/// <summary>
        /// Parse MedicationAdministration
        /// </summary>
        public static Hl7.Fhir.Model.MedicationAdministration ParseMedicationAdministration(IFhirReader reader, ErrorList errors, Hl7.Fhir.Model.MedicationAdministration existingInstance = null)
        {
            Hl7.Fhir.Model.MedicationAdministration result = existingInstance != null ? existingInstance : new Hl7.Fhir.Model.MedicationAdministration();
            string currentElementName = reader.CurrentElementName;

            reader.EnterElement();

            while (reader.HasMoreElements())
            {
                var atName = reader.CurrentElementName;
                // Parse element extension
                if (atName == "extension")
                {
                    result.Extension = new List <Hl7.Fhir.Model.Extension>();
                    reader.EnterArray();

                    while (ParserUtils.IsAtArrayElement(reader, "extension"))
                    {
                        result.Extension.Add(ExtensionParser.ParseExtension(reader, errors));
                    }

                    reader.LeaveArray();
                }

                // Parse element language
                else if (atName == "language")
                {
                    result.LanguageElement = CodeParser.ParseCode(reader, errors);
                }

                // Parse element text
                else if (atName == "text")
                {
                    result.Text = NarrativeParser.ParseNarrative(reader, errors);
                }

                // Parse element contained
                else if (atName == "contained")
                {
                    result.Contained = new List <Hl7.Fhir.Model.Resource>();
                    reader.EnterArray();

                    while (ParserUtils.IsAtArrayElement(reader, "contained"))
                    {
                        result.Contained.Add(ParserUtils.ParseContainedResource(reader, errors));
                    }

                    reader.LeaveArray();
                }

                // Parse element _id
                else if (atName == "_id")
                {
                    result.LocalIdElement = Id.Parse(reader.ReadPrimitiveContents(typeof(Id)));
                }

                // Parse element identifier
                else if (atName == "identifier")
                {
                    result.Identifier = new List <Hl7.Fhir.Model.Identifier>();
                    reader.EnterArray();

                    while (ParserUtils.IsAtArrayElement(reader, "identifier"))
                    {
                        result.Identifier.Add(IdentifierParser.ParseIdentifier(reader, errors));
                    }

                    reader.LeaveArray();
                }

                // Parse element status
                else if (atName == "status")
                {
                    result.StatusElement = CodeParser.ParseCode <Hl7.Fhir.Model.MedicationAdministration.MedicationAdministrationStatus>(reader, errors);
                }

                // Parse element patient
                else if (atName == "patient")
                {
                    result.Patient = ResourceReferenceParser.ParseResourceReference(reader, errors);
                }

                // Parse element practitioner
                else if (atName == "practitioner")
                {
                    result.Practitioner = ResourceReferenceParser.ParseResourceReference(reader, errors);
                }

                // Parse element encounter
                else if (atName == "encounter")
                {
                    result.Encounter = ResourceReferenceParser.ParseResourceReference(reader, errors);
                }

                // Parse element prescription
                else if (atName == "prescription")
                {
                    result.Prescription = ResourceReferenceParser.ParseResourceReference(reader, errors);
                }

                // Parse element wasNotGiven
                else if (atName == "wasNotGiven")
                {
                    result.WasNotGivenElement = FhirBooleanParser.ParseFhirBoolean(reader, errors);
                }

                // Parse element reasonNotGiven
                else if (atName == "reasonNotGiven")
                {
                    result.ReasonNotGiven = new List <Hl7.Fhir.Model.CodeableConcept>();
                    reader.EnterArray();

                    while (ParserUtils.IsAtArrayElement(reader, "reasonNotGiven"))
                    {
                        result.ReasonNotGiven.Add(CodeableConceptParser.ParseCodeableConcept(reader, errors));
                    }

                    reader.LeaveArray();
                }

                // Parse element whenGiven
                else if (atName == "whenGiven")
                {
                    result.WhenGiven = PeriodParser.ParsePeriod(reader, errors);
                }

                // Parse element medication
                else if (atName == "medication")
                {
                    result.Medication = ResourceReferenceParser.ParseResourceReference(reader, errors);
                }

                // Parse element administrationDevice
                else if (atName == "administrationDevice")
                {
                    result.AdministrationDevice = new List <Hl7.Fhir.Model.ResourceReference>();
                    reader.EnterArray();

                    while (ParserUtils.IsAtArrayElement(reader, "administrationDevice"))
                    {
                        result.AdministrationDevice.Add(ResourceReferenceParser.ParseResourceReference(reader, errors));
                    }

                    reader.LeaveArray();
                }

                // Parse element dosage
                else if (atName == "dosage")
                {
                    result.Dosage = new List <Hl7.Fhir.Model.MedicationAdministration.MedicationAdministrationDosageComponent>();
                    reader.EnterArray();

                    while (ParserUtils.IsAtArrayElement(reader, "dosage"))
                    {
                        result.Dosage.Add(MedicationAdministrationParser.ParseMedicationAdministrationDosageComponent(reader, errors));
                    }

                    reader.LeaveArray();
                }

                else
                {
                    errors.Add(String.Format("Encountered unknown element {0} while parsing {1}", reader.CurrentElementName, currentElementName), reader);
                    reader.SkipSubElementsFor(currentElementName);
                    result = null;
                }
            }

            reader.LeaveElement();
            return(result);
        }