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Corey Marcell Warner

Corey Marcell Warner, MD

Internal Medicine

Online Booking
Video Visit
Need help scheduling? Call 707-987-8344

Highlights

Age Groups Seen

  • Adult 21-65
  • Older Adult >65

Languages

  • English

Gender

Male

About Corey Marcell Warner

About The Provider

Dr. Warner brings more than 17 years of experience helping patients to get and stay healthy. He brings considerable expertise and training. He earned his medical degree from Oregon Health Sciences University in Portland, Oregon and completed his residency in internal medicine at Legacy Emanuel Hospital and Health Center in Portland, Oregon. He is board certified by the American Board of Internal Medicine. Dr. Warner has a very successful practice in Hidden Valley Lake where he has helped literally thousands of patients to stay healthy. He has a strong passion for helping patients to lose weight as a first defense for prevention of disease.

Provider Type

Physician

Locations

  1. Primary Care: Adventist Health
    • 18990 Coyote Valley Road, Suite 10, Hidden Valley Lake, CA 95467
    • Get Directions

Expertise

Education

  • Medical School: Oregon Health & Science University
  • Residency Program: Legacy Emanuel Hospital and Medical Center

Insurance

Please contact the practice directly to confirm your health plan is accepted.
Search plans
  • Aetna
  • AH Employee/ Incentive Health
  • Anthem Blue Cross
  • Blue Shield
  • Cigna
  • Coventry
  • Galaxy
  • HealthNet
  • HealthSmart
  • Medi-cal ORP1
  • Medicare AHCL Part B
  • Medicare AHPN Part B Overlay
  • Network by Design
  • Partnership (Under Hospital TIN)
  • PFMC
  • Tricare
  • TriWest
  • TRPN
  • UHC
  • Western Growers

Ratings & Reviews

4.9 out of 5

575 ratings, 81 reviews

Our providers are at the heart of delivering whole-person care. We encourage patients to share their experiences through a patient satisfaction survey they receive following visits. Provider star ratings are calculated using patient responses to provider-focused questions in this survey. Please see the provider’s star rating and patient reviews below. Thank you for giving Adventist Health the opportunity to support your best health.

Likelihood of recommending this provider
Search reviews
    5 out of 5 stars
    Reviewed on 3/26/2026

    Doctor was listened amd communicated treatment clearly.

    5 out of 5 stars
    Reviewed on 2/24/2026

    Dr. Warner Is amazing! 10 stars!!!

    5 out of 5 stars
    Reviewed on 2/21/2026

    Caring and considerate.

    5 out of 5 stars
    Reviewed on 2/19/2026

    Doctor warner is very good at taking care of me and my medical issues

    5 out of 5 stars
    Reviewed on 2/17/2026

    Best Doctor cares about his patients and I would definitely recommend

    5 out of 5 stars
    Reviewed on 2/3/2026

    Dr Warner listened to me very intently. He made me feel comfortable enough to speak my concerns. He is very thorough. Awesome doctor

    5 out of 5 stars
    Reviewed on 2/2/2026

    Dr. Warner is EXCELLENT

    5 out of 5 stars
    Reviewed on 1/29/2026

    Dr. Warner is the best. Great listener and smart enough and caring enough to do the research and find great solutions.

    3 out of 5 stars
    Reviewed on 1/23/2026

    I really like Dr Warner however as mentioned he did not hear my needs.

    5 out of 5 stars
    Reviewed on 1/16/2026

    Doctor Warner is the best doctor in the world!!

    5 out of 5 stars
    Reviewed on 1/16/2026

    Dr. Warner Is the best. He has been my primary for the last twenty-years, and I trust him completely. Dr. Warner come into the room prepared, with a positive attitude, and good bedside manner.

    5 out of 5 stars
    Reviewed on 1/8/2026

    I ask questions.I felt heard.

    5 out of 5 stars
    Reviewed on 1/7/2026

    Dr Warner is the best!

    5 out of 5 stars
    Reviewed on 1/7/2026

    Professional and caring.

    5 out of 5 stars
    Reviewed on 1/6/2026

    Dr Warner is a great listener

    5 out of 5 stars
    Reviewed on 12/25/2025

    Dr. Warner is great couldn't ask for a better doctor.

