# David A. Chad
**David A. Chad** (also cited as David Chad) is a neuromuscular neurologist, originally from Montreal, Canada, who built and directed the Neuromuscular Medicine Division of the [University of Massachusetts](https://www.edgepedia.org/university-of-massachusetts) (UMass) Department of Neurology for 26 years and is known for clinical-pathological case-conference articles in the *New England Journal of Medicine*. He holds the credential MD, FAAN[1](https://www.aan.com/msa/Public/Events/AbstractDetails/25995). He now practises as a neuromuscular specialist at Reliant Medical Group in [Worcester, Massachusetts](https://www.edgepedia.org/worcester-massachusetts), and holds an Instructor appointment in the Department of Neurology at [UMass Chan Medical School](https://www.edgepedia.org/umass-chan-medical-school)[2](https://profiles.umassmed.edu/display/133219).
| Key fact | Detail |
|---|---|
| Field | Neurology; neuromuscular disease, including ALS, neuropathies, and neuromuscular junction disorders[3](https://reliantmedicalgroup.org/doctors/david-chad/) |
| Training | Internal medicine at Montreal General Hospital; neurology residency at the University of California San Francisco; neuromuscular fellowship at Tufts University, Tufts Medical Center[3](https://reliantmedicalgroup.org/doctors/david-chad/) |
| Signature work | "Case 16-1999", a Massachusetts General Hospital clinical-pathological case conference in the *New England Journal of Medicine*, 1999[4](https://doi.org/10.1056/nejm199905273402108) |
| Division leadership | Established and directed UMass's Neuromuscular Medicine Division from 1982; 26 years in the role, until 2008[5](https://www.umassmed.edu/neurology/spotlights/May-2025-Neuromuscular-Medicine-Research-Team/) |
| ALS center | Took over the Worcester Muscular Dystrophy Association clinic in 1989; in 2005 it became the 32nd MDA-ALS Center in the United States[5](https://www.umassmed.edu/neurology/spotlights/May-2025-Neuromuscular-Medicine-Research-Team/) |
| Current role (2026) | Neuromuscular specialist, Reliant Medical Group, 123 Summer St, Worcester; Instructor in Neurology, UMass Chan Medical School[2](https://profiles.umassmed.edu/display/133219) |
## Education and training
Chad earned both a BSc in Genetics and an MD at [McGill University](https://www.edgepedia.org/mcgill-university) in Montreal[2](https://profiles.umassmed.edu/display/133219).
His clinical training followed the classic academic pathway in three stages: an internal medicine internship and residency at McGill University's Montreal General Hospital, a neurology residency at the University of California San Francisco, and a neuromuscular fellowship at [Tufts University](https://www.edgepedia.org/tufts-university), Tufts Medical Center[3](https://reliantmedicalgroup.org/doctors/david-chad/). His practice has centered on disorders of the muscles, the nerves, and the junctions between them[3](https://reliantmedicalgroup.org/doctors/david-chad/).
## Career in academic neurology
**UMass, 1982 to 2008.** The Neuromuscular Medicine Division of the UMass Department of Neurology was established in 1982 under Chad's guidance, when he was professor of neurology[5](https://www.umassmed.edu/neurology/spotlights/May-2025-Neuromuscular-Medicine-Research-Team/). In 1989 he assumed directorship of the Worcester Muscular Dystrophy Association clinic and relocated the program to the UMass campus; in 2005 the clinic became the 32nd MDA-ALS Center in the United States[5](https://www.umassmed.edu/neurology/spotlights/May-2025-Neuromuscular-Medicine-Research-Team/). He directed the division and its centers for 26 years before leadership passed to a new director in 2008[5](https://www.umassmed.edu/neurology/spotlights/May-2025-Neuromuscular-Medicine-Research-Team/).
**Massachusetts General Hospital period.** By 2015 Chad was at [Massachusetts General Hospital](https://www.edgepedia.org/massachusetts-general-hospital) in Boston, where he served as guest editor of an issue of *Seminars in Neurology* devoted to neuromuscular disorders[6](https://doi.org/10.1055/s-0035-1558970).
**Reliant Medical Group.** His current practice address is Reliant Medical Group, 123 Summer St, Worcester, and his UMass Chan profile lists him as Instructor in the Department of Neurology[2](https://profiles.umassmed.edu/display/133219). The UMass institutional history page, describing the division's 1982 founding, refers to him as professor of neurology; the current profile's Instructor title is the one in force as of 2026[2](https://profiles.umassmed.edu/display/133219) • , • [5](https://www.umassmed.edu/neurology/spotlights/May-2025-Neuromuscular-Medicine-Research-Team/).
