background
background
Dr. Corey Warner, MD

Dr. Corey Warner, MD

Internal Medicine*
25+ years of experience

Dr. Corey Warner, MD is an internist in Hidden Valley Lake, CA and has over 25 years of experience in the medical field. Dr. Warner has extensive experience in Osteoporosis & Screening. He graduated from Oregon Health & Science University in 1997. He is affiliated with medical facilities such as Adventist Health Clear Lake and Adventist Health St. Helena. He is accepting new patients and telehealth appointments.

4.5 Star Rating
Based on 38 reviews 4.5 Star Rating (38 reviews)

Practice

18990 Coyote Valley Rd Ste 8 Hidden Valley Lake, CA 95467
Telehealth available
(707) 987-8344

At a Glance

  • Area of Expertise
    Dr. Warner specializes in the area of Internal Medicine. • See board certifications
  • Explains Conditions Well
    Patients said this doctor explains conditions well. • See reviews
  • Offers Telehealth
    This doctor offers telehealth appointments. Call the office to schedule an appointment.
  • Hospital Satisfaction
    Patients said they were highly satisfied at this doctor's hospital. • See hospitals
ADVERTISEMENT
healthgrades-rx

Save money with free prescription discounts

Optum Perks and Healthgrades are subsidiaries of RVO Health.

Experience Check

Search for experience in a specific area

Learn more about experience and why treatment frequency matters

Insurance Check

Search for your insurance carrier and choose your plan type

Dr. Warner's Reviews

Likelihood to recommend Dr. Warner

4.5

38 ratings, 12 with a written review
5 Star
87%
87%
4 Star
0%
0%
3 Star
0%
0%
2 Star
3%
3%
1 Star
11%
11%

Your trust is our top concern. Learn more.

We monitor all reviews to ensure they comply with our guidelines and don’t include personal information, profanity, libel, defamation, harassment, obscenity or fraud.

All reviews are confirmed and audited before publication, and community members have the ability to flag inappropriate content for further review by our team.

Doctors can not pay for good reviews, nor can they pay to have negative reviews removed.

Any reviews that are deemed fraudulent or violate our guidelines will be removed immediately.

RecentHighestLowestMost Helpful
What went well
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
3 people found this helpful
Helpful
Ruthann McCloskey – Oct 23, 2022
×Post a ResponseAre you Dr. Corey Warner, MD?
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
1 person found this helpful
Helpful
Sep 14, 2022
×Post a ResponseAre you Dr. Corey Warner, MD?
What went well
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
1 person found this helpful
Helpful
Donna Hageman – Jan 08, 2021
×Post a ResponseAre you Dr. Corey Warner, MD?
What went well
No results
What could be improved
  • Didn't listen or answer questions
  • Didn't explain conditions well
  • Didn't trust the provider's decisions
5 people found this helpful
Helpful
Karene Jolley – Jul 13, 2020
×Post a ResponseAre you Dr. Corey Warner, MD?
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Dr. Betty Lue – Apr 02, 2020
×Post a ResponseAre you Dr. Corey Warner, MD?
What went well
  • Trusted the provider's decisions
What could be improved
No results
1 person found this helpful
Helpful
Nov 19, 2019
×Post a ResponseAre you Dr. Corey Warner, MD?
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
5 people found this helpful
Helpful
Middletown, CA – Jan 30, 2019
×Post a ResponseAre you Dr. Corey Warner, MD?
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
  • Long wait times
4 people found this helpful
Helpful
Deborrah in Clearlake,Ca – May 17, 2018
×Post a ResponseAre you Dr. Corey Warner, MD?
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
12 people found this helpful
Helpful
shirley hunter in clearlake, ca – Apr 01, 2017
×Post a ResponseAre you Dr. Corey Warner, MD?
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
8 people found this helpful
Helpful
CEShore in Kelseyville, CA – Sep 19, 2016
×Post a ResponseAre you Dr. Corey Warner, MD?
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
10 people found this helpful
Helpful
Diane Roger in Kelseyville, CA – May 10, 2016
×Post a ResponseAre you Dr. Corey Warner, MD?
What went well
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
8 people found this helpful
Helpful
Atlanta, GA – May 04, 2016
×Post a ResponseAre you Dr. Corey Warner, MD?

Leave a review

How was your experience with Dr. Warner?

Know Before You Go

About Me

care philosophy

Treatment of the whole person, including mind, body & spirit

  • Internal Medicine

  • Endocrinology, Diabetes & Metabolism

  • Family Medicine

  • Obesity Medicine

*Healthgrades does not verify qualifications for medical specialties. Please verify your provider's specialty and qualifications directly with your provider and applicable medical board.

  • Legacy Emmanuel Hospital And Medical Center

    Residency Hospital

  • Oregon Health & Science University

    Medical School, 1997
American Board of Medical Specialties®
American Board of Internal Medicine®
- 
Internal Medicine
For detailed information about any of the below board actions, please search for the provider's records on the linked state licensing board or the Federation of State Medical Boards. Information last updated March 29, 2025. To learn more about the difference between these sources, please refer to our FAQs.
Board actions foundState licensing board
More than three years ago
Illinois Department of Financial and Professional Regulation

Healthgrades receives board action history for physicians and physician assistants. The information displayed here is sourced from independent information providers, such as state board websites, and may not be the most up-to-date information. Healthgrades makes no representations with respect to the accuracy of any information provided here and assumes no responsibility or liability for such information.

Learn more about medical license public record check

Focus on Brain Health

Locations

Practice

St. Helena Obstetrics and Gynecology18990 Coyote Valley Rd Ste 8 Hidden Valley Lake, CA 95467
1

Affiliated Hospitals

  • Adventist Health St. Helena

    10 Woodland Rd
    Saint Helena, CA 94574
    Recipient of 7
    hospital awards

    Outstanding Patient Experience Award™ (2022)

    Top in the nation for overall patient experience based on nine measures related to doctor and nurse communication, hospital cleanliness and noise levels, and medication and post-discharge care instructions

    View all awards

    How patients felt about the care they received at this hospital.

    86%
    Patients said they were given information about recovering at home

    2% higher than the national average

    79%
    Patients said that nurses always listened to them and explained things well

    4% higher than the national average

    View all patient feedback

  • Sutter Lakeside Hospital

    5176 Hill Rd E
    Lakeport, CA 95453

    How patients felt about the care they received at this hospital.

    89%
    Patients said they were given information about recovering at home

    1% higher than the national average

    79%
    Patients said that nurses always listened to them and explained things well

    3% lower than the national average

    View all patient feedback

  • Adventist Health Ukiah Valley

    275 Hospital Dr
    Ukiah, CA 95482
    Recipient of 4
    hospital awards

    How patients felt about the care they received at this hospital.

    87%
    Patients said they were given information about recovering at home
    76%
    Patients said that nurses always listened to them and explained things well

    2% lower than the national average

    View all patient feedback
Learn more about how Healthgrades measures Hospital Quality