Meet our team

Staff • Dermatology Associates of Oak Ridge, P.C.

All our professionals at Dermatology Associates of Oak Ridge, PC maintain the highest levels of accreditation and pursue ongoing education to stay abreast of the latest trends in dermatology.

Leland Smith, M.D., FAAD

Medical School:

University of Tennessee College of Medicine, Memphis; 2005

Internship:

University of Tennessee Health Science Center, 2006

Dermatology Residency:

University of Tennessee Health Science Center, 2009

Board Certification:

Board Certified by the American Board of Dermatology, 2009

Professional Organizations:

  • Fellow of the American Board of Dermatology
  • American Medical Association
  • Roane-Anderson County Medical Society
  • Tennessee Dermatological Society
  • East Tennessee Dermatological Society
  • Tennessee Medical Association 

Katherine Kerchner, M.D., FAAD

Medical School:

University of Missouri-Columbia; 2005

Internship:

University of Tennessee Medical Center, Knoxville; 2006

Dermatology Residency:

Wake Forest University, Winston-Salem, NC; 2009

Mohs Micrographic Surgery Fellowship:

Wake Forest University, Winston-Salem, NC; 2010

Board Certification:

  • Board Certified by the American Board of Dermatology, 2009
  • Diplomate of the American Board of Dermatology
  • Founding Member of the American Board of Medical Specialties with a certification in Micrographic Dermatological Surgery

Professional Organizations:

  • Fellow of the American Academy of Dermatology
  • Fellow of the American College of Mohs Surgery
  • Roane-Anderson County Medical Society
  • Tennessee Dermatological Society
  • East Tennessee Dermatological Society
  • Tennessee Medical Association
  • Women's Dermatologic Society
  • Diplomate of the American Board of Dermatology

Evgeniya T. Mohammed, M.D., FAAD

Medical School:

East Tennessee State University Quillen College of Medicine Johnson City, 2017

Internship:

University of Tennessee Health Science Center Memphis, 2018

Dermatology Residency:

University of Tennessee Health Science Center Memphis, 2021

Board Certification:

Board Certified by the American Board of Dermatology, 2021

Professional Organizations:

  • Fellow of the American Academy of Dermatology
  • American Board of Dermatology
  • American Medical Association
  • Tennessee Medical Association
  • Tennessee Dermatological Society
  • American Academy of Cosmetic Surgery
  • American Society for Dermatologic Surgery

Andrew Morgan, PA-C, MPAS

Master of Physician Assistant Studies:

University of Nebraska College of Medicine, Omaha, NE
Dermatology Specialization, Internship at Mayo Dept. of Dermatology
Honor Graduate, 1999

Military Physician Assistant Program:

University of Texas Health Science Center, San Antonio, TX
Bachelor of Science in Physician Assistant Studies
Internship at Fort Riley Kansas
Honor Graduate 1998

Undergraduate:

Athens State College, Athens, AL; BS in Education; Honor Graduate, 1993

Professional Certifications:

  • NCCPA National Board Certification, Physician Assistant, 1998; recertified 2003, 2009
  • NCCPA National Board Certification in Surgery, 1998

Professional Associations:

  • American Academy of Physician Assistants
  • Society of Dermatology Physician Assistants
  • Society of Army Physician Assistants
  • Tennessee Academy of Physician Assistants
  • National Psoriasis Foundation

Additional:

  • Associate Professor, Lincoln Memorial University-Debusk College of Osteopathic Medicine, PA studies
  • Clinical Instructor, University of Tennessee Health Science Center, College of Medicine, PA studies
  • Served 22 years USAR (United States Army Reserve), retired 2010 after multiple deployments

Jerry Allen, BSN, MSN, APN-C

Master of Science in Nursing:

Master of Science in Nursing, RN, BSN, MSN, ANP-C
University of Tennessee, Knoxville, TN, 2007
Invitation to Sigma Theta Tau, International Honor Society for Nurses

Undergraduate:

Bachelor of Science in Nursing
University of Tennessee, Knoxville, TN, 2006
East Tennessee State University, Johnson City, TN

Professional Certifications:

  • Certified Advanced Practice Nurse, 2008
  • American Nurses Credentialing Center National Exam, Family Nurse Practitioner, 2008
  • Basic Life Support Certification, 1988 - Present
  • Advanced Cardiac Life Support, 2002 - Present

Professional Associations:

  • American Academy of Nurse Practitioners
  • American Nurses Association
  • Tennessee Nurses Association
  • American Diabetes Association

Derek Landon Ramsey, PA-C, MMS

Master of Medical Science:

