USA - CONUS and Alaska - onshore - EPSG:6349

WKT

HVCOORDSYS["HVC_NAD_1983_2011_and_NAVD88_height", 
	GEOGCS["GCS_NAD_1983_2011", 
		DATUM["D_NAD_1983_2011", 
			SPHEROID["GRS_1980", 6378137.0, 298.257222101]], 
		PRIMEM["Greenwich", 0.0], 
		UNIT["Degree", 0.0174532925199433]], 
	VERTCS["NAVD_1988", 
		VDATUM["North_American_Vertical_Datum_1988"], 
		PARAMETER["Vertical_Shift", 0.0], 
		PARAMETER["Direction", 1.0], 
		UNIT["Meter", 1.0]]]

WKT2

COMPOUNDCRS["HVC_NAD_1983_2011_and_NAVD88_height", 
	GEOGCRS["GCS_NAD_1983_2011", 
		DYNAMIC[
			FRAMEEPOCH[2010.0], 
			MODEL["HTDP"]], 
		DATUM["D_NAD_1983_2011", 
			ELLIPSOID["GRS_1980", 6378137.0, 298.257222101], 
			ANCHOREPOCH[2010.0]], 
		PRIMEM["Greenwich", 0.0], 
		CS[ellipsoidal, 2], 
		AXIS["Latitude (lat)", north, 
			ORDER[1]], 
		AXIS["Longitude (lon)", east, 
			ORDER[2]], 
		ANGLEUNIT["Degree", 0.0174532925199433]], 
	VERTCRS["NAVD_1988", 
		VDATUM["North_American_Vertical_Datum_1988"], 
		CS[vertical, 1], 
		AXIS["Gravity-related height (H)", up, 
			LENGTHUNIT["Meter", 1.0]]], 
	ID["EPSG", "6349"]]

Data from @esri/proj-codes

{
  "wkid": 6349,
  "latestWkid": 6349,
  "pcsWkid": 0,
  "gcsWkid": 6318,
  "vcsWkid": 5703,
  "macro": "PE_HVC_NAD_1983_2011_NAVD88_HT",
  "name": "HVC_NAD_1983_2011_and_NAVD88_height",
  "wkt": "HVCOORDSYS[\"HVC_NAD_1983_2011_and_NAVD88_height\",GEOGCS[\"GCS_NAD_1983_2011\",DATUM[\"D_NAD_1983_2011\",SPHEROID[\"GRS_1980\",6378137.0,298.257222101]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],VERTCS[\"NAVD_1988\",VDATUM[\"North_American_Vertical_Datum_1988\"],PARAMETER[\"Vertical_Shift\",0.0],PARAMETER[\"Direction\",1.0],UNIT[\"Meter\",1.0]]]",
  "wkt2": "COMPOUNDCRS[\"HVC_NAD_1983_2011_and_NAVD88_height\",GEOGCRS[\"GCS_NAD_1983_2011\",DYNAMIC[FRAMEEPOCH[2010.0],MODEL[\"HTDP\"]],DATUM[\"D_NAD_1983_2011\",ELLIPSOID[\"GRS_1980\",6378137.0,298.257222101],ANCHOREPOCH[2010.0]],PRIMEM[\"Greenwich\",0.0],CS[ellipsoidal,2],AXIS[\"Latitude (lat)\",north,ORDER[1]],AXIS[\"Longitude (lon)\",east,ORDER[2]],ANGLEUNIT[\"Degree\",0.0174532925199433]],VERTCRS[\"NAVD_1988\",VDATUM[\"North_American_Vertical_Datum_1988\"],CS[vertical,1],AXIS[\"Gravity-related height (H)\",up,LENGTHUNIT[\"Meter\",1.0]]],ID[\"EPSG\",\"6349\"]]",
  "description": "USA - CONUS and Alaska - onshore",
  "authority": "EPSG",
  "version": "8.2.2(10.8.0)",
  "deprecated": "no",
  "areaname": "USA - CONUS and Alaska - onshore",
  "extent": {
    "slat": 24.41,
    "nlat": 71.4,
    "llon": -168.26,
    "rlon": -66.91
  }
}