---
title: 'MedicationRequest (FHIR R4)'
description: 'FHIR R4 MedicationRequest resource.'
nav: 'API / R4 / MedicationRequest'
order: 80
version: v1
fhir: r4
source: generated
updated: '2026-09-23'
---
# MedicationRequest (FHIR R4)
FHIR R4 MedicationRequest resource.
> This reference is generated from the canonical Huli Public API OpenAPI specification and the server's FHIR R4 CapabilityStatement — do not edit it directly.
## FHIR R4 Specification
Official spec: [MedicationRequest — HL7 FHIR R4](https://hl7.org/fhir/R4/medicationrequest.html)
## Supported Interactions
- **read** — Read a single resource by ID (`GET /fhir/R4/{Resource}/{id}`)
- **search-type** — Search resources with query parameters (`GET /fhir/R4/{Resource}?...`)
- **create** — Create a new resource (`POST /fhir/R4/{Resource}`)
- **update** — Update an existing resource (`PUT /fhir/R4/{Resource}/{id}`)
## Scopes
Scopes are shared across FHIR releases — the same `system/MedicationRequest.*` scope grants MedicationRequest access on both `/fhir/R4` and `/fhir/R5`.
- — see [scope reference](/v1/scopes#system-medicationrequest-rs)
- — see [scope reference](/v1/scopes#system-medicationrequest-cru)
## Search Parameters
| Parameter | Type | Notes |
|-----------|------|-------|
| `patient` | reference | Resource reference — supply the UUID of the referenced resource. |
| `encounter` | reference | Resource reference — supply the UUID of the referenced resource. |
| `_count` | number | Integer. For `_count`: default 20, max 100. |
| `_cursor` | string | Case-insensitive partial match. |
## Endpoints
### Read MedicationRequest
Retrieve a single MedicationRequest resource by its ID.
**Required scope:**
#### Code Samples
:::CodeGroup
```bash {label="cURL"}
TOKEN=$(curl -s -X POST https://api.huli.ai/auth/token \
-d "grant_type=client_credentials" \
-d "client_assertion_type=urn:ietf:params:oauth:client-assertion-type:jwt-bearer" \
-d "client_assertion=${CLIENT_ASSERTION}" \
-d "scope=system/MedicationRequest.rs" \
| jq -r .access_token)
curl -X GET https://api.huli.ai/fhir/R4/MedicationRequest/${RESOURCE_ID} \
-H "Authorization: Bearer ${TOKEN}"
```
```typescript {label="TypeScript"}
const token = process.env.HULI_ACCESS_TOKEN ?? "";
const response = await fetch(
`https://api.huli.ai/fhir/R4/MedicationRequest/${id}`,
{
method: "GET",
headers: {
"Authorization": `Bearer ${token}`,
},
}
);
if (!response.ok) throw new Error(`HTTP ${String(response.status)}`);
const data: unknown = await response.json();
```
```python {label="Python"}
import os
import requests
token = os.environ["HULI_ACCESS_TOKEN"]
headers = {"Authorization": f"Bearer {token}"}
resp = requests.get(
f"https://api.huli.ai/fhir/R4/MedicationRequest/{resource_id}",
headers=headers,
)
resp.raise_for_status()
print(resp.json())
```
```java {label="Java"}
import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
public class getMedicationRequestExample {
public static void main(String[] args) throws Exception {
String token = System.getenv("HULI_ACCESS_TOKEN");
String resourceId = "RESOURCE_ID";
HttpClient client = HttpClient.newHttpClient();
HttpRequest request = HttpRequest.newBuilder()
.uri(URI.create("https://api.huli.ai/fhir/R4/MedicationRequest/" + resourceId))
.header("Authorization", "Bearer " + token)
.header("Accept", "application/fhir+json")
.method("GET", HttpRequest.BodyPublishers.noBody())
.build();
HttpResponse response =
client.send(request, HttpResponse.BodyHandlers.ofString());
System.out.println("status: " + response.statusCode());
System.out.println(response.body());
}
}
```
```go {label="Go"}
import (
"fmt"
"net/http"
"os"
)
func getMedicationRequestExample() {
token := os.Getenv("HULI_ACCESS_TOKEN")
req, _ := http.NewRequest("GET", "https://api.huli.ai/fhir/R4/MedicationRequest/"+resourceID+"", nil)
req.Header.Set("Authorization", "Bearer "+token)
resp, err := http.DefaultClient.Do(req)
if err != nil {
fmt.Println("error:", err)
return
}
defer resp.Body.Close()
fmt.Println("status:", resp.Status)
}
```
:::
#### Errors
| Code | Status | Description |
|------|--------|-------------|
| [HPB-00106](/v1/errors#hpb-00106) | 401 | Authentication failed |
| [HPB-00104](/v1/errors#hpb-00104) | 403 | Insufficient scope |
| [HPB-00102](/v1/errors#hpb-00102) | 404 | Resource not found |
| [HPB-00105](/v1/errors#hpb-00105) | 429 | Rate limit exceeded |
---
### Update MedicationRequest
Update an existing MedicationRequest. The update is a read-then-merge: the
FHIR-owned fields (status, medication code/system/display, dosage,
dispense, reason, notes) overlay the stored row, while app-only fields not
represented in FHIR (prescription warnings, validity, sort order, and the
draft-prescription grouping) are preserved. A MedicationRequest whose
parent prescription is already signed or cancelled cannot be modified
(`409 Conflict`). The `subject` is immutable — a body subject that differs
from the stored patient is rejected (`422`).
