Marc-Alan Iwahashi, MD
Family Medicine, Primary Care
4.9 out of 5,
Dr. Marc Iwahashi specializes in family medicine. He has been providing care to the communities surrounding El Camino Health since 1990 and joined the Silicon Valley Medical Development team in May of 2022.
As a family medicine physician, Dr. Iwahashi treats patients of all ages. He's a strong advocate for preventing disease with a healthy lifestyle. Dr. Iwahashi is committed to caring for the physical, mental and emotional needs of his patients, as well as their families. He is fluent in both English and Japanese.
Outside his practice, Dr. Iwahashi cares for his elderly parents. He enjoys spending time with family and friends and being outdoors as much as possible.
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Make a reservationProvider Information
Specialties
Primary Care
Gender
Male
Languages
English
Japanese
Education
Loma Linda University School of Medicine
Medical School
Hinsdale Hospital (Adventist)
Residency, Family Medicine
Verified Reviews
The Patient Satisfaction Rating is an average of all responses to the care provider related questions shown below from our survey. Patients that are treated in outpatient or hospital environments may receive different surveys, and the volume of responses will vary by question.
4.9 out of 5
275 ratings,
42 reviews
8/18/2026
My provider Is very thorough that I have no doubt that he has a lot of patients. I just worry when he will retire.
8/6/2026
Dr. Iwahashi is the doctor I can trust the most.
8/5/2026
He spend his lunch time for me
7/29/2026
Dr. Iwahashi is the best family doctor and all of his assistants are very friendly and professional.
7/23/2026
Dr. Iwahashi is a wonderful doctor. Reviewed my chart thoroughly and answered all my questions!
7/17/2026
Dr. Iwahashi and his staff are phenomenal.
7/14/2026
Physician was attentive and listened with care.
7/1/2026
I love Dr. Iwahashi. He is seriously the best. I have been seeing him over 20 years and drive a good 30 minutes to keep him as my primary doctor.
6/25/2026
Dr Iwahashi is a great listener and responds to concerns with thoughtful information and guidance
6/19/2026
Dr iwahashi is the best!
6/17/2026
Doctor Iwahashi and nurse in this office is best for our family.
6/9/2026
Dr Iwahashi is great and shows great manners when discussing with me. He is attentive and knowledgeable as well as very practical.
5/26/2026
Doctor Iwahashi is caring and taught us a healthy lifestyle. He advised on vaccinations and preventative care. He even responded to my concerns during his PTO. I appreciate it.
5/26/2026
Dr. Iwahashi is a very good doctor. He listens to your concerns and always has a thoughtful answer. He shows he cares about his patient.
5/20/2026
Dr Iwahashi explained everything clearly . I truly appreciate his professionalism and kindness . I would recommend medical team to others.
5/12/2026
Dr. Iwahashi is always listen to my words and concerns. And he always try to find the best way for my treatment.
4/28/2026
I have been Dr. Iwahashi's patient for many years. He always listens to my concerns.
4/27/2026
The entire staff is excellent.
4/1/2026
He amazing
3/27/2026
Thanks a lot for Dr. Iwahashi
3/18/2026
He explained it compared to past records, and also explained it while showing pictures, so it was very easy to understand.
3/17/2026
Dr. Iwahashi is very caring and listens to what I'm saying and also comments.
3/13/2026
That was the best experience ever at the dr. s office. Dr. Iwahashi is really patient and very knowledgeable and reliable.
3/12/2026
Doctor was excellent
3/10/2026
Dr.Iwahashi is always thorough and caring. Listens to patients concerns very well. Great bedside manners.
3/4/2026
My favorite doctor
2/27/2026
DoctorIwahashi is a rock star in my opinion
2/12/2026
He took a long time to examine me carefully. When I see a doctor, I feel very relieved.
1/28/2026
Dr. Iwahashi is an outstanding physician and shows great empathy to the patient. An embodiment of what a Dr needs to be!
1/23/2026
I love Dr.Iwahashi! He is smart and doesn't hmmm and huh, at you. And willing to work with you in your care. Much respect
1/21/2026
I have been a patient of Dr. Iwahashi's for 30+ years and have always been completely satisfied with his attention and care.
