Alexander Gregory Hayden, MD

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My specialty:
Hematology and Oncology

My affiliation:
Kaiser Permanente provider

I speak: English

My gender: Male

Where I practice

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About me

I am originally from Indiana and completed my undergraduate and medical school education at Indiana University. I then moved to the great state of Colorado to complete an internal medicine residency followed by a Hematology and Oncology fellowship at the University of Colorado. After completing training, I was delighted to join the exceptional group of medical oncologists at Kaiser Permanente.

 

About my practice

 

I consider it an immense privilege to enter into the lives of my patients as they navigate the highs and lows of their healthcare journeys. I strive to provide high-level, compassionate care by addressing patient’s primary hematologic or oncologic conditions while also treating the whole person by considering social, mental health, cultural, and other factors that may impact their care decisions. Oncology is a particularly dynamic specialty, and I am continually inspired by the many evolving new therapeutics that promise to improve the lives of the patients I serve. I believe in empowering my patients with the latest clinical trials and other evidence-based advances so they can make informed decisions on their personalized treatment plan.

 

My Cancer Subspecialty Focus

 

I provide care to patients across all cancer types and hematologic conditions with a special interest in gastrointestinal cancers, breast cancer, myeloma, genitourinary cancers, lymphoma, and central nervous system malignancies.

 

Collaboration on Multidisciplinary Teams

 

I work closely with a multidisciplinary team of experts within the fields of radiation oncology, surgery, pathology, radiology, and palliative care among other specialties. These teams allow us to provide high-level, evidence-based care tailored to each patient’s clinical needs.

 

Research & Clinical Trials Involvement

 

I participate in several National Cancer Institute–supported clinical research networks, including the SWOG Cancer Research Network, National Surgical Adjuvant Breast and Bowel Project (NSABP), Alliance for Clinical Trials in Oncology, and NRG Oncology. As a sub-investigator on multiple clinical trials, I help bring forward new and promising therapies for patients in our community. I am also committed to research in cancer survivorship, aiming to improve long-term health, reduce recurrence risk, and enhance quality of life beyond treatment.

 

How I thrive

 

Outside of work I thrive through spending quality time with my wife and our beloved dog Rory, along with our family and friends. I also love exploring all of the wonderful activities and unique places Colorado has to offer. I particularly enjoy gardening, golfing, hiking, and skiing.

My office

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My training, certifications & licensing

Medical school

Indiana University School of Medicine
Indianapolis , IN

Board certification

Internal Medicine

American Board of Internal Medicine

To verify board certification for an individual practitioner, please visit the American Board of Medical Specialties, the American Medical Association, or the American Osteopathic Association websites.

Medical training

Fellowship

Oncology & Hematology

University of Colorado School of Medicine
Aurora , CO

Residency

Internal Medicine

University of Colorado School of Medicine
Aurora , CO

Joined Permanente Medical Group

2026

Provider ID

029788

My hospitals

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This page was last updated on: 10/19/2026