4003 Creekside Loop,
Yakima, WA 98908 Map this address

(509) 248-3263 Fax: (509) 225-2702 0

Monday to Friday, 8 a.m. to 5 p.m.

Our Providers

Christopher Catton

Christopher Catton, MD
Associate Medical Director

Medical School: University of Washington 1989

Residency: Internal Medicine Spokane 1992

Board Certification: American Board of Internal Medicine

Growing up as the son of an Air Force jet pilot allowed me to live in 12 different cities in my first 11 years of life. When my dad retired in 1974 we moved to Spokane, Washington, and I established roots in the Pacific Northwest. I met my wife Geri while in medical school and after residency we moved to Yakima where we are raising our five children and one golden retriever. I enjoy coaching my sons' baseball and basketball teams as well as attending my daughters' dance recitals. For our first 11 years in Yakima I enjoyed a "traditional" internal medicine practice. Five years ago, I transitioned to hospital medicine as one of the founding physicians of our growing hospitalist team. The small town feel and family friendly culture coupled with its close proximity to Seattle makes Yakima a great place to live, raise a family and practice medicine.

David Doornink, MD

David Doornink, MD

David Doornink has been an internist at Cornerstone Medical Clinic ever since he graduated from medical school. He has an appreciation for the effects of disease on people and how as a physician he can help people deal with an illness. David likes getting to know his patients, understanding their likes and dislikes while helping them solve their health problems. As a resident of Yakima, David enjoys outdoor activities and has done quite a bit of backpacking in the Cascades.

What inspired you to choose medicine as a career?
I had originally planned on becoming an engineer, but I quickly fell in love with life sciences and changed my major to zoology. I had actually planned on avoiding medicine as a career primarily because my father was a physician and I felt that I did not want to automatically follow in his footsteps. But fairly quickly, I fell in love with life sciences and began to seriously consider medicine as a career. Once I got into medical school, I developed an appreciation of the effects of disease on real people and wanted to learn what it was that we as providers could do to help people deal with human illness.

Do you have a philosophy or approach to working with patients?
First off, I think patients are certainly looking for competence in a physician. But more than that, patients want and need empathy. They want a physician that they believe is listening carefully to their concerns and is looking for the answer to their problems as keenly and as eagerly as if that were the physician's own problem. They want a physician who will identify with their problem and not just be there because it's their job, but be there because they want the patient to get better as badly as the patient does.

What do you appreciate most about the doctors and staff you work with?
From the time I came to Yakima thirty years ago, I've always appreciated Virginia Mason Memorial's culture and Memorial's approach to the treatment of individuals. When I first came to Yakima, Memorial's administrator Rick Linneweh sat down with the new physicians, ate lunch with us and talked to us about Virginia Mason Memorial's commitment to the community. That immediately impressed me. Since that time, Virginia Mason Memorial has continued to have a culture of community service and has gone to a lot of effort and even expense to develop a teamwork approach within the organization that I think has been really good for this community.

What do you like about Yakima?
One thing I've always valued about practicing medicine in Yakima is the congeniality of the relationships between providers here. I've spoken to many of my classmates and physicians with whom I've done postgraduate training and discussed with them their practice situations. Many of them have been involved in practices where there was a great deal of distrust within the hospital staff. In this community, even though there may be differences of opinion on how problems should be handled, physicians get along very well. It makes practicing here a lot more fun.

Tell me a little known fact about you or talk about what you like to do outside of work.
One thing I've enjoyed about living in Yakima has been the opportunities for outdoor sports. My family and I have done a lot of backpacking and hiking in the Cascades. It's been great living in a place that has great access to scenic areas and hiking opportunities. Also, music has been a large part of our family's life. Everything from classical music to bluegrass music has emanated from our home.

When you retire, what would you like to be remembered for?
I don't look forward to retirement because I enjoy what I do too much to think about retirement right now, but I know that day will eventually come. When I do retire I'd like to be remembered as the physician who took the extra time to listen to what patients had to say. I think it's really as simple as that.

Alexander Ho, MD

Alexander Ho, MD

Medical school: Doctor of Medicine, St. George's University, Grenada, West Indies, 2015

Residency: Internal Medicine, Chief Resident, Norwalk Hospital, Norwalk, Conn.; Norwalk Hospital/Yale, New Haven, Conn., 2019

What inspired you to choose medicine? I studied physiology and immunology, and after college I worked in a lab, which is what I was going to do -- pursue academic research. One of my jobs, though, was to talk to patients. I loved it and decided to go to medical school.

Why did you choose your specialty? I enjoy internal medicine because it's the most diverse. I enjoy taking care of people with a lot of different types of problems.

What is your philosophy of care? I like to partner with the patient and come to decisions that we both agree on. I enjoy balancing the risks and benefits with every decision we make and to educate my patients.

What do you like about Yakima? My wife and I really like outdoors activities. I'm originally Vancouver, Canada, and she's from Victoria, so we're closer to home.

What do you like to do outside of work? We enjoy hiking, skiing, bike riding, swimming.

