid by Medicare$27,712
Procedure codes3
Dr. Oster's Medicare services by type, 2022 to 2023
- 2022
- 2023
- Office and hospital visits
- 2022: 7772023: 27764%
- Other services
- 2022: 522023: 0100%
Dr. Oster compared with the California median for infectious disease specialists, 2023
- Dr. Oster
- California median
- Medicare services
- 277vs 42935% below
- Part D claims
- 49vs 11959% below
Medians across 930 infectious disease specialists in California with Dmand AI profiles that report each measure.
Dr. Oster's most billed Medicare procedure codes, 2023
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Oster?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Oster and other infectious disease specialists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Henry Arthur Oster's patients have a median age of 56
Across all payers, Dmand AI patient panel data puts Dr. Oster's median patient age at 56, with 33% women.
Dr. Oster's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 56
Patient panel by sex, all payers
- Women33%
- Men67%
Source: Dmand AI Patient Panel Data
Dr. Henry Arthur Oster wrote 49 Medicare Part D claims in 2022
In 2022, Dr. Oster wrote 49 Medicare Part D claims. Every claim was for a generic drug. They cover 4 drugs, with $3,395 in total drug cost. In 2021, CMS named 127 claims across 5 drugs.
Part D claims, 202249
Drugs named by CMS4
Total drug cost$3,395
Dr. Oster's most prescribed drugs by claims, 2022
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2021 to 2022
- 2021
- 2022
- Claims for drugs CMS names
- 2021: 1272022: 4961%
Drugs named by CMS: 4 in 2022, 5 in 2021.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Henry Arthur Oster has 2 publications on record
Dmand AI links 2 papers to Dr. Oster.
Papers2
Recent publications by Dr. Oster
See who Dr. Oster researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Oster works with, so you can find a warm path to the right infectious disease specialists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Henry Arthur Oster received $1,899 in industry payments from 2016 to 2022
CMS Open Payments shows 26 general payments to Dr. Oster from 15 drug and device companies from 2016 to 2022. Food and beverage make up the largest share, 99% of the total. Allergan Inc. paid the most, $448.
General payments to Dr. Oster by program year, 2016 to 2022
General payments to Dr. Oster by kind, 2016 to 2022
$1.9Kin total
- Food and beverage$1,87499%
- Education$251%
Companies that paid Dr. Oster the most, 2016 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Henry Arthur Oster has 1 award and honors on record
Dmand AI lists 1 award for Dr. Oster. Dr. Oster serves on Infection Control/P&T Committee.
Awards and honors for Dr. Oster
- Undated
- Fellow
Dr. Oster's committees and leadership roles
- Infection Control/P&T CommitteeChair
- 2010 to present
Source: Dmand AI Professional Profile Data
Dr. Henry Arthur Oster graduated from Harvard Medical School
Dr. Oster graduated from Harvard Medical School in 1971.
- Medical school
- Board certified in infectious disease
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Henry Arthur Oster accepts plans from 5 insurance carriers
Dr. Oster is in network with 5 carriers, including Elevance, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 5. Check the plan with the practice before a visit.
- Elevance
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
Plan types Dr. Oster accepts, by number of carriers
- Medicare5
- PPO5
- HMO2
- POS2
- EPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. Henry Arthur Oster's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Henry Arthur Oster
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Henry Arthur Oster's NPI number?
Dr. Henry Arthur Oster's NPI number is 1417992223. It was assigned on June 17, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Henry Arthur Oster?
Dr. Henry Arthur Oster is an infectious disease specialist in Ventura, California. The primary specialty in the NPI Registry is Infectious Disease Physician (taxonomy code 207RI0200X).
Where does Dr. Henry Arthur Oster practice?
Dr. Oster practices at 147 North Brent Street, Ventura, CA 93003. Dr. Oster's primary practice is Community Memorial Hospital - Ventura in Ventura, California, part of Community Memorial Healthcare. Dmand AI also links Dr. Oster to 1 physician office.
What is Dr. Henry Arthur Oster's office phone number?
The practice phone on file for Dr. Oster is (805) 652-5011.
What is Dr. Henry Arthur Oster's medical license number?
Dr. Oster's California license number on file is G33690, one of the licenses on file in 2 states.
Which states has Dr. Henry Arthur Oster been licensed in?
Dmand AI has state licenses on file for Dr. Oster in California (1977 to 2024) and Florida (since 1973).
Which hospitals is Dr. Henry Arthur Oster affiliated with?
Dr. Oster practices at Community Memorial Hospital - Ventura in Ventura, California.
What medical group is Dr. Henry Arthur Oster part of?
Dr. Oster is linked to Community Memorial Healthcare.
Does Dr. Henry Arthur Oster accept Medicare?
Yes. CMS data shows Dr. Oster billed Medicare for 277 services in 2023.
Is Dr. Henry Arthur Oster board certified?
Yes. Dr. Oster is board certified in infectious disease by the American Board of Internal Medicine.
Show 7 more questionsShow fewer questions
What services does Dr. Henry Arthur Oster bill to Medicare?
In 2023, Dr. Oster's most billed Medicare services were hospital inpatient care (99233), hospital inpatient care (99223) and hospital inpatient care (99232).
Where did Dr. Henry Arthur Oster go to medical school?
Dr. Oster graduated from Harvard Medical School in 1971.
What drugs does Dr. Henry Arthur Oster prescribe most?
In 2022 Medicare Part D data, Dr. Oster's most prescribed drugs by claims were Doxycycline Hyclate, Methenamine Hippurate and Cefazolin Sodium.
Has Dr. Henry Arthur Oster received payments from drug or device companies?
CMS Open Payments shows $1,899 in general payments to Dr. Oster from 15 companies from 2016 to 2022. The largest total came from Allergan Inc.
How long has Dr. Henry Arthur Oster been practicing?
Dr. Oster graduated from medical school in 1971, 55 years ago.
Does Dr. Henry Arthur Oster do research?
Dmand AI links 2 publications to Dr. Oster.
What insurance does Dr. Henry Arthur Oster accept?
Dr. Oster is in network with 5 carriers, including Elevance, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 5. Check the plan with the practice before a visit.
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