The Alpha Hormones® Team

Meet Our Medical Providers

Thoughtful care. Lasting connection. Meet the medical providers dedicated to your hormone health, longevity, and quality of life.

Our Approach to Care

Care Begins With Listening

Your symptoms, questions, and goals deserve time and attention. We take the time to understand your health history, explain your options, and involve you in decisions about your care.

Physician-Led Care

Medicine Guided by Science and Personal Connection

Dr. Tek believes the best care begins with understanding the person behind the symptoms. He founded Alpha Hormones® to provide attentive, individualized care informed by clinical evidence, careful listening, and each patient’s long-term health goals.

Leadership

Clinical and Business Leadership

Dr. Tek has held leadership roles across private medical practices and federally qualified health centers in California. For example, as a Medical Director, he has led multidisciplinary teams and supported efforts to improve healthcare access, clinical operations, and care delivery.

His public-health service received commendation from a Los Angeles County Supervisor. In addition, he is a former member of Forbes Business Council and a published Forbes Councils contributor.

Read His Forbes Article
The Practice

Why He Founded Alpha Hormones®

While working with underserved communities, Dr. Tek saw gaps in conventional care. For example, complex symptoms, hormone imbalances, and underlying health concerns could go unrecognized or remain unresolved. These experiences led him to found Alpha Hormones®.

To that end, his vision brings together evidence-based medicine, advanced diagnostics, health optimization, and emerging longevity-focused treatments. The goal is to help patients improve their quality of life, preserve function, and pursue healthier aging.

Clinical Interests

Hormone Health, Peptides and Regenerative Medicine

Dr. Tek’s clinical interests include individualized hormone care, metabolic health, peptide therapy, and regenerative medicine. In addition, he studies advanced imaging, preventive diagnostics, and innovative technologies that may support healthier aging.

He is also interested in the responsible use of artificial intelligence in hormone and longevity medicine. For example, these tools may help identify meaningful clinical patterns and strengthen treatment planning.

Hormone Health for Men and Women
Metabolic Health and Medical Weight Management
Peptide Therapy
Regenerative Medicine
Stem-Cell and Exosome Therapeutics
Advanced Imaging and Preventive Diagnostics
AI-Supported Medicine and Clinical Innovation

Guiding Principle

“My greatest specialty is my dedication to my patients. Exceptional care begins with compassion, attentive listening, and a commitment to evidence-based medicine.”

The Alpha Team

Meet Our Medical Providers

Get to know the experienced, board-certified medical professionals committed to attentive, individualized care throughout your Alpha Hormones® journey.

Monikeo Williamson, board-certified Family Nurse Practitioner
FNP-BC · ABAAHP

Monikeo Williamson

Board-Certified Family Nurse Practitioner

Monikeo’s clinical practice focuses on personalized hormone health, metabolic wellness, integrative care, and longevity-focused medicine.

Professional Biography

At Alpha Hormones®, she works closely with patients to understand their symptoms, health history, laboratory findings, lifestyle, and long-term wellness goals. She uses this information to help develop individualized, evidence-informed care plans designed to support improved health, vitality, and quality of life.

Her background as a Registered Nurse and advanced practice provider contributes to a thoughtful, compassionate approach grounded in patient education, careful listening, and ongoing clinical evaluation.

Education and Certification
  • Houston Christian University: Master’s Degree in Nursing, Family Nurse Practitioner
  • University of Texas Health Science Center at San Antonio: Bachelor of Science in Nursing
  • University of Houston: Undergraduate studies
Outside the Clinic

Outside the clinic, Monikeo enjoys spending time with her young son and her much-loved corgis. She also enjoys strength training, running, and fitness classes.

Kellie Klein, board-certified Physician Assistant
PA-C

Kellie Klein

Board-Certified Physician Assistant

Kellie combines experience in women’s health, reproductive endocrinology, infertility, and food-allergy care with a compassionate whole-person approach.

Professional Biography

Kellie is a Physician Assistant devoted to compassionate, individualized care. She believes healthcare is most effective when patients feel heard, understood, and included in decisions about their treatment.

