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Anacleto B Diaz, II

Anacleto B Diaz, II, MD

Internal Medicine

Accepting New Patients
Need help scheduling? Call (616) 267-8338

Highlights

Age Groups Seen

  • Adult 18-64
  • Older Adult 65+

Languages

  • English

Gender

Male

Affiliations

  • Corewell Health Grand Rapids Hospitals

About Anacleto B Diaz, II

About the Provider

Anacleto Diaz II, MD, is board certified in internal medicine. He received his medical degree from the University of the East Ramon Magsaysay Memorial Medical Center and post-graduate medical internship at the University of the Philippines - Philippine General Hospital. Dr. Diaz completed his internal medicine residency then served as Chief Medical Resident at St. John Hospital and Medical Center in Detroit.

His clinical interests include achievement of better health through education, compassion and developing partnerships with patients.

Locations

  1. Corewell Health Internal Medicine - 426 Michigan St NE
    • phone: 616-267-8338
    • fax: 616-459-1909

Experience

Education

  • Residency: Ascenstion St John Hospital, Department of Internal Medicine, Internal Medicine, 2010
  • Internship: Ascenstion St John Hospital, Department of Internal Medicine, Internal Medicine, 2007
  • Medical School: University of the East Ramon Magsaysay Memorial Medical Center, Doctor of Medicine (MD), 2002

Board Certifications

  • Internal Medicine: American Board of Internal Medicine, 2009

Insurance

Search plans
  • Aetna/Cofinity
  • Align Senior Care MI
  • BCBS Medicare Advantage Plus Blue
  • BCBS PPO
  • BCBS Traditional
  • Blue Care Network
  • Blue Care Network Medicare Advantage
  • Blue Cross Complete
  • Cigna
  • Coventry First Health
  • HAP/ASR
  • Humana Military (Tricare East)
  • McLaren Commercial
  • McLaren Medicaid
  • McLaren Medicare Advantage
  • Medicaid
  • Medicare
  • Molina Medicaid/MiChild/Marketplace (Health Plus)
  • Molina Medicare
  • Priority Health Choice Medicaid
  • Priority Health HMO/PPO
  • Priority Health Medicare Advantage
  • Trinity Health Plan of MI
  • UHC/Optum (VA Community Care Network)
  • UM Health Plan
  • United Health Care Commercial
  • United Health Care Dual Complete

Ratings & Reviews

5 out of 5

215 ratings, 96 reviews

Corewell Health is committed to delivering high-quality and compassionate care. These ratings and reviews are transparent patient feedback collected via survey following a provider care experience that asks patients and families about the care they received.

Search reviews
    5 out of 5 stars
    Reviewed on 3/24/2026

    Dr. Diaz is very caring & never rushes the appointment.

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

    Dr Diaz actually saved my life by being proactive. He did a CAT scan to check on some lung modules and they found early. Liver cancer.

    5 out of 5 stars
    Reviewed on 3/21/2026

    He has always been a great supportive doctor with lots of knowledge and he truly listens when I'm speaking and is genuine with his answers or information to share and all around I really like him as my doctor and feel he has me at best interest so Dr Diaz is great

    5 out of 5 stars
    Reviewed on 3/18/2026

    Excellent care!

    5 out of 5 stars
    Reviewed on 3/17/2026

    I need higher ratings to click: like outstanding or above and beyond. He is truly a one of a kind doctor.

    5 out of 5 stars
    Reviewed on 3/14/2026

    His attentive care and thorough follow thru are wonderful. Can't imagine a better MD!

    5 out of 5 stars
    Reviewed on 3/13/2026

    There are none better

    5 out of 5 stars
    Reviewed on 3/12/2026

    He’s the best!

    5 out of 5 stars
    Reviewed on 3/12/2026

    Dr Diaz, understands that each patient has their own separate diagnosis and treatment, (What works for her may not work for him), he’s very thorough he listening and takes action runs test and he takes the time.

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

    Awesome

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

    Such a good listener and very professional

    5 out of 5 stars
    Reviewed on 2/12/2026

    He is very caring and personable. The best Dr. I have ever had.

    4 out of 5 stars
    Reviewed on 2/10/2026

    He tries to solve people issues and is only not successful because of how corewell's practices tie his hands.

    5 out of 5 stars
    Reviewed on 2/8/2026

    I felt like he was genuinely concerned for my health and existing medical conditions. It was a comfortable experience and I felt his genuine concern for my health and well-being.

