6645 E 22nd St, Tucson, AZ 85710Fax (520) 745-8729

About Lifeline

A small Tucson practice with a big heart.

Lifeline Chiropractic is built around gentle, comprehensive care, careful listening, and finding the underlying cause of health problems whenever possible — not simply covering up pain.

The Practice

Thoughtful care, not a quick assembly line.

Lifeline Chiropractic is a provider of comprehensive and gentle healthcare designed to correct the underlying cause or causes of health problems, not to simply cover up the pain.

Treating the cause of simple health problems such as neck pain, abdominal bloating, headaches, and back pain is not always simple. That is why many common health problems are only covered up with medication instead of being fully understood.

With a thoughtful, holistic approach, the cause of a health problem can often be found by knowing a patient's history and performing appropriate examinations and tests.

Healthy longevity is another area of focus at Lifeline. It requires paying attention to hydration, posture, rest, body use, thought awareness, and several other factors that help individuals move toward optimum health and healthy longevity.

What makes the experience different?

Dr. Penniston uses knowledge and techniques from chiropractic, medicine, applied kinesiology, nutrition, physical therapy, cranial sacral therapy, and other sources to care for a wide range of health conditions.

Of course, Dr. Penniston cannot effectively treat every problem. If he feels he cannot best serve your needs, he will do his best to refer you to someone who can.

Personal care

Patients are treated like individuals, not numbers on a schedule.

Long-term thinking

The goal is to understand what may be keeping the issue alive.

Small-office warmth

A local Tucson practice where patients can feel known and cared for.

Professional headshot of Dr. Gregory Penniston at Lifeline Chiropractic
Dr. Gregory Penniston cycling outdoors with his wife and dogs

Meet the Doctor

Dr. Gregory K. Penniston, D.C.

Dr. Penniston has spent more than four decades helping Tucson patients understand why pain keeps returning and what can be done to support long-term relief. He graduated magna cum laude from Sherman College of Chiropractic in 1980, began practice in 1982, and opened Lifeline Chiropractic in Tucson in 1983. He brings a calm, experienced, and practical approach to care. His goal is not to rush patients through a one-size-fits-all adjustment, but to understand the bigger picture: posture, muscle balance, joint alignment, nutrition, lifestyle, stress, hydration, sleep, and body mechanics. Outside the office, Dr. Penniston has long valued movement and healthy living, including cycling, hiking, trail running, and snowboarding. That personal commitment to health is reflected in the way Lifeline Chiropractic approaches patient care: natural methods, thoughtful evaluation, and long-term maintenance whenever possible.

Our Philosophy

Correct the cause, not just the pain.

Lifeline Chiropractic was built around comprehensive and gentle care designed to identify underlying causes whenever possible. That may include posture, muscle imbalance, joint alignment, hydration, nutrition, stress, sleep, lifestyle, and body mechanics.

Patients often notice a big difference in the way Dr. Penniston approaches their health conditions compared with many traditional or alternative providers. The goal is to look deeper, explain clearly, and help the patient understand the process.

A small office where people matter.

From the first phone call to the visit itself, Lifeline's goal is to make patients feel heard, understood, and supported.

This is a local practice with a long history in Tucson, and that small-business warmth is part of what makes the office feel different.

Our Team

The people helping the office feel like Lifeline.

Dr. Gregory K. Penniston, D.C.

Chiropractor · Founder of Lifeline Chiropractic

Dr. Penniston has served Tucson patients since opening Lifeline Chiropractic in 1983. His care focuses on gentle, comprehensive evaluation and finding the underlying causes of pain and dysfunction whenever possible.

Brandi Lester

Office Manager · Certified Chiropractic Assistant

Brandi Lester, Office Manager · Certified Chiropractic Assistant Brandi grew up in Oceana, a small town in southern West Virginia. She graduated valedictorian from Oceana High School and started working at a pharmacy while she was still in school, where she discovered how much she enjoyed working with people. Her career has included retail, hospitals, and in-and-out office pharmacies. She has worked as a lead technician, regular technician, pharmacy manager, and pharmacy regional manager, giving her extensive knowledge of insurance programs and patient support. At Lifeline, Brandi works diligently to help patients with scheduling, paperwork, insurance information, and the everyday questions that come up before and during care. She strives to make every patient feel like an individual and like family when they come to Lifeline. Outside the office, Brandi enjoys being at home with her sphynx, Onna, watching movies, listening to podcasts and YouTube, and makeup is one of her passions.

CallTextSchedule
4.9★ Google Reviews