diff --git a/1542.mosaic_pipeline.rst b/1542.mosaic_pipeline.rst
new file mode 100644
index 000000000..2fc68647d
--- /dev/null
+++ b/1542.mosaic_pipeline.rst
@@ -0,0 +1 @@
+Change the default suffix for mosaic products from _i2d to _coadd
diff --git a/changes/1542.mosaic_pipeline.rst b/changes/1542.mosaic_pipeline.rst
new file mode 100644
index 000000000..2fc68647d
--- /dev/null
+++ b/changes/1542.mosaic_pipeline.rst
@@ -0,0 +1 @@
+Change the default suffix for mosaic products from _i2d to _coadd
diff --git a/romancal/associations/skycell_asn.py b/romancal/associations/skycell_asn.py
index 0502bf369..b323d2b06 100644
--- a/romancal/associations/skycell_asn.py
+++ b/romancal/associations/skycell_asn.py
@@ -62,7 +62,6 @@ def skycell_asn(self):
         root_asn_name = self.parsed.output_file_root
         product_type = self.parsed.product_type
         product_release = self.parsed.release_product
-        suffix = "coadd"
         sep = "_"
 
         product_name_mapping = {
@@ -92,8 +91,6 @@ def skycell_asn(self):
             + patch_name
             + sep
             + filter_id
-            + sep
-            + suffix
         )
 
         with open(asn_file_name + "_asn.json", "w") as outfile:
diff --git a/romancal/outlier_detection/_fileio.py b/romancal/outlier_detection/_fileio.py
index 0b6fdc857..e411d20d6 100644
--- a/romancal/outlier_detection/_fileio.py
+++ b/romancal/outlier_detection/_fileio.py
@@ -13,7 +13,7 @@ def save_median(example_model, median_data, median_wcs, make_output_path):
 
 
 def save_drizzled(drizzled_model, make_output_path):
-    _save_intermediate_output(drizzled_model, "outlier_i2d", make_output_path)
+    _save_intermediate_output(drizzled_model, "outlier_coadd", make_output_path)
 
 
 def _make_median_model(example_model, data, wcs):
diff --git a/romancal/pipeline/mosaic_pipeline.py b/romancal/pipeline/mosaic_pipeline.py
index 0276225fe..8b31408a7 100644
--- a/romancal/pipeline/mosaic_pipeline.py
+++ b/romancal/pipeline/mosaic_pipeline.py
@@ -100,7 +100,7 @@ def process(self, input):
                 if skycell_name in skycell_record["name"]:
                     # skycell name are in the form of r270dm90x99y99
                     # example of product name "r0099101001001001001_F158_visit_r270dm90x99y99"
-                    skycell_file_name = product_name + "_i2d.asdf"
+                    skycell_file_name = product_name + "_coadd.asdf"
 
                     # check to see if there exists a skycell on disk if not create it
                     if not isfile(skycell_file_name):
@@ -129,7 +129,7 @@ def process(self, input):
                             self.resample.output_shape,
                         )
                         wcs_file = asdf.open(self.resample.output_wcs)
-                        self.suffix = "i2d"
+                        self.suffix = "coadd"
                         self.output_file = input.asn["products"][0]["name"]
                         result = self.resample.run(result)
                         self.sourcecatalog.output_file = self.output_file
@@ -139,12 +139,12 @@ def process(self, input):
                         exit(0)
 
             else:
-                self.resample.suffix = "i2d"
+                self.resample.suffix = "coadd"
                 self.output_file = input.asn["products"][0]["name"]
                 result = self.resample.run(result)
                 self.sourcecatalog.output_file = self.output_file
                 result_catalog = self.sourcecatalog.run(result)  # noqa: F841
-                self.suffix = "i2d"
+                self.suffix = "coadd"
                 if input_filename:
                     result.meta.filename = self.output_file
 
diff --git a/romancal/regtest/test_catalog.py b/romancal/regtest/test_catalog.py
index 8f525fd4e..ad1439a8e 100644
--- a/romancal/regtest/test_catalog.py
+++ b/romancal/regtest/test_catalog.py
@@ -12,8 +12,8 @@
 @pytest.fixture(
     scope="module",
     params=[
-        "r0099101001001001001_r274dp63x31y81_prompt_F158_i2d.asdf",
-        "r0099101001001001001_F158_visit_i2d.asdf",
+        "r0099101001001001001_r274dp63x31y81_prompt_F158_coadd.asdf",
+        "r0099101001001001001_F158_visit_coadd.asdf",
         "r0000101001001001001_0001_wfi01_cal.asdf",
     ],
     ids=["L3", "L2", "L3skycell"],
diff --git a/romancal/regtest/test_mos_pipeline.py b/romancal/regtest/test_mos_pipeline.py
index 1e22438ac..cf799812b 100644
--- a/romancal/regtest/test_mos_pipeline.py
+++ b/romancal/regtest/test_mos_pipeline.py
@@ -20,7 +20,7 @@ def run_mos(rtdata_module):
     rtdata.get_asn("WFI/image/L3_regtest_asn.json")
 
     # Test Pipeline
-    output = "r0099101001001001001_F158_visit_i2d.asdf"
+    output = "r0099101001001001001_F158_visit_coadd.asdf"
     rtdata.output = output
 
     args = [
diff --git a/romancal/regtest/test_mos_skycell_pipeline.py b/romancal/regtest/test_mos_skycell_pipeline.py
index b2659ce8f..ce5953d96 100644
--- a/romancal/regtest/test_mos_skycell_pipeline.py
+++ b/romancal/regtest/test_mos_skycell_pipeline.py
@@ -15,7 +15,7 @@ def run_mos(rtdata_module):
 
