Dr. Fred Guo Karaisz, MD
- Part D claims, 2024
- 129
- Hospital affiliations
- 2
- Industry payments
- $14,849
- Medical group
- 1
- State license
- 1
- Practice address
- One Barnes-Jewish Hospital Plaza, Saint Louis, MO 63110
- Practice phone
- Call (314) 747-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Karaisz'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. Fred Guo Karaisz is a gastroenterologist in Saint Louis, Missouri
Dr. Karaisz practices at Barnes-Jewish Hospital in Saint Louis, Missouri, part of BJC Health.
Dr. Karaisz's NPI, 1386209161, was assigned on May 7, 2019. Dr. Karaisz graduated from Pennsylvania State University College of Medicine in 2019. Dr. Karaisz holds Missouri license 2025017760.
- NPI
- 1386209161NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5294068003
- NPI enumeration date
- May 7, 2019
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (314) 747-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 33
- Medical school graduation
- 2019
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Fred Guo Karaisz practices at 2 locations in Saint Louis, Missouri
Dr. Karaisz's primary practice is Barnes-Jewish Hospital, at One Barnes-Jewish Hospital Plaza, Saint Louis, MO 63110 in St. Louis City. The practice phone is (314) 747-3000. Dr. Karaisz also practices at Barnes-Jewish Hospital, 1 Barnes Jewish Hospital Plz, Saint Louis, MO 63110.
- Barnes-Jewish HospitalPrimaryOne Barnes-Jewish Hospital Plaza, Saint Louis, MO 63110 · St. Louis CityPhone(314) 747-3000
- Barnes-Jewish Hospital1 Barnes Jewish Hospital Plz, Saint Louis, MO 63110 · Saint Louis CityPhone(314) 747-3000
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; and Dmand AI Practice Data
Dr. Fred Guo Karaisz is affiliated with 2 sites of care and 1 medical group
Dr. Karaisz's primary practice is Barnes-Jewish Hospital in Saint Louis, Missouri, part of BJC Health. Dr. Karaisz is also affiliated with Barnes-Jewish West County Hospital. The medical group on file is WashU Medicine Psychiatry.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Fred Guo Karaisz's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Karaisz practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Barnes-Jewish Hospital | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Fred Guo Karaisz is one of 329 gastroenterologists in Missouri
Gastroenterology is Dr. Karaisz's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Karaisz is licensed in Missouri.
Specialties and state licenses
- Gastroenterology, MissouriPrimary
Gastroenterologists near Dr. Karaisz
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. Fred Guo Karaisz's patients have a median age of 67
Across all payers, Dmand AI patient panel data puts Dr. Karaisz's median patient age at 67, with 47% women.
Dr. Karaisz's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 67
Patient panel by sex, all payers
- Women47%
- Men52%
Source: Dmand AI Patient Panel Data
Dr. Fred Guo Karaisz wrote 129 Medicare Part D claims in 2024
In 2024, Dr. Karaisz wrote 129 Medicare Part D claims for 29 patients. 84% of them were for generic drugs. CMS names the drug for 99 of them, across 5 drugs with 11 or more claims each, at $6,075 in total drug cost.
Dr. Karaisz's Part D claims by kind of drug, 2024
- Generic108 claims84%
- Brand-name21 claims16%
Dr. Karaisz'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.
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. Fred Guo Karaisz ranks in the 56th percentile for upper gastrointestinal (gi) endoscopy for acid reflux in Medicare
Dr. Karaisz accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 31 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Dr. Karaisz, more than 56% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Karaisz ranks in Medicare procedure volume
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 56th percentile31 procedures
- Colonoscopy
- 48th percentile21 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Fred Guo Karaisz received $14,849 in industry payments from 2024 to 2025
CMS Open Payments shows 14 general payments to Dr. Karaisz from 4 drug and device companies from 2024 to 2025. Grants make up the largest share, 84% of the total. Boston Scientific Corporation paid the most, $13,754.
General payments to Dr. Karaisz by program year, 2024 to 2025
General payments to Dr. Karaisz by kind, 2024 to 2025
- Grants$12,50084%
- Travel and lodging$1,48110%
- Food and beverage$8676%
Companies that paid Dr. Karaisz the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Fred Guo Karaisz graduated from Pennsylvania State University College of Medicine
Dr. Karaisz graduated from Pennsylvania State University College of Medicine in 2019.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Fred Guo Karaisz'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 Affiliation DataDmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| 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)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile 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. Fred Guo Karaisz
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. Fred Guo Karaisz's NPI number?
Dr. Fred Guo Karaisz's NPI number is 1386209161. It was assigned on May 7, 2019, and it is active in the NPI Registry.
What kind of doctor is Dr. Fred Guo Karaisz?
Dr. Fred Guo Karaisz is a gastroenterologist in Saint Louis, Missouri. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Fred Guo Karaisz practice?
Dr. Karaisz practices at One Barnes-Jewish Hospital Plaza, Saint Louis, MO 63110. Dr. Karaisz also practices at 1 Barnes Jewish Hospital Plz, Saint Louis, MO 63110. Dr. Karaisz's primary practice is Barnes-Jewish Hospital in Saint Louis, Missouri, part of BJC Health.
What is Dr. Fred Guo Karaisz's office phone number?
The practice phone on file for Dr. Karaisz is (314) 747-3000.
What is Dr. Fred Guo Karaisz's medical license number?
Dr. Karaisz holds Missouri license 2025017760.
Which hospitals is Dr. Fred Guo Karaisz affiliated with?
Dr. Karaisz practices at Barnes-Jewish Hospital in Saint Louis, Missouri. Dr. Karaisz is also affiliated with Barnes-Jewish West County Hospital.
What medical group is Dr. Fred Guo Karaisz part of?
Dr. Karaisz is linked to WashU Medicine Psychiatry.
Does Dr. Fred Guo Karaisz accept Medicare?
Yes. CMS lists Dr. Karaisz as accepting Medicare assignment.
Where did Dr. Fred Guo Karaisz go to medical school?
Dr. Karaisz graduated from Pennsylvania State University College of Medicine in 2019.
What drugs does Dr. Fred Guo Karaisz prescribe most?
In 2024 Medicare Part D data, Dr. Karaisz's most prescribed drugs by claims were Pantoprazole Sodium, Omeprazole and Famotidine.
Has Dr. Fred Guo Karaisz received payments from drug or device companies?
CMS Open Payments shows $14,849 in general payments to Dr. Karaisz from 4 companies from 2024 to 2025. The largest total came from Boston Scientific Corporation.
How long has Dr. Fred Guo Karaisz been practicing?
Dr. Karaisz graduated from medical school in 2019, 7 years ago.
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