Sierra Vista PEDIATRICS Clinic

155 Calle Portal Suite 700
Sierra Vista, AZ 85635

 

Clinic Hours

  • Monday – Thursday: 7am – 7pm
  • Friday: 7am – 5pm
  • Saturday: 9am – 3pm 
  • Sunday: 9am -1pm

Laboratory Hours

  • By Appointment Only  
  • Monday – Friday: 8am – 4:45pm
  • Closed for Lunch: 12pm -1pm

520-459-0203

Complete Pediatric Care in Sierra Vista, AZ

Established in 2014, the Sierra Vista Pediatrics Clinic specializes in high-quality, child-focused healthcare. Our dedicated provider team delivers comprehensive care tailored to infants, children, and adolescents—supporting families across the community. Integrated behavioral health and expert dietetics services are available on-site to offer holistic care.

 

Integrated Care for Growing Children

We understand that pediatric health isn’t just about one visit—it’s about nurturing the whole child. That’s why we combine primary medical care with behavioral health counseling and nutrition support, addressing both emotional well-being and physical growth in one location.

 

On-Site Laboratory for Convenience

Our lab is open Monday through Friday by appointment, from 8 AM to 11:45 AM and 1 PM to 3:15 PM, with a lunch break between 12 PM and 1 PM. These streamlined hours help families get needed testing without extra travel.

 

Full Spectrum of Family-Focused Services

Beyond medical exams and vaccinations, we also offer insurance eligibility/enrollment assistance and a range of support services to reduce barriers to care—so families can get everything they need in one friendly, accessible place.

 

Caring for Cochise County’s Children

Located right in Sierra Vista, the Sierra Vista Pediatrics Clinic is dedicated to nurturing healthier futures. Whether you’re managing routine check-ups, growth concerns, or emerging health needs, our team provides compassionate care that honors every child’s potential.

Providers

Christina Howton, FNP-C

Family Nurse Practitioner
Howton color 514x377 1

Family Nurse Practitioner

Christina Howton, FNP-C

JOINED CCHCI IN 2018Why I Believe in the Mission of CCHCI

I'm glad to be a part of an organization that takes care of their community like family.


CHRISTINA'S BACKGROUND

I am originally from Alabama, but first came to Cochise County when stationed on Fort Huachuca with the US Army from 1994 – 1998. I have been here ever since that time.

ACADEMIC BACKGROUND

Professional School

University of Phoenix, Family Nurse Practitioner, 2017
University of Phoenix, Master of Science in Nursing, 2004
University of Alabama, Bachelor of Science in Nursing, 1994

Board Certification
Family Nurse Practitioner

Practice Interests
Pediatrics

Patients Seen
Newborn – 21 years old

Daniel A. Driscoll, MD PhD FAAP

Director of Clinical Evidence Coding and Documentation, Community Pediatrician
Dan Driscoll 514x377 1

Director of Clinical Evidence Coding and Documentation, Community Pediatrician

Daniel A. Driscoll, MD PhD FAAP

JOINED CCHCI IN 2018

Why I Believe in the Mission of CCHCI

Health care delivery to all improves lives, futures, and creates opportunities for whole communities to reach their potential and widen their horizons.


DANIEL'S BACKGROUND

I love being a primary care pediatrician. I am interested in all aspects of child health and have a wide background delivering care from birth through college. My passion is to create relationships with families and their children in order to increase health literacy.


ACADEMIC BACKGROUND

Professional School

PhD. Biochemistry
University of Illinois

Medical Doctor, MD
University of Illinois

Master’s of Science in Paleobiology
University of Bristol – United Kingdom

Bachelor’s of Arts
California State University

Residency
Denver Children’s Hospital
University of Colorado Health Science Center

Board Certification
Pediatrics

Practice Interests
Primary Care Pediatrics

Patients Seen
Infants, children, adolescents

Darlene Melk, MD FAAP CPE

Chief Medical Officer
Darlene Melk Professional Headshot

Chief Medical Officer

Darlene Melk, MD FAAP CPE

Darlene Melk, MD, FAAP, CPE

Chief Medical Officer, Chiricahua Community Health Centers, Inc.
Joined Chiricahua in 2010

Why I Believe in the Mission of Chiricahua

I believe strongly in community medicine. To provide the highest quality and most comprehensive care to our patients, we must work in partnership with one another. At Chiricahua Community Health Centers, providers are supported through care coordination, nursing expertise, and strong administrative infrastructure that allow us to practice medicine the way it should be practiced. This team‑based approach ensures every patient receives the care and respect they deserve.


