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Alex Mroszczyk-McDonald, MD

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My specialty:
Family Medicine

My provider affiliation:
Kaiser Permanente physician

I speak: English

My gender: Male

Where I practice

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About me

Hello, and welcome to my Web page. I hope this page will help you to get to know me a bit better. I believe in lifestyle medicine to promote good physical and mental health. As a former professional triathlete and life-long athlete I am a strong advocate for great nutrition and proper sleep as first line treatment for many health conditions. I believe that exercise is medicine, nutrition is medicine and see myself a guide to helping you live a long and healthy life.


I grew up in New England and completed much of my education on the East Coast, but now call Southern California home. I attended medical school at The University of Vermont. I completed my intern year at Duke University, and then my family medicine residency and sports medicine fellowship at Kaiser Permanente in Fontana, CA. When I completed my training I loved working here so much I stayed and moved my office down the hallway. I have three kids and my wife is a physician as well.

About my practice

As a family medicine doctor with a specialization in sports medicine, I focus on treating the whole person, not just one part. I believe that exercise, nutrition and sleep are the best medicines and always reach for these first. I strongly encourage all my patients to be active participants in their care, and I try to engage patients in a discussion regarding all treatment options before making a shared decision how to best proceed. I treat patients in the hospital as well as the clinic. I also enjoy procedures and am able to do quite a few right here in the office from IUD, skin biopsy, joint and tendon injections, as well dry needling to improve chronic tendon pain, lastly I perform vasectomy Thursday evenings. I also enjoy teaching and often work with medical students and residents in clinic. Regardless of the treatment or medical concern almost all my patients leave with a exercise prescription.

How I thrive

As a former professional athlete exercise is critical to my own well-being. I enjoy running, biking, yoga, cooking, spending time with my family as well as involvement in professional medical organizations including the local county medical society as well as California and American Academy of Family Physicians. I am a strong believer that physicians need to take a leadership role in local, state, and national public policy and health advocacy, in order to improve the health of individuals as well as that of our nation.

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My office

Languages spoken by medical staff

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My provider type

Physicians and Surgeons

Medical groups and plans

Southern California Permanente Medical Group

List Header Plans Accepted
  • Exclusive Provider Organization (EPO)
  • HMO
  • Medi-Cal Managed Care
  • Point-of-Service Plan (POS)
  • Senior Advantage/Medicare Cost
Family Practice Department
9961 Sierra Ave, Fontana, CA 92335

Contact information

  • Appointments/information
  • 1-833-574-2273 (1-833-KP4CARE) (toll free)
  • Information
  • 1-866-735-2922 (toll-free TTY for the hearing/speech impaired)

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My training, certifications and licensing

Medical school

University of Vermont School of Medicine
Burlington , VT

Board certification

Family Medicine

American Board of Family Medicine

Sports Medicine

American Board of Family Medicine

Medical training



Duke University Medical Center
Durham , NC


Family Medicine

Kaiser Foundation Hospital
Fontana , CA

Joined Permanente Medical Group


Active license information

License number


License type


License issuing state


National Provider Identifier (NPI)

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My hospitals

All Kaiser Permanente physicians and podiatrists have admitting privileges or the ability to refer patients to our plan hospitals. Admitting privileges of other providers may vary by plan and facility. Contact your plan administrator for details.

9961 Sierra Ave, Fontana, CA 92335

I have admitting privileges at this hospital.

Setting the standard: Measuring care quality in our hospitals(PDF)

2295 S Vineyard Ave, Ontario, CA 91761

I have admitting privileges at this hospital.

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The information in this online directory is updated periodically. The availability of physicians, hospitals, providers, and services may change. Information about a practitioner is provided to us by the practitioner or is obtained as part of the credentialing process. If you have questions, please call us at 1-800-464-4000 (toll free). For the hearing and speech impaired: 1-800-464-4000 (toll free) or TTY 711 (toll free). You can also call the Medical Board of California at 916-263-2382, or visit their website.

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Kaiser Permanente uses the same quality, member experience, or cost-related measures to select practitioners and facilities in Marketplace Silver-tier plans as it does for all other Kaiser Foundation Health Plan (KFHP) products and lines of business.The measures may include, but are not limited to, HEDIS/CAHPS performance, member/patient complaints, patient safety scores, hospital quality measures, and geographic need. Members enrolled in KFHP Marketplace plans have access to all professional, institutional and ancillary health care providers who participate in KFHP plans’ contracted provider network, in accordance with the terms of members’ KFHP plan of coverage. All Kaiser Permanente Medical Group physicians and network physicians are subject to the same quality review processes and certifications.
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