John N. Walter Jr., MD

Medicare activity in 2024

Official CMS public-use data for John N. Walter Jr., 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. Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes (99309)466 services
2. Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more (99308)271 services
3. Residence visit for established patient with low level of medical decision making, per day, if using time, at least 30 minutes (99348)63 services
4. Residence visit for established patient with moderate level of medical decision making, per day, if using time, at least 40 minutes (99349)45 services
5. Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 10 minutes (99307)40 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%
• Alzheimer's disease or dementia68%
• Arthritis45%
• Depression45%
• High cholesterol42%
• Chronic kidney disease33%

Hospitals where John N. Walter Jr. works

Medicare's Facility Affiliation Data lists John N. Walter Jr. 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.

• Cheshire Medical CenterKeene, NH · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 300019

Practice locations

Addresses where John N. Walter Jr. is enrolled with Medicare (CMS data updated October 2, 2026).

• 20 Warwick RdWinchester, NH 03470 (603) 239‑6351

Group practices

Medicare enrollment lists John N. Walter Jr. as a member of this group (CMS data updated October 2, 2026).

• Dartmouth-Hitchcock Clinic1,472 clinicians in the group

Specialties

• Family Practiceprimary

Find other Family Practice doctors in New Hampshire →

Other family doctors in New Hampshire

Clinicians with the same Medicare primary specialty in New Hampshire — not a recommendation.

• Michael A. Bergeron, MD
• James D. Tollman, MD
• James D. Barlow, DO
• Eric E. Cooney, MD
• Aaron D. Solnit, MD
• Paul K. Friend, MD
• Tyler P. Martin, DO
• Peter Rees, MD

All family doctors in New Hampshire →

Other clinicians in Dartmouth-Hitchcock Clinic

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

• Cigal N. Okojie
• Michael H. Keuroghlian, MD
• Janelle L. Park, MD
• Kimberly M. Molina, MD
• Jeremiah X. Karrs, DO
• Samantha White, DO

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