Ryan Kammeyer, MD

Professional Titles

• Assistant Professor of Pediatrics and Neurology

Research Interests

Pediatric neuroimmunology

Publications

• Kammeyer R, Coughlan C. The Roles and Uses of Extracellular Vesicles in Neuroimmunologic Diseases. J Neurosci. 2026 Oct 21;46(42). PubMed PMID: 42907178
• Theisen A, Ogbu EA, Beil EF, Harry O, Appenzeller S, Kammeyer R, Van der Heijden H, Knight AM, Craven HJ, Rodriguez M. Neuropsychiatric Systemic Lupus Erythematosus in Children: A Scoping Review. Open Access Rheumatol. 2026;18:610116. PubMed PMID: 42818874
• Borko TL, Ritchie A, Selva S, Sillau S, Engebretson E, Wolf AB, Alvarez E, Gross R, Gutierrez E, Corboy J, Silva D, Kammeyer R, Piquet AL, Vollmer TL, Chahin S, Owens G, Bennett JL, Nair KV. Establishing demographic-based normative values for neurofilament light chain and glial fibrillary acidic protein in serum and plasma samples. Mult Scler J Exp Transl Clin. 2026 Jul-Sep;12(3):20552173261466440. PubMed PMID: 42488366
• Santoro JD, Kazerooni L, Lucas MC, Yousuf MM, Otey ST, Bouchard S, Frost KC, Nguyen L, Anadani NA, Mahmud A, Manning MA, Rachubinski AL, Kammeyer RM, Patel L, Koster LEA, van Eeghen AM, Spinazzi NA, Franklin C, Quinn EA, Espinosa JM, Rafii MS. Immunosuppression in down syndrome regression disorder: a prospective observational cohort study. Brain Commun. 2026;8(3):fcag203. PubMed PMID: 42293324
• Santoro JD, Silverman M, Lucas MC, Yousuf MM, Otey ST, Gray SV, Jordan B, Kahan MD, Agurs LD, Das MVH, Holder D, King D, Quinn EA, Kammeyer R, Rafii MS. Electroencephalographic Normalization as a Biomarker of Clinical Recovery in Down Syndrome Regression Disorder. Ann Clin Transl Neurol. 2026 Jun 7. [Epub ahead of print] PubMed PMID: 42252710
• Kammeyer R, Sillau S, Chapman K, Lindwall JJ, Cechovic K, Morrow K, Hutaff-Lee C, Schreiner T. Desired clinic characteristics and unmet support needs for adults with multiple sclerosis: A cross-sectional survey. Mult Scler J Exp Transl Clin. 2026 Apr-Jun;12(2):20552173261456058. PubMed PMID: 42226809
• Kammeyer R, Rodriguez M, Knight A, Cooper JC, Sadun R, Matlock D, Bennett JL, Fuhlbrigge R, Hutaff-Lee C, Ogbu EA. Cognitive Screening and Neuropsychological Evaluation in Children and Young Adults With Childhood-Onset Systemic Lupus Erythematosus: A Survey of Rheumatologists. ACR Open Rheumatol. 2026 Mar;8(3):e90009. PubMed PMID: 41804533
• Rommer PS, Jiang W, Nolte JP, Mikami T, De Seze J, Sánchez P, Harel A, Alkabie S, Kaneko K, Bilodeau PA, Misu T, Kremer L, Bigaut K, Leypoldt F, Aktas O, Ringelstein M, Siffrin V, Zhang LJ, Cong H, Lowe M, Barreras P, Chen H, Piquet AL, Sotirchos ES, Kammeyer R, Zook J, Bennett JL, Berger T, Fujihara K, Levy M, Shi FD, Paul F. Complement Inhibition for Acute Neuromyelitis Optica Spectrum Disorder Attacks: Insights From an International Case Series. Neurol Neuroimmunol Neuroinflamm. 2026 Mar;13(2):e200548. PubMed PMID: 41671531
• Borko TL, Winters P, Money KM, Sillau S, Eggmann S, Selva S, Ritchie A, Kammeyer R, Owens GP, Bennett JL, Piquet AL. Long-term outcomes in leucine-rich glioma inactivated-1 autoimmune encephalitis and associated biomarkers of inflammation and neuronal and glial injury. Front Neurol. 2025;16:1583892. PubMed PMID: 40470500
