Barrett Wallis, MD
NPI 1740220938 · Gastroenterology Physician · Crystal River, FL
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Barrett Wallis, MD is a Gastroenterology Physician provider in Crystal River, FL (NPI 1740220938).
Provider details
- NPI number
- 1740220938
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 35.088718 (OH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,182 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 253 | $124 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 155 | $132 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 135 | $180 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 101 | $91 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 76 | $187 |
| Office Or Other Outpatient Visit for the Evaluation and Management of Established Patient That May Not Require Presence of Healthcare Professional |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 19 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Omeprazole | 111 | 56 |
| Famotidine | 71 | 35 |
| Prochlorperazine Maleate | 59 | 56 |
| Pantoprazole Sodium | 52 | 23 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-G | 41 | 40 |
| Dicyclomine Hcl | 41 | 27 |
| Nystatin | 36 | 31 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$489 across 24 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 10600 Montgomery RdMontgomery, OH 45242-4463Phone: (513) 794-5600
Registry dates
- Enumerated
- 2006-06-07
- Last updated
- 2024-10-10
- Certified
- 2024-10-10
Frequently asked questions
- What is Barrett Wallis's NPI number?
- Barrett Wallis's National Provider Identifier (NPI) is 1740220938, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Barrett Wallis's specialty?
- Barrett Wallis is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Barrett Wallis located?
- Barrett Wallis's practice location on file with NPPES is 6152 W Corporate Oaks Dr, Crystal River, FL 34429-8722.
- What is Barrett Wallis's phone number?
- The practice phone number listed in the NPPES registry for Barrett Wallis is (352) 564-3900.
- Does Barrett Wallis accept Medicare?
- Barrett Wallis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Barrett Wallis's NPI active?
- Yes — Barrett Wallis's NPI (1740220938) is active in the NPPES registry as of the last update on 2024-10-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.