Meet Our Providers

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Founders & Providers

Dr. Gustav Lo, MD

Founder, Chief Medical Officer

During his 30 year career as a Primary Care Physician, Dr. Lo first applied regenerative medical techniques such as PRP injections to orthopedic cases in the early 2000’s; following those successes, he then brought similar techniques to our aesthetic practice. Our results mirrored the research findings in other centers - regenerative techniques can reverse some degenerative conditions and “youthify” our tissues and physiology. With that, he founded RegenCen (a separate division of CSLC) in two northern Michigan locations as a treatment center focused on helping patients age better. RegenCen merges the most proven regenerative therapies with bioidentical hormone programs for men and women, tackling some of the biggest impediments to living well over 50.

Dr. Lo earned his undergraduate degree from the University of Michigan and his MD from Michigan State University. He founded Northern Michigan MedCenter primary care and urgent care centers, operating them for 30 years with over 1 million total patient visits. Since 2009, Dr. Lo has offered treatments at CSLC in liposuction and laser surgery. He has performed over 4000 liposuction procedures in Petoskey and Traverse City and thousands of Laser Lift treatments for aging. The remainder of his professional time as a physician is at RegenCen. He continues seeing patients and offering general anti-aging therapies and regenerative treatments for specific conditions like  erectile dysfunction, arthritis/tendinitis and male testosterone replacement, was well as supervising our Physician Associates who specialize in women’s care.

Under Dr. Lo's guidance and supervision, RegenCen also began to offer a results-proven prescription weight loss program with semagutide, or Ozempic, and the Skinny Shot as well as NAD+ therapy to help patients lose unwanted weight and keep it off.

As regenerative medicine continues to advance, Dr. Lo and his team are dedicated to the “youthification” of our clients, bringing exciting, scientifically proven treatments to patients in Traverse City and Petoskey who want to look, feel, and live better at every stage of life.

Ambyr worked alongside Dr. Gustav Lo for over a decade in primary care and urgent care prior to joining CSLC. At CSLC in Petoskey and Traverse City, Ambyr immediately puts patients at ease with her outgoing, friendly smile. Ambyr is experienced and certified in all of InMode women’s health technology, Coolsculpting, Morpheus8 and laser hair removal. She also assists Dr. Lo’s liposuction cases on the regenerative medical side, RegenCen. Ambyr loves being able to help people feel their best.

Wendy Najarian, PA-C

Regencen & Cslc Master Provider, Medical Lead

Wendy Najarian is a Physician Assistant and Medical Lead in our Bloomfield Hills, MI location.

She earned her Bachelor of Science at The University of Michigan In Ann Arbor and received her Masters in Physician Assistant Studies from Wayne State University in Detroit. After working in Internal Medicine and Dermatology, Wendy has brought her expertise and experience to CSLC / RegenCen.

Wendy's passion for this industry stems from the reward of helping others achieve the harmony of feeling their healthy youthful self on both the inside and outside so life can be more enjoyable. She is a caring and thoughtful provider who is experienced in discussing and creating optimized treatment plans for an individual to achieve both their regenerative and aesthetic goals.

Wendy currently resides in Bloomfield HIlls. In her free time, she enjoys playing tennis, golf and traveling with family and friends.

Hannah Lipsch

Regencen & Cslc Master Provider, Master Injector

Hannah Lipsch, PA-C holds her Master’s degree from Florida State University College of Medicine Physician Assistant Program in Tallahassee, FL, and her Bachelor's degree in Health Sciences from the University of South Florida in St. Petersburg, FL.

Prior to joining us as our CSLC & RegenCen Master Provider, and Master Injector, Hannah had a wealth of clinical experience in Medical and Cosmetic Dermatology, Family Medicine, Internal Medicine, Women’s Health, Emergency Medicine, General Surgery, Geriatrics, Pediatrics, and Psychiatry. She also worked as a Patient Care Technician in a Progressive Care Unit.

Hannah is passionate about providing a comfortable environment where patients can come to seek treatments that will make them feeling like the best versions of themselves. She is compassionate, trustworthy, and fully dedicated to helping patients gain confidence and function better through every stage of life.