• Kammeyer R, Sillau S, Chapman K, Lindwall JJ, Hutaff-Lee C, Schreiner T. Self-reported quality of life related to cognitive function and fatigue in adults with multiple sclerosis. Mult Scler Relat Disord. 2025 Dec;104:106809. PubMed PMID: 41138398
• Morgan LE, Eschbach K, Gilani A, Kammeyer R. Child Neurology: A Case of Rasmussen Syndrome Without Seizures. Neurology. 2025 Jul;105(1):e213800. PubMed PMID: 40472308
• Morgan LE, Eschbach K, Gilani A, Kammeyer R. Child Neurology: A Case of Rasmussen Syndrome Without Seizures. Neurology. 2025 Jul;105(1):e213800. PubMed PMID: 40472308
• Borko TL, Winters P, Money KM, Sillau S, Eggmann S, Selva S, Ritchie A, Kammeyer R, Owens GP, Bennett JL, Piquet AL. Long-term outcomes in leucine-rich glioma inactivated-1 autoimmune encephalitis and associated biomarkers of inflammation and neuronal and glial injury. Front Neurol. 2025;16:1583892. PubMed PMID: 40470500
• Nguyen-Martinez A, Weigand B, Wolfe K, Kammeyer R, Schreiner T, Hutaff-Lee C. Clinical utility of brief screening measures during neuropsychological consultation for pediatric onset multiple sclerosis. J Int Neuropsychol Soc. 2024 Sep 19;:1-8. [Epub ahead of print] PubMed PMID: 39297185
• Rachubinski AL, Patel LR, Sannar EM, Kammeyer RM, Sanders J, Enriquez-Estrada BA, Worek KR, Fidler DJ, Santoro JD, Espinosa JM. JAK inhibition in Down Syndrome Regression Disorder. J Neuroimmunol. 2024 Oct 15;395:578442. PubMed PMID: 39216159
• Kammeyer R, Chapman K, Furniss A, Hsieh E, Fuhlbrigge R, Ogbu EA, Boackle S, Zell J, Nair KV, Borko TL, Cooper JC, Bennett JL, Piquet AL. Blood-based biomarkers of neuronal and glial injury in active major neuropsychiatric systemic lupus erythematosus. Lupus. 2024 Sep;33(10):1116-1129. PubMed PMID: 39148457
• Gombolay G, Brenton JN, Yang JH, Stredny CM, Kammeyer R, Fisher KS, Sandweiss AJ, Erickson TA, Kannan V, Otten C, Steriade C, Vu N, Santoro JD, Robles-Lopez K, Goodrich R, Otallah S, Arellano J, Christiana A, Morris M, Gorman MP, Kornbluh AB, Kahn I, Sepeta L, Jiang Y, Muscal E, Murray KO, Moodley M, Hardy D. Isolated Psychiatric Symptoms in Children With Anti-N-Methyl-d Aspartate Receptor Encephalitis. Pediatr Neurol. 2024 Oct;159:12-15. PubMed PMID: 39094249
• Santoro JD, Khoshnood MM, Jafarpour S, Nguyen L, Boyd NK, Vogel BN, Kammeyer R, Patel L, Manning MA, Rachubinski AL, Filipink RA, Baumer NT, Santoro SL, Franklin C, Tamrazi B, Yeom KW, Worley G, Espinosa JM, Rafii MS. Neuroimaging abnormalities associated with immunotherapy responsiveness in Down syndrome regression disorder. Ann Clin Transl Neurol. 2024 Apr;11(4):1034-1045. PubMed PMID: 38375538
• Kammeyer R, Ogbu EA, Cooper JC, Stolz E, Piquet AL, Fuhlbrigge RC, Bennett JL, Hutaff-Lee C. [Formula: see text] Cognitive dysfunction in pediatric systemic lupus erythematosus: current knowledge and future directions. Child Neuropsychol. 2024 Jul;30(5):818-846. PubMed PMID: 37902575
