Appl Clin Inform
Dr. Dennis T. Hsieh, MD
- Medicare services, 2024
- 103
- Medicare patients, 2024
- 93
- Part D claims, 2024
- 54
- Publications
- 5
- Hospital affiliations
- 6
- 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. Hsieh'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. Dennis T. Hsieh is an emergency medicine physician in San Jose, California
Dr. Hsieh practices at Santa Clara Valley Medical Center in San Jose, California, part of County of Santa Clara, CA.
Dr. Hsieh's NPI, 1649520701, was assigned on September 17, 2012. Dr. Hsieh graduated from UCSF School of Medicine in 2012. Dr. Hsieh holds California license A129373.
- NPI
- 1649520701NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0042525214
- NPI enumeration date
- September 17, 2012
- 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
- 40
- Medical school graduation
- 2012
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Dennis T. Hsieh practices at Santa Clara Valley Medical Center in San Jose, California
Dr. Hsieh'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. Dennis T. Hsieh is affiliated with 7 sites of care and 10 medical groups
Dr. Hsieh's primary practice is Santa Clara Valley Medical Center in San Jose, California, part of County of Santa Clara, CA. Dr. Hsieh is also affiliated with Harbor-UCLA Medical Center. The medical group on file is Vituity. Dmand AI also links Dr. Hsieh to 4 more hospitals, 9 medical groups and 1 community health center, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Dennis T. Hsieh's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hsieh practices, 7 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 |
| +6 more sites and 9 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across County of Santa Clara, CA and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Dennis T. Hsieh is one of 7,423 emergency medicine physicians in California
Emergency medicine is Dr. Hsieh's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Hsieh is board certified in emergency medicine by the American Board of Emergency Medicine. Dr. Hsieh is licensed in California.
Specialties and state licenses
- Emergency medicine, CaliforniaPrimary
Emergency medicine physicians near Dr. Hsieh
Counts of emergency 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
Dr. Dennis T. Hsieh billed Medicare for 103 services in 2024
CMS data shows 103 Medicare services from Dr. Hsieh across 4 procedure codes in 2024, for 93 Medicare patients. Medicare paid $12,859 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Hsieh's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1322024: 9131%
- Tests and treatments
- 2023: 142024: 1214%
Dr. Hsieh compared with the California median for emergency medicine physicians, 2024
- Dr. Hsieh
- California median
- Medicare services
- 103vs 26561% below
- Medicare patients
- 93vs 24362% below
- Part D claims
- 11vs 6282% below
Medians across 7,079 emergency medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Hsieh'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. Hsieh and other emergency medicine physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Dennis T. Hsieh treated 93 Medicare patients in 2024, average age 78
CMS counts 93 Medicare patients who saw Dr. Hsieh in 2024. The largest group is 75 to 84, with 39 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 81% are also on Medicaid. Their average risk score is 2.58, 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. Hsieh's median patient age at 54, with 50% women.
Dr. Hsieh's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Hsieh's Medicare patients by sex, 2024
- Women4447%
- Men4953%
Chronic conditions among Dr. Hsieh's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes51%
- Chronic kidney disease44%
- Heart failure40%
- Arthritis35%
- Ischemic heart disease31%
- Alzheimer's and dementia27%
Share of Medicare patients with each condition. A patient can have several.
Dr. Hsieh'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
- Women50%
- Men49%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Dennis T. Hsieh wrote 54 Medicare Part D claims in 2024
In 2024, Dr. Hsieh wrote 54 Medicare Part D claims for 38 patients. 93% of them were for generic drugs. CMS names the drug for 11 of them, across 1 drug with 11 or more claims each, at $85 in total drug cost. In 2023, CMS named 23 claims across 2 drugs.
Dr. Hsieh's Part D claims by kind of drug, 2024
- Generic50 claims93%
- Brand-name and other4 claims7%
Dr. Hsieh'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. Hsieh's Part D claims, 2024
- Antibiotics33%18 of 54 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: 232024: 1152%
Drugs named by CMS: 1 in 2024, 2 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
How Dr. Dennis T. Hsieh takes part in Medicare
Dr. Hsieh 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. Dennis T. Hsieh has 5 publications on record
Dmand AI links 5 papers to Dr. Hsieh, published from 2016 to 2023. The most frequent topics are Emergency Service, Hospital and Software. Dr. Hsieh's most frequent co-authors are Erik Sorem Anderson, MD, Brock Chimileski and Wendy Coates, MD.
