Am J Gastroenterol
alpha-FetoproteinsCarcinoma, HepatocellularDisease Progression
Dr. John C. Hoefs, MD
NPI1154425742
- Medicare services, 2024
- 120
- Medicare patients, 2024
- 103
- Part D claims, 2024
- 151
- Publications
- 45
- Clinical trials
- 1
- Practice address
- 250 Bon Air Rd, Greenbrae, CA 94904
- Practice phone
- Call (949) 748-7474
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Hoefs' 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. John C. Hoefs is a gastroenterologist in Greenbrae, California
Dr. Hoefs practices in Greenbrae, California.
Dr. Hoefs' NPI, 1154425742, was assigned on September 12, 2006. Dr. Hoefs graduated from George Washington University School of Medicine and Health Sciences in 1970. Dr. Hoefs holds California license 000000G26324.
NPI and contact details
- NPI
- 1154425742NPI Registry (opens in a new tab)
- NPI enumeration date
- September 12, 2006
- NPI status
- Active
- Practice phone
- (949) 748-7474
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 81
- Medical school graduation
- 1970
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dr. John C. Hoefs' practice address is in Greenbrae, California
Dr. Hoefs' practice address in the NPI Registry is 250 Bon Air Rd, Greenbrae, CA 94904, in Marin County. The practice phone is (949) 748-7474.
- NPI Registry address250 Bon Air Rd, Greenbrae, CA 94904 · Marin CountyPhone(949) 748-7474
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. John C. Hoefs' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hoefs practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dr. Hoefs' practice | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
See the EHR and IT leaders at every site where Dr. Hoefs practices
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. John C. Hoefs is one of 1,977 gastroenterologists in California
Gastroenterology is Dr. Hoefs' primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Hoefs is licensed in California.
Specialties and state licenses
- Gastroenterology, CaliforniaPrimary
Clinical focus
Dmand AI lists acid reflux, cirrhosis of the liver, fatty liver and hepatitis c among the conditions Dr. Hoefs treats.
Gastroenterologists near Dr. Hoefs
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. John C. Hoefs billed Medicare for 120 services in 2024
CMS data shows 120 Medicare services from Dr. Hoefs across 1 procedure code in 2024, all of them office visits, for 103 Medicare patients. Medicare paid $13,483 for them. Every service was in an office.
Medicare services, 2024120
Medicare patients103
Paid by Medicare$13,483
Procedure codes1
Dr. Hoefs' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3242024: 12063%
Dr. Hoefs compared with the California median for gastroenterologists, 2024
- Dr. Hoefs
- California median
- Medicare services
- 120vs 58680% below
- Medicare patients
- 103vs 30266% below
- Part D claims
- 96vs 38075% below
Medians across 1,875 gastroenterologists in California with Dmand AI profiles that report each measure.
Dr. Hoefs' 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.
Need commercial claims for Dr. Hoefs?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Hoefs and other gastroenterologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John C. Hoefs treated 103 Medicare patients in 2024, average age 74
CMS counts 103 Medicare patients who saw Dr. Hoefs in 2024. The largest group is 65 to 74, with 57 patients. 75% of them have high cholesterol, and 74% have diabetes. 18% are also on Medicaid. Their average risk score is 1.81, 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. Hoefs' median patient age at 63, with 80% women.
Medicare patients, 2024103
Average age74
Average risk score1.81
Also on Medicaid18%
Dr. Hoefs' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Hoefs' Medicare patients by sex, 2024
- Women5856%
- Men4544%
Chronic conditions among Dr. Hoefs' Medicare patients, 2024
- High cholesterol75%
- Diabetes74%
- High blood pressure73%
- Arthritis60%
- Chronic kidney disease33%
- Ischemic heart disease31%
- Anxiety29%
- Mood disorders27%
Share of Medicare patients with each condition. A patient can have several.
Dr. Hoefs' 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
- Women80%
- Men20%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John C. Hoefs wrote 151 Medicare Part D claims in 2024
In 2024, Dr. Hoefs wrote 151 Medicare Part D claims for 46 patients. 70% of them were for generic drugs. CMS names the drug for 96 of them, across 5 drugs with 11 or more claims each, at $94,736 in total drug cost. In 2023, CMS named 229 claims across 9 drugs.
Part D claims, 2024151
Drugs named by CMS5
Total drug cost$94,736
Part D patients46
Dr. Hoefs' Part D claims by kind of drug, 2024
- Generic106 claims70%
- Brand-name45 claims30%
Dr. Hoefs' 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. Hoefs' Part D claims, 2024
- Antibiotics9%13 of 151 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: 2292024: 9658%
Drugs named by CMS: 5 in 2024, 9 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
For MedTech and pharma teams
Find gastroenterologists like Dr. Hoefs by procedure volume and prescribing
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. John C. Hoefs has 45 publications on record
Dmand AI links 45 papers to Dr. Hoefs, published from 2008 to 2011. 2008 was the busiest year, with 2. The most frequent topics are Liver Cirrhosis, Liver and Antiviral Agents. Dr. Hoefs has published most often in Hepatology. Dr. Hoefs' most frequent co-authors are Timothy R. Morgan, MD, Gary Craig Kanel, MD and William Martens Lee, MD.
