Romsai Tony Boonyasai, M.D., M.P.H.

Headshot of Romsai Tony Boonyasai
  • Medical Director, Johns Hopkins Patient Access Line
  • Associate Professor of Medicine

Languages: English, Thai


High Blood Pressure (Hypertension), Internal Medicine more

Research Interests

Hypertension; Quality improvement for chronic disease; Care coordination at hospital discharge more


The Johns Hopkins Hospital

600 N. Wolfe Street
Nelson/Harvey Building, Suite 215
Baltimore, MD 21287 map

The Johns Hopkins Hospital

1830 East Monument Street
Room 8047
Baltimore, MD 21287 map


Dr. Romsai Tony Boonyasai is an assistant professor of medicine at the Johns Hopkins University School of Medicine. His areas of clinical expertise include hypertension and internal medicine. Dr. Boonyasai serves as medical director of the Johns Hopkins Patient Access Line program.

Dr. Boonyasai is an expert on implementing chronic disease improvement programs. He has particular expertise in building programs for improving hypertension control in low-resource settings and for ensuring safe transitions between hospitals and community-based settings.

He earned his M.D. from the Mount Sinai School of Medicine. He performed his residency at Baylor College of Medicine and a fellowship in internal medicine at Johns Hopkins. He completed an M.P.H. at the Johns Hopkins Bloomberg School of Public Health.

Dr. Boonyasai's research interests include hypertension, quality improvement for chronic disease and care coordination at hospital discharge.

As part of Baltimore CONNECT, a partnership between Johns Hopkins and East Baltimore community organizations, Dr. Boonyasai helps project members and community-based leaders connect with hospital staff and leaders. more


  • Medical Director, Johns Hopkins Patient Access Line
  • Associate Professor of Medicine

Departments / Divisions

Centers & Institutes



  • MD; Icahn School of Medicine at Mount Sinai (1998)


  • Baylor College of Medicine (2002)


  • Internal Medicine; Johns Hopkins Bayview Medical Center (2007)
  • Internal Medicine; Johns Hopkins University School of Medicine (2007)

Research & Publications

Research Summary

Dr. Boonyasai’s research focuses on improving health care quality. He conducts research related to hypertension, quality improvement for chronic disease and care coordination at hospital discharge. 

Selected Publications

View all on PubMed

Abt NB, Sampah ME, Boonyasai RT, Pahwa AK. “Primary colonic adenocarcinoma diagnosed with cutaneous shave biopsy.” BMJ Case Rep. 2015 Jul 6;2015. pii: bcr2015210046. doi: 10.1136/bcr-2015-210046.

Boonyasai RT, Lin YL, Brotman DJ, Kuo YF, Goodwin JS. “Characteristics of primary care providers who adopted the hospitalist model from 2001 to 2009.” J Hosp Med. 2015 Feb;10(2):75-82. doi: 10.1002/jhm.2269.

Hussain T, Allen A, Halbert J, Anderson CA, Boonyasai RT, Cooper LA. “Provider perspectives on essential functions for care management in the collaborative treatment of hypertension: the P.A.R.T.N.E.R. framework.” J Gen Intern Med. 2015 Apr;30(4):454-61. doi: 10.1007/s11606-014-3130-4. Epub 2014 Dec 17.

Cooper LA, Marsteller JA, Noronha GJ, Flynn SJ, Carson KA, Boonyasai RT, Anderson CA, Aboumatar HJ, Roter DL, Dietz KB, Miller ER 3rd, Prokopowicz GP, Dalcin AT, Charleston JB, Simmons M, Huizinga MM. A multi-level system quality improvement intervention to reduce racial disparities in hypertension care and control: study protocol. Implement Sci. 2013 Jun 4;8:60. doi: 10.1186/1748-5908-8-60. PMID: 23734703 


Farnan JM, Burger A, Boonyasai RT, Leykum L, Harrison R, Machulsky J, Parekh V, Sharpe BA, Schleyer AM, Arora VM; SGIM Housestaff Oversight Subcommittee. Survey of overnight academic hospitalist supervision of trainees. J Hosp Med. 2012 Sep;7(7):521-3. doi: 10.1002/jhm.1961. Epub 2012 Aug 7. Erratum in: J Hosp Med. 2013 Mar;8(3):164. Boonayasai, Romsai T [corrected to Boonyasai, Romsai T]. PMID: 22956452 

Brotman DJ, Boonyasai RT, Deutschendorf A. Hospital care and medical utilization after discharge. Ann Intern Med. 2011 Nov 15;155(10):720-1; author reply 722. doi: 10.7326/0003-4819-155-10-201111150-00019. No abstract available. PMID: 22084342 

Boonyasai RT, Steinberg DI, Schleyer AM, Mourad MM, Harte BJ, Sharpe BA. Update in hospital medicine for the general internist 2010-2011. J Gen Intern Med. 2011 Dec;26(12):1492-7. doi: 10.1007/s11606-011-1874-7. Epub 2011 Sep 20. Review. No abstract available. PMID: 21932159 

Leykum LK, Parekh VI, Sharpe B, Boonyasai RT, Centor RM. Tried and true: a survey of successfully promoted academic hospitalists. J Hosp Med. 2011 Sep;6(7):411-5. doi: 10.1002/jhm.894. PMID: 21916004

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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