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Peter A. Merkel, MD, MPH

Peter A. Merkel, MD, MPH Physician

Chief, Division of Rheumatology Professor of Medicine Professor

Dr. Merkel is employed by Penn Medicine.

About Dr. Peter A. Merkel

Recognized by America's Top Doctors, 2014 - 2018

Recognized by Best Doctors in America - 2013 - 2018

Recognized in Philadelphia magazine's annual Top Docs issue, 2013 to 2018


Patient Satisfaction Ratings

Patient Rating Breakdown

The Patient Satisfaction Rating is an average of all responses to the care provider related questions shown below from our nationally-recognized Press Ganey Patient Satisfaction Survey. Patients that are treated in outpatient or hospital environments may receive different surveys, and the volume of responses will vary by question.

Responses are measured on a scale of 1 to 5 with 5 being the best score.

The comments are submitted by patients and reflect their views and opinions. The comments are not endorsed by and do not necessarily reflect the views of Penn Medicine.

Overall Ratings

Patient Comments

Clinical Specialties


  • Rheumatology

Programs & Centers:

Board Certification:

  • Rheumatology, 1994

Practice Locations and Appointments

Insurance Accepted

  • Aetna US Healthcare
  • Amerihealth Caritas
  • Amerihealth Caritas Medicare
  • Cigna
  • Cigna HealthSpring
  • Clover Health Plan
  • CVS Health
  • Devon Health Services (Americare)
  • Gateway Health Plan
  • Geisinger Health Plan
  • HealthAmerica / HealthAssurance, a Coventry Plan
  • HealthPartners
  • HealthPartners Medicare
  • HealthSmart
  • Highmark Blue Shield
  • Horizon Blue Cross Blue Shield of New Jersey
  • Humana / Choicecare
  • Independence Blue Cross (Keystone East)
  • Intergroup
  • Keystone First
  • Keystone First Medicare
  • Multiplan
  • NJ Medicaid
  • NJ Qualcare
  • Oxford Health Plan
  • PA Health and Wellness (Centene) Medicare
  • PA Medicaid
  • PA Medicare
  • Preferred Health Care/LGH
  • Rail Road Medicare / Palmetto GBA
  • Remedy Partners at Penn Medicine
  • Tricare
  • United Healthcare
  • UnitedHealthcare Community Plan
  • US Family Health Plan

Education and Training

Medical School: Yale University
Residency: Hospital of the University of Pennsylvania
Fellowship: Massachusetts General Hospital


American College of Physicians, National American College of Rheumatology, National American Federation of Clinical Research, National Churg Strauss Syndrome Association, National European League Against Rheumatism (EULAR) Guidelines Committee on Classification Criteria for Vasculitis, International International Network for the Study of Systemic Vasculitides, International Member, Scleroderma Clinical Trials Consortium, National New England Rheumatism Society, Local Scleroderma Clinical Trials Consortium, National Scleroderma Foundation, New England Chapter, Local Society of General Internal Medicine, National Takayasu's Arteritis Association, National Vasculitis Foundation, National

Hospital Affiliation

Dr. Merkel is employed by Penn Medicine.

Hospital Privileges:

  • Hospital of the University of Pennsylvania: Has privileges to treat patients in the hospital.
  • Penn Presbyterian Medical Center: Has privileges to treat patients in the hospital.


Selected Publications:

Rhee RL, Gabler NB, Sangani S, Praestgaard A, Merkel PA, Kawut SM.: "Comparison of Treatment Response in Idiopathic and Connective Tissue Disease-Associated Pulmonary Arterial Hypertension" Am J Respir Crit Care Med 192 (9): 1111-7,2015.

Grayson PC, Monach PA, Pagnoux C, Cuthbertson D, Carette S, Hoffman GS, Khalidi NA, Koening CL, Langford CA, Maksimowicz-McKinnon K, Seo P, Specks U, Ytterberg SR, Merkel PA: "Value of commonly measured laboratory tests as biomarkers of disease activity and predictors of relapse in eosinophilic granulomatosis with polyangiitis" Rheumatology (Oxford). 54 (8): 1351-9,2015.

