Dr. Jennifer Ellen Guy, MD
- Medicare services, 2024
- 620
- Medicare patients, 2024
- 253
- Part D claims, 2024
- 1,038
- Publications
- 17
- Hospital affiliations
- 5
- Practice address
- 2333 Buchanan St, San Francisco, CA 94115
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
California Pacific Medical Center - B.H. Cancer Care Center-Buchanan St - HOPD
Acute Care Hospital outpatient department · San Francisco, California
Find Dr. Guy'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. Jennifer Ellen Guy is a transplant hepatology physician in San Francisco, California
Dr. Guy practices at California Pacific Medical Center - B.H. Cancer Care Center-Buchanan St - HOPD in San Francisco, California.
Dr. Guy's NPI, 1710137872, was assigned on September 25, 2008. Dr. Guy graduated from UCSF School of Medicine in 2002. Dr. Guy holds California license A86055.
- NPI
- 1710137872NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9335291640
- NPI enumeration date
- September 25, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- 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. Jennifer Ellen Guy practices at California Pacific Medical Center - B.H. Cancer Care Center-Buchanan St - HOPD in San Francisco, California
Dr. Guy's primary practice is California Pacific Medical Center - B.H. Cancer Care Center-Buchanan St - HOPD, at 2333 Buchanan St, San Francisco, CA 94115.
- California Pacific Medical Center - B.H. Cancer Care Center-Buchanan St - HOPD2333 Buchanan St, San Francisco, CA 94115
Source: Dmand AI Affiliation Data
Dr. Jennifer Ellen Guy is affiliated with 7 sites of care and 1 medical group
Dr. Guy's primary practice is California Pacific Medical Center - B.H. Cancer Care Center-Buchanan St - HOPD in San Francisco, California. Dr. Guy is also affiliated with California Pacific Medical Center Van Ness Campus. The medical group on file is Palo Alto Foundation Medical Group. Dmand AI also links Dr. Guy to 4 more hospitals and 1 group practice or clinic, each named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Jennifer Ellen Guy's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Guy practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| California Pacific Medical Center - B.H. Cancer Care Center-Buchanan St - HOPD | Available with a free account |
| +6 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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. Jennifer Ellen Guy is one of 41 transplant hepatology physicians in California
Transplant hepatology is Dr. Guy's primary specialty in the NPI Registry, under taxonomy code 207RT0003X. Dr. Guy is board certified in gastroenterology by the American Board of Internal Medicine. Dr. Guy is licensed in California.
Specialties and state licenses
- Transplant hepatology, CaliforniaPrimary
Clinical focus
Dmand AI lists cirrhosis of the liver, fatty liver and upper GI endoscopy among the conditions Dr. Guy treats.
Transplant hepatology physicians near Dr. Guy
Counts of transplant hepatology physicians 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. Jennifer Ellen Guy billed Medicare for 620 services in 2024
CMS data shows 620 Medicare services from Dr. Guy across 7 procedure codes in 2024, for 253 Medicare patients. Medicare paid $69,993 for them.
Dr. Guy's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4952024: 62025%
Where Dr. Guy's Medicare services took place, 2024
- In an office244%
- In a facility59696%
Dr. Guy compared with the California median for transplant hepatology physicians, 2024
- Dr. Guy
- California median
- Medicare services
- 620vs 49625% above
- Medicare patients
- 253vs 22811% above
- Part D claims
- 845vs 3582.4 times
Medians across 39 transplant hepatology physicians in California with Dmand AI profiles that report each measure.
Dr. Guy'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.
Need commercial claims for Dr. Guy?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Guy and other transplant hepatology physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Jennifer Ellen Guy treated 253 Medicare patients in 2024, average age 70
CMS counts 253 Medicare patients who saw Dr. Guy in 2024. The largest group is 65 to 74, with 143 patients. 75% of them have high blood pressure, and 62% have high cholesterol. 42% are also on Medicaid. Their average risk score is 2.46, 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. Guy's median patient age at 64, with 48% women.
Dr. Guy's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Guy's Medicare patients by sex, 2024
- Women10441%
- Men14959%
Chronic conditions among Dr. Guy's Medicare patients, 2024
- High blood pressure75%
- High cholesterol62%
- Chronic kidney disease46%
- Diabetes46%
- Arthritis40%
- Alcohol and drug use disorders33%
- Mood disorders30%
- Depression28%
Share of Medicare patients with each condition. A patient can have several.
Dr. Guy'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
- Women48%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Jennifer Ellen Guy wrote 1,038 Medicare Part D claims in 2024
In 2024, Dr. Guy wrote 1,038 Medicare Part D claims for 138 patients. 77% of them were for generic drugs. CMS names the drug for 845 of them, across 23 drugs with 11 or more claims each, at $793,571 in total drug cost. In 2023, CMS named 744 claims across 22 drugs.
Dr. Guy's Part D claims by kind of drug, 2024
- Generic798 claims77%
- Brand-name and other240 claims23%
Dr. Guy'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. Guy's Part D claims, 2024
- Opioids3%27 of 1,038 claims
- Antibiotics13%134 of 1,038 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: 7442024: 84514%
Drugs named by CMS: 23 in 2024, 22 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. Jennifer Ellen Guy offers telehealth to Medicare patients
Dr. Guy accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Guy as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- 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)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Jennifer Ellen Guy has 17 publications on record
Dmand AI links 17 papers to Dr. Guy, published from 2009 to 2024. 2013 was the busiest year, with 2. The most frequent topics are Carcinoma, Hepatocellular, Liver Neoplasms and Liver Transplantation. Dr. Guy has published most often in Clin Gastroenterol Hepatol. Dr. Guy's most frequent co-authors are Catherine Therese Frenette, MD, Francis Yung-Kang Yao, MD and Sander S. Florman, MD.