At Alpha Hormones®, she partners with patients to look beyond symptom management, explore contributing factors, restore balance, and support lasting improvements in quality of life.

Education
  • Midwestern University, Glendale: Master of Science in Physician Assistant Studies
  • Gonzaga University: Bachelor of Science in Human Physiology
Outside the Clinic

Kellie enjoys hiking, traveling, discovering new restaurants, cooking, baking sourdough bread, reading, visiting the beach, and playing volleyball.

Marcus Lee, board-certified Family Nurse Practitioner
FNP-C

Marcus Lee

Board-Certified Family Nurse Practitioner

Marcus brings experience in emergency nursing, primary care, chronic-condition management, functional medicine, and individualized hormone health.

Professional Biography

Marcus began his clinical career as a Registered Nurse in the emergency department at White Memorial Hospital, where he developed strong diagnostic and assessment skills.

He later transitioned into primary care and has supported thousands of patients with chronic-condition management and long-term health improvement. He brings a thoughtful, whole-person perspective to each patient encounter.

Education
  • California State University, Los Angeles: Master’s Degree in Nursing, Family Nurse Practitioner
  • California State University, Los Angeles: Bachelor of Science in Nursing
  • University of Southern California: Bachelor of Science in Business Administration and Information Systems
Outside the Clinic

Marcus is a lifelong learner who enjoys reading, gardening, hiking, camping, surfing, fishing, stargazing, and spending time outdoors with his family.

Julianne Humason, board-certified Family Nurse Practitioner
FNP-BC · ABAAHP

Julianne Humason

Board-Certified Family Nurse Practitioner

Julianne brings experience in primary care, internal medicine, integrative medicine, women’s health, hormone therapy, and longevity-focused care.

Professional Biography

Julianne began her healthcare career as a Registered Nurse, caring for patients in orthopedic and oncology units in Southern California. She became a board-certified Family Nurse Practitioner in 2019.

She is committed to spending meaningful time with patients, listening closely to their concerns, and developing personalized care plans supported by strong therapeutic relationships.

Education
  • University of California, Los Angeles: Master’s Degree in Nursing, Family Nurse Practitioner
  • California State University, Northridge: Bachelor of Science in Nursing
  • University of San Francisco: Bachelor of Science in Biology
Outside the Clinic

Julianne enjoys running, hiking, Peloton workouts, mountain activities, cooking, baking, and spending time with friends, family, and her three nieces.

Common Questions

Our Team FAQs

Who leads Alpha Hormones®?

Rotana Steven Tek, D.O., is the Founder, CEO and Medical Director. He trained in internal medicine and oversees clinical care across the practice.

What is the difference between a D.O., a nurse practitioner and a physician assistant?

A D.O. (Doctor of Osteopathic Medicine) is a fully licensed physician who completed medical school and residency training. Nurse practitioners are advanced-practice nurses with graduate-level clinical training, and physician assistants are licensed clinicians trained in the medical model. At Alpha Hormones®, our NPs and PAs work collaboratively with Dr. Tek, so every plan has physician oversight.

Who else provides care?

Our team includes nurse practitioners and physician assistants who work closely with Dr. Tek to evaluate, treat and monitor patients.

How do providers work together on my care?

Your provider leads your individualized plan, and the team collaborates under Dr. Tek’s medical direction so your care stays consistent from your first visit through follow-up.

Can I request a specific provider?

Yes. You can choose your provider when you book online, or let our team know your preference when you call or text (213) 334-4111. Availability may vary.

Do your providers offer telehealth?

Yes. Our providers see patients in person in Pasadena and by telehealth for patients located in California, Florida or Texas at the time of the visit.

How do I book with the team?

Book online using our scheduler, or call or text (213) 334-4111.

Still have questions? Call or text (213) 334-4111 or email support@alphahormones.com.

Medical Care Designed Around You

Ready to Take the Next Step?

Meet with one of our board-certified providers to discuss your concerns, health goals, and available care options.

Book Your Appointment

In-person and telehealth appointments available