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Dr. John Stasiewicz, MD

Dr. John Stasiewicz, MD

General Practice (Nurse Practitioner)*
50+ years of experience

Dr. John Stasiewicz, MD is a general practice nurse practitioner in Irvine, CA and has over 50 years of experience in the medical field. He graduated from Medical College of Wisconsin in 1970. He is affiliated with MemorialCare Saddleback Medical Center. He is not accepting new patients.

4.9 Star Rating
Based on 76 reviews 4.9 Star Rating (76 reviews)

Practice

4050 Barranca Pkwy Ste 200 Irvine, CA 92604
Telehealth available

At a Glance

  • Explains Conditions Well
    Patients said this doctor explains conditions well. See reviews
  • Offers Telehealth
    This doctor offers telehealth appointments. Call the office to schedule an appointment.
  • Practices at Top Hospital
    America's 250 Best Hospitals Award™ See hospitals
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Dr. Stasiewicz's Reviews

Likelihood to recommend Dr. Stasiewicz

4.9
76 ratings, 67 with a written review
5 star
99%
99%
4 star
0%
0%
3 star
0%
0%
2 star
0%
0%
1 star
1%
1%

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Great visit
He listens and takes his time to assess the issue
What went well
  • I felt respected
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Apr 23, 2025
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#1 Doctor Primary Care Orange County
Dr. Stasiewicz took me into his office with my brother & listened to my ordeal at the Hospital & Post Acute Facility. He listens intently & goes over your medical condition to chart the best recovery for you. He makes you feel that he is concerned & is a part of your life that is very trying & difficult. I have known Dr. Stasiewicz for years and is very compassionate toward his patients!
What went well
  • I felt respected
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
1 other person found this helpful
Helpful
Apr 17, 2025
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Excellent doctor
D Stasiewicz has been our family doctor for over 30 years. We trust and believe in him without question.
What went well
  • I felt respected
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Jan 11, 2025
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Numero Uno
Dr. S is the Michael Jordan of Doctors. He is knowledgeable, personable, and always has your best interest at heart. This man is loved by my entire family!
What went well
  • I felt respected
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Jim the K – Oct 22, 2024
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The best doctor there is!
Dr. Staz is thorough, knowledgeable, kind and gives a great sense of calmness. You can not find a better doctor!
What went well
  • I felt respected
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Caroline – Oct 14, 2024
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Dr. Stas is AWESOME!
Dr. Stas is AWESOME! Kind, honest, highly knowledgeable and incredibly competent.
What went well
  • I felt respected
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Lisa Young – Sep 05, 2024
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Heartily recommend!
Dr. Stasiewicz is amazing…caring and always a joy to see. He’s incredibly thorough and asks the questions that I didn’t even think needed to be asked. He remembers previous health issues I’ve had and follows up to see how I’m doing. He always reminds me to schedule my women’s well check appointments and gives advice on keeping healthy, both mentally and physically. Dr. Stasiewicz has been my doctor for over 34 years…since I was in my mid-twenties, single, and looking for a primary care doctor. Dr. Stasiewicz checked all the boxes then and continues to check all the boxes now. I highly recommend him!
What went well
  • I felt respected
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Jenny – Jun 25, 2024
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Best Dr. ever.
Dr. Is very good in assessing the issue and always has the best solution. Very caring, thorough, and listens. He also is the nicest person.
What went well
  • I felt respected
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Jun 05, 2024
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Excellent!
Excellent Doctor! He has always been there for us! Very caring !
What went well
  • I felt respected
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Apr 25, 2024
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outstanding doctor
Telehealth
He is an extremely knowledgeable and sincerely caring doctor. I highly recommend him. I truly believe anyone who sees him will not be disappointed
What went well
  • I felt respected
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
1 other person found this helpful
Helpful
Wanda Ashby – Feb 28, 2024
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Great doctor!
Dr. Staciewicz always provides good advice and treatment appropriate to my condition.
What went well
  • I felt respected
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
djinoc – Nov 16, 2023
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The greatest
Dr. Staz is Muhammad Ali of doctors… he’s the greatest.
What went well
No results
What could be improved
No results
Helpful
May 23, 2023
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Dr. Stas is an outstanding doctor who I have been seeing for the last 20 years. I recommend him to anyone who asks me for a referral.
What went well
No results
What could be improved
No results
Helpful
LGW – Dec 17, 2022
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Dr. Staz has been my doctor for over 20 years. He
Dr. Staz has been my doctor for over 20 years. He listens and truly cares. He is a phenomenal doctor. I’m truly great full that he is my primary care physician.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Sep 02, 2022
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Dr. Stas is an excellent doctor! He is a patient listener and very caring!
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
1 other person found this helpful
Helpful
Aug 19, 2022
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Dr. John Stasiewicz is my doctor for many years . I never go to another doctor but him . He spent his precious time going over every detail with me . He is a loving and caring human being .
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
1 other person found this helpful
Helpful
Soussan Pourreza – Apr 14, 2022
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Dr. Stasiewicz was attentive, kind, and thorough during my visit. I can't ask for a better physician. Thank you, Doc!
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Patrick L. – Mar 16, 2022
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Best Doctor alive
They don’t make doctors like Dr. Staz anymore. Not only is he extremely knowledgeable and intelligent, he takes the time and talks to me every visit. Most drs just stare at their screen and type when I talk to them nowadays. He never keeps me waiting in the treatment room either. He is a family man with a warm heart of gold and this pours over into his love of medicine. Dr. Staz is a national treasure and we should all be so lucky to have doctors like him available. Thank you for keeping me alive and healthy, Dr. Staz!
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
1 other person found this helpful
Helpful
Mar 04, 2022
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Dr Stasiewicz is professional, knowledgeable and trustworthy. He’s been my primary physician for 30 years. I highly recommend him.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Feb 24, 2022
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Very knowledgeable and takes the time to explain test results. Great interaction and sincere about the patient's health and life style.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Peter – Sep 03, 2021
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About Me

Watch Dr. Stasiewicz's Video

biography

John Stasiewicz is board certified in Family Medicine with MemorialCare Medical Group, and currently works in Irvine, California.

MemorialCare Medical Group is an award-winning team of health care professionals dedicated to providing...
read more
  • General Practice (Nurse Practitioner)

*Healthgrades does not verify qualifications for medical specialties. Please verify your provider's specialty and qualifications directly with your provider and applicable medical board.

  • University Of California Irvine Medical Center

    Residency Hospital, 1977
  • Los Angeles County - Usc Medical Center

    Internship Hospital, 1971
  • University Southern California Medical Center Los Angeles County

    Internship Hospital, 1971
  • Medical College Of Wisconsin

    Medical School, 1970
For detailed information about any of the below board actions, please search for the provider's records on the linked state licensing board or the Federation of State Medical Boards. To learn more about the difference between these sources, please refer to our FAQs.
Healthgrades has not received any data indicating a board action exists for this provider.

Locations

Practice

MemorialCare Medical Group Inc.4050 Barranca Pkwy Ste 200 Irvine, CA 92604
1
  • Call
  • Fax
  • Hours
    • Mon: 9:00am - 5:00pm
    • Tue: 9:00am - 5:00pm
    • Wed: 9:00am - 5:00pm
    • Sat: 9:00am - 5:00pm
    • Sun: 9:00am - 5:00pm
  • Directions

Practice

Bristol Park Medical Group Inc722 Baker St Costa Mesa, CA 92626
2
  • Call
  • Fax
  • Hours
    • Mon: 8:00am - 5:00pm
    • Tue: 8:00am - 5:00pm
    • Wed: 8:00am - 5:00pm
    • Thu: 8:00am - 5:00pm
    • Fri: 8:00am - 5:00pm
    • Sat: closed
    • Sun: closed
  • Directions

Practice

MemorialCare Medical Group Fountain Valley11420 Warner Ave Fountain Valley, CA 92708
3
  • Call
  • Fax
  • Hours
    • Mon: 8:00am - 5:00pm
    • Tue: 8:00am - 5:00pm
    • Wed: 8:00am - 5:00pm
    • Thu: 8:00am - 5:00pm
    • Fri: 8:00am - 5:00pm
    • Sat: closed
    • Sun: closed
  • Directions

Practice

MemorialCare Medical Group Inc.23512 Madero Mission Viejo, CA 92691
4
  • Call
  • Fax
  • Hours
    • Mon: 8:00am - 5:00pm
    • Tue: 8:00am - 5:00pm
    • Wed: 8:00am - 5:00pm
    • Thu: 8:00am - 5:00pm
    • Fri: 8:00am - 5:00pm
  • Directions

Affiliated Hospitals

  • MemorialCare Saddleback Medical Center

    24451 Health Center Dr
    Laguna Hills, CA 92653
    Recipient of 25
    hospital awards

    America's 250 Best Hospitals Award™ (2025, 2024, 2023)

    Top in the nation for providing excellence in patient safety by preventing infections, medical errors, and other preventable complications

    Patient Safety Excellence Award™ (2025, 2024)

    Top in the nation for providing excellence in patient safety by preventing infections, medical errors, and other preventable complications

    View all awards

    How patients felt about the care they received at this hospital.

    86%
    Patients said they were given information about recovering at home

    2% higher than the national average

    77%
    Patients said that doctors always listened to them and explained things well

    1% higher than the national average

    View all patient feedback
Learn more about how Healthgrades measures Hospital Quality