Professional Background

Darlene Melk, MD, FAAP, CPE, is a pediatrician and physician executive whose path to medicine is deeply shaped by personal experience and commitment to service. Raised by a single mother and as the daughter of a Cuban refugee, Spanish is her first language and remains central to her clinical and leadership work. Diagnosed with Type One diabetes at the age of eight, Dr. Melk developed an early determination to care for children facing medical and social challenges similar to her own.

Her lived experience continues to inform her approach to patient‑centered, community‑based care and her dedication to improving health outcomes for children and families with limited access to services.


Education and Early Career

Dr. Melk earned her Bachelor of Science degree in Biochemistry from Arizona State University in Tempe before completing medical school at the University of Arizona College of Medicine in Tucson. She then completed her pediatric residency at Phoenix Children’s Hospital and Maricopa Medical Center, where she was honored as Senior Resident of the Year.

Following residency, Dr. Melk began her career at a Federally Qualified Health Center in Phoenix. The ability to care for any child regardless of background, insurance status, or circumstance solidified her commitment to practicing medicine in the FQHC environment.


Leadership at Chiricahua

Dr. Melk joined Chiricahua Community Health Centers in 2010 as a Community Pediatrician. Over the next decade, she assumed increasing leadership responsibilities, serving as Director of Community Pediatrics and later Director of Community Medicine. In 2020, she was appointed Chief Medical Officer of Chiricahua, overseeing clinical quality, provider engagement, and integrated care delivery across the organization.

Her leadership focuses on strengthening team‑based care, advancing clinical excellence, and supporting providers in delivering comprehensive services to children and families throughout rural southeastern Arizona.


Regional and Statewide Leadership

Beyond Chiricahua, Dr. Melk has played an active role in regional and statewide health and early childhood initiatives. She served on the First Things First Regional Council from 2016 to 2023 and as Chair of the Council from 2019 to 2023. In 2024, she was appointed by Arizona Governor Katie Hobbs to the Arizona Early Childhood Development and Health Board, the state‑level leadership body for First Things First.

Dr. Melk has also served on the Board of the Western Clinician Network since 2021 and was elected President for a one‑year term in 2023. She previously served on the Steering Committee for the Douglas Education Partnership Council and is currently Chair of the Pediatric Leaders Peer Network Committee for the Arizona Association of Community Health Centers.


Academic and Professional Development

Dr. Melk completed her undergraduate studies at Arizona State University in Tempe, earning a Bachelor of Science degree in Biochemistry. She went on to receive her Doctor of Medicine degree from the University of Arizona in Tucson and completed her pediatric residency training at Phoenix Children’s Hospital and Maricopa Medical Center, where she was recognized for excellence in clinical leadership.

In 2022, Dr. Melk was designated a Certified Physician Executive (CPE) by the American Association of Physician Leaders, recognizing her advanced training and leadership in clinical management and health system performance.

She is currently completing a Master of Applied Science degree in Population Health through Johns Hopkins University, with an expected graduation in 2027. This advanced training supports her work at Chiricahua by strengthening data‑driven decision making, population‑focused care strategies, and long‑term clinical quality improvement initiatives.

Click here for more info about our Pediatric information

 

Deanna Merrill, MSN, APRN, CPNP-PC, CWOCN

Pediatric Nurse Practitioner

Pediatric Nurse Practitioner

Deanna Merrill, MSN, APRN, CPNP-PC, CWOCN

JOINED CCHCI IN 2023

Why I Believe in the Mission of CCHCI

I believe quality healthcare should be accessible to everyone. As a resident of Cochise County, I understand the issues regarding access to healthcare that can occur living in a rural community. My goal is to be a resource in achieving optimal health for the children in Cochise County that I have the privilege of caring for.


DEANNA'S BACKGROUND

I was raised in St. David, where I currently live with my family. I am the mother of seven children and have two grandchildren. I have worked in the healthcare setting my entire adult life, first as a unit clerk, then as a medical transcriptionist, finally becoming a nurse in 2015. My nursing background includes neonatal intensive care, labor and delivery, and earning an additional certification in wound, ostomy and continence nursing with a focus on the pediatric population.

