VIVD09 height - EPSG:6642

WKT

VERTCS["VIVD09_height", 
	VDATUM["Virgin_Islands_Vertical_Datum_of_2009"], 
	PARAMETER["Vertical_Shift", 0.0], 
	PARAMETER["Direction", 1.0], 
	UNIT["Meter", 1.0]]

WKT2

VERTCRS["VIVD09_height", 
	VDATUM["Virgin_Islands_Vertical_Datum_of_2009"], 
	CS[vertical, 1], 
	AXIS["Gravity-related height (H)", up, 
		LENGTHUNIT["Meter", 1.0]], 
	ID["EPSG", "6642"]]

Data from @esri/proj-codes

{
  "wkid": 6642,
  "latestWkid": 6642,
  "macro": "PE_VCS_VIVD09_HT",
  "name": "VIVD09_height",
  "wkt": "VERTCS[\"VIVD09_height\",VDATUM[\"Virgin_Islands_Vertical_Datum_of_2009\"],PARAMETER[\"Vertical_Shift\",0.0],PARAMETER[\"Direction\",1.0],UNIT[\"Meter\",1.0]]",
  "wkt2": "VERTCRS[\"VIVD09_height\",VDATUM[\"Virgin_Islands_Vertical_Datum_of_2009\"],CS[vertical,1],AXIS[\"Gravity-related height (H)\",up,LENGTHUNIT[\"Meter\",1.0]],ID[\"EPSG\",\"6642\"]]",
  "description": "VIVD09 height",
  "authority": "EPSG",
  "version": "8.2.10(10.3.1)",
  "deprecated": "no",
  "areaname": "Virgin Islands, US - onshore",
  "extent": {
    "slat": 17.62,
    "nlat": 18.44,
    "llon": -65.09,
    "rlon": -64.51
  }
}