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Edit this profileWhere to find Barrett J. Wallis, MD
- Crystal River location main office
6152 W Corporate Oaks Dr, Crystal River, FL 34429 - Montgomery location
10600 Montgomery Rd, Montgomery, OH 45242
About Dr. Wallis
Based in Crystal River, FL, Barrett J. Wallis, MD is listed in the NPI registry under gastroenterology. According to Medicare claims data, Barrett cared for 843 Medicare patients across 1,182 services. The services billed most often include subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes, established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, and initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes. NPI 1740220938 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
- (352) 564-3900
- Email not available
Practice Locations
6152 W CORPORATE OAKS DR
Crystal River, FL 34429
10600 Montgomery Rd
Montgomery, OH 45242
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
Chronic conditions
Liver health
Specialized and cancer
Wound care
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
Advanced endoscopy
Biliary and pancreatic endoscopy
Capsule and physiology testing
- Ambulatory reflux monitoring
- Capsule endoscopy
- Hydrogen and methane breath testing
- Anorectal manometry
- Esophageal manometry
Chronic illness
Clinical Nutrition
Diagnostic Testing
Digestive
General surgery
Infection & Microbiology Tests
Liver procedures
Lower endoscopy
- Colon polyp removal
- Diagnostic colonoscopy
- Endoscopic control of gastrointestinal bleeding
- Flexible sigmoidoscopy
Nursing care
Nutrition & Digestion
Upper endoscopy
- Endoscopic mucosal resection
- Esophageal biopsy
- Esophageal dilation
- Stomach biopsy
- Endoscopic submucosal dissection
Most searched procedures
Treatments
Procedures Most Often Billed to Medicare
1,182 services · 843 patients · 17 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43239 |
101 | More often than most peers in Gastroenterology |
| Biopsy of large bowel using a flexible endoscope | Procedure | 45380 |
59 | More often than most peers in Gastroenterology |
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | Procedure | 45385 |
21 | Less often than most peers in Gastroenterology |
| Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm | Procedure | 43249 |
19 | As often as other peers in Gastroenterology |
| Removal of polyps or growths of large bowel using a flexible endoscope with electrical cautery | Procedure | 45384 |
15 | Less often than most peers in Gastroenterology |
| Ultrasound scan of organ tissue for measuring elasticity | Imaging | 76981 |
51 | More often than most peers in Gastroenterology |
| Complete ultrasound scan of abdomen | Imaging | 76700 |
46 | More often than most peers in Gastroenterology |
| Measurement of liver stiffness | Treatment | 91200 |
52 | More often than most peers in Gastroenterology |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | Office visit | 99233 |
253 | More than most peers in Gastroenterology |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
155 | More 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.
Also at this address 3
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 Crystal River 8
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
More connections — 16 related providers in 2 groups
Class of 1979 at Other 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 FL who bill this service to Medicare most often.
Common questions
What is Dr. Wallis's specialty?
Dr. Wallis is a gastroenterologist in Crystal River, FL. That is the designation recorded for this NPI in the federal registry, where it is listed as “Gastroenterology”.
NPI registry
Where can I find Dr. Wallis?
Dr. Wallis is listed at 6152 W Corporate Oaks Dr, Crystal River, FL 34429. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Wallis?
The number on file is (352) 564-3900. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Dr. Wallis's NPI number?
Dr. Wallis's National Provider Identifier is 1740220938. 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
What is Dr. Wallis's medical education?
Dr. Wallis attended Other, graduating in 1979. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Wallis been practicing?
Dr. Wallis has 47 years experience. Calculated from a graduation year of 1979, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Wallis known for?
According to Medicare billing data, Dr. Wallis 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 removal of polyps or growths of large bowel using an endoscope with mechanical snare; reads or performs imaging such as ultrasound scan of organ tissue for measuring elasticity and complete ultrasound scan of abdomen; provides treatments such as measurement of liver stiffness, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Wallis confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Wallis. If this is you, claiming it is free.
Guide.md
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