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Otolaryngology

Zachary A. Warren, MD

Sees patients in Oxnard, CA · Woodland Hills, CA · Ventura, CA · California

Summary

Dr. Zachary A. Warren, MD is an ENT doctor at 2103 E Gonzales Rd, Oxnard, CA 93036. Phone: (805) 988-6300. Accepts Medicare assignment. NPI 1669933222. Source: CMS National Downloadable File, updated October 2, 2026.

  • Specialty: ENT doctor (Medicare lists Otolaryngology)
  • Address: 2103 E Gonzales Rd, Oxnard, CA 93036 · Directions (2 more locations)
  • Phone: (805) 988‑6300
  • Medicare: Accepts Medicare assignment
  • Group practice: Southern California Permanente Medical Group
  • Medical school: graduated 2019 (7 years since medical school)
  • Gender (as listed): Male
Call(805) 988‑6300 NPI Registry record Medicare profile

From official Medicare data

This page shows what Medicare's official clinician data says about Zachary A. Warren, 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 Zachary A. Warren accept Medicare assignment?
Yes. Medicare's clinician data says Zachary A. Warren 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.
What is Zachary A. Warren's NPI number?
1669933222. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Practice locations

Addresses where Zachary A. Warren is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Zachary A. Warren as a member of this group (CMS data updated October 2, 2026).

  • Southern California Permanente Medical Group11,293 clinicians in the group

Specialties

Find other Otolaryngology doctors in California →

Other ENT doctors in Oxnard

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

All ENT doctors in Oxnard →

Other clinicians in Southern California Permanente Medical Group

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

Clinician information

CredentialMD
Graduation year2019 (7 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1669933222
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. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  2. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  3. Medicare Care Compare — official Medicare tool to look up clinicians