     # Test Pipeline
     rtdata.get_asn("WFI/image/L3_mosaic_asn.json")
-    output = "r0099101001001001001_r274dp63x31y81_prompt_F158_i2d.asdf"
+    output = "r0099101001001001001_r274dp63x31y81_prompt_F158_coadd.asdf"
     rtdata.output = output
     args = [
         "roman_mos",
diff --git a/romancal/resample/resample.py b/romancal/resample/resample.py
index 56a6332bc..aa01c1b11 100644
--- a/romancal/resample/resample.py
+++ b/romancal/resample/resample.py
@@ -238,7 +238,7 @@ def resample_group(self, input_models, indices):
             output_root = "_".join(
                 example_image.meta.filename.replace(output_type, "").split("_")[:-1]
             )
-            output_model.meta.filename = f"{output_root}_outlier_i2d{output_type}"
+            output_model.meta.filename = f"{output_root}_outlier_coadd{output_type}"
             input_models.shelve(example_image, indices[0], modify=False)
             output_model.meta.basic.location_name = self.location_name
             del example_image
@@ -315,7 +315,7 @@ def resample_many_to_many(self):
         if not self.in_memory:
             # build ModelLibrary as an association from the output files
             # this saves memory if there are multiple groups
-            asn = asn_from_list(output_models, product_name="outlier_i2d")
+            asn = asn_from_list(output_models, product_name="outlier_coadd")
             asn_dict = json.loads(
                 asn.dump()[1]
             )  # serializes the asn and converts to dict
diff --git a/romancal/scripts/make_regtestdata.sh b/romancal/scripts/make_regtestdata.sh
index f3e97d542..dcf2afc3b 100644
--- a/romancal/scripts/make_regtestdata.sh
+++ b/romancal/scripts/make_regtestdata.sh
@@ -183,11 +183,11 @@ l3name="r0099101001001001001_F158_visit"
 asn_from_list r0000101001001001001_0001_wfi01_cal.asdf r0000101001001001001_0002_wfi01_cal.asdf r0000101001001001001_0003_wfi01_cal.asdf -o L3_regtest_asn.json --product-name $l3name
 strun roman_mos L3_regtest_asn.json
 cp L3_regtest_asn.json $outdir/roman-pipeline/dev/WFI/image/
-cp ${l3name}_i2d.asdf $outdir/roman-pipeline/dev/WFI/image/
-cp ${l3name}_i2d.asdf $outdir/roman-pipeline/dev/truth/WFI/image/
+cp ${l3name}_coadd.asdf $outdir/roman-pipeline/dev/WFI/image/
+cp ${l3name}_coadd.asdf $outdir/roman-pipeline/dev/truth/WFI/image/
 
 # L3 catalog
-strun romancal.step.SourceCatalogStep ${l3name}_i2d.asdf
+strun romancal.step.SourceCatalogStep ${l3name}_coadd.asdf
 cp ${l3name}_cat.asdf $outdir/roman-pipeline/dev/truth/WFI/image/
 
 
@@ -195,11 +195,11 @@ l3name="r0099101001001001001_r274dp63x31y81_prompt_F158"
 asn_from_list r0000101001001001001_0001_wfi01_cal.asdf r0000101001001001001_0002_wfi01_cal.asdf r0000101001001001001_0003_wfi01_cal.asdf -o L3_mosaic_asn.json --product-name $l3name --target r274dp63x31y81
 strun roman_mos L3_mosaic_asn.json
 cp L3_mosaic_asn.json $outdir/roman-pipeline/dev/WFI/image/
-cp ${l3name}_i2d.asdf $outdir/roman-pipeline/dev/WFI/image/
-cp ${l3name}_i2d.asdf $outdir/roman-pipeline/dev/truth/WFI/image/
+cp ${l3name}_coadd.asdf $outdir/roman-pipeline/dev/WFI/image/
+cp ${l3name}_coadd.asdf $outdir/roman-pipeline/dev/truth/WFI/image/
 
 # L3 catalog
-strun romancal.step.SourceCatalogStep ${l3name}_i2d.asdf
+strun romancal.step.SourceCatalogStep ${l3name}_coadd.asdf
 cp ${l3name}_cat.asdf $outdir/roman-pipeline/dev/truth/WFI/image/
 
 # L2 catalog
@@ -210,14 +210,14 @@ cp r0000101001001001001_0001_wfi01_cat.asdf $outdir/roman-pipeline/dev/truth/WFI
 l3name="r0099101001001001001_r274dp63x31y81_prompt_F158"
 asn_from_list --product-name=$l3name r0000101001001001001_0001_wfi01_cal.asdf r0000101001001001001_0002_wfi01_cal.asdf r0000101001001001001_0003_wfi01_cal.asdf -o L3_m1_asn.json
 strun roman_mos L3_m1_asn.json
-cp ${l3name}_i2d.asdf $outdir/roman-pipeline/dev/truth/WFI/image/
+cp ${l3name}_coadd.asdf $outdir/roman-pipeline/dev/truth/WFI/image/
 
 # L3 skycell catalog
-strun romancal.step.SourceCatalogStep ${l3name}_i2d.asdf
+strun romancal.step.SourceCatalogStep ${l3name}_coadd.asdf
 cp ${l3name}_cat.asdf $outdir/roman-pipeline/dev/truth/WFI/image/
 
 # multiband catalog
-asn_from_list --product-name=${l3name}_mbcat ${l3name}_i2d.asdf -o L3_skycell_mbcat_asn.json
+asn_from_list --product-name=${l3name}_mbcat ${l3name}_coadd.asdf -o L3_skycell_mbcat_asn.json
 strun romancal.step.MultibandCatalogStep L3_skycell_mbcat_asn.json --deblend True
 
 # tests passing suffix to the pipeline