diff --git a/server/AyaNova/Controllers/ServiceRateController.cs b/server/AyaNova/Controllers/ServiceRateController.cs
index 5e6d3c73..c8b33af7 100644
--- a/server/AyaNova/Controllers/ServiceRateController.cs
+++ b/server/AyaNova/Controllers/ServiceRateController.cs
@@ -150,7 +150,24 @@ namespace AyaNova.Api.Controllers
         }
 
 
-
+        /// <summary>
+        /// Get prior rate Units entered
+        /// </summary>       
+        /// <returns>list of Units</returns>
+        [HttpGet("prior-unit-list")]
+        public async Task<IActionResult> GetPriorUnits()
+        {
+            if (!serverState.IsOpen)
+                return StatusCode(503, new ApiErrorResponse(serverState.ApiErrorCode, null, serverState.Reason));
+            ServiceRateBiz biz = ServiceRateBiz.GetBiz(ct, HttpContext);
+            if (!Authorized.HasReadFullRole(HttpContext.Items, biz.BizType))
+                return StatusCode(403, new ApiNotAuthorizedResponse());
+            if (!ModelState.IsValid)
+                return BadRequest(new ApiErrorResponse(ModelState));
+            var o = await biz.GetPriorUnitsAsync();
+            if (o == null) return NotFound(new ApiErrorResponse(ApiErrorCode.NOT_FOUND));
+            return Ok(ApiOkResponse.Response(o));
+        }
 
 
         //------------
diff --git a/server/AyaNova/biz/ServiceRateBiz.cs b/server/AyaNova/biz/ServiceRateBiz.cs
index 6379562f..453f7d97 100644
--- a/server/AyaNova/biz/ServiceRateBiz.cs
+++ b/server/AyaNova/biz/ServiceRateBiz.cs
@@ -185,7 +185,14 @@ namespace AyaNova.Biz
             }
         }
 
-
+        ////////////////////////////////////////////////////////////////////////////////////////////////
+        //GET PRIOR UNITS LIST
+        //      
+        internal async Task<List<string>> GetPriorUnitsAsync()
+        {
+            var ret = await ct.ServiceRate.AsNoTracking().Select(x => x.Unit).Distinct().OrderBy(x => x).ToListAsync();
+            return ret;
+        }
 
         ////////////////////////////////////////////////////////////////////////////////////////////////
         //SEARCH