Antonio Santiago, MD, FACP – An Employed Provider of Memorial Healthcare

Antonio Santiago, MD, FACP

An Employed Provider of Memorial Healthcare
Doctor of Internal Medicine

About Dr. Antonio Santiago, MD, FACP

Dr. Santiago provides internal medicine services with Oscar Macal, MD, FACP and Jason Ardelean, FNP-C at Memorial Healthcare Internal Medicine – Owosso. Dr. Santiago is accepting new patients with most insurances.

View the Memorial Healthcare Internal Medicine (Owosso) website for additional information.

Memorial Healthcare Internal Medicine – Owosso is an employed physician practice of Memorial Medical Associates, a department of Memorial Healthcare.

Accepting new patients


Accepts children




Ponce School of Medicine



Akron General Medical Center



Internal Medicine


Board Certifications

Internal Medicine





300 Health Park Drive, Suite 302
Owosso, MI 48867

Phone: 989-723-5540 Fax: 989-720-2292

Get Directions

Reviews (125)

4.9 Stars Overall

4.9 out of 5 (263 Ratings, 42 Comments)

Nov 22, 2023

Was a regular 6 month visit with doctor

Nov 15, 2023

Excellent experience

Oct 28, 2023

Dr Santiago is great.

Oct 16, 2023

Very good

Oct 14, 2023

He is an excellent medical provider

Oct 13, 2023

Very attentive doctor he listened and spent about an hour with me

Oct 12, 2023

I have been Dr. Santiago's patient for a decade and could not ask for a more professional, knowledgeable or competent physician. I now live more than an hour from his office and gladly make the trip to remain his patient.

Oct 06, 2023

Dr. Santiago was recommended to me and he definitely met my expectations. I felt at ease.

Sep 27, 2023

Dr. Santiago is very thorough, caring and compassionate.

Sep 08, 2023

Listened and explained treatment on a minor problem Gout

Sep 05, 2023

Excellent care is always given by Dr. Santiago and his staff

Aug 26, 2023

Professional and personable

Aug 25, 2023

I love our family dr!

Aug 21, 2023

He couldn't have been better.

Aug 04, 2023

Friendly and professional

Aug 02, 2023

Great care

Jul 27, 2023

No problem - ck up been patient for about 35 yrs.

Jul 21, 2023

Excellent: Dr Santiago has been primary doctor for almost 25 years. I wouldn't go anywhere else. He is our entire families doctor. He's confidential respectful, responds on portal shortly, great bedside manners, caring, most of all I appreciate him more than words can say.

Jun 28, 2023

Dr. Santiago and his office staff are very professions and courtiouse

Jun 28, 2023

Dr. Santiago was very knowledgeable and pleasant to talk with.

Jun 10, 2023


Jun 07, 2023

I Like Dr. Santiago, has always done good for me.

May 31, 2023

Very professional, friendly, caring, attentive, listened

May 24, 2023

Dr. Santiago is very professional, very friendly, very concerned about my medical condition and needs.

May 06, 2023

Dr Santiago is great guy he really cares about his patients

Apr 26, 2023

Dr. Santiago is very caring and generous with his time.

Apr 14, 2023

Antonio Santiago was great he listened. Informed me of different things

Apr 08, 2023


Apr 07, 2023

Outstanding clinician

Apr 07, 2023

Dr was wonderful about figuring out what I had going on.

Apr 05, 2023

Very please with the doctor and his assistants.

Mar 17, 2023


Mar 10, 2023

Dr. Santiago is always excellent

Mar 04, 2023

Dr Santiago is the best doctor

Feb 17, 2023

Very good

Feb 17, 2023

Dr Santiago is amazing. He always listens to my concerns

Feb 13, 2023

I really appreciate the give-and-take we have about the course of action of my treatment

Jan 25, 2023

Dr exhausted every possible diagnostic test including ekg chest X-ray and blood test along with a compassionate interview

Jan 20, 2023

This was an exemplary first visit /impression. Caring and thorough history, patient listener & optimal care planning. Feeling very fortunate to become a patient of Dr. Santiago!

Dec 23, 2022

Set up an appt with a specialist and appt was accomplished in a very timely fashion.

Dec 23, 2022

Great appointment

Dec 23, 2022

He's exceptional.

Dec 08, 2022

He provided time to give me all the explanations I needed and helped me find answers

Dec 02, 2022

Very good

Nov 26, 2022

Dr. Santiago is fabulous! He listens, answers your questions, reviews your records and history and makes recommendations.

Nov 21, 2022

Dr. Santiago listened and I did not feel rushed as all, like my health mattered.