    5 out of 5 stars
    Reviewed on 12/24/2025

    Dr. Warner is awesome! He listens and explains things whereas I'm able to understand. He is very thorough in all my appointments.

    5 out of 5 stars
    Reviewed on 12/20/2025

    Very good, as I have come to expect.

    5 out of 5 stars
    Reviewed on 12/18/2025

    Dr Warner was very helpful and supportive

    5 out of 5 stars
    Reviewed on 12/16/2025

    Best care available

    5 out of 5 stars
    Reviewed on 12/4/2025

    I really like this doctor but I don't think he really understood the level of pain I was experiencing.

    5 out of 5 stars
    Reviewed on 11/14/2025

    Doctor Warner is the best.His gal that took the vitals is wonderful and kind. By in

    5 out of 5 stars
    Reviewed on 11/12/2025

    Best doctor ever

    5 out of 5 stars
    Reviewed on 11/12/2025

    Best practice ever

    5 out of 5 stars
    Reviewed on 11/9/2025

    Very good experience as always with doctor

    5 out of 5 stars
    Reviewed on 10/31/2025

    Dr. Warner is always helpful and caring

    5 out of 5 stars
    Reviewed on 10/30/2025

    Dr Warner is the best!

    5 out of 5 stars
    Reviewed on 10/24/2025

    We love Dr Warner

    5 out of 5 stars
    Reviewed on 10/23/2025

    Dr Warner always listens and takes me seriously

    5 out of 5 stars
    Reviewed on 10/21/2025

    Very good doctor.

    5 out of 5 stars
    Reviewed on 10/16/2025

    Always good experience

    5 out of 5 stars
    Reviewed on 10/6/2025

    Dr Warner has always taken very good care of me & my family members! He always listens carefully to whatever we have to say! I appreciate him & his care very much!!

    5 out of 5 stars
    Reviewed on 10/4/2025

    Dr Warner is wonderful

    5 out of 5 stars
    Reviewed on 10/2/2025

    Dr. Warner was fantastic, caring and very thorough, listen to my concerns and prescribed exactly what I needed

    5 out of 5 stars
    Reviewed on 9/28/2025

    Dr. Warner answered all of my questions and took time with me. It was a great dr Appt

    5 out of 5 stars
    Reviewed on 9/26/2025

    Dr. Warner was great

    5 out of 5 stars
    Reviewed on 9/24/2025

    I really appreciated Dr. Warner taking a moment on a busy day to comfort me after I shared that my dog passed away. His compassion and kindness meant so much to me.

    5 out of 5 stars
    Reviewed on 9/24/2025

    Dr. Warner went above and beyond. He took time to discuss my issues and answered any questions I had. I felt listened to.

    5 out of 5 stars
    Reviewed on 9/24/2025

    I continue to be impressed with the excellent care provided by Dr. Warner. He is so helpful and I certainly appreciate it very much.

    5 out of 5 stars
    Reviewed on 9/23/2025

    Dr. Warner was thorough & asked many questions. He advised a well thought out plan of action for continuing care. He is caring & compassionate.

    5 out of 5 stars
    Reviewed on 9/19/2025

    Dr Warner is amazing. Always willing to listen.

    5 out of 5 stars
    Reviewed on 9/18/2025

    Dr Warner was amazing. He took the time to get to know me and my medical background. He genuinely cared and was so compassionate, funny, and kind. This is THE best experience I've ever had at a doctor's office. So happy to be under his care.

    5 out of 5 stars
    Reviewed on 9/12/2025

    Dr Warner sat down in a chair to talk to me and really listen to me. It made me feel seen

    5 out of 5 stars
    Reviewed on 9/11/2025

    He answered all my questions

    5 out of 5 stars
    Reviewed on 9/9/2025

    Dr. Warner is A#1.

    5 out of 5 stars
    Reviewed on 9/8/2025

    Friendly and knowledgeable

    5 out of 5 stars
    Reviewed on 9/4/2025

    Dr. Warner is welcoming, and listens attentively to my needs. He always offers encouragement, support and valuable information.

    5 out of 5 stars
    Reviewed on 9/4/2025

    Always recommend Dr Warner to others if they mention they are searching for care

    5 out of 5 stars
    Reviewed on 9/3/2025

    Dr. Warner always listens to and addresses my concerns.

