Matthew Nienaber MD

Matthew Nienaber, D.O.

Internal Medicine

Not Accepting New Patients

About Matthew Nienaber, D.O. 

Born on the West Coast, native of the Bay Area, Matthew K. Nienaber, D.O., was raised in the Pacific Northwest with one foot in the sand and one in the water.  

Caring and compassionate, Dr. Nienaber works with his patients to provide individualized healthcare. With a strong passion for helping the underserved, he participates in medical missions to Africa, South America, and Mexico.  

Dr. Nienaber earned his medical degree at the Western University College of Osteopathic Medicine of the Pacific in Pomona, California. He completed his internship and residency at the Arrowhead Regional Medical Center in Colton, California.  

Dr. Nienaber’s patients say he is an excellent practitioner, is courteous and professional, and puts you at ease. They feel truly fortunate to have Dr. Nienaber as their primary physician.  

Dr. Nienaber is a former competitive dragon boat racer. He enjoys playing piano and bass, as well as restoring classic British race cars.  

I feel like my Doctor really cares about my health

Real Patient
Matthew Nienaber

Selected: Up Next:

Matthew K. Nienaber, D.O.
Family & Internal Medicine

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Family & Internal Medicine
01 / 02

Locations

1821 Wilshire Blvd., Suite 100,
Santa Monica, CA 90403
(310) 575-3100

Education

Medical School
Western University College of Osteopathic Medicine of the Pacific

Internship
Arrowhead Regional Medical Center, Colton, CA

Residency
Arrowhead Regional Medical Center, Colton, CA

Languages

Spanish

child checkup

Reviews

At Providence, we’re dedicated to providing you quality, personalized health care. We are constantly striving to optimize your experience.

As part of ensuring you have a positive experience with Providence, our online provider directory includes ratings and patient comments for select providers. More about our survey.

  • 5
  • 225 Reviews
  • 301 Comments
  • 5
01/12/2025

Very friendly and knowledgeable and helpful

Providence Patient
  • 5
01/08/2025

Excellent service by all staff at Dr. Nienaber's office, very personable, professional and respectful. Dr. Nienaber is always willing to answer questions regarding my concerns or anything that is related to my health.

Providence Patient
  • 5
12/29/2024

I have never had a bad experience with my doctor and people who work in this office. Always professional and courteous , I am completely impressed.

Providence Patient
  • 5
12/19/2024

Dr. Nienaber and his office are the best physicians I have ever known. To say that I'm consistently impressed is an understatement. They always deliver the highest possible standards of care.

Providence Patient
  • 5
12/07/2024

Dr. Nienaber is very present and attentive during every visit. His knowledge of my medical history and warm bedside manner is a welcomed relief to other care providers.

Providence Patient
  • 5
12/06/2024

No bad experiences in my view of this Doctor & staff. Very professional and attentive.

Providence Patient
  • 5
12/05/2024

All my experience with my provider is very good never had any complaints. Thanks to God.

Providence Patient
  • 4.71
12/05/2024

The best

Providence Patient
  • 5
12/02/2024

Dr. Nienabor has always provided great care and concern. He has been aware and considerate with providing information and I recommend him highly.

Providence Patient
  • 5
11/28/2024

Great doctor! Answered all my questions very clearly .

Providence Patient