The Securities and Exchange Commission has not necessarily reviewed the information in this filing and has not determined if it is accurate and complete.
The reader should not assume that the information is accurate and complete.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 13F

FORM 13F INFORMATION TABLE
OMB APPROVAL
OMB Number: 3235-0006
Estimated average burden
hours per response: 23.8
COLUMN 1 COLUMN 2 COLUMN 3 COLUMN 4 COLUMN 5 COLUMN 6 COLUMN 7 COLUMN 8
VALUE SHRS OR SH/ PUT/ INVESTMENT OTHER VOTING AUTHORITY
NAME OF ISSUER TITLE OF CLASS CUSIP (x$1000) PRN AMT PRN CALL DISCRETION MANAGER SOLE SHARED NONE
ABBVIE INC COM 00287Y109 10,908 150,000 SH   SOLE   150,000 0 0
ACADIA HEALTHCARE COMPANY IN COM 00404A109 36,872 1,055,000 SH   SOLE   1,055,000 0 0
ACHILLION PHARMACEUTICALS IN COM 00448Q201 7,906 2,950,000 SH   SOLE   2,950,000 0 0
ACLARIS THERAPEUTICS INC COM 00461U105 4,441 2,028,000 SH   SOLE   2,028,000 0 0
ADAPTIMMUNE THERAPEUTICS PLC SPONDS ADR 00653A107 3,518 875,000 SH   SOLE   875,000 0 0
ADAPTIVE BIOTECHNOLOGIES COR COM 00650F109 28,980 600,000 SH   SOLE   600,000 0 0
AEGLEA BIOTHERAPEUTICS INC COM 00773J103 5,480 800,000 SH   SOLE   800,000 0 0
AGILENT TECHNOLOGIES INC COM 00846U101 13,650 182,800 SH   SOLE   182,800 0 0
AGIOS PHARMACEUTICALS INC COM 00847X104 8,505 170,500 SH   SOLE   170,500 0 0
AKERO THERAPEUTICS INC COM 00973Y108 4,309 225,000 SH   SOLE   225,000 0 0
ALDER BIOPHARMACEUTICALS INC COM 014339105 18,388 1,562,300 SH   SOLE   1,562,300 0 0
ALDER BIOPHARMACEUTICALS INC NOTE 2.500% 2/0 014339AA3 4,672 5,000,000 PRN   SOLE   5,000,000 0 0
ALEXION PHARMACEUTICALS INC COM 015351109 31,763 242,500 SH   SOLE   242,500 0 0
ALIGN TECHNOLOGY INC COM 016255101 28,739 105,000 SH   SOLE   105,000 0 0
ALLAKOS INC COM 01671P100 17,505 404,000 SH   SOLE   404,000 0 0
ALNYLAM PHARMACEUTICALS INC COM 02043Q107 23,778 327,700 SH   SOLE   327,700 0 0
AMARIN CORP PLC SPONS ADR NEW 023111206 87,740 4,525,000 SH   SOLE   4,525,000 0 0
AMICUS THERAPEUTICS INC COM 03152W109 12,480 1,000,000 SH   SOLE   1,000,000 0 0
ANAPTYSBIO INC COM 032724106 12,328 218,500 SH   SOLE   218,500 0 0
ANTHEM INC COM 036752103 5,644 20,000 SH   SOLE   20,000 0 0
ARDELYX INC COM 039697107 5,380 2,000,000 SH   SOLE   2,000,000 0 0
ARGENX SE SPONSORED ADR 04016X101 25,725 181,700 SH   SOLE   181,700 0 0
ARVINAS INC COM 04335A105 3,299 150,000 SH   SOLE   150,000 0 0
ASCENDIS PHARMA A S SPONSORED ADR 04351P101 24,585 213,500 SH   SOLE   213,500 0 0
ASSEMBLY BIOSCIENCES INC COM 045396108 7,554 560,000 SH   SOLE   560,000 0 0
AUDENTES THERAPEUTICS INC COM 05070R104 15,523 410,000 SH   SOLE   410,000 0 0
AXOGEN INC COM 05463X106 11,959 603,970 SH   SOLE   603,970 0 0
