Dr. Robert Hagan, M.D.

Dr. Robert R. Hagan received his MD from Saint Louis University School of Medicine. He received his general surgery training at The Lahey Clinic in Boston, Massachusetts and his plastic surgery training at The Lahey Clinic and Harvard Medical School hospitals. He continued his education as a fellow at Harvard Medical School in Boston, Massachusetts specializing in hand and microsurgery. Upon returning to the Midwest he completed a craniofacial fellowship at Washington University in St. Louis, MO. 

Currently, Dr. Hagan maintains a private practice at Neuropax Clinic in St. Louis, MO. He has special interests in peripheral nerve surgery and hand/extremity surgery. His diverse training in plastics, hand, peripheral nerve, craniofacial, reconstructive and microsurgery has served him well to understand the many challenges of today’s pain and peripheral nerve disorders.

Peripheral nerve itself includes diabetic neuropathy, compression neuropathies (carpal tunnel, cubital tunnel, tarsal tunnel, etc.), nerve trauma, chronic joint pain, chronic groin pain, chronic migraines, and RSD/causalgia.

Dr. Hagan is committed to the research and further development of peripheral nerve surgery. Neuropax Clinic provides a multi-center platform for clinical research and advancement of surgical techniques. Dr. Hagan has many ongoing studies focused on improving the diagnosis of and treatment of peripheral nerve and pain disorders.

Dr. Hagan and Neuropax Clinic together provide fellowship training in peripheral nerve surgery to teach other surgeons their advanced diagnostic and surgical techniques. He is also a clinical instructor for the Saint Louis University, Department of Surgery, Division of Plastic Surgery.

Dr. Robert Hagan’s professional hospital appointments include Missouri Baptist Hospital and Barnes Jewish-West Country Hospital; all located in St. Louis, Missouri.  He is a member of the American Society of Plastic Surgeons(ASPS), the American Association for Hand Surgery(AAHS), American Society For Peripheral Nerve(ASPN), the American Society for Reconstructive Microsurgery(ASRM), the Association of Extremity Nerve Surgeons(AENS), the American Headache Society(AHS), and the American Diabetes Society(ADS).

Dr. David L. Brown, MD


Dr. Brown received his M.D. degree from Vanderbilt University. He completed General Surgery Residency training at the University of Cincinnati Hospitals. His Plastic Surgery Fellowship training was completed at the University of Michigan. He received additional fellowship training in Reconstructive Microsurgery  St. Vincent’s Hospital in Melbourne, Australia. 

Dr. Brown spent 26 years at the University of Michigan Medical School, where he rose to the rank of Professor in the Section of Plastic Surgery. He was honored to hold the Endowed William C. Grabb Chair.

Dr. Brown is Board Certified by the American Board of Plastic Surgery and is a Fellow of the American College of Surgeons.  

Dr. Brown joined Neuropax in February of 2024. He has a particular interest in helping people in relieving their pain due to peripheral nerve injury. He has performed all types of major reconstructive operations and has found the surgical treatment of chronic pain to be the most rewarding due to the incredible results he has seen with these innovative techniques.  His specialties include pain following mastectomy (PMPS), knee and hip replacement, shingles (PHN), hernia repair, and abdominal nerve pain (ACNES).

Dr. Brown’s hospital appointments include Missouri Baptist Hospital and Barnes Jewish-West Country Hospital in St. Louis, Missouri.

Dr. Brown has served as the President of the American Society for Peripheral Nerve (ASPN), the Board of Directors of the American Society of Plastic Surgeons (ASPS), President of the Michigan Academy of Plastic Surgeons (MAPS), and Parliamentarian of the Plastic Surgery Research Council (PSRC), and is an Oral Boards Examiner for board certification for the American Board Plastic Surgery (ABPS). In addition, he is an active member of several other national societies including the American Association of Plastic Surgeons (AAPS) and the American Society of Reconstructive Microsurgery (ASRM). Dr. Brown co-authored several editions of the well-respected textbook of plastic surgery, The Michigan Manual of Plastic Surgery. He has published over 70 scientific journal articles and 10 book chapters. He has been an invited speaker and has presented his research and clinical work around the world. He has a particular interest in the education of plastic surgeons and has received multiple honors and awards for his teaching.

