Clin Gastroenterol Hepatol
Dr. Mary Y. Hu, MD
- Medicare services, 2024
- 312
- Medicare patients, 2024
- 196
- Part D claims, 2024
- 681
- Publications
- 6
- Hospital affiliations
- 1
- Practice address
- 3120 Kearney Street, Fremont, CA 94538
- Practice phone
- Call (510) 498-3600
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Surgery Center Fremont
Surgery Center - Medicare-Certified · Fremont, California
Find Dr. Hu'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. Mary Y. Hu is a gastroenterologist in Fremont, California
Dr. Hu practices at Surgery Center Fremont in Fremont, California.
Dr. Hu's NPI, 1659339059, was assigned on May 3, 2006. Dr. Hu graduated from Harvard Medical School in 2002. Dr. Hu holds California license A84011.
- NPI
- 1659339059NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5698836732
- NPI enumeration date
- May 3, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (510) 498-3600
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 50
- Medical school graduation
- 2002
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mary Y. Hu practices at Surgery Center Fremont in Fremont, California
Dr. Hu's primary practice is Surgery Center Fremont, at 3120 Kearney Street, Fremont, CA 94538. The practice phone is (510) 498-3600.
- Surgery Center Fremont3120 Kearney Street, Fremont, CA 94538Phone(510) 498-3600
Source: Dmand AI Affiliation Data
Dr. Mary Y. Hu is affiliated with 3 sites of care and 1 medical group
Dr. Hu's primary practice is Surgery Center Fremont in Fremont, California. Dr. Hu is also affiliated with Washington Health. The medical group on file is Palo Alto Foundation Medical Group. Dmand AI also links Dr. Hu 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. Mary Y. Hu's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hu practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Surgery Center Fremont | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mary Y. Hu is one of 1,977 gastroenterologists in California
Gastroenterology is Dr. Hu's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Hu is board certified in gastroenterology by the American Board of Internal Medicine. Dmand AI has Dr. Hu's licenses on file in 2 states: California and Massachusetts.
Specialties and state licenses
- Gastroenterology, CaliforniaPrimary
- Massachusetts license
Clinical focus
Dmand AI lists acid reflux, chronic indigestion, chronic inflammatory bowel disease (IBD), cirrhosis of the liver, colonoscopy, gastroenteritis, gastrointestinal bleeding and hepatitis c among the conditions Dr. Hu treats.
Gastroenterologists near Dr. Hu
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. Mary Y. Hu billed Medicare for 312 services in 2024
CMS data shows 312 Medicare services from Dr. Hu across 6 procedure codes in 2024, for 196 Medicare patients. Medicare paid $35,070 for them.
Dr. Hu's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 1552024: 1625%
- Office and hospital visits
- 2023: 972024: 7919%
- Other services
- 2023: 1052024: 7132%
Where Dr. Hu's Medicare services took place, 2024
- In an office7925%
- In a facility23375%
Dr. Hu compared with the California median for gastroenterologists, 2024
- Dr. Hu
- California median
- Medicare services
- 312vs 58647% below
- Medicare patients
- 196vs 30235% below
- Part D claims
- 574vs 38051% above
Medians across 1,875 gastroenterologists in California with Dmand AI profiles that report each measure.
Dr. Hu'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. Hu and other gastroenterologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mary Y. Hu treated 196 Medicare patients in 2024, average age 75
CMS counts 196 Medicare patients who saw Dr. Hu in 2024. The largest group is 65 to 74, with 101 patients. 75% of them have high cholesterol, and 63% have high blood pressure. 21% are also on Medicaid. Their average risk score is 0.97, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Hu's median patient age at 57, with 57% women.
Dr. Hu's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Hu's Medicare patients by sex, 2024
- Women13267%
- Men6433%
Chronic conditions among Dr. Hu's Medicare patients, 2024
- High cholesterol75%
- High blood pressure63%
- Arthritis36%
- Diabetes28%
- Osteoporosis28%
- Ischemic heart disease21%
- Chronic kidney disease19%
- Anxiety13%
Share of Medicare patients with each condition. A patient can have several.
Dr. Hu's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 57
Patient panel by sex, all payers
- Women57%
- Men40%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Mary Y. Hu wrote 681 Medicare Part D claims in 2024
In 2024, Dr. Hu wrote 681 Medicare Part D claims for 217 patients. 84% of them were for generic drugs. CMS names the drug for 574 of them, across 12 drugs with 11 or more claims each, at $163,453 in total drug cost. In 2023, CMS named 527 claims across 12 drugs.
Dr. Hu's Part D claims by kind of drug, 2024
- Generic570 claims84%
- Brand-name111 claims16%
Dr. Hu'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 5272024: 5749%
Drugs named by CMS: 12 in 2024, 12 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. Mary Y. Hu ranks in the 56th percentile for upper gastrointestinal (gi) endoscopy for acid reflux in Medicare
Dr. Hu accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Hu as offering telehealth. CMS counts 32 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Dr. Hu, more than 56% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Where Dr. Hu ranks in Medicare procedure volume
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 56th percentile32 procedures
- Colonoscopy
- 46th percentile18 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Mary Y. Hu has 6 publications on record
Dmand AI links 6 papers to Dr. Hu, published from 2008 to 2015. The most frequent topics are Clostridioides difficile, Enterocolitis, Pseudomembranous and Bacterial Typing Techniques. Dr. Hu has published most often in Clin Gastroenterol Hepatol. Dr. Hu's most frequent co-authors are Sarah Wilkins Flores, MD, MPH, Daniel Alexander Leffler, MD and Alan John Martin, MD.
