Jennifer Tonneson, MD

Medicare activity in 2024

Official CMS public-use data for Jennifer Tonneson, 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.

Most frequent services

1. New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)49 services
2. Partial removal of breast (19301)35 services
3. Biopsy or removal of deep lymph nodes of underarm (38525)20 services
4. Imaging of lymph nodes during surgery (38900)20 services
5. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)13 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).

• Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)75%
• High blood pressure60%
• High cholesterol53%
• Arthritis34%
• Osteoporosis27%
• Diabetes26%

Hospitals where Jennifer Tonneson works

Medicare's Facility Affiliation Data lists Jennifer Tonneson 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.

• Alice Peck Day Memorial HospitalLebanon, NH · Critical Access Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 301305
• Cheshire Medical CenterKeene, NH · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 300019
• Mary Hitchcock Memorial HospitalLebanon, NH · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 300003

Practice locations

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

• 1 Medical Ctr DrLebanon, NH 03756 (603) 650‑5000

Group practices

Medicare enrollment lists Jennifer Tonneson as a member of these groups (CMS data updated October 2, 2026).

• Dartmouth-Hitchcock Clinic1,472 clinicians in the group
• Mary Hitchcock Memorial Hospital1,280 clinicians in the group

Specialties

• General Surgeryprimary

Find other General Surgery doctors in New Hampshire →

Other general surgeons in Lebanon

Clinicians with the same Medicare primary specialty in Lebanon, NH — not a recommendation.

• Kerrington D. Smith, MD
• Abraham Matar, MD
• Eric D. Martin, MD
• Michael J. Wood, MD
• Andrew P. Loehrer, MD
• Sara W. Mayo, MD
• Richard J. Barth Jr., MD
• Byron F. Santos Aleman, MD

All general surgeons in Lebanon →

Other clinicians in Dartmouth-Hitchcock Clinic

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

• John F. Dick Iii, MD
• David B. Min, MD
• James T. Devries, MD
• Mark Garret, MD
• Nicholas Cochran-Caggiano, MD
• Emily Goble, PA

Clinician information

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