Dr. Michael Thomas Oliver, MD
- Medicare services, 2021
- 52
- Part D claims, 2021
- 229
- Industry payments
- $967
- Affiliated sites
- 1
- Medical group
- 1
- Practice address
- 420 W Rowland St, Covina, CA 91723-2943
- Practice phone
- Call (626) 331-6411
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Magan Medical Clinic
Multi-specialty group site · Covina, California
Find Dr. Oliver'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 Thomas Oliver is a gastroenterologist in Covina, California
Dr. Oliver practices at Magan Medical Clinic in Covina, California.
Dr. Oliver's NPI, 1487613014, was assigned on March 22, 2006. Dr. Oliver holds California license G45521.
- NPI
- 1487613014NPI Registry (opens in a new tab)
- NPI enumeration date
- March 22, 2006
- NPI status
- Active
- Practice phone
- (626) 331-6411
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Michael Thomas Oliver practices at Magan Medical Clinic in Covina, California
Dr. Oliver's primary practice is Magan Medical Clinic, at 420 W Rowland St, Covina, CA 91723-2943. The practice phone is (626) 331-6411.
- Magan Medical Clinic420 W Rowland St, Covina, CA 91723-2943Phone(626) 331-6411
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Michael Thomas Oliver is affiliated with 1 site of care and 1 medical group
Dr. Oliver's primary practice is Magan Medical Clinic in Covina, California. Dmand AI also links Dr. Oliver to 1 medical group, named with a free account.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. Michael Thomas Oliver's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Oliver practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Magan Medical Clinic | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Michael Thomas Oliver is one of 1,977 gastroenterologists in California
Gastroenterology is Dr. Oliver's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Oliver is licensed in California.
Specialties and state licenses
- Gastroenterology, CaliforniaPrimary
Gastroenterologists near Dr. Oliver
Counts of gastroenterologists 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 Thomas Oliver billed Medicare for 52 services in 2021
CMS data shows 52 Medicare services from Dr. Oliver across 3 procedure codes in 2021. Medicare paid $3,360 for them.
Dr. Oliver's Medicare services by type, 2020 to 2021
- 2020
- 2021
- Office and hospital visits
- 2020: 742021: 4046%
- Surgery
- 2020: 172021: 1229%
Where Dr. Oliver's Medicare services took place, 2021
- In an office4077%
- In a facility1223%
Dr. Oliver compared with the California median for gastroenterologists, 2021
- Dr. Oliver
- California median
- Medicare services
- 52vs 58691% below
- Part D claims
- 229vs 38040% below
Medians across 1,875 gastroenterologists in California with Dmand AI profiles that report each measure.
Dr. Oliver's most billed Medicare procedure codes, 2021
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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Michael Thomas Oliver's patients have a median age of 61
Across all payers, Dmand AI patient panel data puts Dr. Oliver's median patient age at 61, with 14% women.
Dr. Oliver's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 61
Patient panel by sex, all payers
- Women14%
- Men86%
Source: Dmand AI Patient Panel Data
Dr. Michael Thomas Oliver wrote 229 Medicare Part D claims in 2021
In 2021, Dr. Oliver wrote 229 Medicare Part D claims. Every claim was for a generic drug. They cover 5 drugs, with $29,743 in total drug cost. In 2020, CMS named 312 claims across 6 drugs.
Dr. Oliver's most prescribed drugs by claims, 2021
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, 2020 to 2021
- 2020
- 2021
- Claims for drugs CMS names
- 2020: 3122021: 22927%
Drugs named by CMS: 5 in 2021, 6 in 2020.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Michael Thomas Oliver received $967 in industry payments from 2016 to 2023
CMS Open Payments shows 44 general payments to Dr. Oliver from 18 drug and device companies from 2016 to 2023. Food and beverage make up the largest share, 98% of the total. Abbott Laboratories paid the most, $254.
General payments to Dr. Oliver by program year, 2016 to 2023
General payments to Dr. Oliver by kind, 2016 to 2023
- Food and beverage$94798%
- Speaker and faculty fees$202%
Companies that paid Dr. Oliver the most, 2016 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Michael Thomas Oliver'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 DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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 Thomas Oliver
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 Thomas Oliver's NPI number?
Dr. Michael Thomas Oliver's NPI number is 1487613014. It was assigned on March 22, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Michael Thomas Oliver?
Dr. Michael Thomas Oliver is a gastroenterologist in Covina, California. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Michael Thomas Oliver practice?
Dr. Oliver practices at 420 W Rowland St, Covina, CA 91723-2943. Dr. Oliver's primary practice is Magan Medical Clinic in Covina, California. Dmand AI also links Dr. Oliver to 1 medical group.
What is Dr. Michael Thomas Oliver's office phone number?
The practice phone on file for Dr. Oliver is (626) 331-6411.
What is Dr. Michael Thomas Oliver's medical license number?
Dr. Oliver holds California license G45521.
Does Dr. Michael Thomas Oliver accept Medicare?
Yes. CMS data shows Dr. Oliver billed Medicare for 52 services in 2021.
What services does Dr. Michael Thomas Oliver bill to Medicare?
In 2021, Dr. Oliver's most billed Medicare services were care management and other visits (99441), care management and other visits (99442) and surgery: digestive system (45378).
What drugs does Dr. Michael Thomas Oliver prescribe most?
In 2021 Medicare Part D data, Dr. Oliver's most prescribed drugs by claims were Omeprazole, Pantoprazole Sodium and Mesalamine.
Has Dr. Michael Thomas Oliver received payments from drug or device companies?
CMS Open Payments shows $967 in general payments to Dr. Oliver from 18 companies from 2016 to 2023. The largest total came from Abbott Laboratories.
How long has Dr. Michael Thomas Oliver been practicing?
Dr. Oliver's NPI was assigned in 2006.
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