Nerve Publications by Our Physicians

Neuromas and Nerve Pain in General
  1. Hagan R, Eberlin K, Pickrell B, Hamaguchi R. Reset Neurectomy for Cutaneous Nerve Injuries. PRS Global Open Journal. 2021 Feb, 15th. Doi: 10.1097

  1. Kubiak CA, Kung TA, Brown DL, Cederna PS, Kemp SWP: State-of-the-Art Techniques in Treating Peripheral Nerve Injury. Plast Reconstr Surg 141(3): 702-710, 2018. PM29140901

  1. Ives GC, Kung TA, Nghiem BT, Ursu DC, Brown DL, Cederna PS, Kemp SWP: Current State of the Surgical Treatment of Terminal Neuromas. Neurosurgery 83(3): 354-364, 2018. PM29053875

  1. Kubiak CA, Brown DL: Principles of nerve repair and reconstruction and neuroma management. Grabb and Smith’s Plastic Surgery, Chung, Wolters Kluwer, 2019. 8th, 10, 87-96.

  1. Hart SE, Brown DL: Dermatosensory Peripheral Nerve Interfaces: Prevention of Pain Recurrence Following Sensory Neurectomy. Hand Clin 37(3): 383-389, 2021. PM3425331

  1. Gomez-Rexrode AE, Kennedy SH, Brown DL: Unmasked Neuropathic Pain After Neurectomy: A Case Series and Review of the Literature. Plast Reconstr Surg Glob Open.11(8): e5221, 08/2023. PM37650094

  1. Hespe GE, Brown DL: Management of Neuropathic Pain with Neurectomy Combined with Dermal Sensory Regenerative Peripheral Nerve Interface (DS-RPNI). Semin Plas Surg. In Print.

