Dr. John C. Oh, MD
- Medicare services, 2024
- 16
- Medicare patients, 2024
- 70
- Part D claims, 2021
- 16
- Hospital affiliations
- 2
- Industry payments
- $3,459
- Practice address
- 250 Hospital Parkway, San Jose, CA 95119
- Practice phone
- Call (408) 972-7000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. John C. Oh is a general surgeon in San Jose, California
Dr. Oh practices at San Jose Medical Center in San Jose, California, part of Kaiser Permanente.
Dr. Oh's NPI, 1427256817, was assigned on July 6, 2007. Dr. Oh graduated from Perelman School of Med at the University of Pennsylvania in 2007. Dr. Oh holds Pennsylvania license MT190660.
- NPI
- 1427256817NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3476794116
- NPI enumeration date
- July 6, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (408) 972-7000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 45
- Medical school graduation
- 2007
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John C. Oh practices at San Jose Medical Center in San Jose, California
Dr. Oh's primary practice is San Jose Medical Center, at 250 Hospital Parkway, San Jose, CA 95119 in Santa Clara County. The practice phone is (408) 972-7000.
- San Jose Medical Center250 Hospital Parkway, San Jose, CA 95119 · Santa Clara CountyPhone(408) 972-7000
Source: Dmand AI Affiliation Data
Dr. John C. Oh is affiliated with 2 sites of care and 1 medical group
Dr. Oh's primary practice is San Jose Medical Center in San Jose, California, part of Kaiser Permanente. Dr. Oh is also affiliated with Hospital of the University of Pennsylvania. The medical group on file is The Permanente Medical Group, Inc.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John C. Oh's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Oh practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| San Jose Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John C. Oh is one of 2,926 general surgeons in California
Surgery is Dr. Oh's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Oh is licensed in Pennsylvania.
Specialties and state licenses
- Surgery, PennsylvaniaPrimary
General surgeons near Dr. Oh
Counts of general surgeons 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. John C. Oh billed Medicare for 16 services in 2024
CMS data shows 16 Medicare services from Dr. Oh across 1 procedure code in 2024, for 70 Medicare patients. Medicare paid $105 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Oh's Medicare services by type, 2021 to 2024
- 2021
- 2024
- Imaging
- 2021: 602024: 1673%
Dr. Oh compared with the California median for general surgeons, 2024
- Dr. Oh
- California median
- Medicare services
- 16vs 16690% below
- Medicare patients
- 70vs 12142% below
- Part D claims
- 16vs 3453% below
Medians across 2,606 general surgeons in California with Dmand AI profiles that report each measure.
Dr. Oh'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. Oh and other general surgeons in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John C. Oh treated 70 Medicare patients in 2024, average age 69
CMS counts 70 Medicare patients who saw Dr. Oh in 2024. The largest group is 65 to 74, with 37 patients. 63% of them have high blood pressure, and 54% have arthritis. 47% are also on Medicaid. Their average risk score is 2.14, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Oh's median patient age at 55, with 59% women.
Dr. Oh's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Oh's Medicare patients by sex, 2024
- Women3449%
- Men3651%
Chronic conditions among Dr. Oh's Medicare patients, 2024
- High blood pressure63%
- Arthritis54%
- High cholesterol51%
- Diabetes46%
- Chronic kidney disease39%
- Heart failure31%
- Ischemic heart disease27%
- Atrial fibrillation26%
Share of Medicare patients with each condition. A patient can have several.
Dr. Oh's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 55
Patient panel by sex, all payers
- Women59%
- Men41%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John C. Oh wrote 16 Medicare Part D claims in 2021
In 2021, Dr. Oh wrote 16 Medicare Part D claims. They cover 1 drug, with $175 in total drug cost.
Dr. Oh'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.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
How Dr. John C. Oh takes part in Medicare
Dr. Oh 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. John C. Oh received $3,459 in industry payments from 2016 to 2025
CMS Open Payments shows 64 general payments to Dr. Oh from 9 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 77% of the total. Boston Scientific Corporation paid the most, $1,388.
General payments to Dr. Oh by program year, 2016 to 2025
General payments to Dr. Oh by kind, 2016 to 2025
- Food and beverage$2,66377%
- Travel and lodging$79623%
Companies that paid Dr. Oh the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John C. Oh graduated from Perelman School of Med at the University of Pennsylvania
Dr. Oh graduated from Perelman School of Med at the University of Pennsylvania in 2007.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John C. Oh'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 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) |
| 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 |
| 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. John C. Oh
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. John C. Oh's NPI number?
Dr. John C. Oh's NPI number is 1427256817. It was assigned on July 6, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. John C. Oh?
Dr. John C. Oh is a general surgeon in San Jose, California. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. John C. Oh practice?
Dr. Oh practices at 250 Hospital Parkway, San Jose, CA 95119. Dr. Oh's primary practice is San Jose Medical Center in San Jose, California, part of Kaiser Permanente.
What is Dr. John C. Oh's office phone number?
The practice phone on file for Dr. Oh is (408) 972-7000.
What is Dr. John C. Oh's medical license number?
Dr. Oh holds Pennsylvania license MT190660.
Which hospitals is Dr. John C. Oh affiliated with?
Dr. Oh practices at San Jose Medical Center in San Jose, California. Dr. Oh is also affiliated with Hospital of the University of Pennsylvania.
What medical group is Dr. John C. Oh part of?
Dr. Oh is linked to The Permanente Medical Group, Inc.
Does Dr. John C. Oh accept Medicare?
Yes. CMS data shows Dr. Oh billed Medicare for 16 services in 2024, and Dr. Oh accepts Medicare assignment.
How many Medicare patients does Dr. John C. Oh see?
CMS counts 70 Medicare patients who saw Dr. Oh in 2024, with an average age of 69.
What services does Dr. John C. Oh bill to Medicare?
In 2024, Dr. Oh's most billed Medicare services were diagnostic imaging (71045).
Show 4 more questionsShow fewer questions
Where did Dr. John C. Oh go to medical school?
Dr. Oh graduated from Perelman School of Med at the University of Pennsylvania in 2007.
What drugs does Dr. John C. Oh prescribe most?
In 2021 Medicare Part D data, Dr. Oh's most prescribed drugs by claims were Clopidogrel.
Has Dr. John C. Oh received payments from drug or device companies?
CMS Open Payments shows $3,459 in general payments to Dr. Oh from 9 companies from 2016 to 2025. The largest total came from Boston Scientific Corporation.
How long has Dr. John C. Oh been practicing?
Dr. Oh graduated from medical school in 2007, 19 years ago.
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