
Highlights
Age Groups Seen
- Child 2-12
- Adolescent 12-21
- Adult 21-65
- Older Adult >65
Languages
- Spanish
- English
Gender
MaleAbout Michael Richard Portillo
About The Provider
Michael Portillo, MD, earned his medical degree at Universidad Dr. José Matías Delgado in El Salvador, where in his final year of schooling he provided free medical clinics in rural villages, treating acute and chronic illnesses common to the region. After completing a year as a primary care physician at the Paisnal Health Clinic, also in El Salvador, he completed a clinical preceptorship at the Sky Lakes Medical Center in Klamath Falls, OR.
Dr. Portillo credits his father, a chiropractor, for his path into medicine. “The connections he had with his patients is what impressed me and made me want to pursue medicine.” That impression influences how Dr. Portillo practices medicine today. “I try to empower the patient to be more conscious of their health. That way they can help me better understand their needs.”
Originally from Burlingame, CA, Dr. Portillo moved to El Salvador, his father’s home country, when he was 14, but his roots in Tuolumne County run deep. His grandparent’s owned and operated the dry goods store in historic Columbia, where his mother would spend summers away from San Francisco working in the store.
Provider Type
Physician
Locations
- Pavilion Primary Care: Adventist Health Sonora
- 900 Mono Way, Sonora, CA 95370
- Get Directions
- phone: 209-536-6925
- Primary Care: Adventist Health Sonora
- 193 Fairview Lane, Suite B, Sonora, CA 95370
- Get Directions
- phone: 209-536-5100
Expertise
Education
Universidad de El Salvador
Medical SchoolMercy Medical Ctr Merced
Residency ProgramBoard Certifications
Family Medicine
American Board of Family Medicine, 2017Insurance
- Aetna
- Anthem Blue Cross
- Anthem MediCal
- Blue Shield
- CA Health & Wellness
- CCS (AHSR)
- Cigna
- CMSP (County Medical Services Program) (AHSR)
- Health Net Medi-CAL (AHSR only)
- HealthNet
- Medi-cal ORP1
- Medicare AHSR Part B
- Medicare Railroad
- Stanislaus Foundation (AHSR)
- Tricare
- TriWest
- UHC
- Western Growers (AHCL) (AHSR)
Ratings & Reviews
4.8 out of 5
540 ratings, 77 reviewsThe provider star rating is calculated using patient responses to the five care provider questions in our patient satisfaction survey. Below you can see the provider’s star rating and the number of his or her patients who have provided feedback.
- 5 out of 5 starsReviewed on 9/27/2025
She listened to me carefully and was very attentive.
- 5 out of 5 starsReviewed on 9/26/2025
After the wait- I was satisfied with the Doctor
- 5 out of 5 starsReviewed on 9/25/2025
My compliments to my Dr. Michael Portillo.
- 5 out of 5 starsReviewed on 9/10/2025
Listening to me always
- 5 out of 5 starsReviewed on 9/8/2025
Dr Portillo is an excellent primary care doctor! He is very professional and knowledgeable on treatments. He is very caring and interested in his patients' progress.
- 5 out of 5 starsReviewed on 9/6/2025
Dr. Portillo at Pavilion has always been good to me.
- 5 out of 5 starsReviewed on 9/1/2025
Dr. Portillo Is knowledgeable, compassionate, and has a wonderful bedside manner. I felt very comfortable and well-informed during my visit.
- 5 out of 5 starsReviewed on 8/24/2025
Excellent doctor. Takes time to listen carefully, explains clearly and makes sure all questions are answered. Has a pleasant, reassuring demeanor.
- 5 out of 5 starsReviewed on 8/23/2025
Dr Portillo is very good at discussing any questions or concerns. He never makes you feel rushed.
- 5 out of 5 starsReviewed on 8/21/2025
Doctor Portillo listens and care about what I say. Great doctor
- 5 out of 5 starsReviewed on 8/19/2025
Absolutely the best
- 1 out of 5 starsReviewed on 8/18/2025
Doctor has/had a very poor 'bedside manner'. 2nd time I walked out on the appointment for the same reason.
