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Gastroenterology

Julianna L. Tantum, DO

Works at hospitals in Bryn Mawr, PA · Wynnewood, PA · Pennsylvania

Summary

Dr. Julianna L. Tantum, DO is a gastroenterologist at 825 Old Lancaster Rd, Suite 320, Bryn Mawr, PA 19010. Phone: (610) 527-3800. Accepts Medicare assignment. NPI 1437786159. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026.

  • Specialty: Gastroenterologist (Medicare lists Gastroenterology)
  • Address: 825 Old Lancaster Rd, Suite 320, Bryn Mawr, PA 19010 · Directions
  • Phone: (610) 527‑3800
  • Medicare: Accepts Medicare assignment
  • Hospitals: Bryn Mawr Hospital, Main Line Hospital Lankenau
  • Group practice: Bryn Mawr Medical Specialists Association
  • Medical school: Philadelphia College Of Osteopathic Medicine · graduated 2020 (6 years since medical school)
  • Gender (as listed): Female

From official Medicare data

This page shows what Medicare's official clinician data says about Julianna L. Tantum, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Julianna L. Tantum accept Medicare assignment?
Yes. Medicare's clinician data says Julianna L. Tantum accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
What is Julianna L. Tantum's NPI number?
1437786159. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Hospitals where Julianna L. Tantum works

Medicare's Facility Affiliation Data lists Julianna L. Tantum at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

  • Bryn Mawr HospitalBryn Mawr, PA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 390139
  • Main Line Hospital LankenauWynnewood, PA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 390195

Practice locations

Addresses where Julianna L. Tantum is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Julianna L. Tantum as a member of this group (CMS data updated October 2, 2026).

  • Bryn Mawr Medical Specialists Association134 clinicians in the group

Specialties

Find other Gastroenterology doctors in Pennsylvania →

Other gastroenterologists in Bryn Mawr

Clinicians with the same Medicare primary specialty in Bryn Mawr, PA — not a recommendation.

All gastroenterologists in Bryn Mawr →

Other clinicians in Bryn Mawr Medical Specialists Association

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialDO
Medical schoolPhiladelphia College Of Osteopathic Medicine
Graduation year2020 (6 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1437786159
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 October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  5. Medicare Care Compare — official Medicare tool to look up clinicians