Physician Profile
Cassandra D. Fritz, MD
Unclaimed ProfileAbout Dr. Fritz
Based in Saint Louis, MO, Cassandra D. Fritz, MD is listed in the NPI registry under gastroenterology. Cassandra graduated from University of Chicago, Pritzker School of Medicine in 2015. Medicare claims data shows Cassandra provided 245 services to 232 patients. The services billed most often include initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes, subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes, and biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope. NPI 1821470287 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (314) 747-2066
- Email not available
Practice Locations
1 BARNES JEWISH HOSPITAL PLZ DIV IM GASTROENTEROLOGY
Saint Louis, MO 63110
Conditions Commonly Evaluated or Treated
Within Gastroenterology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
- Acid reflux
- Celiac disease
- Crohn's disease
- Hemorrhoids
- IBS
- Swallowing difficulties
- Ulcerative colitis
Biliary and pancreas
Colon and anorectal
Esophagus and swallowing
Functional bowel and motility
Liver
- Ascites
- Autoimmune hepatitis
- Cirrhosis
- Fatty liver disease
- Hemochromatosis
- Hepatitis B
- Hepatitis C
- Portal hypertension
Stomach and duodenum
Bowel & Colon
Digestive Symptoms
Gallbladder & Bile Ducts
Procedures & services
Most searched procedures
Lower endoscopy
Upper endoscopy
Capsule and physiology testing
Diagnostic Testing
Liver procedures
Treatments
Procedures Most Often Billed to Medicare
245 services · 232 patients · 7 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43239 |
28 | Less often than most peers in Gastroenterology |
| Biopsy of large bowel using a flexible endoscope | Procedure | 45380 |
24 | Less often than most peers in Gastroenterology |
| Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43235 |
18 | As often as other peers in Gastroenterology |
| Control of bleeding of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43255 |
15 | As often as other peers in Gastroenterology |
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | Office visit | 99222 |
82 | More often than most peers in Gastroenterology |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
62 | More often than most peers in Gastroenterology |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | Office visit | 99223 |
16 | Less often than most peers in Gastroenterology |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Related specialists at this location 8
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other gastroenterologists in Saint Louis 8
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at University of Chicago, Pritzker School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 2015 at University of Chicago, Pritzker School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 8
Providers in MO who bill this service to Medicare most often.
Common questions
What does Dr. Fritz specialize in?
Dr. Fritz is a gastroenterologist in Saint Louis, MO. That is the designation recorded for this NPI in the federal registry, where it is listed as “Gastroenterology”.
NPI registry
Where is Dr. Fritz located?
Dr. Fritz is listed at 1 Barnes Jewish Hospital Plz Div Im Gastroenterology, Saint Louis, MO 63110. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Fritz's phone number?
The number on file is (314) 747-2066. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Dr. Fritz?
Dr. Fritz's National Provider Identifier is 1821470287. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Fritz go to medical school?
Dr. Fritz attended University of Chicago, Pritzker School of Medicine, graduating in 2015. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Fritz have?
Dr. Fritz has 11 years experience. Calculated from a graduation year of 2015, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Fritz do most often?
According to Medicare billing data, Dr. Fritz performs procedures including biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope, biopsy of large bowel using a flexible endoscope and diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Fritz's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Fritz. If this is you, claiming it is free.
Guide.md
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