AXONICS MODULATION TECH INC COM 05465P101 16,388 400,000 SH   SOLE   400,000 0 0
BAXTER INTL INC COM 071813109 24,627 300,700 SH   SOLE   300,700 0 0
BEIGENE LTD SPONSORED ADR 07725L102 26,624 214,800 SH   SOLE   214,800 0 0
BIOGEN INC COM 09062X103 22,802 97,500 SH Call SOLE   97,500 0 0
BIOHAVEN PHARMACTL HLDG CO L COM G11196105 15,042 343,500 SH   SOLE   343,500 0 0
BIOMARIN PHARMACEUTICAL INC COM 09061G101 12,205 142,500 SH   SOLE   142,500 0 0
BLUEBIRD BIO INC COM 09609G100 5,978 47,000 SH   SOLE   47,000 0 0
BLUEPRINT MEDICINES CORP COM 09627Y109 29,006 307,500 SH   SOLE   307,500 0 0
BOSTON SCIENTIFIC CORP COM 101137107 41,691 970,000 SH   SOLE   970,000 0 0
BRISTOL MYERS SQUIBB CO COM 110122108 47,618 1,050,000 SH   SOLE   1,050,000 0 0
CELGENE CORP COM 151020104 17,115 185,150 SH   SOLE   185,150 0 0
CHIASMA INC COM 16706W102 4,856 650,000 SH   SOLE   650,000 0 0
CIGNA CORP NEW COM 125523100 28,721 182,300 SH   SOLE   182,300 0 0
CLOVIS ONCOLOGY INC COM 189464100 3,807 256,000 SH   SOLE   256,000 0 0
COHERUS BIOSCIENCES INC COM 19249H103 41,548 1,880,000 SH   SOLE   1,880,000 0 0
COLLEGIUM PHARMACEUTICAL INC COM 19459J104 20,749 1,577,893 SH   SOLE   1,577,893 0 0
COMPUGEN LTD ORD M25722105 4,224 1,100,000 SH   SOLE   1,100,000 0 0
CORREVIO PHARMA CORP COM 22026V105 2,592 1,200,000 SH   SOLE   1,200,000 0 0
CORVUS PHARMACEUTICALS INC COM 221015100 1,496 400,000 SH   SOLE   400,000 0 0
COVETRUS INC COM 22304C100 788 32,231 SH   SOLE   32,231 0 0
CYMABAY THERAPEUTICS INC COM 23257D103 6,444 900,000 SH   SOLE   900,000 0 0
DERMIRA INC COM 24983L104 7,409 775,000 SH   SOLE   775,000 0 0
DERMIRA INC NOTE 3.000% 5/1 24983LAB0 865 1,000,000 PRN   SOLE   1,000,000 0 0
DYNAVAX TECHNOLOGIES CORP COM NEW 268158201 2,594 650,000 SH   SOLE   650,000 0 0
EDWARDS LIFESCIENCES CORP COM 28176E108 33,900 183,500 SH   SOLE   183,500 0 0
ENCOMPASS HEALTH CORP COM 29261A100 51,005 805,000 SH   SOLE   805,000 0 0
EPIZYME INC COM 29428V104 23,219 1,850,100 SH   SOLE   1,850,100 0 0
EXACT SCIENCES CORP COM 30063P105 46,862 397,000 SH   SOLE   397,000 0 0
FIBROGEN INC COM 31572Q808 13,825 306,000 SH   SOLE   306,000 0 0
FIVE PRIME THERAPEUTICS INC COM 33830X104 3,172 526,100 SH   SOLE   526,100 0 0
FRESHPET INC COM 358039105 10,695 235,000 SH   SOLE   235,000 0 0
GALAPAGOS NV SPON ADR 36315X101 21,273 165,000 SH   SOLE   165,000 0 0
GAMIDA CELL LTD SHS M47364100 5,080 1,000,000 SH   SOLE   1,000,000 0 0
GLOBAL BLOOD THERAPEUTICS IN COM 37890U108 13,939 265,000 SH   SOLE   265,000 0 0
GLOBAL CORD BLOOD CORPORATIO SHS G39342103 5,347 925,000 SH   SOLE   925,000 0 0
GUARDANT HEALTH INC COM 40131M109 16,403 190,000 SH   SOLE   190,000 0 0
GW PHARMACEUTICALS PLC ADS 36197T103 104,296 605,000 SH   SOLE   605,000 0 0