Dr. Guy's papers by year, 2009 to 2024
Topics Dr. Guy writes about most
- Carcinoma, Hepatocellular
- Liver Neoplasms
- Liver Transplantation
- Chemoembolization, Therapeutic
- Hepatitis B
- Liver Failure
Dr. Guy's most frequent co-authors
- Catherine Therese Frenette, MD4 shared papers
- Francis Yung-Kang Yao, MD3 shared papers
- Sander S. Florman, MD2 shared papers
Recent publications by Dr. Guy
See who Dr. Guy researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Guy works with, so you can find a warm path to the right transplant hepatology physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Jennifer Ellen Guy received $409 in industry payments from 2016 to 2024
CMS Open Payments shows 6 general payments to Dr. Guy from 4 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 100% of the total. Gilead Sciences, Inc. paid the most, $222.
General payments to Dr. Guy by program year, 2016 to 2024
Companies that paid Dr. Guy the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Jennifer Ellen Guy graduated from UCSF School of Medicine
Dr. Guy graduated from UCSF School of Medicine in 2002.
- Medical school
- Board certified in gastroenterology
Source: Dmand AI Professional Profile Data
Dr. Jennifer Ellen Guy accepts plans from 9 insurance carriers
Dr. Guy is in network with 9 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Blue Cross Blue Shield of Massachusetts
- Regence Health Plans
- Blue Cross and Blue Shield of Kansas City
- CMS Medicare
- +1 more carriersWith a free account
Plan types Dr. Guy accepts, by number of carriers
- Medicare7
- PPO6
- HMO4
- POS4
- EPO3
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Dr. Jennifer Ellen Guy'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 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. Jennifer Ellen Guy
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. Jennifer Ellen Guy's NPI number?
Dr. Jennifer Ellen Guy's NPI number is 1710137872. It was assigned on September 25, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Jennifer Ellen Guy?
Dr. Jennifer Ellen Guy is a transplant hepatology physician in San Francisco, California. The primary specialty in the NPI Registry is Transplant Hepatology Physician (taxonomy code 207RT0003X).
Where does Dr. Jennifer Ellen Guy practice?
Dr. Guy practices at 2333 Buchanan St, San Francisco, CA 94115. Dr. Guy's primary practice is California Pacific Medical Center - B.H. Cancer Care Center-Buchanan St - HOPD in San Francisco, California. Dmand AI also links Dr. Guy to 4 hospitals and 1 group practice or clinic.
What is Dr. Jennifer Ellen Guy's medical license number?
Dr. Guy holds California license A86055.
Which hospitals is Dr. Jennifer Ellen Guy affiliated with?
Dr. Guy is affiliated with California Pacific Medical Center Van Ness Campus. Dmand AI links Dr. Guy to 4 more hospitals.
What medical group is Dr. Jennifer Ellen Guy part of?
Dr. Guy is linked to Palo Alto Foundation Medical Group.
Does Dr. Jennifer Ellen Guy accept Medicare?
Yes. CMS data shows Dr. Guy billed Medicare for 620 services in 2024, and Dr. Guy accepts Medicare assignment.
Does Dr. Jennifer Ellen Guy offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Guy as offering telehealth services.
How many Medicare patients does Dr. Jennifer Ellen Guy see?
CMS counts 253 Medicare patients who saw Dr. Guy in 2024, with an average age of 70.
Is Dr. Jennifer Ellen Guy board certified?
Yes. Dr. Guy is board certified in gastroenterology by the American Board of Internal Medicine.
Show 8 more questionsShow fewer questions
What services does Dr. Jennifer Ellen Guy bill to Medicare?
In 2024, Dr. Guy's most billed Medicare services were office visit, established patient (99215), hospital inpatient care (99233) and office visit, established patient (99214).
Where did Dr. Jennifer Ellen Guy go to medical school?
Dr. Guy graduated from UCSF School of Medicine in 2002.
What drugs does Dr. Jennifer Ellen Guy prescribe most?
In 2024 Medicare Part D data, Dr. Guy's most prescribed drugs by claims were Tacrolimus, Xifaxan and Entecavir.
Has Dr. Jennifer Ellen Guy received payments from drug or device companies?
CMS Open Payments shows $409 in general payments to Dr. Guy from 4 companies from 2016 to 2024. The largest total came from Gilead Sciences, Inc.
How long has Dr. Jennifer Ellen Guy been practicing?
Dr. Guy graduated from medical school in 2002, 24 years ago.
Does Dr. Jennifer Ellen Guy do research?
Dmand AI links 17 publications to Dr. Guy, published from 2009 to 2024.
Who does Dr. Jennifer Ellen Guy publish with?
Dr. Guy's most frequent co-authors are Catherine Therese Frenette, MD (4 shared papers), Francis Yung-Kang Yao, MD (3 shared papers) and Sander S. Florman, MD (2 shared papers).
What insurance does Dr. Jennifer Ellen Guy accept?
Dr. Guy is in network with 9 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
Selling to transplant hepatology practices?
See transplant hepatology physicians 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