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Dr. Timothy Patrick Ong, MD
NPI1033125075PAC ID0749344091
- Medicare services, 2024
- 24
- Medicare patients, 2024
- 66
- Part D claims, 2024
- 10,648
- Publications
- 1
- MIPS score, 2024
- 61
- Practice address
- 751 South Bascom Avenue, San Jose, CA 95128
- Practice phone
- Call (408) 885-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Ong'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. Timothy Patrick Ong is an internist in San Jose, California
Dr. Ong practices at Santa Clara Valley Medical Center in San Jose, California, part of County of Santa Clara, CA.
Dr. Ong's NPI, 1033125075, was assigned on July 31, 2006. Dr. Ong graduated from UCSF School of Medicine in 1993. Dr. Ong holds California license G80475.
NPI and contact details
- NPI
- 1033125075NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0749344091
- NPI enumeration date
- July 31, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (408) 885-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 59
- Medical school graduation
- 1993
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Timothy Patrick Ong practices at Santa Clara Valley Medical Center in San Jose, California
Dr. Ong's primary practice is Santa Clara Valley Medical Center, at 751 South Bascom Avenue, San Jose, CA 95128 in Santa Clara County. The practice phone is (408) 885-5000.
- Santa Clara Valley Medical Center751 South Bascom Avenue, San Jose, CA 95128 · Santa Clara CountyPhone(408) 885-5000
Source: Dmand AI Affiliation Data
Dr. Timothy Patrick Ong is affiliated with 8 sites of care and 1 medical group
Dr. Ong's primary practice is Santa Clara Valley Medical Center in San Jose, California, part of County of Santa Clara, CA. Dr. Ong is also affiliated with Stanford Hospital at 300 Pasteur Drive. The medical group on file is County of Santa Clara Behavioral Health Services, Las Plumas Behavioral Health Clinic. Dmand AI also links Dr. Ong to 1 more hospital, 4 home health agencies and 1 community health center, each named with a free account.
Stanford Hospital at 300 Pasteur DriveCounty of Santa Clara Behavioral Health Services, Las Plumas Behavioral Health Clinic1 hospitalName with a free account4 home health agenciesNames with a free account1 community health centerName with a free account
See all 9 affiliations for Dr. OngSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Timothy Patrick Ong's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ong practices, 8 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Santa Clara Valley Medical Center | Available with a free account |
| +7 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Timothy Patrick Ong is one of 16,751 internists in California
Internal medicine is Dr. Ong's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Ong is board certified in internal medicine by the American Board of Internal Medicine. Dr. Ong is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists acid reflux, acute skin infection, aneurysm, anxiety, arthritis, asthma, atrial fibrillation and flutter and chronic diabetes among the conditions Dr. Ong treats.
Internists near Dr. Ong
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
16,751internists in California371internists in San Jose139internists at Santa Clara Valley Medical Center
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Timothy Patrick Ong billed Medicare for 24 services in 2024
CMS data shows 24 Medicare services from Dr. Ong across 2 procedure codes in 2024, for 66 Medicare patients. Medicare paid $1,693 for them. Every service was in an office.
Medicare services, 202424
Medicare patients66
Paid by Medicare$1,693
Procedure codes2
Dr. Ong's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Imaging
- 2023: 172024: 2441%
Dr. Ong compared with the California median for internists, 2024
- Dr. Ong
- California median
- Medicare services
- 24vs 36193% below
- Medicare patients
- 66vs 15156% below
- Part D claims
- 9,829vs 42123.3 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Ong'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.
Need commercial claims for Dr. Ong?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Ong and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Timothy Patrick Ong treated 66 Medicare patients in 2024, average age 73
CMS counts 66 Medicare patients who saw Dr. Ong in 2024. The largest group is 65 to 74, with 33 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 1.14, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Ong's median patient age at 69, with 48% women.
Medicare patients, 202466
Average age73
Average risk score1.14
Dr. Ong's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Ong's Medicare patients by sex, 2024
- Women4162%
- Men2538%
Chronic conditions among Dr. Ong's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes50%
- Arthritis30%
- Mood disorders23%
- Anxiety20%
- Depression20%
- Heart failure17%
Share of Medicare patients with each condition. A patient can have several.
Dr. Ong's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women48%
- Men51%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Timothy Patrick Ong wrote 10,648 Medicare Part D claims in 2024
In 2024, Dr. Ong wrote 10,648 Medicare Part D claims for 640 patients. 85% of them were for generic drugs. CMS names the drug for 9,829 of them, across 150 drugs with 11 or more claims each, at $949,310 in total drug cost. In 2023, CMS named 9,524 claims across 159 drugs.
