Dr. Tsung Tso Tsai, MD
- Medicare services, 2024
- 18
- Medicare patients, 2024
- 20
- Part D claims, 2024
- 10,211
- Hospital affiliations
- 1
- Medical group
- 1
- Practice address
- 9961 Sierra Ave, Fontana, CA 92335
- Practice phone
- Call (909) 427-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Tsai'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. Tsung Tso Tsai is a general practice physician in Fontana, California
Dr. Tsai practices at Fontana Medical Center in Fontana, California, part of Kaiser Permanente.
Dr. Tsai's NPI, 1629250394, was assigned on December 4, 2007. Dr. Tsai graduated from University of the Philippines College of Medicine in 2004. Dr. Tsai's California license number on file is A114112.
- NPI
- 1629250394NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0143407155
- NPI enumeration date
- December 4, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (909) 427-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 48
- Medical school graduation
- 2004
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Tsung Tso Tsai practices at Fontana Medical Center in Fontana, California
Dr. Tsai's primary practice is Fontana Medical Center, at 9961 Sierra Ave, Fontana, CA 92335 in San Bernardino County. The practice phone is (909) 427-5000.
- Fontana Medical Center9961 Sierra Ave, Fontana, CA 92335 · San Bernardino CountyPhone(909) 427-5000
Source: Dmand AI Affiliation Data
Dr. Tsung Tso Tsai is affiliated with 2 sites of care and 1 medical group
Dr. Tsai's primary practice is Fontana Medical Center in Fontana, California, part of Kaiser Permanente. The medical group on file is Southern California Permanente Medical Group. Dmand AI also links Dr. Tsai to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Tsung Tso Tsai's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Tsai practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Fontana 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. Tsung Tso Tsai is one of 1,526 general practice physicians in California
General practice is Dr. Tsai's primary specialty in the NPI Registry, under taxonomy code 208D00000X. Dr. Tsai is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Tsai's licenses on file in 2 states: California and Ohio.
Specialties and state licenses
- General practice, CaliforniaPrimary
- Student in an organized health care education/training program, Ohio
Clinical focus
Dmand AI lists carpal tunnel syndrome and UTI among the conditions Dr. Tsai treats.
General practice physicians near Dr. Tsai
Counts of general practice 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
Dr. Tsung Tso Tsai billed Medicare for 18 services in 2024
CMS data shows 18 Medicare services from Dr. Tsai across 1 procedure code in 2024, all of them office visits, for 20 Medicare patients. Medicare paid $1,411 for them. Every service was in an office.
Dr. Tsai's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 152024: 1820%
Dr. Tsai compared with the California median for general practice physicians, 2024
- Dr. Tsai
- California median
- Medicare services
- 18vs 26293% below
- Medicare patients
- 20vs 13685% below
- Part D claims
- 9,623vs 19250.1 times
Medians across 1,114 general practice physicians in California with Dmand AI profiles that report each measure.
Dr. Tsai'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. Tsai and other general practice physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Tsung Tso Tsai treated 20 Medicare patients in 2024, average age 65
CMS counts 20 Medicare patients who saw Dr. Tsai in 2024. 70% of them have high blood pressure. Their average risk score is 2.19, 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. Tsai's median patient age at 53, with 65% women.
Chronic conditions among Dr. Tsai's Medicare patients, 2024
- High blood pressure70%
Share of Medicare patients with each condition. A patient can have several.
Dr. Tsai's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 53
Patient panel by sex, all payers
- Women65%
- Men35%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Tsung Tso Tsai wrote 10,211 Medicare Part D claims in 2024
In 2024, Dr. Tsai wrote 10,211 Medicare Part D claims for 1,270 patients. 89% of them were for generic drugs. CMS names the drug for 9,623 of them, across 145 drugs with 11 or more claims each, at $461,431 in total drug cost. In 2023, CMS named 9,083 claims across 135 drugs.