- 5 out of 5 starsReviewed on 8/15/2025
Dr. Portillo listens and explains in layman's termsso thankful for his wisdom and abilities to fully understand my concerns about my health
- 5 out of 5 starsReviewed on 8/12/2025
Very good about listening to all that's changed since I saw him last time. Takes the time to find a solution
- 5 out of 5 starsReviewed on 8/8/2025
Attentive and cheerful team.
- 5 out of 5 starsReviewed on 8/7/2025
I felt Dr Portillo was engaged and answered all my questions needs.
- 5 out of 5 starsReviewed on 8/7/2025
I regard Dr. Portillo in the highest regard. He listens, he is empathetic, and just all around a wonderful doctor.
- 5 out of 5 starsReviewed on 8/1/2025
Dr.Portillo always listens very carefully to my symptoms and understands what my concerns are.
- 5 out of 5 starsReviewed on 7/29/2025
I would highly recommend Dr. Portillo.
- 5 out of 5 starsReviewed on 7/28/2025
Dr Portillo is always very thorough and professional. He is an excellent primary care doctor!
- 5 out of 5 starsReviewed on 7/16/2025
Dr. Portillo always takes the time to listen. He does not minimize my concerns and totally includes me in the discussion regarding my care.
- 5 out of 5 starsReviewed on 7/15/2025
My provider is very attentive to me all the time listening to me
- 5 out of 5 starsReviewed on 7/15/2025
Exemplary in every professional aspect.
- 5 out of 5 starsReviewed on 7/11/2025
This is an exceptional doctor. I would recommend this practice to anyone I know!
- 5 out of 5 starsReviewed on 6/29/2025
Dr. Portillo has always been a delight and made me feel outstandingly cared for.
- 5 out of 5 starsReviewed on 6/14/2025
Continues to be the best primary care physician I have ever had
- 5 out of 5 starsReviewed on 6/10/2025
Dr. Portillo is amazing
- 5 out of 5 starsReviewed on 5/30/2025
My whole family has him for their doctor
- 5 out of 5 starsReviewed on 5/26/2025
Dr. Portillo is great, great listener and very caring and thorough. Always answers my questions and his explanation of my care is easy to comprehend. I am completely satisfied with the care I receive from him.
- 2 out of 5 starsReviewed on 5/22/2025
He had x-rays, (3) needed a MRI! Took to long to get it.
- 5 out of 5 starsReviewed on 5/13/2025
Dr Portillo always listens to see what your needs are.
- 1 out of 5 starsReviewed on 5/12/2025
If I have three things wrong with me, this doctor makes me wait for each separate appointment for each separate problem and will not help me and is very rude with no compassion and very unprofessional.
- 5 out of 5 starsReviewed on 5/1/2025
The doctor is very good and helpful !!
- 5 out of 5 starsReviewed on 4/20/2025
Dr Portillo is always attentive and willing to answer your questions
- 5 out of 5 starsReviewed on 4/18/2025
Dr Portillo is very caring and professional. He always listens to you and responds to all of your questions.
- 5 out of 5 starsReviewed on 4/18/2025
Dr Portillo is a great doctor as he actively listens and answers my questions in ways that I can understand.
- 5 out of 5 starsReviewed on 4/16/2025
Very happy there
- 5 out of 5 starsReviewed on 4/16/2025
Dr. Portillo always listens and answers my questions in a way that I can understand
- 5 out of 5 starsReviewed on 4/12/2025
I would highly recommend this doctor to everyone. The skill and knowledge coupled with the compassion is unsurpassed.
- 5 out of 5 starsReviewed on 4/8/2025
I am a fan of Dr. Portillo. He is easy to speak with about my concerns. He asks questions & listens to my responses
- 5 out of 5 starsReviewed on 3/29/2025
Doc Portillo is always kind.
- 5 out of 5 starsReviewed on 3/28/2025
Excellent job and very professional
- 5 out of 5 starsReviewed on 3/26/2025
Great service.
- 5 out of 5 starsReviewed on 3/26/2025
Doctor Portillo was attentive, kind and thorough as always.
- 5 out of 5 starsReviewed on 3/26/2025
Dr Portillo listens and is very knowledgeable.He gives very good care.