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

    He was so kind, caring and gentle. He took the time to get to know me as a first time patient. I was so grateful to have found him.

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

    first impression fantastic person impeccable

    5 out of 5 stars
    Reviewed on 1/26/2026

    He is very good and experienced

    5 out of 5 stars
    Reviewed on 1/22/2026

    He has been a godsend. Im a Butterworth dr son and most MD's are not what I grew up with. He is my forever dr

    5 out of 5 stars
    Reviewed on 1/17/2026

    Willing to help me stay off meds.

    5 out of 5 stars
    Reviewed on 1/15/2026

    He explains things well, comes in prepared, I can't say enough as how pleased I am with Dr Diaz

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

    Dr Diaz listened carefully to all my questions and concerns. He looked at me as we talked and did not just stare at the computer. He showed me that he was very interested in what I had to say and answered all of my questions.

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

    Listens, doesn't rush and makes you feel like you're not an inconvenience to him

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

    Dr Diaz is a very thorough and well learned Dr and is not afraid to ask questions about something he isn't filmilar with.

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

    That Diaz allowed me to have a virtual meeting with him over the Internet, and I really appreciate not having to come in and be examined because I was really ill

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

    An excellent doctor!!

    5 out of 5 stars
    Reviewed on 1/2/2026

    Very caring about his patience

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

    Best doctor anyone could have.

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

    Excellent

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

    I will not see any other internist...unless a situation forces me to.

    5 out of 5 stars
    Reviewed on 11/27/2025

    Great

    5 out of 5 stars
    Reviewed on 11/25/2025

    Dr. Diaz is the best.

    5 out of 5 stars
    Reviewed on 11/23/2025

    Dr. Diaz was totally aware of all my medical problems on my first visit. He explained everything very clearly and in detail so I understood

    5 out of 5 stars
    Reviewed on 11/22/2025

    Dr. Diaz is a great diagnostician who is also very warm and personable. He listens to everything and considers the next steps carefully. I’m very happy to have him on my side!

    5 out of 5 stars
    Reviewed on 11/20/2025

    He is an excellent doctor with great interpersonal skills.

    5 out of 5 stars
    Reviewed on 11/19/2025

    I trust Dr Diaz to have my best interests in mind. He actually saved my life. He was following some modules in my lungs so ordered a CAT scan. Besides my lungs, this showed a liver tumor which was taken care of in its early stages. If he hadn’t been so thorough I would be in big trouble.

    5 out of 5 stars
    Reviewed on 11/19/2025

    I trust him

    5 out of 5 stars
    Reviewed on 11/18/2025

    He is very knowledgeable and thoural.

    5 out of 5 stars
    Reviewed on 11/17/2025

    He is a rockstar

    5 out of 5 stars
    Reviewed on 11/17/2025

    Excellent in knowledge and bedside manner.

    5 out of 5 stars
    Reviewed on 11/4/2025

    Very good doesn’t describe Dr Diaz. He is above excellence.

    5 out of 5 stars
    Reviewed on 11/4/2025

    Always takes time and care which I so appreciate

    5 out of 5 stars
    Reviewed on 11/1/2025

    Dr has excellent knowledge, is very personable and easy to talk to

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

    Always thorough and extremely knowledgeable and informative. Dr. D is the best.

    5 out of 5 stars
    Reviewed on 10/28/2025

    Pleasant and easy to talk to.

    5 out of 5 stars
    Reviewed on 10/25/2025

    Very understanding and caring

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

    Excellent care

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

    Before Dr Diaz. I had 4 previous doctors after a spinal injury. My first visit with Dr Diaz at your Kalamazoo Ave location went extremely well. I had brought in printed documents as well as CD's of my imaging. Dr Diaz spent a good 40 minutes at first, reviewing my history, a first!!! I have followed Dr Diaz from there to his two downtown locations.

  • No RatingReviewed on 10/18/2025

    A wonderful caring doctor

    5 out of 5 stars
    Reviewed on 10/9/2025

    We feel completely confident in the health care Dr. Diaz provides for us, and we recommend him highly.

    5 out of 5 stars
    Reviewed on 10/8/2025

    Kind intelligent person who cares

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

    Dr.Diaz is an excellent listener and helps you understand what is happening. If referrals are needed , Dr.and staff are on it.

    5 out of 5 stars
    Reviewed on 10/3/2025

    Very professional and knowledgeable, competent physician. He cares and we trust him. He definitely works best when he is not hurried and we arrive with a written list of our concerns. An EXCELLENT provider!

