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Dr. Michael O'Connor, MD
NPI1326188228
- Medicare services, 2019
- 13
- Part D claims, 2018
- 24
- Publications
- 70
- Industry payments
- $13
- State license
- 1
- Practice address
- 110 N Valeria St, Fresno, CA 93701
- Practice phone
- Call (330) 493-4443
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
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Dr. Michael O'Connor is an emergency medicine physician in Fresno, California
Dr. O'Connor practices in Fresno, California.
Dr. O'Connor's NPI, 1326188228, was assigned on February 8, 2007. Dr. O'Connor graduated from (King's College London - School of Medicine) in 1981. Dr. O'Connor holds California license A40941.
NPI and contact details
- NPI
- 1326188228NPI Registry (opens in a new tab)
- NPI enumeration date
- February 8, 2007
- NPI status
- Active
- Practice phone
- (330) 493-4443
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1981
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dr. Michael O'Connor's practice address is in Fresno, California
Dr. O'Connor's practice address in the NPI Registry is 110 N Valeria St, Fresno, CA 93701, in Fresno County. The practice phone is (330) 493-4443.
- NPI Registry address110 N Valeria St, Fresno, CA 93701 · Fresno CountyPhone(330) 493-4443
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. Michael O'Connor's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. O'Connor practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dr. O'Connor's practice | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Michael O'Connor is one of 7,423 emergency medicine physicians in California
Emergency medicine is Dr. O'Connor's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. O'Connor is board certified in internal medicine by the American Board of Internal Medicine. Dr. O'Connor is licensed in California.
Specialties and state licenses
- Emergency medicine, CaliforniaPrimary
Emergency medicine physicians near Dr. O'Connor
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 O'Connor billed Medicare for 13 services in 2019
CMS data shows 13 Medicare services from Dr. O'Connor across 1 procedure code in 2019. Medicare paid $1,944 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 201913
Paid by Medicare$1,944
Procedure codes1
Dr. O'Connor's Medicare services by type, 2018 to 2019
- 2018
- 2019
- Office and hospital visits
- 2018: 562019: 1377%
Dr. O'Connor compared with the California median for emergency medicine physicians, 2019
- Dr. O'Connor
- California median
- Medicare services
- 13vs 26595% below
- Part D claims
- 24vs 6261% below
Medians across 7,079 emergency medicine physicians in California with Dmand AI profiles that report each measure.
Dr. O'Connor's most billed Medicare procedure codes, 2019
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 O'Connor wrote 24 Medicare Part D claims in 2018
In 2018, Dr. O'Connor wrote 24 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $59 in total drug cost. In 2017, CMS named 37 claims across 2 drugs.
Part D claims, 201824
Drugs named by CMS1
Total drug cost$59
Dr. O'Connor's most prescribed drugs by claims, 2018
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, 2017 to 2018
- 2017
- 2018
- Claims for drugs CMS names
- 2017: 372018: 2435%
Drugs named by CMS: 1 in 2018, 2 in 2017.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Michael O'Connor has 70 publications on record
Dmand AI links 70 papers to Dr. O'Connor, published from 2019 to 2025. 2020 was the busiest year, with 11. The most frequent topics are Drosophila melanogaster, Drosophila Proteins and COVID-19. Dr. O'Connor has published most often in MicroPubl Biol. Dr. O'Connor's most frequent co-authors are Keith Jonathan Ruskin, Sajid S. Shahul and Peter Angelos.
Papers70
Years published2019 to 2025
Dr. O'Connor's papers by year, 2019 to 2025
Topics Dr. O'Connor writes about most
- Drosophila melanogaster
- Drosophila Proteins
- COVID-19
- Signal Transduction
- Larva
- Drosophila
- Pandemics
- Animals, Genetically Modified
Dr. O'Connor's most frequent co-authors
Recent publications by Dr. O'Connor
See who Dr. O'Connor researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. O'Connor works with, so you can find a warm path to the right emergency medicine physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Michael O'Connor received $13 in industry payments in 2021
CMS Open Payments shows 1 general payment to Dr. O'Connor from 1 drug or device company in 2021. Food and beverage make up the largest share, 100% of the total. Janssen Pharmaceuticals, Inc paid the most, $13.
Companies that paid Dr. O'Connor the most, 2021 to 2021
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Michael O'Connor graduated from (King's College London - School of Medicine)
Dr. O'Connor graduated from (King's College London - School of Medicine) in 1981.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Sources for Dr. Michael O'Connor'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 Practice 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 |
| 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) |
| 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 O'Connor
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 O'Connor's NPI number?
Dr. Michael O'Connor's NPI number is 1326188228. It was assigned on February 8, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Michael O'Connor?
Dr. Michael O'Connor is an emergency medicine physician in Fresno, California. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Michael O'Connor practice?
Dr. O'Connor practices at 110 N Valeria St, Fresno, CA 93701.
What is Dr. Michael O'Connor's office phone number?
The practice phone on file for Dr. O'Connor is (330) 493-4443.
What is Dr. Michael O'Connor's medical license number?
Dr. O'Connor holds California license A40941.
Does Dr. Michael O'Connor accept Medicare?
Yes. CMS data shows Dr. O'Connor billed Medicare for 13 services in 2019.
Is Dr. Michael O'Connor board certified?
Yes. Dr. O'Connor is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Michael O'Connor bill to Medicare?
In 2019, Dr. O'Connor's most billed Medicare services were emergency department visit (99285).
Where did Dr. Michael O'Connor go to medical school?
Dr. O'Connor graduated from (King's College London - School of Medicine) in 1981.
What drugs does Dr. Michael O'Connor prescribe most?
In 2018 Medicare Part D data, Dr. O'Connor's most prescribed drugs by claims were Metformin HCl.
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Has Dr. Michael O'Connor received payments from drug or device companies?
CMS Open Payments shows $13 in general payments to Dr. O'Connor from 1 company from 2021 to 2021. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. Michael O'Connor been practicing?
Dr. O'Connor graduated from medical school in 1981, 45 years ago.
Does Dr. Michael O'Connor do research?
Dmand AI links 70 publications to Dr. O'Connor, published from 2019 to 2025.
Who does Dr. Michael O'Connor publish with?
Dr. O'Connor's most frequent co-authors are Keith Jonathan Ruskin (4 shared papers), Sajid S. Shahul (3 shared papers) and Peter Angelos (2 shared papers).
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