1/16/2026
Excellent visit.
1/7/2026
Excellent experience with Dr Iwahashi, he is a good listener and provides options for my care. This appointment was my annual wellness (physical) exam and he discusses how to improve my health while carefully monitoring any problems. I would recommend him to friends and family.
1/2/2026
He is one of the best primary care doctors I've ever been to. He spent 30 minutes with me, carefully listening to all of my concerns and addressing each one. He is a sincere doctor who truly cares about his patients, and I am very grateful for his care.
1/1/2026
Dr. Was able to suggest how I may get a different clinic follow-up.
12/6/2025
Good
12/4/2025
They were very kind
12/2/2025
Dr.Iwahashi is extremely great! He listens well and informs of everything very precisely and in details. Excellent doctor!
11/27/2025
We've been seeing Dr Iwahashi for decades and are very happy with him.
11/25/2025
He is excellent doctor.
11/2/2025
The experience and timelness was excellent
10/23/2025
Have had Dr Iwahashi as my primary care provider for approx 35 years. Would not want any other. Has been an excellent provider for all these years.
Insurance Coverage
Note:Please contact the practice directly to confirm your health plan is in network.
Aetna Choice POS II
Aetna Health Network Only HMO
Aetna Health Network Option
Aetna HMO
Aetna Managed Choice POS
Aetna Open Access Aenta Select EPO
Aetna Open Access Elect Choice EPO
Aetna Open Access Managed Choice POS
Aetna Open Choice PPO
Aetna Quality POS (QPOS)
Aetna Selct EPO
Anthem Blue Cross of California Anthem Blue Access PPO
Anthem Blue Cross of California Anthem Blue PPO/EPO
Anthem Blue Cross of California Anthem Blue Preferred Select & Preferred Blue
Anthem Blue Cross of California BlueCard PPO
Anthem Blue Cross of California Keycare PPO
Anthem Blue Cross of California PPO
Anthem Blue Cross of California PPO Metallic Plans (Platinum, Gold, Silver, Bronze)
Anthem Blue Cross of California Prudent Buyer PPO
Blue Shield of California Advantage EPO
Blue Shield of California Alliance Select
Blue Shield of California Basic Blue / Blue Card / Blue Newtork
Blue Shield of California Blue Choice
Blue Shield of California Blue Options / Blue Preferred
Blue Shield of California CalPERS Gold & Platinum
Blue Shield of California PPO / EPO
Blue Shield of California PPO Metallic Plans (Platinum, Gold, Silver, Bronze)
Blue Shield of California TriNet III PPO
Cigna HMO
Cigna HMO POS
Cigna Network
Cigna Network POS
Cigna Open Access Plus
Cigna PPO
Cigna PPO Tiered
HealthNet Blue & Gold HMO
HealthNet Employer Sponsored Medicare Advantage
HealthNet EPO
HealthNet ExcelCare Elect Out of Access POS
HealthNet ExcelCare HMO
HealthNet HMO
HealthNet Medicare COB
HealthNet POS
HealthNet PPO
HealthNet SmartCare HMO
HealthNet Standard Elect Out of Access POS
HealthNet Standard HMO
HealthNet Standard POS
Medicare
SCAN Health Plan Medicare Advantage HMO - Agreement terminates effective 12/31/26
TRICARE West Tricare Prime
TRICARE West Tricare Prime Remote
TRICARE West Tricare Reserve Select
TRICARE West Tricare Retired Reserve
TRICARE West Tricare Select
TRICARE West Tricare Young Adult
United Healthcare Core and Core Essentials
United Healthcare Select and Select Plus
United Healthcare Surest
UnitedHealthcare Choice and Choice Plus
UnitedHealthcare EDGE
UnitedHealthcare Navigate
UnitedHealthcare NexasACO
UnitedHealthcare Options PPO Plans
UnitedHealthcare SignatureValue Plans
UnitedHealthcare Tired Benefit Plans
Valley Health Plan Covered California HMO
Valley Health Plan HMO Classic / Select
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Map & Directions
Family Medicine Cedar
2660 Grant Rd, Ste E Mountain View, CA 94040