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Gastroenterology

Mary-Jane Williams, MD

Works at hospitals in Norfolk, NE · Longmont, CO · Mankato, MN … · Nebraska, Colorado, Minnesota, Ohio, Oklahoma

Summary

Mary-Jane Williams, MD (Gastroenterology) is listed by Medicare at 5 hospitals in Norfolk, NE, Longmont, CO and Mankato, MN and other places. NPI 1285096032. Medicare data says the clinician accepts Medicare assignment. Source: CMS Facility Affiliation Data, updated 2026-10-02.

From official Medicare data

This page shows what Medicare's official clinician data says about Mary-Jane Williams, joined by NPI number (data updated 2026-10-02). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

At a glance

GastroenterologyPrimary specialty
YesAccepts Medicare assignment
19Years since medical school (graduated 2007)
FemaleGender (as listed)
Poudre Valley Medical Group LLCGroup practice (+5 more)

Quick answers

Which hospitals does Mary-Jane Williams work at?
Medicare's official clinician data lists Mary-Jane Williams at 5 hospitals: Faith Health, Longs Peak Hospital, Mayo Clinic Health System - Mankato, Medina Hospital and Mercy Hospital Oklahoma City, Inc. This is where the clinician works or has privileges; call the hospital to confirm.
Where does Mary-Jane Williams see patients?
Medicare's clinician data lists 7 practice locations, including Akron, OH, Medina, OH and Mankato, MN. Call before your visit to confirm the address.
What is Mary-Jane Williams's specialty?
Medicare lists Gastroenterology as the primary specialty.
Does Mary-Jane Williams accept Medicare assignment?
Yes. Medicare's clinician data says Mary-Jane Williams accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
What is the phone number for Mary-Jane Williams?
(330) 384-5050, as listed in official Medicare / NPI Registry data.
What is Mary-Jane Williams's NPI number?
1285096032. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Hospitals where Mary-Jane Williams works

Medicare's Facility Affiliation Data lists Mary-Jane Williams at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.

Practice locations

Addresses where Mary-Jane Williams is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 7; the Medicare profile lists all.

Group practices

Medicare enrollment lists Mary-Jane Williams as a member of these groups (CMS data updated 2026-10-02).

  • Poudre Valley Medical Group LLC2,440 clinicians in the group
  • Mayo Clinic Health System-Southwest Minnesota Region661 clinicians in the group
  • Mercy Clinic Oklahoma Communities649 clinicians in the group
  • Partners Physician Group413 clinicians in the group
  • THS Physician Partners Inc378 clinicians in the group
  • Faith Regional Physician Services LLC195 clinicians in the group

Specialties

Find other Gastroenterology doctors in Ohio →

Other gastroenterologists in Akron

Clinicians with the same Medicare primary specialty in Akron, OH — not a recommendation.

All gastroenterologists in Akron →

Clinician information

CredentialMD
Graduation year2007
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1285096032
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
  2. National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
  3. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  4. Medicare Care Compare — official Medicare tool to look up clinicians