Dr. Spencer T. Fung, MD
- Part D claims, 2024
- 841
- Industry payments
- $126
- Affiliated sites
- 1
- Medical group
- 1
- Insurance carriers
- 2
- Practice address
- 710 Lawrence Expy, Santa Clara, CA 95051
- Practice phone
- Call (408) 851-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Permanente Medical Group Inc
Santa Clara, California
Find Dr. Fung'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. Spencer T. Fung is a gastroenterologist in Santa Clara, California
Dr. Fung practices at Permanente Medical Group Inc in Santa Clara, California.
Dr. Fung's NPI, 1669559506, was assigned on October 31, 2006. Dr. Fung graduated from UC San Diego School of Medicine in 1994. Dr. Fung holds California license A54635.
- NPI
- 1669559506NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0648455444
- NPI enumeration date
- October 31, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (408) 851-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 58
- Medical school graduation
- 1994
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Spencer T. Fung practices at Permanente Medical Group Inc in Santa Clara, California
Dr. Fung's primary practice is Permanente Medical Group Inc, at 710 Lawrence Expy, Santa Clara, CA 95051 in Santa Clara County. The practice phone is (408) 851-1000.
- Permanente Medical Group Inc710 Lawrence Expy, Santa Clara, CA 95051 · Santa Clara CountyPhone(408) 851-1000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Spencer T. Fung is affiliated with 2 sites of care and 1 medical group
Dr. Fung's primary practice is Permanente Medical Group Inc in Santa Clara, California. The medical group on file is The Permanente Medical Group, Inc. Dmand AI also links Dr. Fung to 1 more group practice or clinic, 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. Spencer T. Fung's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Fung practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Permanente Medical Group Inc | 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. Spencer T. Fung is one of 1,977 gastroenterologists in California
Gastroenterology is Dr. Fung's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Fung is board certified in gastroenterology by the American Board of Internal Medicine. Dmand AI has Dr. Fung's licenses on file in 2 states: California and Hawaii.
Specialties and state licenses
- Gastroenterology, CaliforniaPrimary
- Hawaii license
Clinical focus
Dmand AI lists chronic indigestion among the conditions Dr. Fung treats.
Gastroenterologists near Dr. Fung
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. Spencer T. Fung's patients have a median age of 63
Across all payers, Dmand AI patient panel data puts Dr. Fung's median patient age at 63, with 57% women.
Dr. Fung'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%
- Men42%
Source: Dmand AI Patient Panel Data
Dr. Spencer T. Fung wrote 841 Medicare Part D claims in 2024
In 2024, Dr. Fung wrote 841 Medicare Part D claims for 674 patients. 90% of them were for generic drugs. CMS names the drug for 732 of them, across 6 drugs with 11 or more claims each, at $48,884 in total drug cost. In 2023, CMS named 539 claims across 7 drugs.
Dr. Fung's Part D claims by kind of drug, 2024
- Generic756 claims90%
- Brand-name85 claims10%
Dr. Fung'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. Fung's Part D claims, 2024
- Antibiotics2%14 of 841 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: 5392024: 73236%
Drugs named by CMS: 6 in 2024, 7 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. Spencer T. Fung takes part in Medicare
Dr. Fung accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Upper gastrointestinal (GI) endoscopy for acid reflux: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Spencer T. Fung received $126 in industry payments from 2022 to 2024
CMS Open Payments shows 3 general payments to Dr. Fung from 2 drug and device companies from 2022 to 2024. Food and beverage make up the largest share, 100% of the total. Boston Scientific Corporation paid the most, $120.
General payments to Dr. Fung by program year, 2022 to 2024
Companies that paid Dr. Fung the most, 2022 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Spencer T. Fung has 2 awards and honors on record
Dmand AI lists 2 awards for Dr. Fung, most recently CMS Stage 1 2012 in 2011.
Awards and honors for Dr. Fung
- 2011
- CMS Stage 1 2012
- Undated
- Checkbook Top Doc
Source: Dmand AI Professional Profile Data
Dr. Spencer T. Fung graduated from UC San Diego School of Medicine
Dr. Fung graduated from UC San Diego School of Medicine in 1994.
- Medical school
- Board certified in gastroenterology
Source: Dmand AI Professional Profile Data
Dr. Spencer T. Fung accepts plans from 2 insurance carriers
Dr. Fung 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. Fung accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Spencer T. Fung'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 Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| 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) |
| Industry payments | Open Payments (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. Spencer T. Fung
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. Spencer T. Fung's NPI number?
Dr. Spencer T. Fung's NPI number is 1669559506. It was assigned on October 31, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Spencer T. Fung?
Dr. Spencer T. Fung is a gastroenterologist in Santa Clara, California. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Spencer T. Fung practice?
Dr. Fung practices at 710 Lawrence Expy, Santa Clara, CA 95051. Dr. Fung's primary practice is Permanente Medical Group Inc in Santa Clara, California. Dmand AI also links Dr. Fung to 1 group practice or clinic.
What is Dr. Spencer T. Fung's office phone number?
The practice phone on file for Dr. Fung is (408) 851-1000.
What is Dr. Spencer T. Fung's medical license number?
Dr. Fung holds California license A54635, one of the licenses on file in 2 states.
Which states has Dr. Spencer T. Fung been licensed in?
Dmand AI has state licenses on file for Dr. Fung in California (1995 to 2026) and Hawaii (1996).
What medical group is Dr. Spencer T. Fung part of?
Dr. Fung is linked to The Permanente Medical Group, Inc.
Does Dr. Spencer T. Fung accept Medicare?
Yes. CMS lists Dr. Fung as accepting Medicare assignment.
Is Dr. Spencer T. Fung board certified?
Yes. Dr. Fung is board certified in gastroenterology by the American Board of Internal Medicine.
Where did Dr. Spencer T. Fung go to medical school?
Dr. Fung graduated from UC San Diego School of Medicine in 1994.
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What drugs does Dr. Spencer T. Fung prescribe most?
In 2024 Medicare Part D data, Dr. Fung's most prescribed drugs by claims were Gavilyte-C, Budesonide DR and Pantoprazole Sodium.
Has Dr. Spencer T. Fung received payments from drug or device companies?
CMS Open Payments shows $126 in general payments to Dr. Fung from 2 companies from 2022 to 2024. The largest total came from Boston Scientific Corporation.
How long has Dr. Spencer T. Fung been practicing?
Dr. Fung graduated from medical school in 1994, 32 years ago.
What insurance does Dr. Spencer T. Fung accept?
Dr. Fung 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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