Karen R. Tenner, MD

Medicare activity in 2024

Official CMS public-use data for Karen R. Tenner, 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. Insertion of needle into vein for collection of blood sample (36415)247 services
2. Hemoglobin a1c level (83036)109 services
3. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)108 services
4. Blood test, lipids (cholesterol and triglycerides) (80061)105 services
5. Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)81 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 cholesterol68%
• High blood pressure61%
• Arthritis32%
• Osteoporosis29%
• Anxiety26%
• Depression25%

Hospitals where Karen R. Tenner works

Medicare's Facility Affiliation Data lists Karen R. Tenner 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.

• Mount Auburn HospitalCambridge, MA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 220002

Practice locations

Addresses where Karen R. Tenner is enrolled with Medicare (CMS data updated October 2, 2026).

• 40 Holland StSomerville, MA 02144 (617) 629‑6000

Group practices

Medicare enrollment lists Karen R. Tenner as a member of this group (CMS data updated October 2, 2026).

• Atrius Health Inc1,222 clinicians in the group

Specialties

• Family Practiceprimary

Find other Family Practice doctors in Massachusetts →

Other family doctors in Somerville

Clinicians with the same Medicare primary specialty in Somerville, MA — not a recommendation.

• Parker D. Hall, DO
• Sherar Andalcio, MD
• Miriam Segura-Harrison, MD
• Priyanka Dharampuriya, DO
• Daniel T. Wemple, MD
• Deborah Bershel, MD
• Claudia L. Ma, MD
• Van H. Pham, MD

All family doctors in Somerville →

Other clinicians in Atrius Health Inc

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

• Jennifer R. Bai, NP
• Camara Kadete
• Ajay K. Singla, MD
• Gloria Lee Kazakov
• Susan C. Sullivan, PA
• Elizabeth A. Dupuis, MD

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