HCA HEALTHCARE INC COM 40412C101 61,502 455,000 SH   SOLE   455,000 0 0
HERON THERAPEUTICS INC COM 427746102 558 30,000 SH   SOLE   30,000 0 0
HOMOLOGY MEDICINES INC COM 438083107 8,317 425,000 SH   SOLE   425,000 0 0
IDEXX LABS INC COM 45168D104 33,095 120,200 SH   SOLE   120,200 0 0
IMMUNOMEDICS INC COM 452907108 12,414 895,000 SH   SOLE   895,000 0 0
INCYTE CORP COM 45337C102 26,533 312,300 SH   SOLE   312,300 0 0
INSMED INC COM PAR $.01 457669307 22,784 890,000 SH   SOLE   890,000 0 0
INSMED INC NOTE 1.750% 1/1 457669AA7 5,849 6,000,000 PRN   SOLE   6,000,000 0 0
INSULET CORP COM 45784P101 29,188 244,500 SH   SOLE   244,500 0 0
INTERCEPT PHARMACEUTICALS IN COM 45845P108 3,979 50,000 SH   SOLE   50,000 0 0
INTERSECT ENT INC COM 46071F103 17,980 790,000 SH   SOLE   790,000 0 0
INTUITIVE SURGICAL INC COM NEW 46120E602 79,994 152,500 SH   SOLE   152,500 0 0
INVITAE CORP COM 46185L103 26,438 1,125,000 SH   SOLE   1,125,000 0 0
IRHYTHM TECHNOLOGIES INC COM 450056106 39,510 499,615 SH   SOLE   499,615 0 0
KALEIDO BIOSCIENCES INC COM 483347100 1,161 100,050 SH   SOLE   100,050 0 0
KARUNA THERAPEUTICS INC COM 48576A100 8,278 413,500 SH   SOLE   413,500 0 0
LA JOLLA PHARMACEUTICAL CO COM PAR $.0001 2 503459604 3,931 425,000 SH   SOLE   425,000 0 0
MACROGENICS INC COM 556099109 5,091 300,000 SH   SOLE   300,000 0 0
MADRIGAL PHARMACEUTICALS INC COM 558868105 26,926 256,900 SH   SOLE   256,900 0 0
MEDICINES CO COM 584688105 29,176 800,000 SH   SOLE   800,000 0 0
MEDICINES CO NOTE 2.500% 1/1 584688AE5 3,618 3,000,000 PRN   SOLE   3,000,000 0 0
MEDICINES CO NOTE 2.750% 7/1 584688AG0 5,026 5,000,000 PRN   SOLE   5,000,000 0 0
MERSANA THERAPEUTICS INC COM 59045L106 5,670 1,400,000 SH   SOLE   1,400,000 0 0
MIRATI THERAPEUTICS INC COM 60468T105 20,858 202,500 SH   SOLE   202,500 0 0
MOLINA HEALTHCARE INC COM 60855R100 29,487 206,000 SH   SOLE   206,000 0 0
MOMENTA PHARMACEUTICALS INC COM 60877T100 4,980 400,000 SH   SOLE   400,000 0 0
MYOVANT SCIENCES LTD COM G637AM102 4,073 450,000 SH   SOLE   450,000 0 0
NABRIVA THERAPEUTICS PLC SHS G63637105 3,888 1,600,000 SH   SOLE   1,600,000 0 0
NEUROCRINE BIOSCIENCES INC COM 64125C109 86,372 1,023,000 SH   SOLE   1,023,000 0 0
NEUROCRINE BIOSCIENCES INC NOTE 2.250% 5/1 64125CAD1 1,317 1,000,000 PRN   SOLE   1,000,000 0 0
NEVRO CORP COM 64157F103 12,674 195,500 SH   SOLE   195,500 0 0
NGM BIOPHARMACEUTICALS INC COM 62921N105 5,140 351,100 SH   SOLE   351,100 0 0
NOVAVAX INC COM NEW 670002401 952 162,500 SH   SOLE   162,500 0 0
NOVOCURE LTD ORD SHS G6674U108 12,330 195,000 SH   SOLE   195,000 0 0
OBSEVA SA COM H5861P103 12,667 1,120,000 SH   SOLE   1,120,000 0 0
ODONATE THERAPEUTICS INC COM 676079106 15,777 430,000 SH   SOLE   430,000 0 0
