Medical emergency?Emergency? Call 911. Nearest emergency roomsNearest ERs

Internal Medicine

Lauren Theriault, MD

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

Summary

Dr. Lauren Theriault, MD is an internal medicine doctor at 3855 W Chester Pike, Suite 300, Newtown Square, PA 19073. Phone: (484) 427-8000. Accepts Medicare assignment. In 2024, Lauren Theriault had 301 Original Medicare patients and 1,014 services. NPI 1215321500. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

  • Specialty: Internal medicine doctor (Medicare lists Internal Medicine)
  • Address: 3855 W Chester Pike, Suite 300, Newtown Square, PA 19073 · Directions
  • Phone: (484) 427‑8000
  • Medicare: Accepts Medicare assignment
  • Hospitals: Bryn Mawr Hospital, Main Line Hospital Lankenau, Paoli Hospital and 1 more
  • Group practice: Main Line Healthcare
  • Medical school: Hahnemann University College Of Medicine · graduated 2015 (11 years since medical school)
  • Gender (as listed): Female
  • Telehealth: offered

From official Medicare data

This page shows what Medicare's official clinician data says about Lauren Theriault, 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 Lauren Theriault accept Medicare assignment?
Yes. Medicare's clinician data says Lauren Theriault 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.
How many Medicare patients does Lauren Theriault see?
In 2024, CMS data shows 301 Original Medicare patients and 1,014 services for Lauren Theriault. This counts Original Medicare only and measures volume, not quality.
What is Lauren Theriault's NPI number?
1215321500. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Medicare activity in 2024

Official CMS public-use data for Lauren Theriault, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Original Medicare patients301
Services billed to Medicare1,014
Different services or procedures28
Participating Medicare providerYes
Average age of these patients74

Most frequent services

  1. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)369 services
  2. Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)151 services
  3. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)132 services
  4. Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use (90677)66 services
  5. Administration of influenza virus vaccine (G0008)66 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

  • High cholesterol75%
  • High blood pressure59%
  • Arthritis48%
  • Ischemic heart disease25%
  • Osteoporosis24%
  • Anxiety23%

Hospitals where Lauren Theriault works

Medicare's Facility Affiliation Data lists Lauren Theriault 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
  • Paoli HospitalPaoli, PA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 390153
  • Riddle Memorial HospitalMedia, PA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 390222

Practice locations

Addresses where Lauren Theriault is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Lauren Theriault as a member of this group (CMS data updated October 2, 2026).

  • Main Line Healthcare1,184 clinicians in the group

Specialties

Find other Internal Medicine doctors in Pennsylvania →

Other internal medicine doctors in Newtown Square

Clinicians with the same Medicare primary specialty in Newtown Square, PA — not a recommendation.

All internal medicine doctors in Newtown Square →

Other clinicians in Main Line Healthcare

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

Clinician information

CredentialMD
Medical schoolHahnemann University College Of Medicine
Graduation year2015 (11 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1215321500
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. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians