Informational

Data use:

We use cookies and similar tools to make your use of this website easy and to keep it working properly. We may share data about you and how you use the site with third parties, such as analytics and marketing partners. Learn more in our Privacy Policy and Terms of Use. By continuing to use the site, you agree to this.

Health care

We provide affordable and personalized care

How can we help?

Helpful links

Understanding coughs: Types, causes and treatments

More articles

Financial

Accounts to help you save and pay for health care expenses

How can we help?

Helpful links

  • Resources

    Find contribution limits, savings tools, calculators and eligible expenses

  • Account support

    Find contact information and frequently asked questions

Tax season resources

Get ready for HSA tax season

If you used an HSA this year, the HSA Tax Center offers general information about contributions, eligible expenses and commonly used tax forms — all in one place.

Visit the HSA Tax Center

Pharmacy

We make it easy to get medications you need, when and where you need them

How can we help?

Helpful links

  • Optum Rx

    For people with pharmacy insurance benefits through Optum Rx

  • Track orders

    Track your home delivery and specialty order

  • Pharmacy support

    Find contact information and answers to frequently asked questions

Mobile app

Optum Rx on the go

Request refills, track order status, manage billing information and much more.

Download on the App StoreGet it on Google Play

Maria Guadalupe Zambrano Bykowski, NP

4.7 (107 ratings)
Optum Provider

Specialty

Nurse Practitioner

Languages

English

Seeing patients at

Patient Reviews

Patient review summary

Learn about our survey

5

4

3

2

1

4.7

34 reviews

    • Reviewed on Jul 26, 2026
    • Verified Review

    She was very compassionate, dedicated, informative, very caring, mellow and patient!!

    • Reviewed on Jul 22, 2026
    • Verified Review

    She is kind, considerate, compassionate. And she LISTENS TO YOU!!!!!!!!!!! She DOES NOT make you feel like an old person.

    • Reviewed on Jun 23, 2026
    • Verified Review

    She is as responsive as I expect from my own doctor

    • Reviewed on Jun 17, 2026
    • Verified Review

    She is incredibly thorough. She had helped me tremendously with my treatments. Very lucky to have met her.

    • Reviewed on Jun 17, 2026
    • Verified Review

    She make sure to explain everything

    • Reviewed on Jun 12, 2026
    • Verified Review

    Caring and understanding

    • Reviewed on Jun 5, 2026
    • Verified Review

    She was very professional, and helpful.

    • Reviewed on Jun 3, 2026
    • Verified Review

    Seemed in a hurry to move on to next person. Barely looked at my issue and sent me to make a referral appointment. Didn't explain what would happen next, treatments, if I would need time off work or someone to drive me to this next appointment....

    • Reviewed on May 6, 2026
    • Verified Review

    Very through and professional

    • Reviewed on May 1, 2026
    • Verified Review

    Patient friendly answered questions

    • Reviewed on Apr 30, 2026
    • Verified Review

    She was very professional and nice while helping me go through my pre—op testing

    • Reviewed on Apr 29, 2026
    • Verified Review

    She explains medical terms clearly and doesn’t rush the appointment.

    • Reviewed on Apr 22, 2026
    • Verified Review

    She is kind. She LISTENS to you and is concerned about your welfare. She explains things to put you at ease. She really is a very sweet person.

    • Reviewed on Apr 10, 2026
    • Verified Review

    Great NP

    • Reviewed on Apr 5, 2026
    • Verified Review

    She is thee most compassionate, educated, articulate, caring professional I have almost ever met.

    • Reviewed on Apr 1, 2026
    • Verified Review

    She's very thorough, friendly and on top of everything. Extremely pleased with her, I’m a fairly new patient. I’m actually not used to getting such great care, my previous doctor was awful compared to her.

    • Reviewed on Mar 19, 2026
    • Verified Review

    Very good Lupe explains and lessons well to my questions. Responded to my needs about health issues and referrals.

    • Reviewed on Mar 4, 2026
    • Verified Review

    That was my first visit & she checked carefully my health history, medication s that I’m taking including the one that I’m allergic and lab tests that I needed to do.

    • Reviewed on Feb 27, 2026
    • Verified Review

    Very courteous and well informed

    • Reviewed on Feb 16, 2026
    • Verified Review

    She forgot my prescription, please have her get back to me. Please please please

Page 1 of 2

  • About Maria Guadalupe Zambrano Bykowski, NP

    Maria Guadalupe Bykowski, NP-C, is a board-certified nurse practitioner. Maria earned her degree from Georgetown University in Washington D.C. She pursued a career in health care to connect with people on a personal level. She believes in educating her patients to empower them to make good health decisions. Maria works closely with her patients to find solutions to their health problems. She has experience working with women, children and the Latinx community. Maria has treated patients with diabetes and heart health issues. She is approachable, empathetic and a good listener. In her spare time, Maria enjoys cooking and spending time with her family. Maria speaks English and Spanish.

    Gender

    Female

    Board certifications

    Nurse Practitioners Certification Board

    Licenses

    CA, 95011439

    Network Name

    OptumCare HealthCarePartners California

    Hospital affiliations

    OptumCA Hospitalist - Global Physicians,Adventist Health White Memorial

© 2026 Optum, Inc. All rights reserved. Stock photos used.