Part D claims, 202410,648
Drugs named by CMS150
Total drug cost$949,310
Part D patients640
Dr. Ong's Part D claims by kind of drug, 2024
- Generic9,014 claims85%
- Brand-name1,519 claims14%
- Other115 claims1%
Dr. Ong'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. Ong's Part D claims, 2024
- Opioids6%604 of 10,648 claims
- Antibiotics0%51 of 10,648 claims
- Antipsychotics, patients 65 and over1%55 of 10,648 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: 9,5242024: 9,8293%
Drugs named by CMS: 150 in 2024, 159 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
Dr. Timothy Patrick Ong scored 61 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 61 out of 100 for Dr. Ong for performance year 2024, reported as part of a group. Dr. Ong accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Ong's MIPS scores, performance year 2024
- 61of 100Final score
- 59.4of 100Quality
- 0of 100Promoting Interoperability
- 40of 100Improvement Activities
- 71of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Timothy Patrick Ong has 1 publication on record
Dmand AI links 1 paper to Dr. Ong. Dr. Ong's most frequent co-authors are James Mailhot, MD and Kelly J. Tucker, MD.
Papers1
Dr. Ong's most frequent co-authors
Recent publications by Dr. Ong
See who Dr. Ong researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Ong works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Timothy Patrick Ong received $17 in industry payments in 2017
CMS Open Payments shows 1 general payment to Dr. Ong from 1 drug or device company in 2017. Food and beverage make up the largest share, 100% of the total. Alkermes, Inc. paid the most, $17.
Companies that paid Dr. Ong the most, 2017 to 2017
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Timothy Patrick Ong graduated from UCSF School of Medicine
Dr. Ong graduated from UCSF School of Medicine in 1993.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Timothy Patrick Ong accepts plans from 9 insurance carriers
Dr. Ong is in network with 9 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- United Healthcare
- Blue Cross and Blue Shield of Kansas City
- +1 more carriersWith a free account
Plan types Dr. Ong accepts, by number of carriers
- Medicare7
- PPO6
- HMO4
- POS4
- EPO3
Source: Dmand AI Insurance Network Data
Sources for Dr. Timothy Patrick Ong'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)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)Clinician Public Reporting: Overall MIPS Performance (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 |
| 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. Timothy Patrick Ong
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. Timothy Patrick Ong's NPI number?
Dr. Timothy Patrick Ong's NPI number is 1033125075. It was assigned on July 31, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Timothy Patrick Ong?
Dr. Timothy Patrick Ong is an internist in San Jose, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Timothy Patrick Ong practice?
Dr. Ong practices at 751 South Bascom Avenue, San Jose, CA 95128. Dr. Ong's primary practice is Santa Clara Valley Medical Center in San Jose, California, part of County of Santa Clara, CA. Dmand AI also links Dr. Ong to 1 hospital, 4 home health agencies and 1 community health center.
What is Dr. Timothy Patrick Ong's office phone number?
The practice phone on file for Dr. Ong is (408) 885-5000.
What is Dr. Timothy Patrick Ong's medical license number?
Dr. Ong holds California license G80475.
Which hospitals is Dr. Timothy Patrick Ong affiliated with?
Dr. Ong practices at Santa Clara Valley Medical Center in San Jose, California. Dr. Ong is also affiliated with Stanford Hospital at 300 Pasteur Drive. Dmand AI links Dr. Ong to 1 more hospital.
What medical group is Dr. Timothy Patrick Ong part of?
Dr. Ong is linked to County of Santa Clara Behavioral Health Services, Las Plumas Behavioral Health Clinic.
Does Dr. Timothy Patrick Ong accept Medicare?
Yes. CMS data shows Dr. Ong billed Medicare for 24 services in 2024, and Dr. Ong accepts Medicare assignment.
What is Dr. Timothy Patrick Ong's MIPS score?
Dr. Ong's MIPS final score for performance year 2024 is 61 out of 100, reported as part of a group.
How many Medicare patients does Dr. Timothy Patrick Ong see?
CMS counts 66 Medicare patients who saw Dr. Ong in 2024, with an average age of 73.
Show 9 more questionsShow fewer questions
Is Dr. Timothy Patrick Ong board certified?
Yes. Dr. Ong is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Timothy Patrick Ong bill to Medicare?
In 2024, Dr. Ong's most billed Medicare services were diagnostic imaging (71046) and radiation oncology (77067).
Where did Dr. Timothy Patrick Ong go to medical school?
Dr. Ong graduated from UCSF School of Medicine in 1993.
What drugs does Dr. Timothy Patrick Ong prescribe most?
In 2024 Medicare Part D data, Dr. Ong's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Metformin HCl.
Has Dr. Timothy Patrick Ong received payments from drug or device companies?
CMS Open Payments shows $17 in general payments to Dr. Ong from 1 company from 2017 to 2017. The largest total came from Alkermes, Inc.
How long has Dr. Timothy Patrick Ong been practicing?
Dr. Ong graduated from medical school in 1993, 33 years ago.
Does Dr. Timothy Patrick Ong do research?
Dmand AI links 1 publication to Dr. Ong.
Who does Dr. Timothy Patrick Ong publish with?
Dr. Ong's most frequent co-authors are James Mailhot, MD (1 shared paper) and Kelly J. Tucker, MD (1 shared paper).
What insurance does Dr. Timothy Patrick Ong accept?
Dr. Ong is in network with 9 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
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