Nov 03, 2022

Always good experience a good dr

Oct 14, 2022

Dr. Santiago has been a great care provider. He listens, relates, and offers his experience and professional opinion when suggesting care options.

Aug 31, 2022

Like Dr Santiago very much seems very caring.

Aug 20, 2022

A good visit.

Aug 05, 2022

He's very good

Jul 13, 2022

Outstanding care

Jul 13, 2022

I have recommended this office to several people, all are pleased.

Jul 06, 2022

He is amazing

Jun 29, 2022

Was happy with the visit

Jun 27, 2022

Dr. Santiago is the best. He is knowledgeable and personable. I recommend him highly.

Jun 18, 2022

Dr. Santiago was knowledgeable about my concerns. He was very kind and listened to me. Can't say enough good things about his total caring.

Apr 22, 2022

Dr. Santiago is a GREAT doctor and wonderful person. MHC is lucky to have him aboard!

Apr 08, 2022

I recommend Dr. Santiago to everyone. I found him a little over 25 years ago and have been seeing him ever since. My only fear is that he will retire or leave the area before I die.

Mar 25, 2022


Mar 25, 2022

I have gone to Dr Santiago for many many years a very caring person

Feb 05, 2022

I'm very pleased with Dr Santiago

Dec 03, 2021


Nov 25, 2021

Dr Santiago is a wonderful doctor.

Nov 06, 2021

Treated with respect

Oct 20, 2021

I've been with doctor Santiago many, many years. I trust him implicitly.

Oct 16, 2021

The doctor took the time to get to know me and my conditions. Very caring and considerate

Oct 08, 2021

I have real bad anxiety & very nervous my first visit, he was very calming. He (they) tried to make me feel very comfortable. He explained things about my various conditions very well on the path we should take.

Oct 07, 2021

Dr. Santiago listened to me, looked at me, was not focused on his laptop, explained things to me, and addressed my concerns in an understanding and helpful way. It was one of the best experiences I have ever had as a new patient.

Sep 29, 2021

I have confidence and trust in him completely.

Sep 16, 2021

The doctor was very receptive and explained concerns I expressed. He did not appeared rushed and listened and responded to my satisfaction.

Sep 15, 2021

I felt heard and understood from Dr. Santiago. He is very knowledgeable and I trust him as our primary care physician

Sep 03, 2021

Very happy with Dr. Santiago & staff

Aug 20, 2021

The Physician was willing to accept my record of daily blood pressure readings to supplement the readings taken in the office. He also explained in detail, the science behind my heart irregularity.

Jul 31, 2021

Dr Santiago always listens to my concerns, explains everything in detail.

Jul 30, 2021


Jul 23, 2021


Jul 22, 2021

Dr. Santiago is a wonderful physician and a pleasure to be around. I know he will always have my best interests at heart, and he will always go above and beyond to make sure my health care needs are meant.

Jul 02, 2021

Love Dr. He is awesome and I always refer him to my friends and family

Jun 11, 2021

Always answers questions & he asks a lot also.

May 23, 2021

My wife recommended me from her mother, and now my wife goes to him too, because of the care i get

May 19, 2021

highly recommended by me

Apr 23, 2021

Dr Santiago Is great

Mar 26, 2021

Dr. Santiago is a terrific primary physician. He always has time for his patients.

Feb 04, 2021

I've been going there since I moved here 20 years ago now my whole family goes there and it's the BEST DOCTOR AND STAFF we all have ever had

Feb 02, 2021

I have always been treated very well here

Jan 21, 2021

I would recommend dr Santiago to any of my family or friends

Jan 15, 2021


Jan 12, 2021

Dr. Santiago is always attentive & never dismissed any of my complaints. I have recommended Dr. Santiago to several people.

Jan 04, 2021

always has concern for my health and is an exceptiiinal) person and doctor. your patient advocate arranged an appointment for me.she is another great employee

Nov 18, 2020

always a good experience. Feels like family.

Oct 07, 2020

The doctor wasnt in a rush to push me through. He is a very considerate and patient man.

Aug 29, 2020

Dr. Santiago is by far the best Dr. I have seen. I am not saying that because of his medical knowledge, I have no means to judge that. I am talking about his genuine concern for his patience well being and piece of mind.

Aug 29, 2020

very friendly and they make me feel like I'm family.

Aug 21, 2020

Have been going to this dr. for many years and have always been treated like my life really mattered to them.

Jul 24, 2020


Jul 21, 2020

I have already recommended many family and friends to Dr. Santiago and they now go to him. They also find him to be an excellent physician and have recommended him to others.

