Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Dr. Stephen Willis, MD

Individual provider Gastroenterology Physician · NPI 1629139076

Dr. Stephen Willis, MD practises Gastroenterology in Phillipsburg, New Jersey. Graduated from Rutgers R W Johnson Medical School (CAM/NEW Bruns/Pisc) in 1998, 28 years ago. Practices with St Lukes Physician Group Inc, a 2,127-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in New Jersey and Pennsylvania.

Years since qualifying
28
Trained at
Rutgers R W Johnson Medical School (CAM/NEW Bruns/Pisc)
Licensed in
NJ, PA
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

755 Memorial Pkwy Bldg 100
Phillipsburg, NJ 08865-2748
Phone: (484) 526-6545
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 41 Corporate Dr Ste 101, Easton, PA 18045-2670 — (484) 526-6545

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 25MA08845200 (NJ)
Gastroenterology Physician Taxonomy 207RG0100X · Licence MD459022 (PA)

Record details

NPI number1629139076
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedDecember 12, 2006
Last updated in NPPESOctober 3, 2025
Certification dateOctober 3, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyGASTROENTEROLOGY
Medical schoolRUTGERS R W JOHNSON MEDICAL SCHOOL (CAM/NEW BRUNS/PISC)
Graduated 1998 (28 years in practice)
Group practice St Lukes Physician Group Inc — 2127 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Upper gastrointestinal (GI) endoscopy for acid reflux 320 times · 96th percentile
Colonoscopy 208 times · 94th percentile

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients721
Services billed 1,429 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at St Lukes Physician Group Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2127 clinicians in the practice; 12 are shown here.

Other providers in Phillipsburg