Dr. Michael Henry Oster, DO
- Medicare services, 2018
- 162
- Part D claims, 2017
- 77
- Hospital affiliations
- 1
- Medical group
- 1
- State licenses
- 2
- Practice address
- One Barnes-Jewish Hospital Plaza, Saint Louis, MO 63110
- Practice phone
- Call (314) 747-3000
- 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. Michael Henry Oster is an emergency medicine physician in Saint Louis, Missouri
Dr. Oster practices at Barnes-Jewish Hospital in Saint Louis, Missouri, part of BJC Health.
Dr. Oster's NPI, 1356333991, was assigned on August 19, 2005. Dr. Oster graduated from Midwestern University, Chicago College of Osteopathic Med in 1978.
- NPI
- 1356333991NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8820045834
- NPI enumeration date
- August 19, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (314) 747-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 74
- Medical school graduation
- 1978
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Michael Henry Oster practices at 2 locations in Saint Louis, Missouri
Dr. Oster's primary practice is Barnes-Jewish Hospital, at One Barnes-Jewish Hospital Plaza, Saint Louis, MO 63110 in St. Louis City. The practice phone is (314) 747-3000. Dr. Oster also practices at Barnes-Jewish Hospital, 1 Barnes Jewish Hospital Plz, Saint Louis, MO 63110.
- Barnes-Jewish HospitalPrimaryOne Barnes-Jewish Hospital Plaza, Saint Louis, MO 63110 · St. Louis CityPhone(314) 747-3000
- Barnes-Jewish Hospital1 Barnes Jewish Hospital Plz, Saint Louis, MO 63110 · Saint Louis CityPhone(314) 362-5000
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; and Dmand AI Practice Data
Dr. Michael Henry Oster is affiliated with 2 sites of care and 1 medical group
Dr. Oster's primary practice is Barnes-Jewish Hospital in Saint Louis, Missouri, part of BJC Health. The medical group on file is ASAP, Madison. Dmand AI also links Dr. Oster to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Michael Henry 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 |
|---|---|
| Barnes-Jewish Hospital | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Michael Henry Oster is one of 1,063 emergency medicine physicians in Missouri
Emergency medicine is Dr. Oster's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dmand AI has Dr. Oster's licenses on file in 2 states: Illinois and Wisconsin.
Specialties and state licenses
- Emergency medicine, Illinois
- Wisconsin license
Emergency medicine physicians near Dr. Oster
Counts of emergency medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Michael Henry Oster billed Medicare for 162 services in 2018
CMS data shows 162 Medicare services from Dr. Oster across 5 procedure codes in 2018. Medicare paid $15,792 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Oster's Medicare services by type, 2017 to 2018
- 2017
- 2018
- Office and hospital visits
- 2017: 3552018: 16254%
Dr. Oster compared with the Missouri median for emergency medicine physicians, 2018
- Dr. Oster
- Missouri median
- Medicare services
- 162vs 25236% below
- Part D claims
- 77vs 6912% above
Medians across 1,092 emergency medicine physicians in Missouri with Dmand AI profiles that report each measure.
Dr. Oster's most billed Medicare procedure codes, 2018
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Oster and other emergency medicine physicians in Missouri.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Michael Henry Oster's patients have a median age of 43
Across all payers, Dmand AI patient panel data puts Dr. Oster's median patient age at 43, with 48% 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 43
Patient panel by sex, all payers
- Women48%
- Men52%
Source: Dmand AI Patient Panel Data
Dr. Michael Henry Oster wrote 77 Medicare Part D claims in 2017
In 2017, Dr. Oster wrote 77 Medicare Part D claims. They cover 3 drugs, with $374 in total drug cost. In 2016, CMS named 65 claims across 4 drugs.
Dr. Oster's most prescribed drugs by claims, 2017
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, 2016 to 2017
- 2016
- 2017
- Claims for drugs CMS names
- 2016: 652017: 7718%
Drugs named by CMS: 3 in 2017, 4 in 2016.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
How Dr. Michael Henry Oster takes part in Medicare
Dr. Oster accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Michael Henry Oster graduated from Midwestern University, Chicago College of Osteopathic Med
Dr. Oster graduated from Midwestern University, Chicago College of Osteopathic Med in 1978.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Michael Henry 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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Affiliation DataDmand AI Practice 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile 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. Michael Henry 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. Michael Henry Oster's NPI number?
Dr. Michael Henry Oster's NPI number is 1356333991. It was assigned on August 19, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Michael Henry Oster?
Dr. Michael Henry Oster is an emergency medicine physician in Saint Louis, Missouri. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Michael Henry Oster practice?
Dr. Oster practices at One Barnes-Jewish Hospital Plaza, Saint Louis, MO 63110. Dr. Oster also practices at 1 Barnes Jewish Hospital Plz, Saint Louis, MO 63110. Dr. Oster's primary practice is Barnes-Jewish Hospital in Saint Louis, Missouri, part of BJC Health. Dmand AI also links Dr. Oster to 1 group practice or clinic.
What is Dr. Michael Henry Oster's office phone number?
The practice phone on file for Dr. Oster is (314) 747-3000.
Which states has Dr. Michael Henry Oster been licensed in?
Dmand AI has state licenses on file for Dr. Oster in Illinois and Wisconsin.
Which hospitals is Dr. Michael Henry Oster affiliated with?
Dr. Oster practices at Barnes-Jewish Hospital in Saint Louis, Missouri.
What medical group is Dr. Michael Henry Oster part of?
Dr. Oster is linked to ASAP, Madison.
Does Dr. Michael Henry Oster accept Medicare?
Yes. CMS data shows Dr. Oster billed Medicare for 162 services in 2018, and Dr. Oster accepts Medicare assignment.
What services does Dr. Michael Henry Oster bill to Medicare?
In 2018, Dr. Oster's most billed Medicare services were emergency department visit (99284), emergency department visit (99285) and emergency department visit (99282).
Where did Dr. Michael Henry Oster go to medical school?
Dr. Oster graduated from Midwestern University, Chicago College of Osteopathic Med in 1978.
What drugs does Dr. Michael Henry Oster prescribe most?
In 2017 Medicare Part D data, Dr. Oster's most prescribed drugs by claims were Prednisone, Amoxicillin-Clavulanate Potass and Hydrocodone-Acetaminophen.
How long has Dr. Michael Henry Oster been practicing?
Dr. Oster graduated from medical school in 1978, 48 years ago.
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