• Borko TL, Baxter R, Cabrera-Martinez B, Thiruppathi E, Sabalza M, Venkataraman I, Selva S, Rester C, Sillau S, Pastula DM, Bennett JL, Alvarez E, Gross R, Shah A, Kammeyer R, Corboy JR, Kedl RM, Hsieh EWY, Piquet AL. SARS-CoV-2 mRNA vaccination induces an antigen-specific T cell response correlating with plasma interferon-gamma in B cell depleted patients. J Neuroimmunol. 2023 Oct 15;383:578192. PubMed PMID: 37666038
• Santoro JD, Spinazzi NA, Filipink RA, Hayati-Rezvan P, Kammeyer R, Patel L, Sannar EA, Dwyer L, Banerjee AK, Khoshnood M, Jafarpour S, Boyd NK, Partridge R, Gombolay GY, Christy AL, Real de Asua D, Del Carmen Ortega M, Manning MA, Van Mater H, Worley G, Franklin C, Stanley MA, Brown R, Capone GT, Quinn EA, Rafii MS. Immunotherapy responsiveness and risk of relapse in Down syndrome regression disorder. Transl Psychiatry. 2023 Aug 8;13(1):276. PubMed PMID: 37553347
• Tisavipat N, Chang BK, Ali F, Pittock SJ, Kammeyer R, Declusin A, Cohn SJ, Flanagan EP. Subacute Horizontal Diplopia, Jaw Dystonia, and Laryngospasm. Neurol Neuroimmunol Neuroinflamm. 2023 Jul;10(4). PubMed PMID: 37311643
• Gombolay G, Brenton JN, Yang JH, Stredny CM, Kammeyer R, Otten CE, Vu N, Santoro JD, Robles-Lopez K, Christiana A, Steriade C, Morris M, Gorman M, Moodley M, Hardy D, Kornbluh AB, Kahn I, Sepeta LN, Yeshokumar A. MRI Features and Their Association With Outcomes in Children With Anti-NMDA Receptor Encephalitis. Neurol Neuroimmunol Neuroinflamm. 2023 Jul;10(4). PubMed PMID: 37236807
• Brock DC, Abbott M, Reed L, Kammeyer R, Gibbons M, Angione K, Bernard TJ, Gaskell A, Demarest S. Epilepsy panels in clinical practice: Yield, variants of uncertain significance, and treatment implications. Epilepsy Res. 2023 Jul;193:107167. PubMed PMID: 37230012
• Borko TL, Baxter R, Cabrera-Martinez B, Thiruppathi E, Sabalza M, Venkataraman I, Selva S, Rester C, Sillau S, Pastula DM, Bennett JL, Alvarez E, Gross R, Shah A, Kammeyer R, Corboy JR, Kedl RM, Hsieh EWY, Piquet AL. SARS-CoV-2 mRNA vaccination induces an antigen-specific T cell response correlating with plasma interferon-gamma in B cell depleted patients. J Neuroimmunol. 2023 Oct 15;383:578192. PubMed PMID: 37666038
• Santoro JD, Spinazzi NA, Filipink RA, Hayati-Rezvan P, Kammeyer R, Patel L, Sannar EA, Dwyer L, Banerjee AK, Khoshnood M, Jafarpour S, Boyd NK, Partridge R, Gombolay GY, Christy AL, Real de Asua D, Del Carmen Ortega M, Manning MA, Van Mater H, Worley G, Franklin C, Stanley MA, Brown R, Capone GT, Quinn EA, Rafii MS. Immunotherapy responsiveness and risk of relapse in Down syndrome regression disorder. Transl Psychiatry. 2023 Aug 8;13(1):276. PubMed PMID: 37553347
• Tisavipat N, Chang BK, Ali F, Pittock SJ, Kammeyer R, Declusin A, Cohn SJ, Flanagan EP. Subacute Horizontal Diplopia, Jaw Dystonia, and Laryngospasm. Neurol Neuroimmunol Neuroinflamm. 2023 Jul;10(4). PubMed PMID: 37311643
• Gombolay G, Brenton JN, Yang JH, Stredny CM, Kammeyer R, Otten CE, Vu N, Santoro JD, Robles-Lopez K, Christiana A, Steriade C, Morris M, Gorman M, Moodley M, Hardy D, Kornbluh AB, Kahn I, Sepeta LN, Yeshokumar A. MRI Features and Their Association With Outcomes in Children With Anti-NMDA Receptor Encephalitis. Neurol Neuroimmunol Neuroinflamm. 2023 Jul;10(4). PubMed PMID: 37236807
