Joseph Simon Ou
- Medicare patients, 2024
- 21
- Part D claims, 2024
- 3,395
- Hospital affiliations
- 1
- Industry payments
- $301
- Medical group
- 1
- Practice address
- 975 Sereno Dr, Vallejo, CA 94589
- Practice phone
- Call (707) 651-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Joseph Ou'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.
Joseph Simon Ou is a family medicine physician in Vallejo, California
Joseph Ou practices at Vallejo Medical Center in Vallejo, California, part of Kaiser Permanente.
Joseph Ou's NPI, 1477084382, was assigned on March 22, 2017. Joseph Ou graduated from Arizona School of Dentistry and Oral Health - Mesa in 2017. Joseph Ou holds California license 20A18203.
- NPI
- 1477084382NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2264703388
- NPI enumeration date
- March 22, 2017
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (707) 651-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 35
- Medical school graduation
- 2017
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Joseph Simon Ou practices at Vallejo Medical Center in Vallejo, California
Joseph Ou's primary practice is Vallejo Medical Center, at 975 Sereno Dr, Vallejo, CA 94589 in Solano County. The practice phone is (707) 651-1000.
- Vallejo Medical Center975 Sereno Dr, Vallejo, CA 94589 · Solano CountyPhone(707) 651-1000
Source: Dmand AI Affiliation Data
Joseph Simon Ou is affiliated with 3 sites of care and 1 medical group
Joseph Ou's primary practice is Vallejo Medical Center in Vallejo, California, part of Kaiser Permanente. The medical group on file is The Permanente Medical Group, Inc. Dmand AI also links Joseph Ou to 1 more home health agency and 1 hospice, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Joseph Simon Ou's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Joseph Ou practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Vallejo Medical Center | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Joseph Simon Ou is one of 15,680 family medicine physicians in California
Family medicine is Joseph Ou's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Joseph Ou is board certified in family medicine by the American Board of Family Medicine. Dmand AI has Joseph Ou's licenses on file in 3 states: California, Ohio and Illinois.
Specialties and state licenses
- Family medicine, CaliforniaPrimary
- Ohio license
- Illinois license
Clinical focus
Dmand AI lists arthritis, chronic diabetes, chronic hypertension, epilepsy, gastroenteritis, heart blockage, heart valve disorders and itchy rashes among the conditions Joseph Ou treats.
Family medicine physicians near Joseph Ou
Counts of family 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
Joseph Simon Ou treated 21 Medicare patients in 2024, average age 64
CMS counts 21 Medicare patients who saw Joseph Ou in 2024. 52% of them have diabetes. Their average risk score is 1.51, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Joseph Ou's median patient age at 54, with 43% women.
Chronic conditions among Joseph Ou's Medicare patients, 2024
- Diabetes52%
Share of Medicare patients with each condition. A patient can have several.
Joseph Ou's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 54
Patient panel by sex, all payers
- Women43%
- Men56%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Joseph Simon Ou wrote 3,395 Medicare Part D claims in 2024
In 2024, Joseph Ou wrote 3,395 Medicare Part D claims for 517 patients. 87% of them were for generic drugs. CMS names the drug for 2,825 of them, across 66 drugs with 11 or more claims each, at $109,089 in total drug cost. In 2023, CMS named 2,038 claims across 56 drugs.
Joseph Ou's Part D claims by kind of drug, 2024
- Generic2,948 claims87%
- Brand-name390 claims11%
- Other57 claims2%
Joseph Ou'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 Joseph Ou's Part D claims, 2024
- Opioids5%160 of 3,395 claims
- Antibiotics2%76 of 3,395 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: 2,0382024: 2,82539%
Drugs named by CMS: 66 in 2024, 56 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
Joseph Simon Ou offers telehealth to Medicare patients
Joseph Ou accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Joseph Ou as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Joseph Simon Ou received $301 in industry payments from 2018 to 2020
CMS Open Payments shows 7 general payments to Joseph Ou from 5 drug and device companies from 2018 to 2020. Food and beverage make up the largest share, 100% of the total. Abbvie Inc. paid the most, $121.
General payments to Joseph Ou by program year, 2018 to 2020
Companies that paid Joseph Ou the most, 2018 to 2020
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Joseph Simon Ou graduated from Arizona School of Dentistry and Oral Health - Mesa
Joseph Ou graduated from Arizona School of Dentistry and Oral Health - Mesa in 2017.
- Medical school
- Board certified in family medicine
Source: Dmand AI Professional Profile Data
Joseph Simon Ou accepts plans from 2 insurance carriers
Joseph Ou is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
Plan types Joseph Ou accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Joseph Simon Ou'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 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (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 Joseph Simon Ou
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Joseph Simon Ou's NPI number?
Joseph Simon Ou's NPI number is 1477084382. It was assigned on March 22, 2017, and it is active in the NPI Registry.
What does Joseph Simon Ou specialize in?
Joseph Simon Ou is a family medicine physician in Vallejo, California. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Joseph Simon Ou practice?
Joseph Ou practices at 975 Sereno Dr, Vallejo, CA 94589. Joseph Ou's primary practice is Vallejo Medical Center in Vallejo, California, part of Kaiser Permanente. Dmand AI also links Joseph Ou to 1 home health agency and 1 hospice.
What is Joseph Simon Ou's office phone number?
The practice phone on file for Joseph Ou is (707) 651-1000.
What is Joseph Simon Ou's medical license number?
Joseph Ou holds California license 20A18203, one of the licenses on file in 3 states.
Which states has Joseph Simon Ou been licensed in?
Dmand AI has state licenses on file for Joseph Ou in California (2020 to 2027), Ohio (2017 to 2021) and Illinois (2012 to 2014).
Which hospitals is Joseph Simon Ou affiliated with?
Joseph Ou practices at Vallejo Medical Center in Vallejo, California.
What medical group is Joseph Simon Ou part of?
Joseph Ou is linked to The Permanente Medical Group, Inc.
Does Joseph Simon Ou accept Medicare?
Yes. CMS lists Joseph Ou as accepting Medicare assignment.
Does Joseph Simon Ou offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Joseph Ou as offering telehealth services.
Show 7 more questionsShow fewer questions
How many Medicare patients does Joseph Simon Ou see?
CMS counts 21 Medicare patients who saw Joseph Ou in 2024, with an average age of 64.
Is Joseph Simon Ou board certified?
Yes. Joseph Ou is board certified in family medicine by the American Board of Family Medicine.
Where did Joseph Simon Ou go to medical school?
Joseph Ou graduated from Arizona School of Dentistry and Oral Health - Mesa in 2017.
What drugs does Joseph Simon Ou prescribe most?
In 2024 Medicare Part D data, Joseph Ou's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Albuterol Sulfate Hfa.
Has Joseph Simon Ou received payments from drug or device companies?
CMS Open Payments shows $301 in general payments to Joseph Ou from 5 companies from 2018 to 2020. The largest total came from Abbvie Inc.
How long has Joseph Simon Ou been practicing?
Joseph Ou graduated from medical school in 2017, 9 years ago.
What insurance does Joseph Simon Ou accept?
Joseph Ou is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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