diff --git a/OmnipodKit/OmnipodCommon/PendingCommand.swift b/OmnipodKit/OmnipodCommon/PendingCommand.swift
index bdfdd2e..2480357 100644
--- a/OmnipodKit/OmnipodCommon/PendingCommand.swift
+++ b/OmnipodKit/OmnipodCommon/PendingCommand.swift
@@ -13,7 +13,7 @@ import Foundation
 enum StartProgram: RawRepresentable {
     typealias RawValue = [String: Any]
 
-    case bolus(volume: Double, automatic: Bool)
+    case bolus(volume: Double, automatic: Bool, bolusReference: UUID? = nil)
     case basalProgram(schedule: BasalSchedule)
     case tempBasal(unitsPerHour: Double, duration: TimeInterval, isHighTemp: Bool, automatic: Bool)
     
@@ -23,12 +23,14 @@ enum StartProgram: RawRepresentable {
     
     var rawValue: RawValue {
         switch self {
-        case .bolus(let volume, let automatic):
-            return [
+        case .bolus(let volume, let automatic, let bolusReference):
+            var raw: RawValue = [
                 "programType": StartProgramType.bolus.rawValue,
                 "volume": volume,
                 "automatic": automatic
             ]
+            raw["bolusReference"] = bolusReference?.uuidString
+            return raw
         case .basalProgram(let schedule):
             return [
                 "programType": StartProgramType.basalProgram.rawValue,
@@ -58,7 +60,7 @@ enum StartProgram: RawRepresentable {
             {
                 return nil
             }
-            self = .bolus(volume: volume, automatic: automatic)
+            self = .bolus(volume: volume, automatic: automatic, bolusReference: (rawValue["bolusReference"] as? String).flatMap { UUID(uuidString: $0) })
         case .basalProgram:
             guard let rawSchedule = rawValue["schedule"] as? BasalSchedule.RawValue,
                   let schedule = BasalSchedule(rawValue: rawSchedule) else
@@ -80,8 +82,8 @@ enum StartProgram: RawRepresentable {
     
     static func == (lhs: StartProgram, rhs: StartProgram) -> Bool {
         switch(lhs, rhs) {
-        case (.bolus(let lhsVolume, let lhsAutomatic), .bolus(let rhsVolume, let rhsAutomatic)):
-            return lhsVolume == rhsVolume && lhsAutomatic == rhsAutomatic
+        case (.bolus(let lhsVolume, let lhsAutomatic, let lhsBolusReference), .bolus(let rhsVolume, let rhsAutomatic, let rhsBolusReference)):
+            return lhsVolume == rhsVolume && lhsAutomatic == rhsAutomatic && lhsBolusReference == rhsBolusReference
         case (.basalProgram(let lhsSchedule), .basalProgram(let rhsSchedule)):
             return lhsSchedule == rhsSchedule
         case (.tempBasal(let lhsUnitsPerHour, let lhsDuration, let lhsIsHighTemp, let lhsAutomatic), .tempBasal(let rhsUnitsPerHour, let rhsDuration, let rhsIsHighTemp, let rhsAutomatic)):
diff --git a/OmnipodKit/OmnipodCommon/UnfinalizedDose.swift b/OmnipodKit/OmnipodCommon/UnfinalizedDose.swift
index dc31da6..8e179a5 100644
--- a/OmnipodKit/OmnipodCommon/UnfinalizedDose.swift
+++ b/OmnipodKit/OmnipodCommon/UnfinalizedDose.swift
@@ -67,6 +67,7 @@ public struct UnfinalizedDose: RawRepresentable, Equatable, CustomStringConverti
     var isHighTemp: Bool =
         false // Track this for situations where cancelling temp basal is unacknowledged, and recovery fails, and we have to assume the most possible delivery
     var insulinType: InsulinType?
+    var bolusReference: UUID? // Opaque, caller-supplied reference echoed back on the resulting DoseEntry; not interpreted by the pump
 
     var finishTime: Date? {
         get {
@@ -110,7 +111,8 @@ public struct UnfinalizedDose: RawRepresentable, Equatable, CustomStringConverti
         startTime: Date,
         scheduledCertainty: ScheduledCertainty,
         insulinType: InsulinType,
-        automatic: Bool = false
+        automatic: Bool = false,
+        bolusReference: UUID? = nil
     ) {
         doseType = .bolus
         units = bolusAmount
@@ -120,6 +122,7 @@ public struct UnfinalizedDose: RawRepresentable, Equatable, CustomStringConverti
         scheduledUnits = nil
         self.automatic = automatic
         self.insulinType = insulinType
+        self.bolusReference = bolusReference
     }
 
     init(
@@ -324,6 +327,8 @@ public struct UnfinalizedDose: RawRepresentable, Equatable, CustomStringConverti
         if let rawInsulinType = rawValue["insulinType"] as? InsulinType.RawValue {
             insulinType = InsulinType(rawValue: rawInsulinType)
         }
+
+        bolusReference = (rawValue["bolusReference"] as? String).flatMap { UUID(uuidString: $0) }
     }
 
     public var rawValue: RawValue {
@@ -340,6 +345,7 @@ public struct UnfinalizedDose: RawRepresentable, Equatable, CustomStringConverti
         rawValue["scheduledTempRate"] = scheduledTempRate
         rawValue["duration"] = duration
         rawValue["insulinType"] = insulinType?.rawValue
+        rawValue["bolusReference"] = bolusReference?.uuidString
 