• Brock DC, Abbott M, Reed L, Kammeyer R, Gibbons M, Angione K, Bernard TJ, Gaskell A, Demarest S. Epilepsy panels in clinical practice: Yield, variants of uncertain significance, and treatment implications. Epilepsy Res. 2023 Jul;193:107167. PubMed PMID: 37230012
• Moore C, Pollard R, Press CA, Hiller M, Maloney J, Barry M, Kammeyer R. A 14-year-old Girl with Right-Sided Weakness and Speech Difficulty. Neurohospitalist. 2022 Apr;12(2):408-412. PubMed PMID: 35419134
• Shah AA, Wolf AB, Declusin A, Coleman K, Kammeyer R, Khan B, Corboy JR. Challenging Cases in Neuroimmunology. Semin Neurol. 2022 Dec;42(6):695-707. PubMed PMID: 36690027
• Passeri M, Matthews E, Kammeyer R, Piquet AL. Update in autoimmune and paraneoplastic myelopathies: Newly described antigen targets and antibody testing. Front Neurol. 2022;13:972143. PubMed PMID: 35968301
• McKnight D, Morales A, Hatchell KE, Bristow SL, Bonkowsky JL, Perry MS, Berg AT, Borlot F, Esplin ED, Moretz C, Angione K, Ríos-Pohl L, Nussbaum RL, Aradhya S, Haldeman-Englert CR, Levy RJ, Parachuri VG, Lay-Son G, de Montellano DJD, Ramirez-Garcia MA, Benítez Alonso EO, Ziobro J, Chirita-Emandi A, Felix TM, Kulasa-Luke D, Megarbane A, Karkare S, Chagnon SL, Humberson JB, Assaf MJ, Silva S, Zarroli K, Boyarchuk O, Nelson GR, Palmquist R, Hammond KC, Hwang ST, Boutlier SB, Nolan M, Batley KY, Chavda D, Reyes-Silva CA, Miroshnikov O, Zuccarelli B, Amlie-Wolf L, Wheless JW, Seinfeld S, Kanhangad M, Freeman JL, Monroy-Santoyo S, Rodriguez-Vazquez N, Ryan MM, Machie M, Guerra P, Hassan MJ, Candee MS, Bupp CP, Park KL, Muller E 2nd, Lupo P, Pedersen RC, Arain AM, Murphy A, Schatz K, Mu W, Kalika PM, Plaza L, Kellogg MA, Lora EG, Carson RP, Svystilnyk V, Venegas V, Luke RR, Jiang H, Stetsenko T, Dueñas-Roque MM, Trasmonte J, Burke RJ, Hurst ACE, Smith DM, Massingham LJ, Pisani L, Costin CE, Ostrander B, Filloux FM, Ananth AL, Mohamed IS, Nechai A, Dao JM, Fahey MC, Aliu E, Falchek S, Press CA, Treat L, Eschbach K, Starks A, Kammeyer R, Bear JJ, Jacobson M, Chernuha V, Meibos B, Wong K, Sweney MT, Espinoza AC, Van Orman CB, Weinstock A, Kumar A, Soler-Alfonso C, Nolan DA, Raza M, Rojas Carrion MD, Chari G, Marsh ED, Shiloh-Malawsky Y, Parikh S, Gonzalez-Giraldo E, Fulton S, Sogawa Y, Burns K, Malets M, Montiel Blanco JD, Habela CW, Wilson CA, Guzmán GG, Pavliuk M. Genetic Testing to Inform Epilepsy Treatment Management From an International Study of Clinical Practice. JAMA Neurol. 2022 Dec 1;79(12):1267-1276. PubMed PMID: 36315135
• Santoro JD, Patel L, Kammeyer R, Filipink RA, Gombolay GY, Cardinale KM, Real de Asua D, Zaman S, Santoro SL, Marzouk SM, Khoshnood M, Vogel BN, Tanna R, Pagarkar D, Dhanani S, Ortega MDC, Partridge R, Stanley MA, Sanders JS, Christy A, Sannar EM, Brown R, McCormick AA, Van Mater H, Franklin C, Worley G, Quinn EA, Capone GT, Chicoine B, Skotko BG, Rafii MS. Assessment and Diagnosis of Down Syndrome Regression Disorder: International Expert Consensus. Front Neurol. 2022;13:940175. PubMed PMID: 35911905
• Pointon T, Ward R, Yeshokumar A, Piquet A, Schreiner T, Kammeyer R. Evaluation of multiple consensus criteria for autoimmune encephalitis and temporal analysis of symptoms in a pediatric encephalitis cohort. Front Neurol. 2022;13:952317. PubMed PMID: 36237630