- 5 out of 5 starsReviewed on 3/9/2025
Dr Portillo treats me with kindness and caring every time I see him. He listens to my concerns and answers all my questions
- 4 out of 5 starsReviewed on 3/7/2025
Good experience he goes straight to the point and explain everything very nicely
- 4 out of 5 starsReviewed on 3/4/2025
Listened to what I said
- 5 out of 5 starsReviewed on 2/20/2025
Dr Portillo listened carefully and demonstrated a sincere interest in helping resolve my health issues. I am happy to be his patient and am confident in the care he provides.
- 5 out of 5 starsReviewed on 2/7/2025
Dr. Portillo always chases down my health problems. Sometimes it is with a referral, but often it is during the office visit.
- 5 out of 5 starsReviewed on 2/5/2025
Everything is so professional.
- 5 out of 5 starsReviewed on 1/31/2025
Since my appointment, I have struggled to get responses from a message I sent through the Patient Portal.
- 5 out of 5 starsReviewed on 1/21/2025
Never rushed! Patience with my questions
- 5 out of 5 starsReviewed on 1/19/2025
My Dr. Listens very well.
- 5 out of 5 starsReviewed on 1/10/2025
I feel that the doctor listens to me and is concerned about my health.
- 5 out of 5 starsReviewed on 1/10/2025
Very attentive and professional.
- 5 out of 5 starsReviewed on 1/9/2025
I would highly recommend all of the individuals who helped me!
- 5 out of 5 starsReviewed on 1/8/2025
Dr Portillo is an excellent primary care doctor. Very knowledgeable and caring.
- 5 out of 5 starsReviewed on 12/20/2024
As always, Dr. Portillo is a superlative provider. He listens carefully to my symptoms & makes appropriate recommendations their resolution. He is also very flexible with the type of appointment that we have, as I needed to make this a telephone appointment.
- 5 out of 5 starsReviewed on 12/20/2024
Dr Portillo explained in detail lab test my husband and I were concerned about. We felt much better after talking to him.
- 5 out of 5 starsReviewed on 12/20/2024
Dr Portillo is an exceptional physician. Listens carefully, addresses all questions. Thorough explanations. Couldn't have a better doctor
- 5 out of 5 starsReviewed on 12/20/2024
Ever so good across the board!!!
- 5 out of 5 starsReviewed on 12/19/2024
I feel more at ease in Dr Portillo's presence than ever. He listens well and is more engaged than I sensed when I first started seeing him. I will definitely recommend him when the opportunity presents.
- 5 out of 5 starsReviewed on 12/18/2024
Doctor Portillo is a very good doctor informative on my care as a senior citizen
- 5 out of 5 starsReviewed on 12/12/2024
Dr. Portillo continues to be the best primary care team I have ever had!
- 5 out of 5 starsReviewed on 12/6/2024
Great experience very caring office
- 5 out of 5 starsReviewed on 12/3/2024
Excellent service. It has helped me improve my physical and emotional stability. All the time I feel that he cares about my well-being.
- 5 out of 5 starsReviewed on 11/24/2024
Very satisfied and please with the care I receive from Dr. Portillo.
- 5 out of 5 starsReviewed on 11/23/2024
Doctor was excellent.
- 5 out of 5 starsReviewed on 11/22/2024
Dr Portillo is great! He listens and answers questions in a way that I understand. He actively listens!
- 5 out of 5 starsReviewed on 11/21/2024
Dr Portillo is ver professional and listens to you.
- 5 out of 5 starsReviewed on 11/13/2024
I love Dr. Portillo. I would recommend him to anybody.
- 5 out of 5 starsReviewed on 10/29/2024
Doctor Portillo was very professional and courteous. He took time to answer all of my questions, and adress all of my concerns. I felt very comfortable, and confident in his ability to perform my surgery.
- 5 out of 5 starsReviewed on 10/29/2024
Dr portillo is very professional and actually listened to me
- 5 out of 5 starsReviewed on 10/21/2024
Dr. Portillo was amazing! He explained everything and was so kind and sensitive. I am blessed to have him as my primary care physician.
- 5 out of 5 starsReviewed on 10/21/2024
Love Dr. Portillo, I always receive excellent care.
- 5 out of 5 starsReviewed on 10/9/2024
Dr Portillo was so kind and caring about a personal issue I was having. I appreciated him listening and sharing his insights