Dr. Hu's papers by year, 2008 to 2015
Topics Dr. Hu writes about most
- Clostridioides difficile
- Enterocolitis, Pseudomembranous
- Bacterial Typing Techniques
- Electrophoresis, Gel, Pulsed-Field
- Genotype
Dr. Hu's most frequent co-authors
- Sarah Wilkins Flores, MD, MPH1 shared paper
- Daniel Alexander Leffler, MD1 shared paper
- Alan John Martin, MD1 shared paper
Recent publications by Dr. Hu
Gastroenterology
See who Dr. Hu researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Hu works with, so you can find a warm path to the right gastroenterologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Mary Y. Hu received $778 in industry payments from 2016 to 2025
CMS Open Payments shows 35 general payments to Dr. Hu from 13 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 98% of the total. Janssen Pharmaceuticals, Inc paid the most, $227.
General payments to Dr. Hu by program year, 2016 to 2025
General payments to Dr. Hu by kind, 2016 to 2025
- Food and beverage$76398%
- Education$152%
Companies that paid Dr. Hu the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Mary Y. Hu graduated from Harvard Medical School
Dr. Hu graduated from Harvard Medical School in 2002.
- Medical school
- Board certified in gastroenterology
Source: Dmand AI Professional Profile Data
Dr. Mary Y. Hu accepts plans from 11 insurance carriers
Dr. Hu is in network with 11 carriers, including Aetna, Elevance and United Healthcare. PPO plans come from the most carriers, 7. Check the plan with the practice before a visit.
- Aetna
- Elevance
- United Healthcare
- Blue Cross Blue Shield of Michigan
- HCSC
- Alliant Health Plans
- Blue Cross and Blue Shield of Kansas City
- CMS Medicare
- +3 more carriersWith a free account
Plan types Dr. Hu accepts, by number of carriers
- PPO7
- HMO6
- EPO4
- POS4
- Medicare3
Source: Dmand AI Insurance Network Data
Sources for Dr. Mary Y. Hu'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)Doctors and Clinicians Utilization Data (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. Mary Y. Hu
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. Mary Y. Hu's NPI number?
Dr. Mary Y. Hu's NPI number is 1659339059. It was assigned on May 3, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Mary Y. Hu?
Dr. Mary Y. Hu is a gastroenterologist in Fremont, California. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Mary Y. Hu practice?
Dr. Hu practices at 3120 Kearney Street, Fremont, CA 94538. Dr. Hu's primary practice is Surgery Center Fremont in Fremont, California. Dmand AI also links Dr. Hu to 1 group practice or clinic.
What is Dr. Mary Y. Hu's office phone number?
The practice phone on file for Dr. Hu is (510) 498-3600.
What is Dr. Mary Y. Hu's medical license number?
Dr. Hu holds California license A84011, one of the licenses on file in 2 states.
Which states has Dr. Mary Y. Hu been licensed in?
Dmand AI has state licenses on file for Dr. Hu in California (2003 to 2027) and Massachusetts (2005 to 2010).
Which hospitals is Dr. Mary Y. Hu affiliated with?
Dr. Hu is affiliated with Washington Health.
What medical group is Dr. Mary Y. Hu part of?
Dr. Hu is linked to Palo Alto Foundation Medical Group.
Does Dr. Mary Y. Hu accept Medicare?
Yes. CMS data shows Dr. Hu billed Medicare for 312 services in 2024, and Dr. Hu accepts Medicare assignment.
Does Dr. Mary Y. Hu offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Hu as offering telehealth services.
Show 10 more questionsShow fewer questions
How many Medicare patients does Dr. Mary Y. Hu see?
CMS counts 196 Medicare patients who saw Dr. Hu in 2024, with an average age of 75.
Is Dr. Mary Y. Hu board certified?
Yes. Dr. Hu is board certified in gastroenterology by the American Board of Internal Medicine.
What services does Dr. Mary Y. Hu bill to Medicare?
In 2024, Dr. Hu's most billed Medicare services were surgery: digestive system (45380), medicare service (G0500) and office visit, established patient (99215).
Where did Dr. Mary Y. Hu go to medical school?
Dr. Hu graduated from Harvard Medical School in 2002.
What drugs does Dr. Mary Y. Hu prescribe most?
In 2024 Medicare Part D data, Dr. Hu's most prescribed drugs by claims were Omeprazole, Sod Sulf-Potass Sulf-Mag Sulf and Famotidine.
Has Dr. Mary Y. Hu received payments from drug or device companies?
CMS Open Payments shows $778 in general payments to Dr. Hu from 13 companies from 2016 to 2025. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. Mary Y. Hu been practicing?
Dr. Hu graduated from medical school in 2002, 24 years ago.
Does Dr. Mary Y. Hu do research?
Dmand AI links 6 publications to Dr. Hu, published from 2008 to 2015.
Who does Dr. Mary Y. Hu publish with?
Dr. Hu's most frequent co-authors are Sarah Wilkins Flores, MD, MPH (1 shared paper), Daniel Alexander Leffler, MD (1 shared paper) and Alan John Martin, MD (1 shared paper).
What insurance does Dr. Mary Y. Hu accept?
Dr. Hu is in network with 11 carriers, including Aetna, Elevance and United Healthcare. PPO plans come from the most carriers, 7. Check the plan with the practice before a visit.
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