         return rawValue
     }
@@ -377,7 +383,8 @@ extension DoseEntry {
                 deliveredUnits: dose.finalizedUnits,
                 insulinType: dose.insulinType,
                 automatic: dose.automatic,
-                isMutable: dose.isMutable()
+                isMutable: dose.isMutable(),
+                bolusReference: dose.bolusReference
             )
         case .tempBasal:
             self = DoseEntry(
@@ -406,13 +413,14 @@ extension StartProgram {
         insulinType: InsulinType
     ) -> UnfinalizedDose? {
         switch self {
-        case let .bolus(volume: volume, automatic: automatic):
+        case let .bolus(volume: volume, automatic: automatic, bolusReference: bolusReference):
             return UnfinalizedDose(
                 bolusAmount: volume,
                 startTime: programDate,
                 scheduledCertainty: certainty,
                 insulinType: insulinType,
-                automatic: automatic
+                automatic: automatic,
+                bolusReference: bolusReference
             )
         case let .tempBasal(unitsPerHour: rate, duration: duration, isHighTemp, automatic):
             return UnfinalizedDose(
diff --git a/OmnipodKit/PumpManager/OmniPumpManager.swift b/OmnipodKit/PumpManager/OmniPumpManager.swift
index 42d846f..f3a6ccf 100644
--- a/OmnipodKit/PumpManager/OmniPumpManager.swift
+++ b/OmnipodKit/PumpManager/OmniPumpManager.swift
@@ -2488,6 +2488,10 @@ extension OmniPumpManager: PumpManager {
     // MARK: - Programming Delivery
 
     public func enactBolus(units: Double, activationType: BolusActivationType, completion: @escaping (PumpManagerError?) -> Void) {
+        enactBolus(units: units, activationType: activationType, bolusReference: nil, completion: completion)
+    }
+
+    public func enactBolus(units: Double, activationType: BolusActivationType, bolusReference: UUID?, completion: @escaping (PumpManagerError?) -> Void) {
         guard self.hasActivePod else {
             completion(.configuration(OmniPumpManagerError.noPodPaired))
             return
@@ -2552,7 +2556,7 @@ extension OmniPumpManager: PumpManager {
             //      in 63 minutes if bolus had not completed by then.
             let bolusWasAutomaticIndicator: TimeInterval = activationType.isAutomatic ? TimeInterval(minutes: 0x3F) : 0
 
-            let result = session.bolus(units: enactUnits, automatic: activationType.isAutomatic, acknowledgementBeep: acknowledgementBeep, completionBeep: completionBeep, programReminderInterval: bolusWasAutomaticIndicator)
+            let result = session.bolus(units: enactUnits, automatic: activationType.isAutomatic, acknowledgementBeep: acknowledgementBeep, completionBeep: completionBeep, programReminderInterval: bolusWasAutomaticIndicator, bolusReference: bolusReference)
 
             switch result {
             case .success:
diff --git a/OmnipodKit/PumpManager/PodCommsSession.swift b/OmnipodKit/PumpManager/PodCommsSession.swift
index 3b93281..971f0cd 100644
--- a/OmnipodKit/PumpManager/PodCommsSession.swift
+++ b/OmnipodKit/PumpManager/PodCommsSession.swift
@@ -666,7 +666,7 @@ class PodCommsSession: MessageTransportDelegate {
         case unacknowledged(error: PodCommsError)
     }
 
-    func bolus(units: Double, automatic: Bool = false, acknowledgementBeep: Bool = false, completionBeep: Bool = false, programReminderInterval: TimeInterval = 0, extendedUnits: Double = 0.0, extendedDuration: TimeInterval = 0) -> DeliveryCommandResult {
+    func bolus(units: Double, automatic: Bool = false, acknowledgementBeep: Bool = false, completionBeep: Bool = false, programReminderInterval: TimeInterval = 0, extendedUnits: Double = 0.0, extendedDuration: TimeInterval = 0, bolusReference: UUID? = nil) -> DeliveryCommandResult {
 
         if podState.unacknowledgedCommand != nil {
             do {
@@ -710,10 +710,10 @@ class PodCommsSession: MessageTransportDelegate {
 
         let bolusExtraCommand = BolusExtraCommand(units: units, timeBetweenPulses: timeBetweenPulses, extendedUnits: extendedUnits, extendedDuration: extendedDuration, acknowledgementBeep: acknowledgementBeep, completionBeep: completionBeep, programReminderInterval: programReminderInterval, bolusInfo: bolusInfo)
         do {
-            podState.unacknowledgedCommand = PendingCommand.program(.bolus(volume: units, automatic: automatic), transport.messageNumber, currentDate)
+            podState.unacknowledgedCommand = PendingCommand.program(.bolus(volume: units, automatic: automatic, bolusReference: bolusReference), transport.messageNumber, currentDate)
             let statusResponse: StatusResponse = try send([bolusScheduleCommand, bolusExtraCommand])
             podState.unacknowledgedCommand = nil
-            podState.unfinalizedBolus = UnfinalizedDose(bolusAmount: units, startTime: currentDate, scheduledCertainty: .certain, insulinType: podState.insulinType, automatic: automatic)
+            podState.unfinalizedBolus = UnfinalizedDose(bolusAmount: units, startTime: currentDate, scheduledCertainty: .certain, insulinType: podState.insulinType, automatic: automatic, bolusReference: bolusReference)
             podState.updateFromStatusResponse(statusResponse, at: currentDate)
             return DeliveryCommandResult.success(statusResponse: statusResponse)
         } catch PodCommsError.unacknowledgedMessage(let seq, let error) {