Marissa Mendez, MD

Medicare activity in 2024

Official CMS public-use data for Marissa Mendez, 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 moderate level of medical decision making, if using time, 45 minutes or more (99204)41 services
2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)31 services
3. Telephone medical discussion with physician, 5-10 minutes (99441)17 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 pressure64%
• High cholesterol62%
• Arthritis55%
• Anxiety36%
• Depression32%
• Chronic kidney disease21%

Hospitals where Marissa Mendez works

Medicare's Facility Affiliation Data lists Marissa Mendez 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.

• Mary Hitchcock Memorial HospitalLebanon, NH · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 300003
• Valley Regional HospitalClaremont, NH · Critical Access Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 301308

Practice locations

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

• 1 Medical Ctr DrLebanon, NH 03756 (603) 650‑5000
• 243 Elm StClaremont, NH 03743 (603) 542‑6777

Group practices

Medicare enrollment lists Marissa Mendez 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
• Valley Regional Hospital Inc34 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.

• Kimberly G. Ellis, MD
• Olivier P. Van Houtte, MD
• Stacey A. Abbis, DO
• Boris Bronfine, MD
• Kerrington D. Smith, MD
• Kurt K. Rhynhart, MD
• Evan D. Adams, MD
• Asha M. Zimmerman, 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.

• Charles J. Adler
• Charles I. Brown, MD
• Jonathan A. Farrell, MD
• Megan L. O'Brien
• Marlene A. Santiago, MD
• William C. Torrey, 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