Manuel Sierra-Ascencio, MD
Specialty
Internal Medicine
Languages
English, Spanish
Phone Number
Fax Number
1-360-651-7436
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Video transcript
Seeing patients at
Patient Reviews
Patient review summary
Learn about our survey5
4
3
2
1
4.9
20 reviews
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- 5.0 Reviewed on Aug 10, 2026
- Verified Review
He always listens and allows me to be part of the decisions. I never feel pressure and he is very thorough.
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- 5.0 Reviewed on Jul 18, 2026
- Verified Review
I really trust and appreciate Dr. Sierra. He has been my doctor for a long time. I even switched to a new insurance company so I could keep him as my doctor when Optum made my insurance out of network.
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- 5.0 Reviewed on Jul 1, 2026
- Verified Review
Dr. Sierra has always been very good at coming into the appointment well informed and ready to discuss my medical situation.
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- 2.8 Reviewed on Jun 23, 2026
- Verified Review
Clinician asked me if I was on my chart, you would think he knew that answer if the would look
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- 5.0 Reviewed on Jun 9, 2026
- Verified Review
I was very impressed that he had read my recent history and was fully informed from the start.
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- 4.8 Reviewed on May 30, 2026
- Verified Review
A little hard to hear and understand physician when he was wearing a mask as he has a slight accent.
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- 5.0 Reviewed on May 19, 2026
- Verified Review
Dr Seirra is always very attentive and very good at explaining my options. I appreciate is care.
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- 4.8 Reviewed on May 17, 2026
- Verified Review
I have recommended Dr Sierra but he is not taking new patients.
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- 5.0 Reviewed on May 13, 2026
- Verified Review
He is very thorough Doctor. Goes over everything
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- 5.0 Reviewed on May 1, 2026
- Verified Review
Excellent communication.
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- 5.0 Reviewed on Apr 29, 2026
- Verified Review
The doctor is so caring and does his best to find an answers . We are lucky to have him .
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- 5.0 Reviewed on Mar 19, 2026
- Verified Review
I think my doctor really cares about his patients health.
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- 5.0 Reviewed on Mar 6, 2026
- Verified Review
I had a very thorough exam and the Dr uncovered the source of the problem and didn't focus on the result of the problem. He took the time to show me on the computer exactly what I was experiencing. I never had this experience with other Dr's.
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- 4.8 Reviewed on Mar 6, 2026
- Verified Review
Very easy to talk to
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- 5.0 Reviewed on Mar 4, 2026
- Verified Review
Very informative
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- 4.8 Reviewed on Feb 20, 2026
- Verified Review
Dr. Sierra is the only reason I stay with Optum. He is very understanding to all my medical needs and goes above and beyond to help me.
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- 5.0 Reviewed on Jan 29, 2026
- Verified Review
Excellent care with Dr Sierra and his staff
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- 5.0 Reviewed on Jan 28, 2026
- Verified Review
Dr Sierra always explains things thoroughly. He also provided a printout to discuss with my cardiologist. This was above and beyond.
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- 5.0 Reviewed on Jan 24, 2026
- Verified Review
Dr Sierra Ascencio has always done an excellent job of informing/educating me on the fact surrounding my medical issues and integrating my thoughts/opinions into decisions. He has always taken the time to listen to me relating to my concerns and questions.
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- 4.8 Reviewed on Dec 11, 2025
- Verified Review
Very helpful and patient in explaining everything.
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About Manuel Sierra-Ascencio, MD
As a physician I strive to listen, inform and educate my patients about their conditions and treatment options in order to empower them to make better decisions regarding their health. I believe in the importance of preventive care to decrease the risk of health conditions and complications.Philosophy of care
I strongly believe that listening and explaining are great tools to help patients make the best decisions regarding their health.Gender
Male
Board certifications
American Board of Internal Medicine
Licenses
WA, MD60663211
Network Name
Optum Care Washington
NPI
1093952582
Hospital affiliations
Providence Regional Medical Center Everett
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Education
Medical School
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Universidad Nacional Autonoma de Mexico
Residency
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John H Stroger Jr Hospital of Cook County
Internal Medicine
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The contact information listed will direct you to a licensed representative that works with Medicare enrollees to explain Medicare Advantage and Prescription Drug Plan options. There may not be plans available in your area. Any information provided is limited to those plans offered in your area.
*The contact information listed will direct you to a licensed representative that works with Medicare enrollees to explain Medicare Advantage and Prescription Drug Plan options. There may not be plans available in your area. Any information provided is limited to those plans offered in your area. Please contact Medicare.gov or 1-800-MEDICARE to get information on all of your options.
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