Dr. Michael D. Oconnor, MD
- Medicare services, 2024
- 415
- Medicare patients, 2024
- 151
- Part D claims, 2024
- 2,888
- Industry payments
- $439
- Affiliated sites
- 2
- Practice address
- 2182 East St, Concord, CA 94520
- Practice phone
- Call (925) 685-4224
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Jiva Health, Inc
Concord, California
Find Dr. Oconnor's professional email, personal email and mobile number
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Dr. Michael D. Oconnor is an endocrinologist in Concord, California
Dr. Oconnor practices at Jiva Health, Inc in Concord, California.
Dr. Oconnor's NPI, 1386753317, was assigned on August 30, 2006. Dr. Oconnor graduated from Harvard Medical School in 1984. Dr. Oconnor's California license number on file is 00A446530.
- NPI
- 1386753317NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1759469075
- NPI enumeration date
- August 30, 2006
- NPI status
- Active
- Practice phone
- (925) 685-4224
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 68
- Medical school graduation
- 1984
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Michael D. Oconnor practices at Jiva Health, Inc in Concord, California
Dr. Oconnor's primary practice is Jiva Health, Inc, at 2182 East St, Concord, CA 94520 in Contra Costa County. The practice phone is (925) 685-4224.
- Jiva Health, Inc2182 East St, Concord, CA 94520 · Contra Costa CountyPhone(925) 685-4224
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Michael D. Oconnor is affiliated with 3 sites of care and 2 medical groups
Dr. Oconnor's primary practice is Jiva Health, Inc in Concord, California. The medical group on file is Jiva Health. Dmand AI also links Dr. Oconnor to 2 more group practices and clinics and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Michael D. Oconnor's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Oconnor practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Jiva Health, Inc | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Michael D. Oconnor is one of 1,062 endocrinologists in California
Endocrinology, diabetes and metabolism is Dr. Oconnor's primary specialty in the NPI Registry, under taxonomy code 207RE0101X. Dr. Oconnor is board certified in endocrinology, diabetes and metabolism by the American Board of Internal Medicine. Dmand AI has Dr. Oconnor's licenses on file in 2 states: California and Pennsylvania.
Specialties and state licenses
- Endocrinology, diabetes and metabolism, CaliforniaPrimary
- Pennsylvania license
Clinical focus
Dmand AI lists chronic diabetes, diabetic emergency, enlarged thyroid, high cholesterol, overactive thyroid, underactive thyroid and vitamin d deficiency among the conditions Dr. Oconnor treats.
Endocrinologists near Dr. Oconnor
Counts of endocrinologists 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 D. Oconnor billed Medicare for 415 services in 2024
CMS data shows 415 Medicare services from Dr. Oconnor across 4 procedure codes in 2024, for 151 Medicare patients. Medicare paid $39,053 for them. Every service was in an office.
Dr. Oconnor's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4282024: 37812%
- Lab and pathology
- 2023: 1522024: 3776%
Dr. Oconnor compared with the California median for endocrinologists, 2024
- Dr. Oconnor
- California median
- Medicare services
- 415vs 67539% below
- Medicare patients
- 151vs 24037% below
- Part D claims
- 2,346vs 1,1042.1 times
Medians across 994 endocrinologists in California with Dmand AI profiles that report each measure.
Dr. Oconnor's most billed Medicare procedure codes, 2024
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. Oconnor and other endocrinologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Michael D. Oconnor treated 151 Medicare patients in 2024, average age 77
CMS counts 151 Medicare patients who saw Dr. Oconnor in 2024. The largest group is 75 to 84, with 63 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 9% are also on Medicaid. Their average risk score is 1.16, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Oconnor's median patient age at 72, with 58% women.
Dr. Oconnor's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Oconnor's Medicare patients by sex, 2024
- Women6744%
- Men8456%
Chronic conditions among Dr. Oconnor's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes64%
- Chronic kidney disease37%
- Ischemic heart disease30%
- Arthritis29%
- Cancer19%
- Heart failure18%
Share of Medicare patients with each condition. A patient can have several.
Dr. Oconnor's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
Patient panel by sex, all payers
- Women58%
- Men33%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Michael D. Oconnor wrote 2,888 Medicare Part D claims in 2024
In 2024, Dr. Oconnor wrote 2,888 Medicare Part D claims for 327 patients. 71% of them were for generic drugs. CMS names the drug for 2,346 of them, across 56 drugs with 11 or more claims each, at $458,536 in total drug cost. In 2023, CMS named 2,201 claims across 54 drugs.