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

    As I said he is the very best doctor I have ever had as my doctor.

    5 out of 5 stars
    Reviewed on 10/1/2025

    Continue to support the patient with health care planning

    5 out of 5 stars
    Reviewed on 9/27/2025

    He has personally experienced some of the same health problems as me and understands completely.

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

    Dr Diaz & I make a good team. I am delighted and thankful to have Dr Diaz. He gives me the very best possible Medical care. God has Blessed his practice.

    5 out of 5 stars
    Reviewed on 9/25/2025

    He listens when you may bring up something you have a concern with.

    5 out of 5 stars
    Reviewed on 9/25/2025

    very happy with him.

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

    The same thing is very good

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

    I feel comfortable with him being my primary care doctor.

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

    He is more of a friend than a paid provider

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

    He is the best.

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

    He is the best you bestvtreat him well!

    5 out of 5 stars
    Reviewed on 9/17/2025

    He knows me, very professional, but exceptionally knowledgeable

    5 out of 5 stars
    Reviewed on 9/15/2025

    Been working with Dr Diaz for years. He takes good care of me!

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

    Dr. Diaz is the best

    5 out of 5 stars
    Reviewed on 9/10/2025

    Very caring. Takes his time with you and explains things.

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

    He just has a beautiful heart for people and their concerns.

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

    He is the best. Listens well, explains things thoroughly. Follows through reliably

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

    Dr. Diaz was very thorough and I didn't feel rushed at all during the appointment.

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

    Friendly and professional.

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

    Amazing first visit with him. Listens to my concerns. Taking steps to address my needs

    5 out of 5 stars
    Reviewed on 8/20/2025

    Dr. Diaz relates to his patients and truly cares about getting them the care they need. He covers a lot of ground in a short appointment time. He is a very smart man , but can explain things in a very understandable way.

    5 out of 5 stars
    Reviewed on 8/17/2025

    I have no words to express how much I trust Dr Diaz. I don’t question him if he says anything, like I do other doctors, he’s the best doctor I have. The best I’ve ever had.

    5 out of 5 stars
    Reviewed on 8/16/2025

    He is a very caring doctor and extremely knowledgeable.

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

    He is great. Very pleased he joined your practice at IM. Excellent addition.

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

    Dr. Diaz is the best! I have followed him from two previous practices and will keep following him wherever he goes. He really listens to not only my symptoms, but to me as a person as well. He always offers me a couple of options of care, and explains why. We discuss them and then he offers the one he feels will best suit my situation. He's very caring and personable.

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

    He is the best physician on the planet.

    5 out of 5 stars
    Reviewed on 8/4/2025

    He listens & explains

    5 out of 5 stars
    Reviewed on 8/2/2025

    He is the model doctor that every doctor should be.

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

    Your rating scale does not allow the ability to clearly state how incredible Dr Diaz is!!!

    5 out of 5 stars
    Reviewed on 7/30/2025

    He's brilliant, sensitive to his patients needs and very caring!

    5 out of 5 stars
    Reviewed on 7/30/2025

    Anacleto is one of the nicest caring people O have ever met in the health care industry this far.

    5 out of 5 stars
    Reviewed on 7/30/2025

    He is like talking to a family member.

    5 out of 5 stars
    Reviewed on 7/29/2025

    I'm glad to have Dr Diaz as my new physician!

    5 out of 5 stars
    Reviewed on 7/28/2025

    Exceptional knowledge, thorough exam an pleasant demeanor! 😊

    5 out of 5 stars
    Reviewed on 7/24/2025

    makes you feel safe

    5 out of 5 stars
    Reviewed on 7/24/2025

    Dr. Diaz is one of the Best Doctors. This office is very blessed to have him!

    5 out of 5 stars
    Reviewed on 7/21/2025

    Like how explained everything during the exam.

    5 out of 5 stars
    Reviewed on 7/18/2025

    Luv him

    5 out of 5 stars
    Reviewed on 7/18/2025

    Dr. Diaz cares about me and is always concerned with giving me the best care.

    5 out of 5 stars
    Reviewed on 7/14/2025

    Excellent Doctor

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

    Very satisfied and would recommend to others

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

    Have to wait and see if change in meds will help.

    5 out of 5 stars
    Reviewed on 7/8/2025

    I felt better just having my appt with Dr Diaz

    5 out of 5 stars
    Reviewed on 7/8/2025

    I appreciate his professional-yet-personal bedside manner. He is extremely knowledgeable and caring.