Outside of the office, you'll find Hannah enjoying time with friends, family, and her two Golden Retrievers, trying out new coffee shops, or enjoying time at the beach.

Book your complimentary consultation or treatment with Hannah in our Sarasota office today.

Crystal Kherkher, PA-C

Aesthetic & Regenerative Master Provider, Master Injector, Lead Aesthetic Consultant

Crystal Kherkher, PA-C is from From Troy, Michigan. She graduated from Oakland University with a Health Science Bachelors in Rochester, Michigan, then graduated with her Masters in Physician Assistant Studies from Midwestern University in Downers Grove, Illinois.

Crystal worked at a top 10 Allergan account in Southern California, then transitioned to Northern California as a Lead Clinician for a Plastic Surgery and Dermatology practice.

She loves combining medicine with aesthetics and being able to positively directly impact peoples self-confidence, and her strengths are full facial and body balancing as well as skin rejuvenation treatments.

Outside of the office, Crystal enjoys working out, playing all sports, traveling, going to concerts and spending time with loved ones.

Katie Enos

Katie Enos, PA-C is our Master Provider and Injector in our Naples and North Naples offices. She's from Derry, Pennsylvania. She graduated with her Bachelor of Science in Public Health and went on to complete her Master of Physician Assistant Studies degree at Slippy Rock University.

After graduating, she completed a specialized theoretical and practical fellowship training in the field of aesthetic plastic surgery with surgeons Dr. Armando Davila and Dr. Dennis Hurwitz.

Katie has vast experience with PRF and vaginal rejuvenation. She loves her career and being able to help patients feel their best and achieve their aesthetic goals.

Outside of the office, you'll find Katie enjoying time with family and friends, going to the beach, and traveling.

Kayla Patnode, PA-C

Regenerative Medicine, Bioidentical Hormone & Weight Loss Specialist

Kayla Patnode, PA-C, our CSLC and RegenCen Master Provider, graduated with a Bachelor's of Science in Kinesiology with a minor in health promotion from Michigan State University. She graduated from Mary Baldwin University, Murphy Deming College of Health Sciences with Masters in Physician Assistant Studies.

She worked previously worked as a Certified Nursing Assistant (CNA) at a nursing home and rehabilitation facility in Lansing, MI and as a Medical Assistant (MA) in a dermatology office in Novi, MI. Kayla completed a PA school rotation in Lansing, MI where she was trained in treating varicose veins, acne, and hormone replacement therapy.

Kayla enjoys helping patients feel more confident and assisting with making their “ideal self” match what they see in the mirror. She loves our regenerative services for helping patients continue to feel like themselves as they move through the journey of life.

Outside of the office, you'll find Kayla waterskiing (she competed on the Michigan State University waterski team for 4 years and was the first female to serve as men’s captain of the team), disc golf, hiking, and camping.

Katherine Hillig, NP

Regencen & Cslc Master Provider, Master Injector

I am so excited to be working with Dr Howlin and Holly at Chelsea Laser and Aesthetics offering filler and neurotoxin treatments. I specialize in brow lifts, the dreaded ‘11s’, crows feet, lip flips and reversing signs of aging with discreet yet effective use of fillers in the cheeks, chin, hands and lips. After training under Dr Howlin, I follow her ‘less is more’ philosophy, with natural and stunning results.

I also offer health and wellness coaching. This is a physician led, science based “Optavia” program addressing life long changes in health habits. We focus on achieving optimal health: healthy weight, balanced nutrition, increased energy and sleep quality while reducing inflammation.

I'm originally from New Zealand but recently relocated from Colorado with my husband and two boys to be closer to our family. We are loving all that Michigan has to offer, particularly in the summer!

Megan Marzec, APRN-CNP

Regencen & Cslc Master Provider, Master Injector

Megan is from Toledo, Ohio and is our Master Regenerative Medicine Provider and Injector in our Ann Arbor office. She graduated with her BSN from The University of Toledo in and started her career as an RN in the ICU at Toledo Hospital. She graduated with her Master of Science in Nursing from Walden University and began pursuing her dream career as an aesthetic nurse practitioner.

