Quick answers
- Does John F. Dermody accept Medicare assignment?
- Yes. Medicare's clinician data says John F. Dermody 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 John F. Dermody see?
- In 2024, CMS data shows 821 Original Medicare patients and 5,931 services for John F. Dermody. This counts Original Medicare only and measures volume, not quality.
- What is John F. Dermody's NPI number?
- 1447348966. 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 John F. Dermody, 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 patients | 821 |
|---|---|
| Services billed to Medicare | 5,931 |
| Different services or procedures | 71 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)1,184 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)1,040 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)895 services
- Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)449 services
- Administration of influenza virus vaccine (G0008)257 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%
- Arthritis47%
- Ischemic heart disease26%
- Depression24%
- Diabetes22%
Hospitals where John F. Dermody works
Medicare's Facility Affiliation Data lists John F. Dermody 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.
- Adventist Health ClearlakeClearlake, CA · Critical Access Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 051317
- Adventist Health St HelenaSaint Helena, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050013
- Providence Queen of the Valley Medical CenterNapa, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050009
- Sonoma Valley HospitalSonoma, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050090
Practice locations
Addresses where John F. Dermody is enrolled with Medicare (CMS data updated October 2, 2026).
- 1001 Professional DrNapa, CA 94558 (707) 252‑0494
Group practices
Medicare enrollment lists John F. Dermody as a member of this group (CMS data updated October 2, 2026).
- Napa Valley Family Medical Group Inc7 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Napa
Clinicians with the same Medicare primary specialty in Napa, CA — not a recommendation.
Other clinicians in Napa Valley Family Medical Group Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Texas Medical School At San Antonio |
| Graduation year | 1984 (42 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1447348966 |
| Corrections | Report 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians