Dr. Thomas P. Hsia, MD
- Medicare services, 2024
- 1,863
- Medicare patients, 2024
- 716
- Part D claims, 2024
- 793
- MIPS score, 2024
- 89
- Hospital affiliations
- 2
- Practice address
- 361 Town Center W, Santa Maria, CA 93458
- Practice phone
- Call (805) 922-6991
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Santa Maria Gastroenterology Medical Group Inc.
Santa Maria, California
Find Dr. Hsia'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. Thomas P. Hsia is a gastroenterologist in Santa Maria, California
Dr. Hsia practices at Santa Maria Gastroenterology Medical Group Inc. in Santa Maria, California.
Dr. Hsia's NPI, 1508894486, was assigned on June 29, 2006. Dr. Hsia holds California license G060975.
- NPI
- 1508894486NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9436062395
- NPI enumeration date
- June 29, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (805) 922-6991
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 65
- Medical school graduation
- 1987
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Thomas P. Hsia practices at Santa Maria Gastroenterology Medical Group Inc. in Santa Maria, California
Dr. Hsia's primary practice is Santa Maria Gastroenterology Medical Group Inc., at 361 Town Center W, Santa Maria, CA 93458 in Santa Barbara County. The practice phone is (805) 922-6991.
- Santa Maria Gastroenterology Medical Group Inc.361 Town Center W, Santa Maria, CA 93458 · Santa Barbara CountyPhone(805) 922-6991
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Thomas P. Hsia is affiliated with 5 sites of care and 1 medical group
Dr. Hsia's primary practice is Santa Maria Gastroenterology Medical Group Inc. in Santa Maria, California. Dr. Hsia is also affiliated with Dignity Health - Marian Regional Medical Center. The medical group on file is SM Gastroenterology. Dmand AI also links Dr. Hsia to 1 more hospital, 1 physician office and 1 group practice or clinic, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Thomas P. Hsia's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hsia practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Santa Maria Gastroenterology Medical Group Inc. | Available with a free account |
| +4 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Thomas P. Hsia is one of 1,977 gastroenterologists in California
Gastroenterology is Dr. Hsia's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Hsia is licensed in California.
Specialties and state licenses
- Gastroenterology, CaliforniaPrimary
Gastroenterologists near Dr. Hsia
Counts of gastroenterologists 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. Thomas P. Hsia billed Medicare for 1,863 services in 2024
CMS data shows 1,863 Medicare services from Dr. Hsia across 17 procedure codes in 2024, for 716 Medicare patients. Medicare paid $189,688 for them.
Dr. Hsia's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,3332024: 1,3161%
- Surgery
- 2023: 5752024: 47617%
- Other services
- 2023: 182024: 41128%
- Imaging
- 2023: 02024: 30
- Tests and treatments
- 2023: 832024: 0100%
Where Dr. Hsia's Medicare services took place, 2024
- In an office1,34672%
- In a facility51728%
Dr. Hsia compared with the California median for gastroenterologists, 2024
- Dr. Hsia
- California median
- Medicare services
- 1,863vs 5863.2 times
- Medicare patients
- 716vs 3022.4 times
- Part D claims
- 600vs 38058% above
Medians across 1,875 gastroenterologists in California with Dmand AI profiles that report each measure.
Dr. Hsia'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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Thomas P. Hsia treated 716 Medicare patients in 2024, average age 72
CMS counts 716 Medicare patients who saw Dr. Hsia in 2024. The largest group is 65 to 74, with 369 patients. 73% of them have high blood pressure, and 73% have high cholesterol. 36% are also on Medicaid. Their average risk score is 1.17, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Hsia's median patient age at 63, with 57% women.
Dr. Hsia's Medicare patients by age, 2024
Dr. Hsia's Medicare patients by sex, 2024
- Women41758%
- Men29942%
Chronic conditions among Dr. Hsia's Medicare patients, 2024
- High blood pressure73%
- High cholesterol73%
- Arthritis44%
- Diabetes32%
- Anxiety26%
- Mood disorders25%
- Depression22%
- Chronic kidney disease21%
Share of Medicare patients with each condition. A patient can have several.
