Dr. Mitchell F. Fung, MD
- Medicare services, 2019
- 22
- Part D claims, 2024
- 3,515
- Hospital affiliations
- 1
- Industry payments
- $1,109
- Medical group
- 1
- Practice address
- 7373 West Ln, Stockton, CA 95210
- Practice phone
- Call (209) 476-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Permanente Medical Group Inc
Stockton, 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. Mitchell F. Fung is a rheumatologist in Stockton, California
Dr. Fung practices at Permanente Medical Group Inc in Stockton, California.
Dr. Fung's NPI, 1205986015, was assigned on January 12, 2007. Dr. Fung graduated from George Washington University School of Medicine and Health Sciences in 1989. Dr. Fung holds California license G71321.
- NPI
- 1205986015NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0042491490
- NPI enumeration date
- January 12, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (209) 476-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 63
- Medical school graduation
- 1989
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mitchell F. Fung practices at Permanente Medical Group Inc in Stockton, California
Dr. Fung's primary practice is Permanente Medical Group Inc, at 7373 West Ln, Stockton, CA 95210 in San Joaquin County. The practice phone is (209) 476-2000.
- Permanente Medical Group Inc7373 West Ln, Stockton, CA 95210 · San Joaquin CountyPhone(209) 476-2000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Mitchell F. Fung is affiliated with 2 sites of care and 1 medical group
Dr. Fung's primary practice is Permanente Medical Group Inc in Stockton, California. Dr. Fung is also affiliated with Kaiser Permanente Fresno Medical Center. The medical group on file is The Permanente Medical Group, Inc.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Mitchell F. 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. Mitchell F. Fung is one of 821 rheumatologists in California
Rheumatology is Dr. Fung's primary specialty in the NPI Registry, under taxonomy code 207RR0500X. Dr. Fung is board certified in rheumatology by the American Board of Internal Medicine. Dr. Fung is licensed in California.
Specialties and state licenses
- Rheumatology, CaliforniaPrimary
Clinical focus
Dmand AI lists arteritis, lupus and rheumatoid arthritis among the conditions Dr. Fung treats.
Rheumatologists near Dr. Fung
Counts of rheumatologists 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. Mitchell F. Fung billed Medicare for 22 services in 2019
CMS data shows 22 Medicare services from Dr. Fung across 1 procedure code in 2019, all of them office visits. Medicare paid $868 for them. Every service was in an office.
Dr. Fung's Medicare services by type, 2018 to 2019
- 2018
- 2019
- Office and hospital visits
- 2018: 202019: 2210%
Dr. Fung compared with the California median for rheumatologists, 2019
- Dr. Fung
- California median
- Medicare services
- 22vs 90098% below
- Part D claims
- 3,341vs 9623.5 times
Medians across 773 rheumatologists in California with Dmand AI profiles that report each measure.
Dr. Fung's most billed Medicare procedure codes, 2019
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Fung?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Fung and other rheumatologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mitchell F. Fung's patients have a median age of 64
Across all payers, Dmand AI patient panel data puts Dr. Fung's median patient age at 64, with 81% 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 64
Patient panel by sex, all payers
- Women81%
- Men19%
Source: Dmand AI Patient Panel Data
Dr. Mitchell F. Fung wrote 3,515 Medicare Part D claims in 2024
In 2024, Dr. Fung wrote 3,515 Medicare Part D claims for 644 patients. 82% of them were for generic drugs. CMS names the drug for 3,341 of them, across 31 drugs with 11 or more claims each, at $1,654,270 in total drug cost. In 2023, CMS named 3,219 claims across 32 drugs.
Dr. Fung's Part D claims by kind of drug, 2024
- Generic2,887 claims82%
- Brand-name and other628 claims18%
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
- Opioids3%118 of 3,515 claims
- Antibiotics3%95 of 3,515 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: 3,2192024: 3,3414%
Drugs named by CMS: 31 in 2024, 32 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. Mitchell F. Fung offers telehealth to Medicare patients
Dr. Fung accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Fung as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Mitchell F. Fung received $1,109 in industry payments from 2016 to 2023
CMS Open Payments shows 12 general payments to Dr. Fung from 6 drug and device companies from 2016 to 2023. Food and beverage make up the largest share, 80% of the total. Celgene Corporation paid the most, $375.
General payments to Dr. Fung by program year, 2016 to 2023
General payments to Dr. Fung by kind, 2016 to 2023
- Food and beverage$88980%
- Consulting fees$22020%
Companies that paid Dr. Fung the most, 2016 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Mitchell F. 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
- ACR Fellow
Source: Dmand AI Professional Profile Data
Dr. Mitchell F. Fung graduated from George Washington University School of Medicine and Health Sciences
Dr. Fung graduated from George Washington University School of Medicine and Health Sciences in 1989.
- Medical school
- Board certified in rheumatology
Source: Dmand AI Professional Profile Data
Dr. Mitchell F. 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. Mitchell F. 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 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 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) |
| 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. Mitchell F. 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. Mitchell F. Fung's NPI number?
Dr. Mitchell F. Fung's NPI number is 1205986015. It was assigned on January 12, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Mitchell F. Fung?
Dr. Mitchell F. Fung is a rheumatologist in Stockton, California. The primary specialty in the NPI Registry is Rheumatology Physician (taxonomy code 207RR0500X).
Where does Dr. Mitchell F. Fung practice?
Dr. Fung practices at 7373 West Ln, Stockton, CA 95210. Dr. Fung's primary practice is Permanente Medical Group Inc in Stockton, California.
What is Dr. Mitchell F. Fung's office phone number?
The practice phone on file for Dr. Fung is (209) 476-2000.
What is Dr. Mitchell F. Fung's medical license number?
Dr. Fung holds California license G71321.
Which hospitals is Dr. Mitchell F. Fung affiliated with?
Dr. Fung is affiliated with Kaiser Permanente Fresno Medical Center.
What medical group is Dr. Mitchell F. Fung part of?
Dr. Fung is linked to The Permanente Medical Group, Inc.
Does Dr. Mitchell F. Fung accept Medicare?
Yes. CMS data shows Dr. Fung billed Medicare for 22 services in 2019, and Dr. Fung accepts Medicare assignment.
Does Dr. Mitchell F. Fung offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Fung as offering telehealth services.
Is Dr. Mitchell F. Fung board certified?
Yes. Dr. Fung is board certified in rheumatology by the American Board of Internal Medicine.
Show 6 more questionsShow fewer questions
What services does Dr. Mitchell F. Fung bill to Medicare?
In 2019, Dr. Fung's most billed Medicare services were office visit, established patient (99213).
Where did Dr. Mitchell F. Fung go to medical school?
Dr. Fung graduated from George Washington University School of Medicine and Health Sciences in 1989.
What drugs does Dr. Mitchell F. Fung prescribe most?
In 2024 Medicare Part D data, Dr. Fung's most prescribed drugs by claims were Prednisone, Methotrexate and Hydroxychloroquine Sulfate.
Has Dr. Mitchell F. Fung received payments from drug or device companies?
CMS Open Payments shows $1,109 in general payments to Dr. Fung from 6 companies from 2016 to 2023. The largest total came from Celgene Corporation.
How long has Dr. Mitchell F. Fung been practicing?
Dr. Fung graduated from medical school in 1989, 37 years ago.
What insurance does Dr. Mitchell F. 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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