diff --git a/changes/730.feature.rst b/changes/730.feature.rst
new file mode 100644
index 000000000..6cd79bf75
--- /dev/null
+++ b/changes/730.feature.rst
@@ -0,0 +1 @@
+Add SUBPRISM_IP/S subarray names to schemas.
diff --git a/src/stdatamodels/jwst/datamodels/schemas/core.schema.yaml b/src/stdatamodels/jwst/datamodels/schemas/core.schema.yaml
index 6fa0b3a11..dd7fca0c5 100644
--- a/src/stdatamodels/jwst/datamodels/schemas/core.schema.yaml
+++ b/src/stdatamodels/jwst/datamodels/schemas/core.schema.yaml
@@ -1008,7 +1008,8 @@ properties:
               - enum:
                  [BRIGHTSKY, MASK1065, MASK1140, MASK1550, MASKLYOT,
                   SLITLESSPRISM, SUB128, SUB256, SUB64, SUBPRISM,
-                  SUB128_IP, SUB64_IP, SLITLESSPRISM_IP, SLITLESSPRISM_IPS, SUBSLIT]
+                  SUB128_IP, SUB64_IP, SLITLESSPRISM_IP, SLITLESSPRISM_IPS, SUBSLIT,
+                  SUBPRISM_IP, SUBPRISM_IPS]
               # NIRCam subarray
               - enum:
                   [FULLP, MASK210R, MASK335R, MASK430R, MASKLWB, MASKSWB,
diff --git a/src/stdatamodels/jwst/datamodels/schemas/keyword_psubarray.schema.yaml b/src/stdatamodels/jwst/datamodels/schemas/keyword_psubarray.schema.yaml
index 406af678e..8cce681db 100644
--- a/src/stdatamodels/jwst/datamodels/schemas/keyword_psubarray.schema.yaml
+++ b/src/stdatamodels/jwst/datamodels/schemas/keyword_psubarray.schema.yaml
@@ -22,6 +22,7 @@ properties:
               BRIGHTSKY|MASK1065|MASK1140|MASK1550|MASKLYOT|\
               SLITLESSPRISM|SUB128|SUB256|SUB64|SUBPRISM|\
               SUB128_IP|SUB64_IP|SLITLESSPRISM_IP|SLITLESSPRISM_IPS|SUBSLIT|\
+              SUBPRISM_IP|SUBPRISM_IPS|\
               FULLP|MASK210R|MASK335R|MASK430R|MASKLWB|MASKSWB|\
               SUB160|SUB160P|SUB320|SUB320A335R|SUB320A430R|SUB320ALWB|\
               SUB320B335R|SUB320B430R|SUB320BLWB|SUB32TATS|SUB32TATSGRISM|SUB32TA_DHS|\
diff --git a/src/stdatamodels/jwst/datamodels/schemas/subarray.schema.yaml b/src/stdatamodels/jwst/datamodels/schemas/subarray.schema.yaml
index aa2a7e685..fb563f28c 100644
--- a/src/stdatamodels/jwst/datamodels/schemas/subarray.schema.yaml
+++ b/src/stdatamodels/jwst/datamodels/schemas/subarray.schema.yaml
@@ -28,7 +28,8 @@ properties:
               - enum:
                  [BRIGHTSKY, MASK1065, MASK1140, MASK1550, MASKLYOT,
                   SLITLESSPRISM, SUB128, SUB256, SUB64, SUBPRISM,
-                  SUB128_IP, SUB64_IP, SLITLESSPRISM_IP, SLITLESSPRISM_IPS, SUBSLIT]
+                  SUB128_IP, SUB64_IP, SLITLESSPRISM_IP, SLITLESSPRISM_IPS, SUBSLIT,
+                  SUBPRISM_IP, SUBPRISM_IPS]
               # NIRCam
               - enum:
                   [FULLP, MASK210R, MASK335R, MASK430R, MASKLWB, MASKSWB,