diff --git a/models/operations.go b/models/operations.go
new file mode 100644
index 0000000..e8a26e1
--- /dev/null
+++ b/models/operations.go
@@ -0,0 +1,57 @@
+package models
+
+import "encoding/json"
+
+type Parameters struct {
+	ID            *string               `json:"id,omitempty"`
+	Meta          *FHIRMeta             `json:"meta,omitempty"`
+	ImplicitRules *string               `json:"implicitRules,omitempty"`
+	Language      *string               `json:"language,omitempty"`
+	Parameter     []ParametersParameter `json:"parameter,omitempty"`
+}
+type ParametersParameter struct {
+	ID                   *string               `json:"id,omitempty"`
+	Extension            []Extension           `json:"extension,omitempty"`
+	ModifierExtension    []Extension           `json:"modifierExtension,omitempty"`
+	Name                 string                `json:"name"`
+	ValueBase64Binary    *string               `json:"valueBase64Binary,omitempty"`
+	ValueBoolean         *bool                 `json:"valueBoolean,omitempty"`
+	ValueCanonical       *string               `json:"valueCanonical,omitempty"`
+	ValueCode            *string               `json:"valueCode,omitempty"`
+	ValueDate            *string               `json:"valueDate,omitempty"`
+	ValueDateTime        *string               `json:"valueDateTime,omitempty"`
+	ValueDecimal         *json.Number          `json:"valueDecimal,omitempty"`
+	ValueID              *string               `json:"valueId,omitempty"`
+	ValueInstant         *string               `json:"valueInstant,omitempty"`
+	ValueInteger         *int                  `json:"valueInteger,omitempty"`
+	ValueMarkdown        *string               `json:"valueMarkdown,omitempty"`
+	ValueOid             *string               `json:"valueOid,omitempty"`
+	ValuePositiveInt     *int                  `json:"valuePositiveInt,omitempty"`
+	ValueString          *string               `json:"valueString,omitempty"`
+	ValueTime            *string               `json:"valueTime,omitempty"`
+	ValueUnsignedInt     *int                  `json:"valueUnsignedInt,omitempty"`
+	ValueUrI             *string               `json:"valueUrI,omitempty"`
+	ValueUrL             *string               `json:"valueUrL,omitempty"`
+	ValueUUID            *string               `json:"valueUUID,omitempty"`
+	ValueAddress         *FHIRAddress          `json:"valueAddress,omitempty"`
+	ValueAge             *FHIRAge              `json:"valueAge,omitempty"`
+	ValueAnnotation      *FHIRAnnotation       `json:"valueAnnotation,omitempty"`
+	ValueAttachment      *FHIRAttachment       `json:"valueAttachment,omitempty"`
+	ValueCodeableConcept *FHIRCodeableConcept  `json:"valueCodeableConcept,omitempty"`
+	ValueCoding          *FHIRCoding           `json:"valueCoding,omitempty"`
+	ValueContactPoint    *FHIRContactPoint     `json:"valueContactPoint,omitempty"`
+	ValueDuration        *FHIRDuration         `json:"valueDuration,omitempty"`
+	ValueHumanName       *FHIRHumanName        `json:"valueHumanName,omitempty"`
+	ValueIdentifier      *FHIRIdentifier       `json:"valueIdentifier,omitempty"`
+	ValuePeriod          *FHIRPeriod           `json:"valuePeriod,omitempty"`
+	ValueQuantity        *FHIRQuantity         `json:"valueQuantity,omitempty"`
+	ValueRange           *FHIRRange            `json:"valueRange,omitempty"`
+	ValueRatio           *FHIRRatio            `json:"valueRatio,omitempty"`
+	ValueReference       *FHIRReference        `json:"valueReference,omitempty"`
+	ValueSampledData     *FHIRSampledData      `json:"valueSampledData,omitempty"`
+	ValueTiming          *FHIRTiming           `json:"valueTiming,omitempty"`
+	ValueExpression      *FHIRExpression       `json:"valueExpression,omitempty"`
+	ValueMeta            *FHIRMeta             `jsoson:"valueMeta,omitempty"`
+	Resource             json.RawMessage       `jsoon:"resource,omitempty"`
+	Part                 []ParametersParameter `json:"part,omitempty"`
+}
diff --git a/operations.go b/operations.go
index 627e06d..692d2bd 100644
--- a/operations.go
+++ b/operations.go
@@ -136,3 +136,15 @@ func (c *Client) GetEncounterEverything(ctx context.Context, encounterID string,
 
 	return &bundle, nil
 }
+
+// PatchFHIRResource updates an instance of a fhir resource.
+func (c *Client) PatchFHIRResource(ctx context.Context, resourceType string, resourceID string, payload []*models.Parameters, resource interface{}) error {
+	updatePath := fmt.Sprintf("%v/%v", resourceType, resourceID)
+
+	err := c.makeRequest(ctx, http.MethodPatch, updatePath, nil, payload, resource)
+	if err != nil {
+		return fmt.Errorf("unable to patch resource: %w", err)
+	}
+
+	return nil
+}