Dr. William T. Tseng, MD
- Medicare services, 2024
- 830
- Medicare patients, 2024
- 387
- Hospital affiliations
- 1
- Industry payments
- $335
- Medical group
- 1
- Practice address
- 9455 Clairemont Mesa Blvd, San Diego, CA 92123
- Practice phone
- Call (619) 528-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Kaiser Permanente San Diego Medical Center
San Diego, California
Find Dr. Tseng'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. William T. Tseng is an internist in San Diego, California
Dr. Tseng practices at Kaiser Permanente San Diego Medical Center in San Diego, California.
Dr. Tseng's NPI, 1093874752, was assigned on December 8, 2006. Dr. Tseng graduated from Spencer Fox Eccles School of Medicine in 1996. Dr. Tseng holds California license A68201.
- NPI
- 1093874752NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6800940552
- NPI enumeration date
- December 8, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (619) 528-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 56
- Medical school graduation
- 1996
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. William T. Tseng practices at Kaiser Permanente San Diego Medical Center in San Diego, California
Dr. Tseng's primary practice is Kaiser Permanente San Diego Medical Center, at 9455 Clairemont Mesa Blvd, San Diego, CA 92123 in San Diego County. The practice phone is (619) 528-5000.
- Kaiser Permanente San Diego Medical Center9455 Clairemont Mesa Blvd, San Diego, CA 92123 · San Diego CountyPhone(619) 528-5000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. William T. Tseng is affiliated with 2 sites of care and 1 medical group
Dr. Tseng's primary practice is Kaiser Permanente San Diego Medical Center in San Diego, California. Dr. Tseng is also affiliated with Kaiser Permanente Zion Medical Center. The medical group on file is Southern California Permanente Medical Group.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. William T. Tseng's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Tseng practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Kaiser Permanente San Diego 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. William T. Tseng is one of 16,751 internists in California
Internal medicine is Dr. Tseng's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Tseng is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Tseng's licenses on file in 2 states: California and Maryland.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
- Maryland license
Internists near Dr. Tseng
Counts of internists 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. William T. Tseng billed Medicare for 830 services in 2024
CMS data shows 830 Medicare services from Dr. Tseng across 2 procedure codes in 2024, for 387 Medicare patients. Medicare paid $77,651 for them. Every service was in an office.
Dr. Tseng's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 2522024: 830229%
Dr. Tseng compared with the California median for internists, 2024
- Dr. Tseng
- California median
- Medicare services
- 830vs 3612.3 times
- Medicare patients
- 387vs 1512.6 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Tseng'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. Tseng?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Tseng and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. William T. Tseng treated 387 Medicare patients in 2024, average age 68
CMS counts 387 Medicare patients who saw Dr. Tseng in 2024. The largest group is 65 to 74, with 192 patients. 54% of them have high blood pressure, and 50% have high cholesterol. 54% are also on Medicaid. Their average risk score is 1.13, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Tseng's median patient age at 65, with 55% women.
Dr. Tseng's Medicare patients by age, 2024
Dr. Tseng's Medicare patients by sex, 2024
- Women21355%
- Men17445%
Chronic conditions among Dr. Tseng's Medicare patients, 2024
- High blood pressure54%
- High cholesterol50%
- Diabetes40%
- Arthritis24%
- Mood disorders20%
- Chronic kidney disease19%
- Depression17%
- Anxiety15%
Share of Medicare patients with each condition. A patient can have several.
Dr. Tseng's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 65
Patient panel by sex, all payers
- Women55%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. William T. Tseng takes part in Medicare
Dr. Tseng 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. William T. Tseng received $335 in industry payments from 2023 to 2025
CMS Open Payments shows 10 general payments to Dr. Tseng from 3 drug and device companies from 2023 to 2025. Food and beverage make up the largest share, 100% of the total. AstraZeneca Pharmaceuticals LP paid the most, $165.
General payments to Dr. Tseng by program year, 2023 to 2025
Companies that paid Dr. Tseng the most, 2023 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. William T. Tseng graduated from Spencer Fox Eccles School of Medicine
Dr. Tseng graduated from Spencer Fox Eccles School of Medicine in 1996.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. William T. Tseng accepts plans from 2 insurance carriers
Dr. Tseng 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 Dr. Tseng accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. William T. Tseng'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 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) |
| 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 Dr. William T. Tseng
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. William T. Tseng's NPI number?
Dr. William T. Tseng's NPI number is 1093874752. It was assigned on December 8, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. William T. Tseng?
Dr. William T. Tseng is an internist in San Diego, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. William T. Tseng practice?
Dr. Tseng practices at 9455 Clairemont Mesa Blvd, San Diego, CA 92123. Dr. Tseng's primary practice is Kaiser Permanente San Diego Medical Center in San Diego, California.
What is Dr. William T. Tseng's office phone number?
The practice phone on file for Dr. Tseng is (619) 528-5000.
What is Dr. William T. Tseng's medical license number?
Dr. Tseng holds California license A68201, one of the licenses on file in 2 states.
Which states has Dr. William T. Tseng been licensed in?
Dmand AI has state licenses on file for Dr. Tseng in California (1999 to 2026) and Maryland (1999 to 2011).
Which hospitals is Dr. William T. Tseng affiliated with?
Dr. Tseng is affiliated with Kaiser Permanente Zion Medical Center.
What medical group is Dr. William T. Tseng part of?
Dr. Tseng is linked to Southern California Permanente Medical Group.
Does Dr. William T. Tseng accept Medicare?
Yes. CMS data shows Dr. Tseng billed Medicare for 830 services in 2024, and Dr. Tseng accepts Medicare assignment.
How many Medicare patients does Dr. William T. Tseng see?
CMS counts 387 Medicare patients who saw Dr. Tseng in 2024, with an average age of 68.
Show 6 more questionsShow fewer questions
Is Dr. William T. Tseng board certified?
Yes. Dr. Tseng is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. William T. Tseng bill to Medicare?
In 2024, Dr. Tseng's most billed Medicare services were medical service (91320) and vaccine or vaccine administration (90480).
Where did Dr. William T. Tseng go to medical school?
Dr. Tseng graduated from Spencer Fox Eccles School of Medicine in 1996.
Has Dr. William T. Tseng received payments from drug or device companies?
CMS Open Payments shows $335 in general payments to Dr. Tseng from 3 companies from 2023 to 2025. The largest total came from AstraZeneca Pharmaceuticals LP.
How long has Dr. William T. Tseng been practicing?
Dr. Tseng graduated from medical school in 1996, 30 years ago.
What insurance does Dr. William T. Tseng accept?
Dr. Tseng 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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