Caolae Jones, ARNP

Caolae Jones, ARNP

Education: Doctor of Nursing Practice, Clarke University, Dubuque, Iowa, 2014-2017

What inspired you to choose medicine?  I wanted to be able to help people heal holistically. What I love about practicing medicine is treating the whole person, mentally and physically. When I was 12 my dad had a massive stroke that paralyzed him on one side. I spent a lot of time following the doctors and nurses, and then taking care of my dad when he got home.

Why did you choose your specialty? To be honest, the specialty chose me. I’ve really enjoyed working with the older population and their chronic diseases.

What is your philosophy of care? The easiest way to put is, I want to practice almost servant leadership when it comes to health care: I want to talk to my patients and find out what’s important to them and help them reach their goals in health care. I’ve learned to cook with Stevia and low-carb foods, because when I want my patients to do that, I’m experiencing thatt, too. It gives you empathy.

What do you like about Yakima? I’ve been really impressed with the small-town atmosphere even in a city of this size. I was kind of sad to be leaving Wisconsin and the beautiful Midwest, but there’s also a beautiful fall here.

What do you like to do outside of work? I love baking, reading and hiking. And I love hanging out with my husband and my dog.  

Sean Hancock, PA-C

Sean Hancock, PA-C

Education: Master of Science in Physician Assistant Studies, Heritage University.; Bachelor of Arts/Liberal Arts, Excelsior College; General Studies, Florida State College at Jacksonville.  

What inspired you to choose medicine? I got an EMT book at a yard sale when I was about 10 years old, and that was it, I was hooked. And I became an EMT in the Navy.

Why did you choose your specialty? While I was in the Navy I enjoyed seeing patients. I worked under the physician assistants, and I wanted to gather information from people and be able to help them.

What is your philosophy of care? Treat every patient the same whether they’re somebody coming in off the street or a CEO, you’re still a patient and I’m going to give you the best care that I can.

What do you like about Yakima? I like that it looks very much where I grew up in southern Arizona. The only thing missing is the cactus, but we’ve got the hills and the brush.

What do you like to do outside of work? I like teaching. I teach one day a week at Heritage University for the PA program. I like kayaking, hiking and shooting at the range; spending time with my wife and our four cats.

Silvia Labes, MD

Silvia Labes, MD

From a very young age, Silvia Labes had a desire to care for others. As an internist at Memorial Cornerstone Medicine for nearly 10 years, she believes deeply in preventive care and focuses on keeping patients healthy while educating and empowering them. Silvia is an avid runner, loves the outdoors and is a devoted mother who wants to be remembered for helping others live better, healthier and happier lives.

What inspired you to choose medicine as a career?
Since I was a little girl playing with dolls, I would always pretend that they were sick and I was taking care of them, so I guess I always had that in me - to take care of people who are not well and try to alleviate their suffering.

Do you have a philosophy or approach to working with patients?
I deeply believe in preventive care, focusing on staying healthy, educating and empowering patients to take charge of their health. When they get sick, I treat them like my own family, giving them the best advice, balancing the pros and cons of all the treatments that are available.

What do you appreciate most about the doctors and staff you work with?
My partners and staff have always been supportive. I have been with my Cornerstone Medical Group family for nearly 10 years and they've supported me through happy moments, like having my second baby, but also challenging times like fighting breast cancer. They were behind me all the way, helping, cheering and encouraging.

Tell me a little known fact about you or talk about what you like to do outside of work.
I love physical activity - running--I ran my first ½ marathon last November in Seattle-- tennis--I am an active member of the Yakima Tennis Club, skiing, hiking, biking and really any outdoor activity. I love being surrounded by nature. I treasure my time with my family and I love following my kids Emma and Alex at their school and with their activities. I like to cook and try new recipes and most of the time the results are great, but don't ask my family about that, you might get a different answer.

When you retire, what would you like to be remembered for?
I would like to know that I made a difference in people's lives by helping them live better, healthier and happier lives. I also hope to have made a difference by alleviating pain and helping patients cross difficult moments in life, and in the end help them pass with dignity and peace. I am not a hero and I do not want to be one. I would like to know that when my name comes up people smile and feel well.

Gabriel Lascar MD

Gabriel Lascar, MD

Medical school: Carol Davila University, Bucharest, Romania

Residency: Huron Hospital - Cleveland Clinic Health Systems, Cleveland, Ohio

What inspired you to choose medicine?  I like people. I enjoy being with them. I always wanted a career where I would be working with people. My parents were engineers, but I found that too impersonal for myself. Patients complete my day.

Why did you choose your specialty? I wanted to go into psychiatry, but, I decided to follow my wife along the Internal Medicine path.

What is your philosophy of care? I always feel like the patient and I are in this together. It always goes both ways, I learn from them and they learn from me. But we are always in the same boat.

What do you like about Yakima? When I got here, I never thought I’d still be here 20 years later, but it’s a real community.  I like that it is a small place, and I hope it stays small. I like to hike, fish, and camp and go out.