## Representative work
His signature work, "Case 16-1999", appeared in the *New England Journal of Medicine* on 27 May 1999 as part of the Case Records of the Massachusetts General Hospital, a long-running series in which a difficult patient's course is presented to expert discussants before the pathological diagnosis is revealed. The case was a 71-year-old right-handed man admitted with progressive muscle weakness and difficulty swallowing, five months after falls from a right footdrop[4](https://doi.org/10.1056/nejm199905273402108). Two later case conferences in the same series carry his name: Case 1-2004 (7 January 2004), a 49-year-old left-handed woman evaluated for painful asymmetric neuropathy after an unsuccessful carpal-tunnel release[7](https://doi.org/10.1056/nejmcpc030034), and Case 14-2011 (11 May 2011), a 52-year-old woman with five months of asymmetric sensory loss, paresthesias, and impaired dexterity in the arms and legs, with asymmetric loss of tendon reflexes but no weakness[8](https://doi.org/10.1056/nejmcpc1012550).
His own analytic publications sit in the same territory. A 1986 paper in *Neurology* reported a 25-year-old man thought to have motor neuron disease whose signs progressed for a year, plateaued, and resolved almost completely three years later; it concluded that a proximal, perhaps demyelinating, motor neuropathy may cause some benign motor neuron syndromes that simulate motor neuron disease[9](https://doi.org/10.1212/wnl.36.9.1260). In May 2002 he authored the *Neurologic Clinics* review "Electrodiagnostic approach to the patient with suspected motor neuron disease", published from the UMass Department of Neurology[10](https://doi.org/10.1016/s0733-8619(01)00011-1). In 2019 he co-authored the *Handbook of Clinical Neurology* chapter "Clinical neurophysiology of demyelinating polyneuropathy"[2](https://profiles.umassmed.edu/display/133219).
## Clinical practice
As a neuromuscular specialist at Reliant Medical Group, Chad treats peripheral neuropathies, myasthenia gravis, myositis, muscular dystrophies, and ALS[3](https://reliantmedicalgroup.org/doctors/david-chad/). The [American Academy of Neurology](https://www.edgepedia.org/american-academy-of-neurology) lists him, as David A. Chad, MD, FAAN, of Reliant Medical Group, as a presenter of the abstract "CMT 4H: A novel mutation", on a mutation in a gene causing Charcot-Marie-Tooth neuropathy[1](https://www.aan.com/msa/Public/Events/AbstractDetails/25995).
## From founding an academic division to community practice
Chad's record traces a path from building an academic division and a designated ALS center to practicing within a large community group practice while keeping a medical-school appointment[5](https://www.umassmed.edu/neurology/spotlights/May-2025-Neuromuscular-Medicine-Research-Team/) • , • [2](https://profiles.umassmed.edu/display/133219). What is notable is that the specialist scope carried over intact: a hospital-based neuromuscular program director treating ALS and myasthenia gravis became a community-practice neuromuscular specialist treating the same conditions[3](https://reliantmedicalgroup.org/doctors/david-chad/), with continued Academy activity[1](https://www.aan.com/msa/Public/Events/AbstractDetails/25995). According to a UMass Chan Medical School spotlight, the division he founded in 1982 passed in 2008 to a new director and, as of 2022, to Lawrence Hayward, MD, PhD[5](https://www.umassmed.edu/neurology/spotlights/May-2025-Neuromuscular-Medicine-Research-Team/).
## References
1. [Abstract Details, American Academy of Neurology](https://www.aan.com/msa/Public/Events/AbstractDetails/25995)
2. [David Chad MD | Profiles RNS, UMass Chan Medical School](https://profiles.umassmed.edu/display/133219)
3. [Dr. David Chad, MD, Reliant Medical Group Neurology](https://reliantmedicalgroup.org/doctors/david-chad/)
4. [Case 16-1999, New England Journal of Medicine](https://doi.org/10.1056/nejm199905273402108)
5. [Neuromuscular Medicine Research Center Team at UMass Chan Medical School and UMass Memorial Health](https://www.umassmed.edu/neurology/spotlights/May-2025-Neuromuscular-Medicine-Research-Team/)
6. [Guest Editors' note, Seminars in Neurology, 2015](https://doi.org/10.1055/s-0035-1558970)
7. [Case 1-2004, New England Journal of Medicine](https://doi.org/10.1056/nejmcpc030034)
8. [Case 14-2011, New England Journal of Medicine](https://doi.org/10.1056/nejmcpc1012550)
9. [Slow resolution of multifocal weakness and fasciculation, Neurology, 1986](https://doi.org/10.1212/wnl.36.9.1260)
10. https://doi.org/10.1016/s0733-8619(01)00011-1
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*Topic: Encyclopedia › Life and health › Life and health scientists › Medical and health researchers › Researchers in clinical neuroscience, neurology, and psychiatry research › Clinical neurology and neurorehabilitation*
*Initially written Sep 21, 2026 · Reviewed: Sep 25, 2026 · Edited: Sep 25, 2026; Oct 15, 2026 · Last review: Sep 25, 2026*
*Copyright 2026 EdgeChat AI, a subsidiary of Biostate AI.*
License: Edgepedia Community License 1.0, https://www.edgepedia.org/edgepedia/license