Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Jennifer Ellen Guy, MD

Individual provider Gastroenterology Physician · NPI 1710137872

Jennifer Ellen Guy, MD practises Gastroenterology in San Francisco, California. Qualified in 2002, 24 years ago. Practices with Sutter Bay Medical Foundation, a 3,762-clinician group, works from 3 locations, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
24
Licensed in
CA
In the registry since
2008
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1100 Van Ness Ave
San Francisco, CA 94109-6978
Phone: (415) 600-1000
Fax: (415) 558-7051
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 701 E El Camino Real, Mountain View, CA 94040-2833 — (415) 600-1000
  • 3300 Webster St Ste 202, Oakland, CA 94609-3120 — (510) 208-1777

Specialties & licences

Transplant Hepatology Physician (primary) Taxonomy 207RT0003X · Licence A86055 (CA)
Gastroenterology Physician Taxonomy 207RG0100X · Licence A86055 (CA)
Hepatology Physician Taxonomy 207RI0008X · Licence A86055 (CA)

Record details

NPI number1710137872
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 25, 2008
Last updated in NPPESNovember 16, 2020
Certification dateNovember 16, 2020

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyGASTROENTEROLOGY
Medical schoolOTHER
Graduated 2002 (24 years in practice)
Group practice Sutter Bay Medical Foundation — 3762 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations7 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Upper gastrointestinal (GI) endoscopy for acid reflux 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients253
Services billed 657 a service is one billed item, such as a visit, a test or a procedure
Average patient age70

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Sutter Bay Medical Foundation

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 3762 clinicians in the practice; 12 are shown here.

Other providers in San Francisco