• Kammeyer R, Mizenko C, Sillau S, Richie A, Owens G, Nair KV, Alvarez E, Vollmer TL, Bennett JL, Piquet AL. Evaluation of Plasma Neurofilament Light Chain Levels as a Biomarker of Neuronal Injury in the Active and Chronic Phases of Autoimmune Neurologic Disorders. Front Neurol. 2022;13:689975. PubMed PMID: 35309573
• Passeri M, Matthews E, Kammeyer R, Piquet AL. Update in autoimmune and paraneoplastic myelopathies: Newly described antigen targets and antibody testing. Front Neurol. 2022;13:972143. PubMed PMID: 35968301
• Santoro JD, Patel L, Kammeyer R, Filipink RA, Gombolay GY, Cardinale KM, Real de Asua D, Zaman S, Santoro SL, Marzouk SM, Khoshnood M, Vogel BN, Tanna R, Pagarkar D, Dhanani S, Ortega MDC, Partridge R, Stanley MA, Sanders JS, Christy A, Sannar EM, Brown R, McCormick AA, Van Mater H, Franklin C, Worley G, Quinn EA, Capone GT, Chicoine B, Skotko BG, Rafii MS. Assessment and Diagnosis of Down Syndrome Regression Disorder: International Expert Consensus. Front Neurol. 2022;13:940175. PubMed PMID: 35911905
• Santoro JD, Partridge R, Tanna R, Pagarkar D, Khoshnood M, Rehmani M, Kammeyer RM, Gombolay GY, Fisher K, Conravey A, El-Dahr J, Christy AL, Patel L, Manning MA, Van Mater H, Rafii MS, Quinn EA. Evidence of neuroinflammation and immunotherapy responsiveness in individuals with down syndrome regression disorder. J Neurodev Disord. 2022 Jun 3;14(1):35. PubMed PMID: 35659536
• Moore C, Pollard R, Press CA, Hiller M, Maloney J, Barry M, Kammeyer R. A 14-year-old Girl with Right-Sided Weakness and Speech Difficulty. Neurohospitalist. 2022 Apr;12(2):408-412. PubMed PMID: 35419134
• Kammeyer R, Mizenko C, Sillau S, Richie A, Owens G, Nair KV, Alvarez E, Vollmer TL, Bennett JL, Piquet AL. Evaluation of Plasma Neurofilament Light Chain Levels as a Biomarker of Neuronal Injury in the Active and Chronic Phases of Autoimmune Neurologic Disorders. Front Neurol. 2022;13:689975. PubMed PMID: 35309573
• Pointon T, Ward R, Yeshokumar A, Piquet A, Schreiner T, Kammeyer R. Evaluation of multiple consensus criteria for autoimmune encephalitis and temporal analysis of symptoms in a pediatric encephalitis cohort. Front Neurol. 2022;13:952317. PubMed PMID: 36237630
• Passeri M, Matthews E, Kammeyer R, Piquet AL. Update in autoimmune and paraneoplastic myelopathies: Newly described antigen targets and antibody testing. Front Neurol. 2022;13:972143. PubMed PMID: 35968301
• Santoro JD, Patel L, Kammeyer R, Filipink RA, Gombolay GY, Cardinale KM, Real de Asua D, Zaman S, Santoro SL, Marzouk SM, Khoshnood M, Vogel BN, Tanna R, Pagarkar D, Dhanani S, Ortega MDC, Partridge R, Stanley MA, Sanders JS, Christy A, Sannar EM, Brown R, McCormick AA, Van Mater H, Franklin C, Worley G, Quinn EA, Capone GT, Chicoine B, Skotko BG, Rafii MS. Assessment and Diagnosis of Down Syndrome Regression Disorder: International Expert Consensus. Front Neurol. 2022;13:940175. PubMed PMID: 35911905
• Santoro JD, Partridge R, Tanna R, Pagarkar D, Khoshnood M, Rehmani M, Kammeyer RM, Gombolay GY, Fisher K, Conravey A, El-Dahr J, Christy AL, Patel L, Manning MA, Van Mater H, Rafii MS, Quinn EA. Evidence of neuroinflammation and immunotherapy responsiveness in individuals with down syndrome regression disorder. J Neurodev Disord. 2022 Jun 3;14(1):35. PubMed PMID: 35659536