Dr. Oconnor's Part D claims by kind of drug, 2024
- Generic2,045 claims71%
- Brand-name717 claims25%
- Other126 claims4%
Dr. Oconnor's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Oconnor's Part D claims, 2024
- Opioids3%76 of 2,888 claims
- Antibiotics2%50 of 2,888 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 2,2012024: 2,3467%
Drugs named by CMS: 56 in 2024, 54 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Dr. Michael D. Oconnor received $439 in industry payments from 2016 to 2023
CMS Open Payments shows 11 general payments to Dr. Oconnor from 6 drug and device companies from 2016 to 2023. Food and beverage make up the largest share, 77% of the total. Abbott Laboratories paid the most, $196.
General payments to Dr. Oconnor by program year, 2016 to 2023
General payments to Dr. Oconnor by kind, 2016 to 2023
- Food and beverage$33977%
- Education$10023%
Companies that paid Dr. Oconnor the most, 2016 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Michael D. Oconnor graduated from Harvard Medical School
Dr. Oconnor graduated from Harvard Medical School in 1984.
- Medical school
- Board certified in endocrinology, diabetes and metabolism
Source: Dmand AI Professional Profile Data
Dr. Michael D. Oconnor accepts plans from 12 insurance carriers
Dr. Oconnor is in network with 12 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 10. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Humana
- Regence Health Plans
- +4 more carriersWith a free account
Plan types Dr. Oconnor accepts, by number of carriers
- Medicare10
- PPO8
- POS5
- HMO4
- EPO3
Source: Dmand AI Insurance Network Data
Sources for Dr. Michael D. Oconnor'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 |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation 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 DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Michael D. Oconnor
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 D. Oconnor's NPI number?
Dr. Michael D. Oconnor's NPI number is 1386753317. It was assigned on August 30, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Michael D. Oconnor?
Dr. Michael D. Oconnor is an endocrinologist in Concord, California. The primary specialty in the NPI Registry is Endocrinology, Diabetes & Metabolism Physician (taxonomy code 207RE0101X).
Where does Dr. Michael D. Oconnor practice?
Dr. Oconnor practices at 2182 East St, Concord, CA 94520. Dr. Oconnor's primary practice is Jiva Health, Inc in Concord, California. Dmand AI also links Dr. Oconnor to 2 group practices and clinics and 1 medical group.
What is Dr. Michael D. Oconnor's office phone number?
The practice phone on file for Dr. Oconnor is (925) 685-4224.
What is Dr. Michael D. Oconnor's medical license number?
Dr. Oconnor's California license number on file is 00A446530, one of the licenses on file in 2 states.
Which states has Dr. Michael D. Oconnor been licensed in?
Dmand AI has state licenses on file for Dr. Oconnor in California (1988 to 2025) and Pennsylvania (1985 to 2021).
What medical group is Dr. Michael D. Oconnor part of?
Dr. Oconnor is linked to Jiva Health. Dmand AI links Dr. Oconnor to 1 more medical group.
Does Dr. Michael D. Oconnor accept Medicare?
Yes. CMS data shows Dr. Oconnor billed Medicare for 415 services in 2024.
How many Medicare patients does Dr. Michael D. Oconnor see?
CMS counts 151 Medicare patients who saw Dr. Oconnor in 2024, with an average age of 77.
Is Dr. Michael D. Oconnor board certified?
Yes. Dr. Oconnor is board certified in endocrinology, diabetes and metabolism by the American Board of Internal Medicine.
Show 6 more questionsShow fewer questions
What services does Dr. Michael D. Oconnor bill to Medicare?
In 2024, Dr. Oconnor's most billed Medicare services were office visit, established patient (99214), lab and pathology test (82962) and office visit, established patient (99213).
Where did Dr. Michael D. Oconnor go to medical school?
Dr. Oconnor graduated from Harvard Medical School in 1984.
What drugs does Dr. Michael D. Oconnor prescribe most?
In 2024 Medicare Part D data, Dr. Oconnor's most prescribed drugs by claims were Levothyroxine Sodium, Metformin HCl and Ozempic.
Has Dr. Michael D. Oconnor received payments from drug or device companies?
CMS Open Payments shows $439 in general payments to Dr. Oconnor from 6 companies from 2016 to 2023. The largest total came from Abbott Laboratories.
How long has Dr. Michael D. Oconnor been practicing?
Dr. Oconnor graduated from medical school in 1984, 42 years ago.
What insurance does Dr. Michael D. Oconnor accept?
Dr. Oconnor is in network with 12 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 10. Check the plan with the practice before a visit.
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