Dr. Tsai's Part D claims by kind of drug, 2024
- Generic9,130 claims89%
- Brand-name913 claims9%
- Other168 claims2%
Dr. Tsai'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. Tsai's Part D claims, 2024
- Opioids8%843 of 10,211 claims
- Antibiotics3%260 of 10,211 claims
- Antipsychotics, patients 65 and over0%12 of 10,211 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: 9,0832024: 9,6236%
Drugs named by CMS: 145 in 2024, 135 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. Tsung Tso Tsai offers telehealth to Medicare patients
Dr. Tsai accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Tsai as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Tsung Tso Tsai has 4 awards and honors on record
Dmand AI lists 4 awards for Dr. Tsai, most recently NCQA DRP in 2016.
Awards and honors for Dr. Tsai
- 2016
- NCQA DRP
- NCQA PCMH
- 2013
- Bridges to Excellence
- Undated
- CMS Stage 1 2012
Source: Dmand AI Professional Profile Data
Dr. Tsung Tso Tsai graduated from University of the Philippines College of Medicine
Dr. Tsai graduated from University of the Philippines College of Medicine in 2004.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Tsung Tso Tsai accepts plans from 2 insurance carriers
Dr. Tsai 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. Tsai accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Tsung Tso Tsai'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) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| 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. Tsung Tso Tsai
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. Tsung Tso Tsai's NPI number?
Dr. Tsung Tso Tsai's NPI number is 1629250394. It was assigned on December 4, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Tsung Tso Tsai?
Dr. Tsung Tso Tsai is a general practice physician in Fontana, California. The primary specialty in the NPI Registry is General Practice Physician (taxonomy code 208D00000X).
Where does Dr. Tsung Tso Tsai practice?
Dr. Tsai practices at 9961 Sierra Ave, Fontana, CA 92335. Dr. Tsai's primary practice is Fontana Medical Center in Fontana, California, part of Kaiser Permanente. Dmand AI also links Dr. Tsai to 1 group practice or clinic.
What is Dr. Tsung Tso Tsai's office phone number?
The practice phone on file for Dr. Tsai is (909) 427-5000.
What is Dr. Tsung Tso Tsai's medical license number?
Dr. Tsai's California license number on file is A114112, one of the licenses on file in 2 states.
Which states has Dr. Tsung Tso Tsai been licensed in?
Dmand AI has state licenses on file for Dr. Tsai in California (2010 to 2025) and Ohio (2007 to 2010).
Which hospitals is Dr. Tsung Tso Tsai affiliated with?
Dr. Tsai practices at Fontana Medical Center in Fontana, California.
What medical group is Dr. Tsung Tso Tsai part of?
Dr. Tsai is linked to Southern California Permanente Medical Group.
Does Dr. Tsung Tso Tsai accept Medicare?
Yes. CMS data shows Dr. Tsai billed Medicare for 18 services in 2024, and Dr. Tsai accepts Medicare assignment.
Does Dr. Tsung Tso Tsai offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Tsai as offering telehealth services.
Show 7 more questionsShow fewer questions
How many Medicare patients does Dr. Tsung Tso Tsai see?
CMS counts 20 Medicare patients who saw Dr. Tsai in 2024, with an average age of 65.
Is Dr. Tsung Tso Tsai board certified?
Yes. Dr. Tsai is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Tsung Tso Tsai bill to Medicare?
In 2024, Dr. Tsai's most billed Medicare services were office visit, established patient (99214).
Where did Dr. Tsung Tso Tsai go to medical school?
Dr. Tsai graduated from University of the Philippines College of Medicine in 2004.
What drugs does Dr. Tsung Tso Tsai prescribe most?
In 2024 Medicare Part D data, Dr. Tsai's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Hydrocodone-Acetaminophen.
How long has Dr. Tsung Tso Tsai been practicing?
Dr. Tsai graduated from medical school in 2004, 22 years ago.
What insurance does Dr. Tsung Tso Tsai accept?
Dr. Tsai 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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