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Masaru Ishii, M.D., Ph.D.

Photo of Dr. Masaru Ishii, M.D., Ph.D.

Associate Professor of Otolaryngology - Head and Neck Surgery


Expertise: Cerebrospinal Fluid (CSF) Leaks, Cholesterol Granuloma, Chordomas, Chrondrosarcoma, Chronic Sinonasal Infection and Ear Disease, Chronic Sinusitis with Polyps, Clival Tumors, Endocrine Diseases, Endoscopic Frontal Sinus Surgery, Endoscopic Orbital Decompression for Graves' Disease, Endoscopic Repair of Nasal Cerebrospinal Fluid Leaks, Endoscopic Resection of Nasal Tumors, Endoscopic Skull Base Surgery, Endoscopic Tear Duct Surgery, Esthesioneuroblastoma, Head and Neck Surgery, Meningiomas, Nasal Obstruction, Nasal Polyps, Otolaryngology, Paranasal Sinus Tumors, Parasellar Tumors, Pituitary Tumors, Salivary Gland Tumors, Sellar Tumors, Sinus Problems, Sinusitis, Sinusitis and Nasal Polyposis, Skull Base Surgery, Skull Base Tumors, Suprasellar Tumors, Thyroid Cancer, Thyroid Diseases, Thyroid Nodules more

Research Interests: Epithelial cell dysfunction of the upper airways; Molecular mechanisms of host defense in chronic rhinosinusitis; Pathogenesis of anosmia; Gene regulation of cytokine expression more

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Johns Hopkins Bayview Medical Center
Appointment Phone: 443-997-6467

4940 Eastern Avenue
Baltimore, MD 21224 map
Phone: 410-550-0460

Johns Hopkins Medicine - White Marsh
Appointment Phone: 443-997-6467

White Marsh
4924 Campbell Boulevard
Nottingham, MD 21236 map
Phone: 410-550-0460
Fax: 410-614-8610

Johns Hopkins Outpatient Center
Appointment Phone: 443-997-6467

601 N. Caroline St.
Baltimore, MD 21287 map
Fax: 410-614-8610


Dr. Masaru Ishii graduated from University of Pennsylvania Perelman School of Medicine in 1997 and currently serves as an assistant professor of otolaryngology-head and neck surgery at Johns Hopkins. His clinical specialties include surgical management of nasal airway obstruction, chronic sinusitis and sinonasal tumors, as well as endoscopic surgery for skull base tumors.

Dr. Ishii's primary location is Johns Hopkins Bayview Medical Center. more


  • Associate Professor of Otolaryngology - Head and Neck Surgery
  • Associate Professor of Neurosurgery

Departments / Divisions



  • MD PhD, Hospital of the University of Pennsylvania (1997)


  • Hospital of the University of Pennsylvania (2016)

Board Certifications

  • American Board of Otolaryngology / Otolaryngology-General (2003, 2013)
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