Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Fred Guo Karaisz, MD

Individual provider Internal Medicine Physician · NPI 1386209161

Dr. Fred Guo Karaisz, MD practises Gastroenterology in Saint Louis, Missouri. Graduated from Pennsylvania State University College of Medicine in 2019, 7 years ago. Practices with Washington University, a 2,986-clinician group and accepts Medicare assignment. Licensed in Missouri.

Years since qualifying
7
Trained at
Pennsylvania State University College of Medicine
Licensed in
MO
In the registry since
2019
Specialties on file
2
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

1 Barnes Jewish Hospital Plz Div Im Gastroenterology
Saint Louis, MO 63110-1003
Phone: (314) 747-2066
Fax: (314) 362-2357
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 2025017760 (MO)
Internal Medicine Physician Taxonomy 207R00000X · Licence 2025017760 (MO)

Record details

NPI number1386209161
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 7, 2019
Last updated in NPPESJuly 18, 2025
Certification dateMay 30, 2025

Medicare enrollment

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

Medicare specialtyGASTROENTEROLOGY
Also practisesINTERNAL MEDICINE
Medical schoolPENNSYLVANIA STATE UNIVERSITY COLLEGE OF MEDICINE
Graduated 2019 (7 years in practice)
Group practice Washington University — 2986 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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 29 times · 55th percentile
Colonoscopy 19 times · 47th percentile

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.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Grant $12,500 1 payment · funding for a project or programme, not a fee for the clinician’s time
Travel and Lodging $1,481 6 payments · travel or lodging paid or reimbursed, such as to attend a conference
Food and Beverage $777 6 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Washington University

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2986 clinicians in the practice; 12 are shown here.

Other providers in Saint Louis