Dr. Hsieh's papers by year, 2016 to 2023
Topics Dr. Hsieh writes about most
- Emergency Service, Hospital
- Software
Dr. Hsieh's most frequent co-authors
- Erik Sorem Anderson, MD1 shared paper
- Brock Chimileski1 shared paper
- Wendy Coates, MD1 shared paper
Recent publications by Dr. Hsieh
West J Emerg Med
AMIA Annu Symp Proc
See who Dr. Hsieh researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Hsieh works with, so you can find a warm path to the right emergency medicine physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Dennis T. Hsieh received $63 in industry payments from 2019 to 2024
CMS Open Payments shows 2 general payments to Dr. Hsieh from 2 drug and device companies from 2019 to 2024. Food and beverage make up the largest share, 60% of the total. Genentech, Inc. paid the most, $38.
General payments to Dr. Hsieh by program year, 2019 to 2024
General payments to Dr. Hsieh by kind, 2019 to 2024
- Food and beverage$3860%
- Speaker and faculty fees$2540%
Companies that paid Dr. Hsieh the most, 2019 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Dennis T. Hsieh graduated from UCSF School of Medicine
Dr. Hsieh graduated from UCSF School of Medicine in 2012.
- Medical school
- Board certified in emergency medicine
Source: Dmand AI Professional Profile Data
Dr. Dennis T. Hsieh accepts plans from 1 insurance carrier
Dr. Hsieh is in network with 1 carrier, including CMS Medicare. Medicare plans come from the most carriers, 1. Check the plan with the practice before a visit.
- CMS Medicare
Source: Dmand AI Insurance Network Data
Sources for Dr. Dennis T. Hsieh'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) |
| 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. Dennis T. Hsieh
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. Dennis T. Hsieh's NPI number?
Dr. Dennis T. Hsieh's NPI number is 1649520701. It was assigned on September 17, 2012, and it is active in the NPI Registry.
What kind of doctor is Dr. Dennis T. Hsieh?
Dr. Dennis T. Hsieh is an emergency medicine physician in San Jose, California. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Dennis T. Hsieh practice?
Dr. Hsieh practices at 751 South Bascom Avenue, San Jose, CA 95128. Dr. Hsieh'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. Hsieh to 4 hospitals, 9 medical groups and 1 community health center.
What is Dr. Dennis T. Hsieh's office phone number?
The practice phone on file for Dr. Hsieh is (408) 885-5000.
What is Dr. Dennis T. Hsieh's medical license number?
Dr. Hsieh holds California license A129373.
Which hospitals is Dr. Dennis T. Hsieh affiliated with?
Dr. Hsieh practices at Santa Clara Valley Medical Center in San Jose, California. Dr. Hsieh is also affiliated with Harbor-UCLA Medical Center. Dmand AI links Dr. Hsieh to 4 more hospitals.
What medical group is Dr. Dennis T. Hsieh part of?
Dr. Hsieh is linked to Vituity. Dmand AI links Dr. Hsieh to 9 more medical groups.
Does Dr. Dennis T. Hsieh accept Medicare?
Yes. CMS data shows Dr. Hsieh billed Medicare for 103 services in 2024, and Dr. Hsieh accepts Medicare assignment.
How many Medicare patients does Dr. Dennis T. Hsieh see?
CMS counts 93 Medicare patients who saw Dr. Hsieh in 2024, with an average age of 78.
Is Dr. Dennis T. Hsieh board certified?
Yes. Dr. Hsieh is board certified in emergency medicine by the American Board of Emergency Medicine.
Show 8 more questionsShow fewer questions
What services does Dr. Dennis T. Hsieh bill to Medicare?
In 2024, Dr. Hsieh's most billed Medicare services were emergency department visit (99285), emergency department visit (99284) and heart test or procedure (93010).
Where did Dr. Dennis T. Hsieh go to medical school?
Dr. Hsieh graduated from UCSF School of Medicine in 2012.
What drugs does Dr. Dennis T. Hsieh prescribe most?
In 2024 Medicare Part D data, Dr. Hsieh's most prescribed drugs by claims were Cephalexin.
Has Dr. Dennis T. Hsieh received payments from drug or device companies?
CMS Open Payments shows $63 in general payments to Dr. Hsieh from 2 companies from 2019 to 2024. The largest total came from Genentech, Inc.
How long has Dr. Dennis T. Hsieh been practicing?
Dr. Hsieh graduated from medical school in 2012, 14 years ago.
Does Dr. Dennis T. Hsieh do research?
Dmand AI links 5 publications to Dr. Hsieh, published from 2016 to 2023.
Who does Dr. Dennis T. Hsieh publish with?
Dr. Hsieh's most frequent co-authors are Erik Sorem Anderson, MD (1 shared paper), Brock Chimileski (1 shared paper) and Wendy Coates, MD (1 shared paper).
What insurance does Dr. Dennis T. Hsieh accept?
Dr. Hsieh is in network with 1 carrier, including CMS Medicare. Medicare plans come from the most carriers, 1. Check the plan with the practice before a visit.
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