Ricardo A. Maselli, M.D. for UC Davis Health

Ricardo A. Maselli, M.D.


To see if Ricardo A. Maselli is accepting new patients, or for assistance finding a UC Davis doctor, please call 800-2-UCDAVIS (800-282-3284).




Clinical Neuroscience



Locations and Contact

UC Davis Midtown Ambulatory Care Center

Midtown Neurology Clinic
3160 Folsom Blvd
Sacramento, CA 95816

Get Directions

Phone: 916-734-3588

Additional Numbers

Clinic Phone


Clinic Fax


Physician Referrals

800-4-UCDAVIS (800-482-3284)

Philosophy of Care

My philosophy of practice is first reaching an accurate neurologic diagnosis and then providing the most advanced and efficient available treatments.

Clinical Interests

Dr. Maselli is a neurologist who offers care for adult and children with neuromuscular diseases, including neuropathies, myopathies, myasthenia gravis and motor neuron diseases. He has special interest in congenital myasthenic syndromes and has extensive experience with the diagnosis and treatment of these conditions.

Research/Academic Interests

Dr. Maselli's research is conducted in his laboratory located at UC Davis campus and focuses on finding cures for congenital myasthenic syndromes and motor neuron diseases.



Center/Program Affiliation

Center for Neuroscience

Undergraduate School

Medical Sciences, Buenos Aires University School of Medicine, Buenos Aires, Argentina

Medical School

M.D., Buenos Aires University School of Medicine, Buenos Aires, Argentina 1973


Medicine, Thomason General Hospital/Texas Tech University, El Paso TX 1974-1975


Neurology and Neuropathology, Kingston General Hospital/Queen's University, Kingston, Ontario, Canada 1979-1982


Neurology/Clinical Neurophysiology, University of Chicago Medical Center, Chicago IL 1983-1987

Best Doctors in America, 2003-2019, 2020

Invited lecturer on congenital myasthenic syndromes and ALS at Pitie-Salpetriere Hospital, Paris. France, 2007

Guess of Honor of the Annual Fund Raising Party of the Myasthenia Gravis Foundation of California, 2005

Selected as one of Best Doctors in America, 2001

Director Clinical Neurophysiology Fellowship Program, 2020

Maselli RA, van der Linden H Jr, Ferns M. Recessive congenital myasthenic syndrome caused by a homozygous mutation in SYT2 altering a highly conserved C-terminal amino acid sequence. Am J Med Genet A. 2020 Jul;182(7):1744-1749. doi:10.1002/ajmg.a.61579. Epub 2020 Apr 6. PMID:32250532.

Maselli RA, Arredondo J, Vázquez J, Chong JX; University of Washington Center for Mendelian Genomics, Bamshad MJ, Nickerson DA, Lara M, Ng F, Lo VL, Pytel P, McDonald CM. Presynaptic congenital myasthenic syndrome with a homozygous sequence variant in LAMA5 combines myopia, facial tics, and failure of neuromuscular transmission. Am J Med Genet A. 2017 Aug;173(8):2240-2245. doi:10.1002/ajmg.a.38291. Epub 2017 May 25. PMID:28544784.

Maselli RA, Ng JJ, Anderson JA, Cagney O, Arredondo J, Williams C, Wessel HB, Abdel-Hamid H, Wollmann RL. Mutations in LAMB2 causing a severe form of synaptic congenital myasthenic syndrome. J Med Genet. 2009 Mar;46(3):203-8. doi:10.1136/jmg.2008.063693. PMID:19251977.

Dunne V, Maselli RA. Common founder effect of rapsyn N88K studied using intragenic markers. J Hum Genet. 2004;49(7):366-369. doi:10.1007/s10038-004-0159-y. Epub 2004 Jun 8. PMID:15252722.

Vohra BP, Groshong JS, Maselli RA, Verity MA, Wollmann RL, Gomez CM. Focal caspase activation underlies the endplate myopathy in slow-channel syndrome. Ann Neurol. 2004 Mar;55(3):347-52. doi:10.1002/ana.10823. PMID:14991812.

Maselli RA, Wan J, Dunne V, Graves M, Baloh RW, Wollmann RL, Jen J. Presynaptic failure of neuromuscular transmission and synaptic remodeling in EA2. Neurology. 2003 Dec 23;61(12):1743-8. doi:10.1212/01.wnl.0000099748.41130.9a. PMID:14694040.

Maselli RA, Dunne V, Pascual-Pascual SI, Bowe C, Agius M, Frank R, Wollmann RL. Rapsyn mutations in myasthenic syndrome due to impaired receptor clustering. Muscle Nerve. 2003 Sep;28(3):293-301. doi:10.1002/mus.10433. PMID:12929188.

Maselli RA, Books W, Dunne V. Effect of inherited abnormalities of calcium regulation on human neuromuscular transmission. Ann N Y Acad Sci. 2003 Sep;998:18-28. doi:10.1196/annals.1254.004. PMID:14592859.

Maselli RA, Chen D, Mo D, Bowe C, Fenton G, Wollmann RL. Choline acetyltransferase mutations in myasthenic syndrome due to deficient acetylcholine resynthesis. Muscle Nerve. 2003 Feb;27(2):180-7. doi:10.1002/mus.10300. PMID:12548525.

Dunne V, Maselli RA. Identification of pathogenic mutations in the human rapsyn gene. J Hum Genet. 2003;48(4):204-7. doi:10.1007/s10038-003-0005-7. Epub 2003 Mar 5. PMID:12730725.

Añor S, Lipsitz D, Williams DC, Tripp L, Willits N, Maselli R, LeCouteur RA. Evaluation of jitter by stimulated single-fiber electromyography in normal dogs. J Vet Intern Med. 2003 Jul-Aug;17(4):545-50. doi:10.1111/j.1939-1676.2003.tb02476.x. PMID:12892306.