PACIRA BIOSCIENCES COM 695127100 54,363 1,250,000 SH   SOLE   1,250,000 0 0
PACIRA BIOSCIENCES NOTE 2.375% 4/0 695127AD2 1,026 1,000,000 PRN   SOLE   1,000,000 0 0
PARATEK PHARMACEUTICALS INC COM 699374302 1,796 450,000 SH   SOLE   450,000 0 0
PENUMBRA INC COM 70975L107 38,240 239,000 SH   SOLE   239,000 0 0
PHASEBIO PHARMACEUTICALS INC COM 717224109 18,673 1,423,256 SH   SOLE   1,423,256 0 0
PORTOLA PHARMACEUTICALS INC COM 737010108 27,347 1,008,000 SH   SOLE   1,008,000 0 0
PRA HEALTH SCIENCES INC COM 69354M108 23,796 240,000 SH   SOLE   240,000 0 0
PROTEOSTASIS THERAPEUTICS IN COM 74373B109 390 400,000 SH   SOLE   400,000 0 0
PUMA BIOTECHNOLOGY INC COM 74587V107 6,792 534,400 SH   SOLE   534,400 0 0
RA PHARMACEUTICALS INC COM 74933V108 24,176 804,000 SH   SOLE   804,000 0 0
RADIUS HEALTH INC COM NEW 750469207 30,450 1,250,000 SH   SOLE   1,250,000 0 0
RADIUS HEALTH INC NOTE 3.000% 9/0 750469AA6 1,361 1,500,000 PRN   SOLE   1,500,000 0 0
RESTORBIO INC COM 76133L103 4,080 400,000 SH   SOLE   400,000 0 0
RETROPHIN INC COM 761299106 19,086 950,000 SH   SOLE   950,000 0 0
RHYTHM PHARMACEUTICALS INC COM 76243J105 5,170 235,000 SH   SOLE   235,000 0 0
RIGEL PHARMACEUTICALS INC COM NEW 766559603 10,962 4,200,000 SH   SOLE   4,200,000 0 0
RTI SURGICAL HOLDINGS INC COM 74975N105 8,288 1,950,000 SH   SOLE   1,950,000 0 0
SAGE THERAPEUTICS INC COM 78667J108 16,936 92,500 SH   SOLE   92,500 0 0
SAREPTA THERAPEUTICS INC COM 803607100 49,384 325,000 SH   SOLE   325,000 0 0
SEATTLE GENETICS INC COM 812578102 16,749 242,000 SH   SOLE   242,000 0 0
SPARK THERAPEUTICS INC COM 84652J103 51,740 505,371 SH   SOLE   505,371 0 0
SPERO THERAPEUTICS INC COM 84833T103 6,043 525,000 SH   SOLE   525,000 0 0
STRYKER CORP COM 863667101 36,799 179,000 SH   SOLE   179,000 0 0
TELEFLEX INC COM 879369106 43,050 130,000 SH   SOLE   130,000 0 0
THERAVANCE BIOPHARMA INC COM G8807B106 8,982 550,000 SH   SOLE   550,000 0 0
THERAVANCE BIOPHARMA INC NOTE 3.250%11/0 88339KAA0 1,290 1,500,000 PRN   SOLE   1,500,000 0 0
THERMO FISHER SCIENTIFIC INC COM 883556102 23,788 81,000 SH   SOLE   81,000 0 0
TRANSLATE BIO INC COM 89374L104 12,746 1,009,179 SH   SOLE   1,009,179 0 0
ULTRAGENYX PHARMACEUTICAL IN COM 90400D108 36,830 580,000 SH   SOLE   580,000 0 0
UNITEDHEALTH GROUP INC COM 91324P102 144,210 591,000 SH   SOLE   591,000 0 0
VERTEX PHARMACEUTICALS INC COM 92532F100 37,226 203,000 SH   SOLE   203,000 0 0
WELLCARE HEALTH PLANS INC COM 94946T106 91,365 320,500 SH   SOLE   320,500 0 0
WEST PHARMACEUTICAL SVSC INC COM 955306105 17,208 137,500 SH   SOLE   137,500 0 0
ZAI LAB LTD ADR 98887Q104 19,179 550,000 SH   SOLE   550,000 0 0
ZOGENIX INC COM NEW 98978L204 11,228 235,000 SH   SOLE   235,000 0 0