Papers45
Years published2008 to 2011
Dr. Hoefs' papers by year, 2008 to 2011
Topics Dr. Hoefs writes about most
- Liver Cirrhosis
- Liver
- Antiviral Agents
- Hepatitis C, Chronic
- Interferon-alpha
- Liver Function Tests
- Recombinant Proteins
- Interferon alpha-2
Dr. Hoefs' most frequent co-authors
- Timothy R. Morgan, MD9 shared papers
- Gary Craig Kanel, MD8 shared papers
- William Martens Lee, MD4 shared papers
Recent publications by Dr. Hoefs
Gastroenterology
Antiviral AgentsBiopsyCarcinoma, Hepatocellular
Gastroenterology
Antiviral AgentsCarcinoma, HepatocellularDisease Progression
Aliment Pharmacol Ther
Antiviral AgentsHepatitis C, ChronicInterferons
Aliment Pharmacol Ther
Antiviral AgentsHepatitis C, ChronicLiver Cirrhosis
See who Dr. Hoefs researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Hoefs 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. John C. Hoefs has worked on 1 clinical trial
Dmand AI links Dr. Hoefs to 1 clinical trial. Conditions studied include Hepatitis C and Flaviviridae Infections.
Conditions in Dr. Hoefs' trials
- Hepatitis C
- Flaviviridae Infections
Recent clinical trials with Dr. Hoefs
Liver Cancer Prevention Trial in Patients With Chronic Hep C Infection (opens in a new tab)
CompletedPhase 2
Hepatitis CFlaviviridae InfectionsS-adenosyl-L-methionine disulfate p-toluene-sulfonate
Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)
Dr. John C. Hoefs received $59,992 in industry payments from 2016 to 2023
CMS Open Payments shows 105 general payments to Dr. Hoefs from 5 drug and device companies from 2016 to 2023. Speaker and faculty fees make up the largest share, 72% of the total. Gilead Sciences, Inc. paid the most, $59,230.
General payments to Dr. Hoefs by program year, 2016 to 2023
General payments to Dr. Hoefs by kind, 2016 to 2023
$60Kin total
- Speaker and faculty fees$43,37072%
- Consulting fees$8,45014%
- Travel and lodging$4,9918%
- Food and beverage$3,1815%
Companies that paid Dr. Hoefs 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. John C. Hoefs has 1 award and honors on record
Dmand AI lists 1 award for Dr. Hoefs.
Awards and honors for Dr. Hoefs
- Undated
- Super Doc
Source: Dmand AI Professional Profile Data
Dr. John C. Hoefs graduated from George Washington University School of Medicine and Health Sciences
Dr. Hoefs graduated from George Washington University School of Medicine and Health Sciences in 1970.
- Medical school
Source: Dmand AI Professional Profile Data
Dr. John C. Hoefs accepts plans from 3 insurance carriers
Dr. Hoefs is in network with 3 carriers, including Blue Cross Blue Shield of Michigan, Elevance and HCSC. HMO plans come from the most carriers, 2. Check the plan with the practice before a visit.
- Blue Cross Blue Shield of Michigan
- Elevance
- HCSC
Plan types Dr. Hoefs accepts, by number of carriers
- HMO2
- Medicare2
- PPO2
- Medicaid1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. John C. Hoefs'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 |
| 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Clinical trials and co-investigators | Dmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (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. John C. Hoefs
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. John C. Hoefs' NPI number?
Dr. John C. Hoefs' NPI number is 1154425742. It was assigned on September 12, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John C. Hoefs?
Dr. John C. Hoefs is a gastroenterologist in Greenbrae, California. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. John C. Hoefs practice?
Dr. Hoefs practices at 250 Bon Air Rd, Greenbrae, CA 94904.
What is Dr. John C. Hoefs' office phone number?
The practice phone on file for Dr. Hoefs is (949) 748-7474.
What is Dr. John C. Hoefs' medical license number?
Dr. Hoefs holds California license 000000G26324.
Does Dr. John C. Hoefs accept Medicare?
Yes. CMS data shows Dr. Hoefs billed Medicare for 120 services in 2024.
How many Medicare patients does Dr. John C. Hoefs see?
CMS counts 103 Medicare patients who saw Dr. Hoefs in 2024, with an average age of 74.
What services does Dr. John C. Hoefs bill to Medicare?
In 2024, Dr. Hoefs' most billed Medicare services were office visit, established patient (99215).
Where did Dr. John C. Hoefs go to medical school?
Dr. Hoefs graduated from George Washington University School of Medicine and Health Sciences in 1970.
What drugs does Dr. John C. Hoefs prescribe most?
In 2024 Medicare Part D data, Dr. Hoefs' most prescribed drugs by claims were Ursodiol, Vemlidy and Tenofovir Disoproxil Fumarate.
Show 5 more questionsShow fewer questions
Has Dr. John C. Hoefs received payments from drug or device companies?
CMS Open Payments shows $59,992 in general payments to Dr. Hoefs from 5 companies from 2016 to 2023. The largest total came from Gilead Sciences, Inc.
How long has Dr. John C. Hoefs been practicing?
Dr. Hoefs graduated from medical school in 1970, 56 years ago.
Does Dr. John C. Hoefs do research?
Dmand AI links 45 publications to Dr. Hoefs, published from 2008 to 2011. Dr. Hoefs has worked on 1 clinical trial.
Who does Dr. John C. Hoefs publish with?
Dr. Hoefs' most frequent co-authors are Timothy R. Morgan, MD (9 shared papers), Gary Craig Kanel, MD (8 shared papers) and William Martens Lee, MD (4 shared papers).
What insurance does Dr. John C. Hoefs accept?
Dr. Hoefs is in network with 3 carriers, including Blue Cross Blue Shield of Michigan, Elevance and HCSC. HMO plans come from the most carriers, 2. Check the plan with the practice before a visit.
Selling to gastroenterology practices?
See gastroenterologists in California by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card