I love going to school and have enjoyed obtaining my education. In my free time, I read, plan, organize and clean. I love spending time with my family and think they are the best.


ACADEMIC BACKGROUND

Professional Schools:

Pima Community College, Associate of Applied Science in Nursing, (2015)

Northern Arizona University, Bachelor of Science in Nursing, (2015)

Emory University, Wound, Ostomy, and Continence Management (2021)

University of Alabama at Birmingham, Master of Science in Nursing, Pediatric Primary Care (2022)

Board Certifications:

Certified Pediatric Nurse Practitioner Primary Care

Certified Wound, Ostomy, and Continence Nurse

Devyn Thurber, MSN, MPH, PNP-BC

Director of Advanced Practice Pediatrics & Ancillary Staff
Devyn Thurber 514x377 1

Director of Advanced Practice Pediatrics & Ancillary Staff

  • 520-364-1429
  • Pediatric Center of Excellence - Douglas, Sierra Vista Pediatrics

Devyn Thurber, MSN, MPH, PNP-BC

JOINED CCHCI IN 2015

Why I Believe in the Mission of CCHCI

I believe in the mission of CCHCI, because it strives to break down social and economic barriers to health for all members of its surrounding community. I am excited to be a part of a growing team that works every day to bring high quality, evidence-based health care to as many children as possible irrespective of their family’s ability to pay.


DEVYN'S BACKGROUND

Growing up, I experienced first-hand the barriers to health that come with living in a rural community. After studying architecture in college, I worked as a patient advocate filing insurance claims for nutritional counseling and advocating on behalf of patients for comprehensive care. My desire to gain a better understanding of how social and economic factors affect the quality of patient care is what led me to pursue my Masters of Public Health (MPH) at Dartmouth College. As an MPH intern for the Women, Infants, and Children Supplemental Nutrition Program (WIC), I witnessed the important role that families play in helping to prevent nutrition-related chronic illnesses that begin in childhood. I attended Yale University to train in pediatric primary care and diabetes management with the professional goal of returning to a rural community where I could work every day to educate families about disease prevention, so that they have the tools to grow healthy families regardless of their circumstance. Outside of my clinical role, I enjoy trail running and spending time exploring Cochise County with my husband, 2 sons and 2 dogs.


ACADEMIC BACKGROUND

Professional School
Yale University School of Nursing
New Haven, Connecticut
Geisel School of Medicine at Dartmouth College
Hanover, New Hampshire

Board Certification / Specialty
Pediatrics, Board Certified

Patients Seen
0 – 21 years old

Heidy H. Anway, RDH, APDH, AAS

Registered Dental Hygienist
ANWAY 514x377 1

Registered Dental Hygienist

Heidy H. Anway, RDH, APDH, AAS

JOINED CCHCI IN 2018

Why I Believe in the Mission of CCHCI

As a resident of beautiful Cochise County, I believe that all of my friends, neighbors, and family deserve access to quality health care. I am privileged to be part of a team that provides such care. As we serve each patient, we will indeed build a healthier community.


HEIDY'S BACKGROUND

I have practiced dental hygiene in southern Arizona for 20 years and have loved every minute! My philosophy is to treat each patient as if they were my own family.

ACADEMIC BACKGROUND

Professional School

Pima Community College, 1994 – 1998
AAS in Dental Hygiene

Board Certification
Local Anesthesua
Nitrous Oxide Certified

Patients Seen
Pediatrics, Adolescents, and Adults

Julie Gamez, RDH AAS

Registered Dental Hygienist
julie gamez 514x377 1

Registered Dental Hygienist

Julie Gamez, RDH AAS

JOINED CCHCI IN 2011

Why I Believe in the Mission of CCHCI

I believe in the mission of CCHCI because it truly is a “clinic with a heart.”  The care is provided with an enthusiasm and aspiration to really make a difference in the health and quality of life for all in our community.


JULIES'S BACKGROUND

As a healthcare provider I have been privileged to have work experience in the private practice setting, as well as public health.  It is my goal to help each individual achieve their optimal dental and overall health.  I have been a CCHCI team member since 2011 and very much enjoy the unique ability to collaborate directly on-site with medical and dental professionals who work together to provide quality, comprehensive healthcare.

