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Internal Medicine

Dana N. Jennings, MD

Works at hospitals in Ojai, CA · Ventura, CA · Valencia, CA … · California

Summary

Dr. Dana N. Jennings, MD is an internal medicine doctor at 2629 Loma Vista Rd, Ventura, CA 93003. Phone: (805) 914-5808. Accepts Medicare assignment. In 2024, Dana N. Jennings had 535 Original Medicare patients and 3,148 services. NPI 1376644989. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

From official Medicare data

This page shows what Medicare's official clinician data says about Dana N. Jennings, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Dana N. Jennings accept Medicare assignment?
Yes. Medicare's clinician data says Dana N. Jennings 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 Dana N. Jennings see?
In 2024, CMS data shows 535 Original Medicare patients and 3,148 services for Dana N. Jennings. This counts Original Medicare only and measures volume, not quality.
What is Dana N. Jennings's NPI number?
1376644989. 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 Dana N. Jennings, 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 patients535
Services billed to Medicare3,148
Different services or procedures34
Participating Medicare providerYes
Average age of these patients77

Most frequent services

  1. Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month (99490)1,054 services
  2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)476 services
  3. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)365 services
  4. Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)197 services
  5. Telephone medical discussion with physician, 5-10 minutes (99441)167 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 cholesterol75%
  • High blood pressure72%
  • Arthritis46%
  • Depression30%
  • Osteoporosis29%
  • Anxiety22%

Hospitals where Dana N. Jennings works

Medicare's Facility Affiliation Data lists Dana N. Jennings 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.

Practice locations

Addresses where Dana N. Jennings is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

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

  • Internal Medicine of Ventura4 clinicians in the group

Specialties

Find other Internal Medicine doctors in California →

Other internal medicine doctors in Ventura

Clinicians with the same Medicare primary specialty in Ventura, CA — not a recommendation.

All internal medicine doctors in Ventura →

Other clinicians in Internal Medicine of Ventura

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

Clinician information

CredentialMD
Graduation year2006 (20 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1376644989
CorrectionsReport 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

  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