She enjoys her career in aesthetic and regenerative medicine because it is the perfect blend of her two passions: the opportunity to take care of aging patients combined with her artistic skills/passion for skincare. Megan loves helping others carry themselves more confidently and feel more beautiful in their own skin.

We're grateful to have Megan on our team with her outstanding leadership abilities, dedication to our team, detail orientation, abilitiy to adapt with our growth, and her focus on team goals.

Outside of the office, Megan loves traveling, hiking, photography, cycling, running, and spending time with her nieces + nephews.

Samiha Rahman, PA-C

Regenerative Medicine Specialist

Samiha Rahman, PA-C is our Florida Regenerative Medicine, Bioidentical Hormone & Medical Weight Loss Specialist.

She earned her Master of Medical Science in Physician Assistant Studies from Nova Southeastern University in Orlando, FL and her Bachelor of Health Science from University of Florida in Gainesville, FL.

She worked as a Certified Nursing Assistant at UF Health Physical Rehabilitation Center, completed dermatology-focused clinical rotations, and uses her knowledge to help patients make the best decisions regarding their aesthetic and regenerative health treatments.

Samiha loves this industry for the opportunity to consult with patients about ways to improve their lifestyle and then getting the chance to be a part of their journey to optimize the way they look on the outside and feel on the inside.

She is empathetic and positive, caring, and easy to talk to, which our patients (and our staff!) love about her. She will make you feel both comfortable and educated during your visits to CSLC / RegenCen.

During her free time, Samiha loves going to theme parks, watching the most beautiful Florida sunsets on the beach, and trying new cuisines.

Amanda Rapanos, PA-C

Clinical Director And Medical Lead

Shauna Stark, DNP-BC

Doctor Of Nursing Practitioner, Regenerative Specialist

Shauna Stark, DNP-BC joined RegenCen as our Doctor of Nursing Practice in our Petoskey, Michigan office in 2023. She holds her DNP and BSN from the University of Michigan-Flint, her BS in Biology from University of Detroit Mercy, and also obtained her EMT before pursuing nursing. She is a current standing Professor of Graduate Pathophysiology at her alma mater, University of Michigan-Flint.

She uses her extensive medical expertise to practice as a well-rounded, proficient, and trustworthy provider and aesthetic treatment consultant. Prior to discovering her passion for the industries and launching her career in Regenerative Medicine and Aesthetics, Shauna worked in Critical and Acute Care at McLaren. She has traveled internationally to Kenya, Cambodia, and the Dominican Republic as a provider and educational lead with the University to educate nursing students and help patients worldwide.

As a compassionate individual and talented provider in every facet of the industry, she is proud to help extend the healthspan of RegenCen patients. Shauna is passionate about travel and art. In her spare time, she enjoys spending time with her husband and golden retriever, being outside and drawing.

At RegenCen, Shauna offers:

  • PRF (platelet-rich fibrin) injections
  • Feminine or vaginal rejuvenation
  • Hormone replacement
  • IV therapy
  • Complimentary regenerative consultations

Anna Donaghy, NP-C

Regencen Feminine Rejuvenation, Weight Loss & Hormone Expert

Anna treats patients full time in our Traverse City and Petoskey location. Anna received her RN and MSN at Michigan State University. After her board certification as a Nurse Practitioner, Anna spent 6 years practicing in women’s health and family practice prior to joining RegenCen.

Anna is certified in Biote Pellets and helps men and women with hormone optimization and NAD+ infusions. She also provides regenerative platelet-rich fibrin (PRF) joint injections and tendonitis treatments, hair rejuvenation treatments, and vaginal rejuvenation. She supervises the weight loss program in Traverse City and Petoskey.

Anna immediately puts patients at ease with her warm, outgoing personality. Her favorite part of her job? “After years of hearing women discuss the disheartening changes that happen with childbirth, menopause, and aging, I feel so fortunate to offer treatments for dryness, bladder control, and sexual changes that work. Women are so grateful to feel normal again.”

In her free time, Anna enjoys sailing on her Sunfish and photography.

Andrea Dunklow, NP-C

Master Injector, Medical Lead, Regenerative Medicine Specialist

Bio coming soon!