Stephen Willis, MD
NPI 1629139076 · Gastroenterology Physician · Phillipsburg, NJ
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephen Willis, MD is a Gastroenterology Physician provider in Phillipsburg, NJ (NPI 1629139076).
Provider details
- NPI number
- 1629139076
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 25MA08845200 (NJ)
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 tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
1,315 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 195 | $92 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 184 | $97 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 156 | $127 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 117 | $85 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 104 | $18 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 12 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Pantoprazole Sodium | 221 | 81 |
| Omeprazole | 205 | 77 |
| Famotidine | 139 | 48 |
| Esomeprazole Magnesium | 88 | 31 |
| Sodium Chloride/Nahco3/Kcl/Pegbrand: Peg 3350-Electrolyte | 73 | 73 |
| Sucralfate | 24 | — |
| Linaclotidebrand: Linzess | 20 | — |
Practice location
Mailing address
Additional practice locations (1)
- 41 Corporate Dr Ste 101Easton, PA 18045-2670Phone: (484) 526-6545
Registry dates
- Enumerated
- 2006-12-12
- Last updated
- 2025-10-03
- Certified
- 2025-10-03
Frequently asked questions
- What is Stephen Willis's NPI number?
- Stephen Willis's National Provider Identifier (NPI) is 1629139076, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Willis's specialty?
- Stephen Willis is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Stephen Willis located?
- Stephen Willis's practice location on file with NPPES is 755 Memorial Pkwy Bldg 100, Phillipsburg, NJ 08865-2748.
- What is Stephen Willis's phone number?
- The practice phone number listed in the NPPES registry for Stephen Willis is (484) 526-6545.
- Does Stephen Willis accept Medicare?
- Stephen Willis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephen Willis's NPI active?
- Yes — Stephen Willis's NPI (1629139076) is active in the NPPES registry as of the last update on 2025-10-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.