Philippe Gabriel Steg est né le à Paris, dans une famille juive ashkénaze et séfarade. Son père, le professeur Ady Steg est un éminent urologue et sa mère, docteur Gilberte Steg (née Nissim à Salonique) est une gynécologue.
Il est marié et a quatre enfants, Samuel Steg, Clara Steg, Elie Steg, Nathaniel Steg.
(en) Steg PG, Bhatt DL, Wilson PW, D'Agostino R Sr, Ohman EM, Rother J, Liau CS, Hirsch AT, Mas JL, Ikeda Y, Pencina MJ, Goto S; REACH Registry Investigators. One-year cardiovascular event rates in outpatients with atherothrombosis. JAMA. 2007 Mar 21;297(11):1197-206.
(en) Bhatt DL, Eagle KA, Ohman EM, Hirsch AT, Goto S, Mahoney EM, Wilson PW, Alberts MJ, D'Agostino R, Liau CS, Mas JL, Röther J, Smith SC Jr, Salette G, Contant CF, Massaro JM, Steg PG; for the REACH Registry Investigators. Comparative Determinants of 4-Year Cardiovascular Event Rates in Stable Outpatients at Risk of or With Atherothrombosis. JAMA. 2010 304:1350-7
(en) The FUTURA/OASIS-8 Trial Group, Steg PG, Jolly SS, Mehta SR, Afzal R, Xavier D, Rupprecht HJ, López-Sendón JL, Budaj A, Diaz R, Avezum A, Widimsky P, Rao SV, Chrolavicius S, Meeks B, Joyner C, Pogue J, Yusuf S. Low-Dose vs Standard-Dose Unfractionated Heparin for Percutaneous Coronary Intervention in Acute Coronary Syndromes Treated With Fondaparinux: The FUTURA/OASIS-8 Randomized Trial. JAMA. 2010 304:1339-49.
(en) Steg PG, James SK, Harrington RA, Ardissino D, Becker RC, Cannon CP, Emanuelsson H, Finkelstein A, Husted S, Katus H, Kilhamn J, Olofsson S, Stoery RF, Weaver WD, Wallentin L for the PLATO study group. Ticagrelor versus Clopidogrel in Patients with ST-elevation Acute Coronary Syndromes Intended for Reperfusion with Primary PCI ; a PLATelet Inhibition and Patient Outcomes (PLATO) trial subgroup analysis. Circulation 2010 ;122 :2131-41
(en) Wallentin L, James S, Storey RF, Armstrong M, Barratt BJ, Horrow J, Husted S, Katus H, Steg PG, Shah SH, Becker RC; for the PLATO investigators. Effect of CYP2C19 and ABCB1 single nucleotide polymorphisms on outcomes of treatment with ticagrelor versus clopidogrel for acute coronary syndromes: a genetic substudy of the PLATO trial. The Lancet. 2010 ;376 :1320-8