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License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

Patient Reviews

Patient comments (5)

The overall average patient rating of Dr. Brian Koos is Average. Dr. Koos has been reviewed by 12 patients who have provided 5 comments. The rating is 3 out of 5 stars.

Patient Ratings
Ease of Appointment 3.0
Promptness 2.5
Courteous Staff 2.3
Accurate Diagnosis 2.2
Bedside Manner 1.8
Spends Time with Me 2.0
Follows Up After Visit 2.0

Specialties & Research

Dr. Brian Koos, MD is board certified in Maternal & Fetal Medicine.

  • He has special expertise in 10 areas:
  • Amniocentesis (Amniotic Fluid Test--AFT)
  • Clinical Research
  • Fetal Diseases
  • Fetal Version
  • Genetics
  • Heart Diseases
  • High Risk Pregnancy
  • Obstetrics
  • Pregnancy Complications
  • Pregnancy Complications

Education & Awards

Dr. Koos graduated from Loma Linda University. He has 1 awards.

Castle Connolly America's Top Doctors® (2002 - 2008, 2010 - 2015)


Dr. Koos has 5 hospital affiliations:

  • UCLA Medical Center 
  • Bakersfield Memorial Hospital 


  • Spanish

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Additional Information
Dr. Brian John Koos MD is a male Obstetrician & Gynecologist, has 37 years of experience and practices in Maternal & Fetal Medicine.
Where does Dr. Brian J. Koos practice?
Dr. Brian Koos has 3 office locations.
Dr. Brian Koos practices Maternal & Fetal Medicine near Los Angeles, CA.
Additional practice locations include: Bakersfield, CA.
See Los Angeles Obstetricians & Gynecologists.