Migraine Headaches
  1. Hagan R, Khansa I, Janis J. Chapter, Surgical Treatments of the Supraorbital and Supratrochlear nerves: Book, Surgical Treatment of Chronic Headaches and Migraines. March 2020.
  1. Scherer SS, Schiraldi L, Sapino G, Cambiaso-Daniel J, Gualdi A, Peled ZM, Hagan R, Pietramaggiori G. The Greater Occipital Nerve and Obliquus Capitis Inferior Muscle: Anatomical Interactions and Implications for Occipital Pain Syndromes. PRS Journal 2019
  1. Brown DL: Discussion: Efficacy of Surgical Treatment of Migraine Headaches Involving the Auriculotemporal Nerve (Site V). Plastic and Reconstructive Surgery 143(2): 564-565, PM30688902
  1. Hagan RR, Fallucco MA, Janis JE, Supraorbital Rim Syndrome: Definition, Surgical Treatment, and Outcomes for Frontal Headache. PRS Journal 2016.
  1. JanisJE, Barker JC, Javadi C, Ducic I, Hagan R, Guyuron B. A review of current evidence in the surgical treatment of migraine headaches. Plast Reconstr Surg. 2014 Oct;134(4 Suppl 2):131S-41S. doi: 10.1097
  1. JanisJE, Hatef DA, Hagan R, Schaub T, Liu JH, Thakar H, Bolden KM, Heller JB, Kurkjian TJ.  Anatomy of the supratrochlear nerve: implications for the surgical treatment of migraine headaches. Plast Reconstr Surg. 2013 Apr;131(4):743-50.
  1. Vorobeichik L, Fallucco MA, Hagan RR, Chronic daily headaches secondary to greater auricular and lesser occipital neuromas following endolymphatic shunt surgery; BMJ Case Reports 2012; doi: 1136/bcr-2012-007189.
  1. Fallucco M, Janis J, Hagan R, The anatomical morphology of the supraorbital notch: Clinical relevance to the surgical treatment of migraine headaches; PRSJournal 2012.
Trigeminal Neuralgia
  1. Gualdi A, Camiaso-Daniel J, Gatti J, Peled Z, Hagan R, Bertossi D, Wurzer P, Kamolz LP, Scherer S, Pietramaggiori G. Selective denervation of the corrugator supercilia muscle for the treatment of idiopathic trigeminal neuralgia purely paroxysmal distributed in the supraorbital and supratrochlear dermatomes: The journal of Headache and pain 22:9 (2021)
Neck / Face / Shoulder Pain
  1. Brown DL, Dellon AL: Surgical Approach to Injuries of the Cervical Plexus and Its Peripheral Nerve Branches. Plast Reconstr Surg 141(4): 1021-1025, 2018. PM29595737
Thoracic Outlet Syndrome
  1. Hagan R, Ricci J, Eberlin K, Novel Surgical Approach for Decompression of the Scalene Triangle in Neuorgenic Thoracic Outlet Syndrome: J Reconstr Microsurg 2018;34:315-320.
Shoulder / Upper Extremity Pain
  1. Brown DL, Chung KC: Quadrangular space syndrome associated with superficial radial sensory neuropathy. Ann Plast Surg 43(2): 207-210, 1999. PM10454332
  1. Dhawan V, Borschel GH, Brown DL: Acute exertional compartment syndrome of the J Trauma 64(6): 1635-1637, 2008. PM16983294
Mastectomy Pain (PMPS)
  1. Hart S, Agarwal S, Hamill JB, Brown DL: Effective Treatment of Chronic Mastectomy Pain with Intercostal Sensory Neurectomy. Plastic and Reconstructive Surgery 14:5: 876-80, 2022.
Knee Pain 
  1. Cinotto G, Hamill JB, Cederna PS, Kemp SWP, Brown DL: Chronic Neuropathic Knee Pain Treated with Peripheral Nerve Operations Combined with Regenerative Peripheral Nerve Interfaces. Plastic and Reconstructive Surgery.
Amputation Pain / Phantom Pain / Neuroma Pain 
  1. Woo SL, Kung TA, Brown DL, Leonard JA, Kelly BM, Cederna PS: Regenerative Peripheral Nerve Interfaces for the Treatment of Postamputation Neuroma Pain: A Pilot Plast Reconstr Surg Glob Open 4(12): e1038, 2016. PM28293490/PMC5222635
  1. Hooper RC, Cederna PS, Brown DL, Haase SC, Waljee JF, Egeland BM, Kelley BP, Kung TA: Regenerative Peripheral Nerve Interfaces for the Management of Symptomatic Hand and Digital Neuromas. Plast Reconstr Surg Glob Open 8(6): e2792, 2020. PM32766027/PMC7339232
Lower Extremity / Foot Pain
  1. Williams E, Rosson G, Hagan R, Hashemi S, Dellon AL; Soleal Sling Syndrome (Proximal Tibial Nerve Compression): Results of Surgical Decompression; Plastic and Reconstructive Surgery Journal, Volume 129(2).
  1. Dellon AL, Williams E, Rosson G, Hashemi S, Tollestrup T, Hagan R, Peled Z, Gurtmueller G, Ebmer J; Denervation of the Periosteal Origin of the Adductor Muscles in Conjunction with Adductor Fasciotomy in the Surgical Treatment of Refractory Groin Pull; Plastic and Reconstructive Surgery Journal, Volume 28(4).
  1. Lyons DA, Brown DL: Tarsal Tunnel Neurosurgery by Example, Peripheral Nerve Volume, Selden ed; Yang and Wilson vol ed Oxford University Press, Ny, NY, 2017.
  1. Felder JM, Ko JH, Brown DL: Lower Extremity Contemporary Neuroma Management, Eberlein Springer, 2023. In Press.
Nerve Repair
  1. Brown DL, Bennett TM, Dowsing BJ, Hayes A, Abate M, Morrison WA: Immediate and delayed nerve repair: improved muscle mass and function with leukemia inhibitory J Hand Surg Am 27(6): 1048- 1055, 2002. PM12457356
Laboratory Studies About Nerves
  1. Dhawan V, Huang Y-C, Dow D, Birla RK, Brown DL: Neurotization of in vivo tissue engineered contractile, vascularized, 3-dimensional skeletal muscle Plastic and Reconstructive Surgery 16 (3S): 179-80, 2005. 17822360
  1. Brown DL, Bishop DK, Wood SY, Cederna PS: Short-term anti-CD40 ligand costimulatory blockade induces tolerance to peripheral nerve allografts, resulting in improved skeletal muscle Plast Recon Surg 117(7): 2250-2258, 2006. PM16772925
  1. Dhawan V, Lytle IF, Dow DE, Huang YC, Brown DL: Neurotization improves contractile forces of tissue- engineered skeletal muscle. Tissue Eng. 13(11): 2813-2821, 2007. PM17822360
  1. Mungara AK, Brown DL, Bishop DK, Wood SY, Cederna PS: Anti-CD40L monoclonal antibody treatment induces long-term, tissue-specific, immunologic hyporesponsiveness to peripheral nerve allografts. J Reconstr Microsurg 24(3): 189-195, 2008. PM18459087