• Moore C, Pollard R, Press CA, Hiller M, Maloney J, Barry M, Kammeyer R. A 14-year-old Girl with Right-Sided Weakness and Speech Difficulty. Neurohospitalist. 2022 Apr;12(2):408-412. PubMed PMID: 35419134
• Kammeyer R, Mizenko C, Sillau S, Richie A, Owens G, Nair KV, Alvarez E, Vollmer TL, Bennett JL, Piquet AL. Evaluation of Plasma Neurofilament Light Chain Levels as a Biomarker of Neuronal Injury in the Active and Chronic Phases of Autoimmune Neurologic Disorders. Front Neurol. 2022;13:689975. PubMed PMID: 35309573
• Kammeyer R, Schreiner T. Cortical Vein Thrombosis, Tortuous Venous Vasculature, and Microhemorrhages in Neurosarcoidosis. JAMA Neurol. 2021 Apr 1;78(4):491-492. PubMed PMID: 33587111
• Kammeyer R, Schreiner T. Cortical Vein Thrombosis, Tortuous Venous Vasculature, and Microhemorrhages in Neurosarcoidosis. JAMA Neurol. 2021 Apr 1;78(4):491-492. PubMed PMID: 33587111
• Kammeyer RM, Orjuela KD. Rapidly Progressive Dementia and Temporal Lobe Atrophy in a Case of Nonketotic Hyperglycemic Hemichorea. Neurohospitalist. 2020 Jul;10(3):229-233. PubMed PMID: 32549949
• Brenton JN, Kammeyer R, Gluck L, Schreiner T, Makhani N. Multiple Sclerosis in Children: Current and Emerging Concepts. Semin Neurol. 2020 Apr;40(2):192-200. PubMed PMID: 32294785
• Kammeyer R, Piquet AL. Multiple co-existing antibodies in autoimmune encephalitis: A case and review of the literature. J Neuroimmunol. 2019 Dec 15;337:577084. PubMed PMID: 31655424
• Kammeyer R, Devnani R, Mehta R. Cerebral fat embolism syndrome mimicking thrombotic thrombocytopenic purpura in a patient with hemoglobin SC disease. Am J Hematol. 2016 May;91(5):539-42. PubMed PMID: 26701328
• Maddison LA, Joest KE, Kammeyer RM, Chen W. Skeletal muscle insulin resistance in zebrafish induces alterations in ß-cell number and glucose tolerance in an age- and diet-dependent manner. Am J Physiol Endocrinol Metab. 2015 Apr 15;308(8):E662-9. PubMed PMID: 25670827
• Kammeyer RM, Pargett MS, Rundell AE. Comparison of CPR outcome predictors between rhythmic abdominal compression and continuous chest compression CPR techniques. Emerg Med J. 2014 May;31(5):394-400. PubMed PMID: 23471166
• Kramer MA, Andrews B, Hugar DL, Jaitli A, Larsen SB, Kline BP, McEllen KN, Agrawal N, Su SM, Dammu SA, Kammeyer RM, Ivanisevic A. Characterization of conformational adsorbate changes on a tissue-derived substrate using Fourier transform infrared spectroscopy. Langmuir. 2010 Dec 7;26(23):18083-8. PubMed PMID: 21067159

Professional Memberships

• American Academy of Neurology, Member
• Child Neurology Society, Member
• Autoimmune Encephalitis Alliance Clinicians Network, Provider
• Childhood Arthritis and Rheumatology Research Alliance, Member

Practice Locations

Children's Hospital Colorado Anschutz Medical Campus
13123 East 16th Ave
Aurora, CO 80045
720-777-1234

UCHealth University of Colorado Hospital (UCH)
12605 E. 16th Ave
Aurora, CO 80045
720-848-0000

Hospital Affiliation

• University of Colorado Hospital
• Children's Hospital Colorado

Specialty Information

Specialties

• Child Neurology, Board Certification
• Neuroimmunology