Dr. Hsia's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 63
Patient panel by sex, all payers
- Women57%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Thomas P. Hsia wrote 793 Medicare Part D claims in 2024
In 2024, Dr. Hsia wrote 793 Medicare Part D claims for 203 patients. 77% of them were for generic drugs. CMS names the drug for 600 of them, across 16 drugs with 11 or more claims each, at $183,274 in total drug cost. In 2023, CMS named 617 claims across 19 drugs.
Dr. Hsia's Part D claims by kind of drug, 2024
- Generic612 claims77%
- Brand-name165 claims21%
- Other16 claims2%
Dr. Hsia'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. Hsia's Part D claims, 2024
- Antibiotics6%45 of 793 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: 6172024: 6003%
Drugs named by CMS: 16 in 2024, 19 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. Thomas P. Hsia scored 89 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 89 out of 100 for Dr. Hsia for performance year 2024, reported as part of a group. Dr. Hsia accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 234 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Dr. Hsia, more than 92% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Dr. Hsia's MIPS scores, performance year 2024
- 89of 100Final score
- 74.9of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 73of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. Hsia ranks in Medicare procedure volume
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 92nd percentile234 procedures
- Colonoscopy
- 91st percentile166 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. Thomas P. Hsia received $7,147 in industry payments from 2016 to 2025
CMS Open Payments shows 386 general payments to Dr. Hsia from 35 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 99% of the total. Abbvie Inc. paid the most, $3,542.
General payments to Dr. Hsia by program year, 2016 to 2025
General payments to Dr. Hsia by kind, 2016 to 2025
- Food and beverage$7,10099%
- Education$471%
Companies that paid Dr. Hsia the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Thomas P. Hsia's profile data
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Thomas P. Hsia
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. Thomas P. Hsia's NPI number?
Dr. Thomas P. Hsia's NPI number is 1508894486. It was assigned on June 29, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Thomas P. Hsia?
Dr. Thomas P. Hsia is a gastroenterologist in Santa Maria, California. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Thomas P. Hsia practice?
Dr. Hsia practices at 361 Town Center W, Santa Maria, CA 93458. Dr. Hsia's primary practice is Santa Maria Gastroenterology Medical Group Inc. in Santa Maria, California. Dmand AI also links Dr. Hsia to 1 hospital, 1 physician office and 1 group practice or clinic.
What is Dr. Thomas P. Hsia's office phone number?
The practice phone on file for Dr. Hsia is (805) 922-6991.
What is Dr. Thomas P. Hsia's medical license number?
Dr. Hsia holds California license G060975.
Which hospitals is Dr. Thomas P. Hsia affiliated with?
Dr. Hsia is affiliated with Dignity Health - Marian Regional Medical Center. Dmand AI links Dr. Hsia to 1 more hospital.
What medical group is Dr. Thomas P. Hsia part of?
Dr. Hsia is linked to SM Gastroenterology.
Does Dr. Thomas P. Hsia accept Medicare?
Yes. CMS data shows Dr. Hsia billed Medicare for 1,863 services in 2024, and Dr. Hsia accepts Medicare assignment.
What is Dr. Thomas P. Hsia's MIPS score?
Dr. Hsia's MIPS final score for performance year 2024 is 89 out of 100, reported as part of a group.
How many Medicare patients does Dr. Thomas P. Hsia see?
CMS counts 716 Medicare patients who saw Dr. Hsia in 2024, with an average age of 72.
Show 4 more questionsShow fewer questions
What services does Dr. Thomas P. Hsia bill to Medicare?
In 2024, Dr. Hsia's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99213) and surgery: digestive system (45385).
What drugs does Dr. Thomas P. Hsia prescribe most?
In 2024 Medicare Part D data, Dr. Hsia's most prescribed drugs by claims were Famotidine, Omeprazole and Pantoprazole Sodium.
Has Dr. Thomas P. Hsia received payments from drug or device companies?
CMS Open Payments shows $7,147 in general payments to Dr. Hsia from 35 companies from 2016 to 2025. The largest total came from Abbvie Inc.
How long has Dr. Thomas P. Hsia been practicing?
Dr. Hsia graduated from medical school in 1987, 39 years ago.
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