Jeff Willis, M.D.
NPI 1356385991 · Gastroenterology Physician · Missoula, MT
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jeff Willis, M.D. is a Gastroenterology Physician provider in Missoula, MT (NPI 1356385991).
Provider details
- NPI number
- 1356385991
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 56022 (MT)
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
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
878 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) |
|---|---|---|
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 212 | $114 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 185 | $234 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 121 | $104 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 48 | $126 |
| Diagnostic Exam of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43235 | 42 | $104 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Sodium Chloride/Nahco3/Kcl/Pegbrand: Peg 3350-Electrolyte | 350 | 334 |
| Omeprazole | 103 | 36 |
| Pantoprazole Sodium | 69 | 22 |
| Sodium Chloride/Nahco3/Kcl/Pegbrand: Gavilyte-N | 28 | 28 |
| Famotidine | 27 | — |
| Sod Sulf/Pot Chloride/Mag Sulfbrand: Sutab | 23 | 22 |
| Linaclotidebrand: Linzess |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$31 across 2 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
Registry dates
- Enumerated
- 2006-06-15
- Last updated
- 2024-10-07
- Certified
- 2024-10-07
Frequently asked questions
- What is Jeff Willis's NPI number?
- Jeff Willis's National Provider Identifier (NPI) is 1356385991, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jeff Willis's specialty?
- Jeff Willis is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Jeff Willis located?
- Jeff Willis's practice location on file with NPPES is 1930 W Broadway St Ste a, Missoula, MT 59808-1960.
- What is Jeff Willis's phone number?
- The practice phone number listed in the NPPES registry for Jeff Willis is (406) 541-6844.
- Does Jeff Willis accept Medicare?
- Jeff Willis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jeff Willis's NPI active?
- Yes — Jeff Willis's NPI (1356385991) is active in the NPPES registry as of the last update on 2024-10-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.