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Family Practice

Marcia D. Toppenberg, MD

Works at hospitals in Greeneville, TN · Johnson City, TN · Tennessee

Summary

Dr. Marcia D. Toppenberg, MD is a family doctor at 1410 Tusculum Blvd, Suite 2600, Greeneville, TN 37745. Phone: (423) 787-7000. Accepts Medicare assignment. In 2024, Marcia D. Toppenberg had 42 Original Medicare patients and 292 services. NPI 1558372557. 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: Family doctor (Medicare lists Family Practice)
  • Address: 1410 Tusculum Blvd, Suite 2600, Greeneville, TN 37745 · Directions
  • Phone: (423) 787‑7000
  • Medicare: Accepts Medicare assignment
  • Hospitals: Greeneville Community Hospital, Johnson City Medical Center
  • Group practice: Family Physicians of Greeneville
  • Medical school: Loma Linda University School Of Medicine · graduated 1994 (32 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 Marcia D. Toppenberg, 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 Marcia D. Toppenberg accept Medicare assignment?
Yes. Medicare's clinician data says Marcia D. Toppenberg 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 Marcia D. Toppenberg see?
In 2024, CMS data shows 42 Original Medicare patients and 292 services for Marcia D. Toppenberg. This counts Original Medicare only and measures volume, not quality.
What is Marcia D. Toppenberg's NPI number?
1558372557. 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 Marcia D. Toppenberg, 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 patients42
Services billed to Medicare292
Different services or procedures28
Participating Medicare providerYes
Average age of these patients73

Most frequent services

  1. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)99 services
  2. Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)28 services
  3. Annual depression screening, 5 to 15 minutes (G0444)25 services
  4. Telephone medical discussion with physician, 21-30 minutes (99443)22 services
  5. Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)14 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 blood pressure75%
  • High cholesterol75%
  • Chronic kidney disease45%
  • Anxiety43%
  • Arthritis36%
  • Depression36%

Hospitals where Marcia D. Toppenberg works

Medicare's Facility Affiliation Data lists Marcia D. Toppenberg 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.

Practice locations

Addresses where Marcia D. Toppenberg is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Marcia D. Toppenberg as a member of this group (CMS data updated October 2, 2026).

  • Family Physicians of Greeneville2 clinicians in the group

Specialties

Find other Family Practice doctors in Tennessee →

Other family doctors in Greeneville

Clinicians with the same Medicare primary specialty in Greeneville, TN — not a recommendation.

All family doctors in Greeneville →

Other clinicians in Family Physicians of Greeneville

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

Clinician information

CredentialMD
Medical schoolLoma Linda University School Of Medicine
Graduation year1994 (32 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1558372557
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