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Red Bluff Family Medicine Doctors

Dr. Heshani Abeysundara MD

Heshani Abeysundara, MD

Joined Lassen Medical Clinic:

  • 2018

License And Certifications:

  • Florida Medical Training License Florida Board of Medicine Basic Life Support Advanced Cardiovascular Life Support – June 2015 – present
  • In process – 2017 2017


  • Doctor of Medicine – May 2011 – Dec 2014
  • American University of the Caribbean School of Medicine (AUC), St. Maarten – Sep 2006 – Jun 2010


  • Fung AW, Ebhardt HA, Abeysundara H, Moore J, Xu Z, Fahlman RP. An Alternative mechanism for the catalysis of peptide bond formation by L/F transferase: substrate binding and orientation. Journal of Molecular Biology 2011; 409(4):617-29


Dr. Larry Fish DO

Larry W. Fish, DO

Joined Lassen Medical Clinic:

  • 1993

Board Certified:

  • 1985


  • Doctor of Osteopathy, University of Osteopathic Medicine and Health Services, Des Moines, Iowa, 1983
  • Doctor of Medicine, St. George’s University School of Medicine, Grenada, West Indies, 1979
  • Bachelor of Arts, Biology/Chemistry/Pre-Medical Science, Pella, Iowa, 1978


  • Chicago Osteopathic Medical Center, Chicago, Illinois, 1984-1985
  • Organizations:
  • American Osteopathic Association
  • Osteopathic Physicians and Surgeons of California
  • American College of Osteopathic Family Physicians

View Dr. Fish's profile page.

Dr. Katherine Herring MD


Katherine Herring, MD

Joined Lassen Medical Clinic:

  • January 2018


  • Bachelor of Science, Biology with minor in Chemistry, University of Houston, 1990
  • M.D. Medicine, Texas Tech University Health Sciences Center
  • M.D. Family Medicine Residency Program, The University of Texas Medical Branch at Galveston

Current Associations/Affiliations:

  • American Board of Family Medicine
  • Texas Academy of Family Physician
  • Texas Medical Association

Current And Recent Leadership Roles:

  • OPCO (Operations Company) board member at local hospital
  • UMQM (Utilization Management Quality Management) for major insurance plan
  • Key note physician overseeing four local primary care physicians for major insurance plan
  • Member of IMP (Inpatient Manager) community to manage and reduce admissions
  • Board Member for major advantage plan 

Dr. Dan McDaniel MD


Dan E. McDaniel, MD

Joined Lassen Medical Clinic:

  • 1971

Board Certified:

  • 1965


  • University of California, San Francisco, School of Medicine, San Francisco, California


  • Community Hospital of Sonoma County, Santa Rosa, California

Military Service:

  • US Navy

View Dr. McDaniel's profile page.


Learn More

For more information or to make an appointment with one of Family Medicine doctors, please call 530.527.0414 or contact us.