Lincoln Memorial University- Debusk College of Medicine, Harrogate, TN
Pi Alpha Honors, 2017

Undergraduate:

Bachelor of Science in Biology: Marshall University, Huntington, WV
Magna Cum Laude, 2014

Professional Certifications:

  • NCCPA National Board Certification, Physician Assistant, 2017
  • SDPA Diplomate Fellow, 2020

Professional Associations:

  • American Academy of Physician Assistants
  • Society of Dermatology Physician Assistants
  • Tennessee Academy of Physician Assistants

Additional:

  • Trained at Dermatology Associates of Oak Ridge in 2017 as a student.
  • Practiced Medical Dermatology in Charleston, WV from 2017-2020.

Lauren Church, PA-C

Master of Physician Assistant:

Eastern Virginia Medical School, Norfolk, VA, 2018

Undergraduate:

University of Tennessee, Knoxville, TN; B.S.E. Kinesiology, 2012

Professional Certifications:

  • NCCPA National Board Certification, Physician Assistant, 2018 to present
  • American Heart Association, ACLS, 2016 to present
  • AHA BLS Certification, 2018 to present

Professional Associations:

  • American Academy of Physician Assistants
  • Society of Dermatology Physician Assistants

Kegan Reilly, PA-C, MPAS

Master of Physician Assistant:

University of Nebraska Medical Center, Ft. Sam Houston, TX

Interservice Physician Assistant Program (IPAP)

Pi Alpha Honor Graduate (GPA 3.9) 2014

Undergraduate:

United States Military Academy, West Point, NY BS in Math Sciences

Honor Graduate, 2008

Professional Certifications:

  • NCCPA National Board Certification, Physician Assistant, 2014
  • SDPA Diplomate Fellow, 2022

Professional Associations:

  • Society of Dermatology Physician Assistants
  • Pi Alpha National Honor Society IPAP Chapter

Additional:

  • Served as Battalion Aeromedical Physician Assistant for the 1-501st Apache Attack Battalion, 1st Armored Division Combat Aviation Brigade, Feb. 2016 - Mar. 2019
  • Flight Surgeon Course Graduate, U.S. Army Aviation Center and School, Ft. Rucker, AL, 2016
  • Served as Battalion Physician Assistant - Primary Care for the 1-77th Armored Battalion, Nov. 2014 - Feb. 2016
  • Served 10 years in the United States Army, including 2 deployments.

Jerrin Levy, PA-C

Master of Health Science in Physician Assistant Studies:

South College, Knoxville, TN, 2015

Undergraduate:

University of Kentucky, Lexington, KY; BS in Human Nutrition, 2012

Professional Certifications:

  • NCCPA National Board Certification, Physician Assistant, 2015 to present
  • AHA BLS Certification, 2013 to present

Professional Associations:

  • American Academy of Physician Assistants
  • Society of Dermatology Physician Assistants

Additional:

  • Practiced medical and cosmetic dermatology in Greeneville, TN from December 2015 to February 2024

Linda Clark

Laser Specialist, Electrologist

Linda Clark is a licensed and experienced laser specialist and state licensed electrologist. She has been trained and is supervised by board-certified dermatologists on site. Linda specializes in laser hair removal, Fotofacial treatments, as well as chemical peels. She offers a variety of procedures to reduce brown spots, red spots, acne, and rosacea, as well as smooth skin texture. Linda has expertise with both the Aurora RF Fotofacial and the Polaris skin tightening systems. These systems offer a combination of energies for the most effective and comfortable solution with no downtime. Linda uses the GentleLASE 755 nm Alexandrite laser for removal of unwanted hair, microvaricosities, and red and brown spots. Special packages are available. Call today for a consult!

Chelsea McCroskey, MSN, FNP-BC

Master of Science in Nursing:

Master of Science in Nursing, MSN, FNP-BC
Lincoln Memorial University, Harrogate, TN, 2023

Undergraduate:

Bachelor of Science in Nursing
University of Tennessee, Knoxville, TN, 2017

Professional Certifications:

  • Family Nurse Practitioner, 2023
  • American Nurses Credentialing Center National Exam, Family Nurse Practitioner, 2023
  • Basic Life Support Certification
  • Neuromodulators & Dermal Fillers – Med-Aesthetics Training Institution

Additional:

  • Chelsea is a board-certified Family Nurse Practitioner focusing on aesthetic medicine. She works closely with our patients to develop a personalized approach to reach their cosmetic goals. Achieving an enhanced, natural result is Chelsea's specialty. She loves helping patients feel like the most confident version of themselves.
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