Wallace B, Kafaja S, Furst DE, Berrocal VJ, Merkel PA, Seibold JR, Mayes MD, Khanna D.: "Reliability, validity and responsiveness to change of the Saint George's Respiratory Questionnaire in early diffuse cutaneous systemic sclerosis." Rheumatology (Oxford) 54 (8): 1369-79,2015.

McGeoch L, Carette S, Cuthbertson D, Hoffman GS, Khalidi N, Koening CL, Langford CA, McAlear CA, Moreland L, Monach PA, Seo P, Specks U, Ytterberg SR, Merkel PA, Pagnoux C.: "Cardiac Involvement in Granulomatosis with Polyangiitis." J Rheumatol 42 (7): 1209-12,2015.

Grayson PC, Carmona-Rivera C, Xu L, Lim N, Gao Z, Asare AL, Specks U, Stone JH, Seo P, Spiera RF, Langford CA, Hoffman GS, Kallenberg CG, St Clair EW, Tchao NK, Ytterberg SR, Phippard DJ, Merkel PA, Kaplan MJ, Monach PA;: "Neutrophil-related gene expression and low-density granulocytes associated with disease activity and response to treatment in ANCA-associated vasculitis" Arthritis Rheumatol 67 (7): 1922-32,2015.

Kermani TA, Warrington KJ, Cuthbertson D, Carette S, Hoffman GS, Khalidi NA, Koening CL, Langford CA, Maksimowicz-McKinnon K, McAlear CA, Monach PA, Seo P, Merkel PA, Ytterberg SR: "Disease Relapses among Patients with Giant Cell Arteritis: A Prospective, Longitudinal Cohort Study." J Rheumatol 42 (7): 1213-7,2015.

Hinkofer LC, Hummel AM, Stone JH, Hoffman GS, Merkel PA, Spiera ER, St Clair W, McCune JW, Davis JC, Specks U, Jenne DE.: "Allosteric modulation of proteinase 3 activity by anti-neutrophil cytoplasmic antibodies in granulomatosis with polyangiitis" J Autoimmun 59 : 43-52,2015.

Pagnoux C, Carette S, Khalidi NA, Walsh M, Hiemstra TF, Cuthbertson D, Langford C, Hoffman G, Koening CL, Monach PA, Moreland L, Mouthon L, Seo P, Specks U, Ytterberg S, Westman K, Hoglund P, Harper L, Flossman O, Luqmani R, Savage CO, Rasmussen N, de Groot K, Tesar V, Jayne D, Merkel PA, Guillevin L: "Comparability of patients with ANCA-associated vasculitis enrolled in clinical trials or in observational cohorts" Clin Exp Rheumatol. 33 : 77-83,2015.

Renauer P, Saruhan-Direskeneli G, Coit P, Adler A, Aksu K, Keser G, Alibaz-Oner F, Aydin SZ, Kamali S, Inanc M, Carette S, Cuthbertson D, Hoffman GS, Akar S, Onen F, Akkoc N, Khalidi NA, Koening C, Karadag O, Kiraz S, Langford CA, Maksimowicz-McKinnon K, McAlear CA, Ozbalkan Z, Ates A, Karaaslan Y, Duzgun N, Monach PA, Ozer HT, Erken E, Ozturk MA, Yazici A, Cefle A, Onat AM, Kisacik B, Pagnoux C, Kasifoglu T, Seyahi E, Fresko I, Seo P, 1000 A, Warrington KJ, Ytterberg SR, Cobankara V, Cunninghame-Graham DS: "Genome-wide association study identifies susceptibility loci in IL6, RPS9/LILRB3, and an intergenic locus on chromosome 21q22 in Takayasu's arteritis" Arthritis Rheumatol 67 (5): 1361-8,2015.

Hatemi G1, Melikoglu M, Tunc R, Korkmaz C, Turgut Ozturk B, Mat C, Merkel PA, Calamia KT, Liu Z, Pineda L, Stevens RM, Yazici H, Yazici Y: "Apremilast for Behçet's Syndrome - A Phase 2, Placebo-Controlled Study" N Engl J Med. 372 (16): 1510-8,2015.

Academic Contact Info

Ms. Kathleen Ryan

Hospital of the University of Pennsylvania
Rheumatology Division
3400 Spruce St
5 White

Philadelphia, PA 19104
Phone: (215) 614-4401
Patient appointments: 800-789-7366 (PENN)

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