Jun 26, 2020

Dr. Santiago is the finest physician I have ever worked with. He is caring extremely knowledgable and even with all his patients knows me and my health concerns. He is the only Doctor I trust with my care

Mar 30, 2020

I would recommend Memorial to anyone.

Mar 25, 2020

Dr. Santiago is great. Very personable. He isn't a pill pusher.

Feb 21, 2020

The doctor spent as much time as we needed discussing my father's needs and issues. He was very concerned and did not rush us.

Feb 19, 2020

Dr. Santiago is extraordinary for his level of practice and attention to his patients. He shows excellent clinical skill and works as much as possible with treating the patient and meeting the care-needs of his patients. I have first-hand knowledge of his excellence in patient care with not only my case but others and my observation is over years of time. He has an excellent set of clinical skills yet is very easy to discuss care plans with. He also does an excellent job of explaining treatment goals and his care analyses to the individual patient in a manner which is easily understood. Memorial Healthcare is fortunate to have him as a staff internal medicine doctor.

Jan 17, 2020

this is the best medical office I've ever dealt with

Oct 19, 2019

Dr Santiago is very compassionate and caring.

Oct 18, 2019

Have always had a great experience at Dr. Santiago's office.

Aug 21, 2019


Aug 02, 2019

I like him. He is a good listener and he explains thing quite well

Jul 07, 2019

I travel 50 miles to see Dr. Santiago, and consider that a small price to pay. He is an OUTSTANDING care provider!

Jun 15, 2019

He's smart. He doesn't condescend to me. Friendly. I like him.

Jun 14, 2019

I am very glad Dr. Santiago was recommended to me. Completely Satisfied with his care.

May 22, 2019

I think Dr. Santiago is a super doctor and I enjoy my visits with him! My FAV. DOC.

May 18, 2019

Dr. Santiago really has demonstrated his care for each patient and takes the time to listen to the patient's questions and also wants to know what is going on in the patient's life and how it is affecting them.

May 14, 2019

I felt very comfortable with him and look forward to a long relationship with this doctor.

Apr 15, 2019

would recommend this provider to anyone in the area. I travel 2 hours total and would not want to change

Apr 12, 2019

We have complete faith in Dr. Santiago's knowledge of medicine. He keeps up on all medical facts that may relate to a person's health concderns.

Apr 05, 2019

I like the dr. just seems like he wants me to go to other drs. for unknown reasons? does not really do what i wanted done had back issues and he did not really care about it. had foot issues and could not get a referall so had to do it on my own.

Apr 03, 2019

good experience

Apr 03, 2019


Mar 22, 2019

Always very good.

Nov 30, 2018

been dr santiago patient for years, he is outstanding

Nov 26, 2018

I am very happy with Dr. Santiago

Nov 17, 2018

Dr Santiago is the best doctor I've ever had. I wish I had found him years ago.

Aug 20, 2018

My husband and I have been patients of doctor Santiago for many, many years. He has helped us with many medical issues, with care and compassion.

Aug 20, 2018


Aug 15, 2018

Dr. Santiago is, in my opinion, the best PCP there is, hands down.

Ratings Process

The Patient Rating score is based on responses given during the CAHPS Patient Experience Survey. Responses are measured on a 10-point scale, with 10 being the best score. These scores are then translated to a 5-point scale in order to display results in a 5-star rating. Comments are also gathered from the same survey and displayed in their entirety with the exception of any language that may be considered slander, libel or contain private health information, which will be removed prior to publishing the comments.

Insurance Accepted

  • Aetna
  • BCBSM Blue Preferred Plus
  • BCBSM Medicare Plus Blue PPO
  • BCBSM Traditional, HAP
  • BCN Medicare Advantage
  • Blue Care Network
  • Blue Cross Blue Shield PPO/ Trust
  • Blue Cross Complete
  • Cigna
  • Cofinity
  • HAP Empowered Medicaid
  • Health Alliance Plan of MI
  • Humana Military
  • Humana PPO
  • McLaren Commercial
  • McLaren Medicaid
  • Medicaid
  • Medicare
  • Meridian Health Plan Medicaid
  • Molina Healthcare
  • MultiPlan
  • Palmetto GBA(Railroad Medicare)
  • PHCS
  • PHP Commerical
  • PHP Medicare
  • Physicians Health Plan Commercial
  • Priority Health
  • Sparrow Physicians Health Network
  • Tricare Standard
  • United Healthcare Commercial
  • United Healthcare Community Plan

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