    5 out of 5 stars
    Reviewed on 9/2/2025

    Very knowledgeable and attentive

    5 out of 5 stars
    Reviewed on 8/29/2025

    Dr. Warner helped me understand what was going on in my CT scan. He put my anxiety at ease. Thank you

    5 out of 5 stars
    Reviewed on 8/27/2025

    Dr. Warner was very concerned with my condition when I arrived for my appt.

    5 out of 5 stars
    Reviewed on 8/15/2025

    Dr. Warner listened and responded very well to my concerns. Took time to explain result of my test so I could understand

    5 out of 5 stars
    Reviewed on 8/15/2025

    Dr Warner was emphatically fighting for me which made me feel advocated for and listened to

    5 out of 5 stars
    Reviewed on 8/14/2025

    Dr. Warner is the best!!!! He makes you feel cared about.....

    5 out of 5 stars
    Reviewed on 8/14/2025

    Doctor Warner is the best

    5 out of 5 stars
    Reviewed on 8/13/2025

    I feel very comfortable with Dr Warner

    5 out of 5 stars
    Reviewed on 8/11/2025

    Dr listened and understood what I was needing and was able to to comment and expand to better product to meet my needs and get a prescription in the works for me at a new pharmachy based on my specific issues and concerns.

    5 out of 5 stars
    Reviewed on 8/3/2025

    Dr Warner and I get a long very well!

    5 out of 5 stars
    Reviewed on 8/1/2025

    Dr Warner always listens to my concerns!

    5 out of 5 stars
    Reviewed on 7/27/2025

    Grateful for a physician that really focuses on personalized care

    5 out of 5 stars
    Reviewed on 7/27/2025

    Dr. Warner is always listens to my concerns and tries to lead me to the best options when considering my health.

    5 out of 5 stars
    Reviewed on 7/17/2025

    Dr Warner is very good at listening and medical problem solving. I enjoy every interaction with him

    5 out of 5 stars
    Reviewed on 7/12/2025

    Reviewed all of my health Issues. Explained both good and problem health factors

    5 out of 5 stars
    Reviewed on 7/11/2025

    Cory was very friendly and a great doc now that he has more time.

    5 out of 5 stars
    Reviewed on 7/9/2025

    Dr. WARNER is always very attentive

    5 out of 5 stars
    Reviewed on 6/26/2025

    Dr Warner has always taken very good care of me, listened to me & taken me seriously & taken care of all of my needs very well!!

    5 out of 5 stars
    Reviewed on 6/25/2025

    Dr.Warner is great

    5 out of 5 stars
    Reviewed on 6/19/2025

    Dr. Warner took a long time with me, and was very caring about my problems.He made me feel cared about and had good references for me.He is the best. He gave me RX's for depression and sleep.

    5 out of 5 stars
    Reviewed on 6/13/2025

    Dr Warner always listens to my concerns

    5 out of 5 stars
    Reviewed on 6/10/2025

    I have never had a doctor as attentive as Dr. Warner.

    5 out of 5 stars
    Reviewed on 6/10/2025

    Doctor listened to me and answered all my questions

    5 out of 5 stars
    Reviewed on 5/28/2025

    Good listener, very kind and gentle asked appropriate questions to understand my issue

    5 out of 5 stars
    Reviewed on 5/28/2025

    One of the best I've ever had

    5 out of 5 stars
    Reviewed on 5/22/2025

    Dr. Warner was fully engaged.

    5 out of 5 stars
    Reviewed on 5/4/2025

    He is the best

    5 out of 5 stars
    Reviewed on 5/1/2025

    Dr Warner has always taken very good care of me & I always have felt very supported

    5 out of 5 stars
    Reviewed on 5/1/2025

    Dr Warner is upbeat and emphatic. He makes you feel good about progress you've made. He takes the time to answer questions thoroughly and in a way you can understand.

    5 out of 5 stars
    Reviewed on 4/29/2025

    I feel Dr warner cares about me.he has a good sense of humor and makes me feel comfortable

    5 out of 5 stars
    Reviewed on 4/25/2025

    Very professional

    5 out of 5 stars
    Reviewed on 4/19/2025

    Dr Warner is awesome