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Clark Timothy Johnson, M.D., M.P.H.

Photo of Dr. Clark Timothy Johnson, M.D., M.P.H.
  • Assistant Professor of Gynecology and Obstetrics


High Risk OB, Obstetrics, Prenatal Ultrasound

Research Interests

Optimization of delivery methods for specific patient populations; policy and maternal health implications; obstetric study methodology more

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Johns Hopkins Health Care Center

Appointment Phone: 443-997-0400
1132 Annapolis Road
Suite 100
Odenton, MD 21113 map

Johns Hopkins Medicine - White Marsh

Appointment Phone: 443-997-0400
4924 Campbell Boulevard
Suite 225
Nottingham, MD 21236 map
Phone: 443-997-0400


Clark Johnson, M.D., M.P.H., is an assistant professor in the Johns Hopkins Department of Gynecology and Obstetrics. His care philosophy is to provide evidence-based, patient-centered care to optimize pregnancy outcomes and birth experiences.  

His areas of clinical expertise include the management of high-risk pregnancy, prenatal ultrasonography and obstetric delivery. Dr. Johnson earned his B.S. in honors biochemistry and B.F.A. in theater performance from the University of Michigan. He earned his M.P.H. in general epidemiology from the University of Michigan and his M.D. from Wayne State University in Detroit. Dr. Johnson completed his residency in gynecology and obstetrics at The Johns Hopkins University, as well as his fellowship in maternal-fetal medicine. 

Dr. Johnson’s broad research interests include optimization of delivery methods for specific patient populations, policy and maternal health implications, and obstetric study methodology. He has published numerous manuscripts and book chapters on topics including complementary and alternative medicine in obstetrics, global access to obstetric care, and the content of prenatal care. He is involved in outreach helping to provide hospitals with up-to-date obstetric education and guidelines throughout the state of Maryland.  

Dr. Johnson currently serves as the legislative chair for the Maryland Section of the American College of Obstetricians and Gynecologists and as chair of the Maryland Maternal Mortality Review. He is currently a member of the Society for Maternal-Fetal Medicine, the Society of Family Planning and the American Institute of Ultrasound in Medicine. more


  • Assistant Professor of Gynecology and Obstetrics

Departments / Divisions



  • MD, Wayne State University School Of Medicine (2009)


  • Johns Hopkins University School of Medicine / Obstetrics and Gynecology (2013)


  • Johns Hopkins University School of Medicine / Maternal and Fetal Medicine (2016)

Board Certifications

  • American Board of Obstetrics and Gynecology / Obstetrics And Gynecology (2019)

Research & Publications

Selected Publications

Johnson CT, Choubey V, Satin AJ, et al. Malpractice and Obstetric Practice: the Correlation of Malpractice Premiums to Rates of Vaginal and Cesarean Delivery. American Journal of Obstetrics and Gynecology. 2016 Apr;214(4):545-6.

Tsimis ME, Johnson CT, Raghunathan RS, et al. Risk Factors for Periventricular White Matter Injury in Very Low Birth Weight Neonates. American Journal of Obstetrics and Gynecology. 2016 Mar; 214(3):380.e1-6.

Johnson CT, Burd I, Raghnathan RS, et al. Perinatal inflammation/infection and its association with correction of metabolic acidosis in hypoxic-ischemic encephalopathy. Journal of Perinatology. 2016, Jan 21. E-pub ahead of print

Mock CN, Donkor P, Gawande A, et al. Essential Surgery: Key messages from Disease Control Priorities, 3rd Edition. The Lancet. 2015 May 30;385(9983):2209-19. Epub 2015 Feb 5.

Groen R, Zaharievia M, McCarten J, and Johnson CT. En caul vaginal delivery with vasa previa diagnosed intrapartum. Case Reports in Perinatal Medicine. 2014. May 3(2): 91-93.

Videos & Media

Recent News Articles and Media Coverage

  • What You Need to Know About Getting Tested for Zika, Refinery29 (09/2016)
  • Pregnant Women With Zika Have No Way of Knowing For Sure If Their Baby Will Be Healthy, Quartz (08/2016)
  • What To Expect A Day, Week And Month After Having A C-Section, Women's Health (07/2016)

Patient Ratings & Comments

The Patient Rating score is an average of all responses to physician related questions on the national CG-CAHPS Medical Practice patient experience survey through Press Ganey. Responses are measured on a scale of 1 to 5, with 5 being the best score. Comments are also gathered from our CG-CAHPS Medical Practice Survey through Press Ganey and displayed in their entirety. Patients are de-identified for confidentiality and patient privacy.

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