ACADEMIC BACKGROUND

Professional School

Pima Community College Dental Hygiene Program
Tucson, Arizona

Board Certification / Specialty
Registered Dental Hygienist

Practice Interests
Preventive dentistry

Patients Seen
9 months and older

Kathleen Vedock, DO, IBCLC

Community Pediatrician
Vedock 514x377 1

Community Pediatrician

Kathleen Vedock, DO, IBCLC

JOINED CCHCI IN 2017

Why I Believe in the Mission of CCHCI

My goal is to get to know children and their care-takers, partnering with the entire family, working together to provide individualized, comprehensive care. Chiricahua allows me to practice this kind of medicine.


KATHLEEN'S BACKGROUND

My fond recollection of the physician who cared for me from birth to 21yrs inspired me throughout my life to become a pediatrician. Beyond my seventeen years of clinical experience caring for children, motherhood has complimented and enriched my practice as a pediatrician beyond my expectations. The experiences I share with my husband as we raise our young sons and daughter, are both exciting and enlightening, and my passion for a child’s well-being continues to grow. My own breastfeeding challenges lead to my interest in breastfeeding medicine. As a International Board Certified Lactation Consultant (IBCLC), I hope to help guide mothers in their own breastfeeding journey.

Outside of medicine I share with my family a love of the great outdoors and strive to live a healthful, meaningful life. As an Army spouse, we’ve enjoyed experiences serving the nation while exploring the country. Our interests in the Southwest brought us back to southern Arizona.


Professional School

Philadelphia College of Osteopathic Medicine, Philadelphia,PA (1994-1998)

Residency Training 

(pediatric residency) Geisinger Medical Center, Danville,PA (1999-2003): (internship) Geisinger Medical Center 1998-1999, Danville,Pa

Practice Interest

Breastfeeding Medicine

Patients Seen

Birth to Young Adult
Breastfeeding dyads

Polly Lund, LCSW

Licensed Clinical Social Worker
Polly Lund LCSW

Licensed Clinical Social Worker

  • Sierra Vista Pediatrics

Polly Lund, LCSW

Polly Lund, LCSW

Licensed Clinical Social Worker | Integrated Behavioral Health | Chiricahua Health Centers

Polly Lund is a Licensed Clinical Social Worker providing integrated behavioral health services at Chiricahua Health Centers. She works alongside medical providers to support patients’ mental and emotional well-being as part of whole-person care.

Polly is committed to helping patients navigate life’s challenges with practical support, compassion, and care that is fully connected to their overall health.

Approach to Care

As part of Chiricahua’s integrated behavioral health team, Polly collaborates with primary care providers to address both physical and mental health needs. She focuses on meeting patients where they are, offering support that is accessible, respectful, and tailored to each individual.

Areas of Focus

  • Integrated behavioral health
  • Mental health support
  • Brief interventions within primary care
  • Whole-person, patient-centered care

Steven Dahlke, MD FAAP

Community Pediatrician
Dahlke 514x377 1

Community Pediatrician

Steven Dahlke, MD FAAP

JOINED CCHCI IN 2015

Why I Believe in the Mission of CCHCI

I believe in the CCHCI mission because I have been impressed by the excellent care that everyone receives. Everyone is treated fairly and with compassion. These are things that I always strive to do.


Steven's BACKGROUND

Since 1995 I have practiced pediatric medicine in Hawaii, Boise and Meridian Idaho, and now in Sierra Vista Arizona. I have enjoyed living in all these places. I have experience in most areas of general pediatric medicine. I enjoy being in an outpatient pediatric practice and the variety of challenges that it brings. I am especially passionate about immunizations and think that they are one of the most important things we can do to fight disease. I also enjoy helping new parents take care of and raise healthy babies and children. I look forward to helping take care of the pediatric population in Cochise County for many years to come.

ACADEMIC BACKGROUND

Professional School

Loma Linda University School of Medicine

Loma Linda, California

Residency Training 
University of Hawaii Pediatric Residency Program
Honolulu, Hawaii

Board Certification / Specialty
Pediatrics, Board Certified

Practice Interests 
Adolescent Health

Patients Seen
0 – 21 years old