Ray Parrish, MD

Recognitions

• Fellow Award for Excellence in Clinical Teaching, Massachusetts General Hospital (2022)

Publications

• Bharwani A, Ayasa LA, Avendano CA, Parrish RC, Lara JC, Cedeno JC, Swenson K, Beattie J, Majid A, Parikh MS. Risk Factors of Requiring Tracheostomy in COVID-19 Patients: A Retrospective Analysis of Intubated Patients. J Clin Med. 2026 Feb 8;15(4). PubMed PMID: 41753030
• Beattie J, Nasim H, Chen J, Bharwani A, Lara J, Parrish R, Swenson K, Parikh M, Karlin K, Vanderlaan PA, Majid A. Endobronchial ultrasound-guided sampling: diagnostic yield of needle biopsy and cryobiopsy in addition to needle aspiration. Ann Am Thorac Soc. 2026 Feb 1;23(2):272-279. PubMed PMID: 40996305
• Parrish RC II, Brochard LJ. 50 Studies Every Hospitalist Should Know. 1st ed. Oxford, UK: Oxford University Press. Chapter 20, Non-invasive ventilation for acute exacerbations of COPD. p. 133-139.
• Parrish RC II, Bower RJ. 50 Studies Every Hospitalist Should Know. 1st ed. Oxford, UK: Oxford University Press. Chapter 23, Low tidal volume ventilation in acute respiratory distress syndrome: The ARMA Trial. p. 155-161.
• Beattie J, Ghosn M, Kim K, Parrish RC II, Chen J, Solomon SB, Monette S, Cheleuitte-Nieves C, Bergemann R, Chawla M, Husta BC, Kalchiem-Dekel O, Cohen Y, Preise D, Sacks Z, Scherz A, Yarmus L, Coleman JA, Lee RP. Feasibility and Pathologic Outcomes of Peripheral Lung Vascular Targeted Photodynamic Therapy in a Normal Porcine Lung Model. CHEST Pulmonary. 2025 Mar, 3(1):100098.
• Parrish R, Kheir F. Genomic classifier: biomarker for progression in interstitial lung disease. ERJ Open Res. 2025 May;11(3). PubMed PMID: 40337333
• Beattie J, Parrish R, Ayasa L, Aranguren P, Uribe-Buritica FL, Lopez MN, Pineda CM, Cheng G, Senitko M, Abdelghani R, Magge A, Avendano CA, Kheir F, Swenson K, Parikh M, Wilson J, VanderLaan PA, Gangadharan S, Majid A. Safety and feasibility of bronchoscopic microwave ablation technology for peripheral lung cancer: a multi-center, prospective, single-arm study protocol. BMC Surg. 2025 Oct 24;25(1):497. PubMed PMID: 41137055
• Kim M, Parrish RC 2nd, Tisza MJ, Shah VS, Tran T, Ross M, Cormier J, Baig A, Huang CY, Brenner L, Neuringer I, Whiteson K, Harris JK, Willis AD, Lai PS. Host DNA depletion on frozen human respiratory samples enables successful metagenomic sequencing for microbiome studies. Commun Biol. 2024 Nov 28;7(1):1590. PubMed PMID: 39609616
• Parrish RC 2nd, Swenson KE. A Rising Tide (Unfortunately) Lifts All Boats: Elucidating the Relationship Between Cardiac Filling Pressures and Pleural Effusions. Circ Heart Fail. 2024 Sep;17(9):e012126. PubMed PMID: 39105283
• Menendez ME, Parrish RC 2nd, Ring D, Chen NC. Variation in Physician Charges and Medicare Payments for Hand Surgery. J Hand Microsurg. 2019 Aug;11(2):61-70. PubMed PMID: 31413488
• Parrish RC 2nd, Lokko HN, Yuppa DP, Braun IM, Meyer FL. Psychiatric Complications of Cannabis Oil Use in Cancer Patients: Whose Responsibility Is It To Manage?. J Palliat Med. 2017 May;20(5):448. PubMed PMID: 28263690
• Slowinski SP, Morran LT, Parrish RC 2nd, Cui ER, Bhattacharya A, Lively CM, Phillips PC. Coevolutionary interactions with parasites constrain the spread of self-fertilization into outcrossing host populations. Evolution. 2016 Nov;70(11):2632-2639. PubMed PMID: 27593534
• Menendez ME, Parrish RC 2nd, Ring D. Health Literacy and Time Spent With a Hand Surgeon. J Hand Surg Am. 2016 Apr;41(4):e59-69. PubMed PMID: 26880496
• Parrish RC 2nd, Penley MJ, Morran LT. The Integral Role of Genetic Variation in the Evolution of Outcrossing in the Caenorhabditis elegans-Serratia marcescens Host-Parasite System. PLoS One. 2016;11(4):e0154463. PubMed PMID: 27119159
• Parrish RC 2nd, Menendez ME, Mudgal CS, Jupiter JB, Chen NC, Ring D. Patient Satisfaction and its Relation to Perceived Visit Duration With a Hand Surgeon. J Hand Surg Am. 2016 Feb;41(2):257-62.e1-4. PubMed PMID: 26718069
• Morran LT, Parrish RC 2nd, Gelarden IA, Allen MB, Lively CM. Experimental coevolution: rapid local adaptation by parasites depends on host mating system. Am Nat. 2014 Aug;184 Suppl 1(0 1):S91-100. PubMed PMID: 25061681
• Morran LT, Parrish RC, Gelarden IA, Lively CM. Temporal dynamics of outcrossing and host mortality rates in host-pathogen experimental coevolution. Evolution. 2013 Jul;67(7):1860-8. PubMed PMID: 23815644
• Morran LT, Schmidt OG, Gelarden IA, Parrish RC 2nd, Lively CM. Running with the Red Queen: host-parasite coevolution selects for biparental sex. Science. 2011 Jul 8;333(6039):216-8. PubMed PMID: 21737739
• Parrish RC II, Kheir F. Massachusetts General Hospital Review of Critical Care Medicine. 2nd ed. Philadelphia, PA: Wolters Kluwer. Hemoptysis. In press.

Professional Memberships

• American Association for Bronchology and Interventional Pulmonology, Member
• World Association for Bronchology and Interventional Pulmonology, Member
• American Thoracic Society, Member
• American College of Chest Physicians, Member

Practice Locations

• University of Colorado Hospital

Specialty Information

• Pulmonary Disease, Board Certification (2023)
• Pulmonary Disease and Critical Care Medicine, Board Certification
• Internal Medicine, Board Certification (2021)
• Internal Medicine - Interventional Pulmonary, Specialized Training (0001)

• Lungs and Breathing
• Lungs and Breathing - Interventional Pulmonology
• Lungs and Breathing - Tracheostomy Dependence
• Cancers - Lung Cancer
• Cancers
• Cancers - Thoracic (Tracheal, Esophageal)
• Lungs and Breathing - Lung Disease
• Lungs and Breathing - Pulmonary Disorders
• Lungs and Breathing - Respiratory Disease
• Ear, Nose, and Throat (ENT) - Airway disorders
• Ear, Nose, and Throat (ENT)
• Ear, Nose, and Throat (ENT) - Airway masses
• Ear, Nose, and Throat (ENT) - Airway noises/obstruction
• Ear, Nose, and Throat (ENT) - Tracheal stenosis
• Critical Care
• Lungs and Breathing - Chronic Mechanical Ventilation
• Lungs and Breathing - Granulomatous Lung Disease
• Lungs and Breathing - Interstitial Lung Disease