How do you feel about Cornerstone?   My co-workers embody commitment; they love their work and stay dedicated. Chronic care feeds my passion for health care: I am my patients’ caregiver; I’ve cared for some of them for more than 15 years. It’s a relationship that keeps me going. 

Timothy L. Melhorn, MD, MMM, CPE

Timothy L. Melhorn, MD, MMM, CPE

Specialty: Medical Management

Medical school: University of Washington

Master of Medical Management: Tulane University

Board-certified in: Medical Management and Internal Medicine

Primary philosophy of care, community service, or anything you would like to share to prospective and current patients.

I work with Memorial Cornerstone Medicine and the Virginia Mason Memorial to provide excellent clinical services delivered with respect and compassion. I enjoy developing new programs to improve patient access and increase quality of care. As a member of the Memorial Foundation Board of Trustees, I am chairperson of the Cottage in the Meadow capital campaign steering committee. Cottage in the Meadow will be an inpatient hospice facility that will serve patients and their families in Yakima and all of Central Washington for generations to come.

Personal Summary

  • Grew up: Graduated from Cascade High School in Everett, Washington.
  • Hobbies: Being with family, enjoying my son's baseball games, reading, learning, and fly fishing.
  • Practice: Dr. David Williams recruited me in 1977 and I joined Yakima Valley Internists. As we grew we changed our name to Cornerstone Medical Clinic in 1994. Now, as of 2010, we are Memorial Cornerstone Medicine.
Mariela Morales, MD

Mariela Morales, MD

What inspired you to choose medicine as a career?

Both my dad and my grandfather are physicians, so I grew up knowing the role of a doctor and how special a doctor-patient relationship could be. I always loved science but more importantly, I was intrigued by the human body. I liked the idea of interacting with people who put all their trust in me, people who would teach me about their lives and illnesses and in the process, I could try to make their lives healthier and better. This is what I enjoy most to this day.

Do you have a philosophy or approach to working with patients?
I would like to think that I approach my patients as a whole and I look at the big picture. I like to keep things simple and I want to keep the conversation going both ways. One of my biggest beliefs is that patients should be in charge of their health and that I'm a facilitator of the process. I strongly believe in evidence-based medicine and this plays a huge role in the care of my patients.

What do you like about Yakima?
I love the size, the lack of traffic (coming from Houston this is a big change) and the friendliness of the people in this town. I love the landscape and the variety of activities and things nearby that allow you to stay active. I love all of the local fruits and vegetables and that big cities are so close.

Tell me a little known fact about you or talk about what you like to do outside of work.
I am an environmentalist and I care about the world we live in and what we are going to leave to our children, therefore, I do a lot of research on how to live a sustainable life. I enjoy trying food from different countries and I love animals. I'm also very happy when I explore the great outdoors which is very easy to do around here.

Pacific Crest Physicians

Faisal Siddiqui, MD

Medical school: Doctor of medicine, American University of Antigua College of Medicine,
2009-2013

Residency: Central Washington Family Medicine, Yakima 2013-2016


What inspired you to choose medicine?
  I always wanted to have a job that involved being of service to the community.  Being a physician offers me the opportunity to help my patients improve their quality of life and reach their health goals.  Being a part of that process is what I find most valuable

Why did you choose your specialty? I like the ability to see an entire family of all age groups and follow them. It helps me care for them because I understand the dynamics of each family.

What is your philosophy of care? My approach is to be a partner with my patients to help assist them reach their health goals. I use an evidence-based approach for patient care.

What do you like about Yakima? I trained in family medicine at CWFM, so I was a provider in the community for three years previously. I’m happy to be back to serve this community again.  I like Yakima because my family is here.  My wife and I are looking forward to finding new hikes in the region.

What do you like to do outside of work? I enjoy spending time with my wife. I like to watch sports, and we’re learning about places to hike.

Pacific Crest Physicians

Paul Tompkins, MD

Specialty: Pediatrics and Internal Medicine

Medical school: Oral Roberts University, Tulsa, Oklahoma, 1990

Residency: Pitt County Memorial Hospital, Greenville, North Carolina, 1994

Board-certified in: Pediatrics and Internal Medicine

Other medical interests or special services you offer: Peer counseling, cross-cultural communication

Dr. Paul Tompkins grew up in various places across the United States - Florida, Central Illinois and California. From an early age, medicine intrigued him. He tried various fields of work before coming back to medicine.

He graduated from medical school in Oklahoma and completed his residency in North Carolina, specializing in Internal Medicine and Pediatrics. Prior to moving to Yakima, he worked at PacfiCare Clinic in Tamuning, Guam. He has experience in peer counseling and cross-cultural communication.

Dr. Tompkins truly has a passion for what he does and it shows in the care he provides his patients. He sees himself as a partner in helping his patients establish and maintain their best health possible. "Patient choices make a great deal of difference in their health."

Dr. Tompkins and his wife have one child. In his spare time, he enjoys gardening, classical music, drama, literature and snorkeling.