Supports optimistic concurrency: supply the `If-Match` header with the
`ETag` from the last read to make the update conditional. A stale
validator is rejected with a `409` version conflict — the same HPB-00103
shape as the signed-prescription conflict; the `VersionConflict` response
documents the version-conflict cause. The response carries `ETag` +
`Last-Modified` for the new version.
**Required scope:**
#### Request Body
#### Request Example
```json
{
"resourceType": "MedicationRequest",
"status": "active",
"intent": "order",
"medicationCodeableConcept": {
"text": "Amoxicillin 500mg"
},
"subject": {
"reference": "Patient/550e8400-e29b-41d4-a716-446655440001"
},
"dosageInstruction": [
{
"text": "1 tablet every 12 hours"
}
]
}
```
#### Code Samples
:::CodeGroup
```bash {label="cURL"}
TOKEN=$(curl -s -X POST https://api.huli.ai/auth/token \
-d "grant_type=client_credentials" \
-d "client_assertion_type=urn:ietf:params:oauth:client-assertion-type:jwt-bearer" \
-d "client_assertion=${CLIENT_ASSERTION}" \
-d "scope=system/MedicationRequest.cru" \
| jq -r .access_token)
curl -X PUT https://api.huli.ai/fhir/R4/MedicationRequest/${RESOURCE_ID} \
-H "Authorization: Bearer ${TOKEN}" \
-H "Content-Type: application/fhir+json" \
-d @resource.json
```
```typescript {label="TypeScript"}
const token = process.env.HULI_ACCESS_TOKEN ?? "";
const response = await fetch(
`https://api.huli.ai/fhir/R4/MedicationRequest/${id}`,
{
method: "PUT",
headers: {
"Authorization": `Bearer ${token}`,
"Content-Type": "application/fhir+json",
},
body: JSON.stringify(payload),
}
);
if (!response.ok) throw new Error(`HTTP ${String(response.status)}`);
const data: unknown = await response.json();
```
```python {label="Python"}
import os
import requests
token = os.environ["HULI_ACCESS_TOKEN"]
headers = {"Authorization": f"Bearer {token}", "Content-Type": "application/fhir+json"}
resp = requests.put(
f"https://api.huli.ai/fhir/R4/MedicationRequest/{resource_id}",
headers=headers,
json=payload,
)
resp.raise_for_status()
print(resp.json())
```
```java {label="Java"}
import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
public class updateMedicationRequestExample {
public static void main(String[] args) throws Exception {
String token = System.getenv("HULI_ACCESS_TOKEN");
String resourceId = "RESOURCE_ID";
String payload = "{}"; // your serialized FHIR resource
HttpClient client = HttpClient.newHttpClient();
HttpRequest request = HttpRequest.newBuilder()
.uri(URI.create("https://api.huli.ai/fhir/R4/MedicationRequest/" + resourceId))
.header("Authorization", "Bearer " + token)
.header("Accept", "application/fhir+json")
.header("Content-Type", "application/fhir+json")
.method("PUT", HttpRequest.BodyPublishers.ofString(payload))
.build();
HttpResponse response =
client.send(request, HttpResponse.BodyHandlers.ofString());
System.out.println("status: " + response.statusCode());
System.out.println(response.body());
}
}
```
```go {label="Go"}
import (
"fmt"
"net/http"
"os"
)
func updateMedicationRequestExample() {
token := os.Getenv("HULI_ACCESS_TOKEN")
req, _ := http.NewRequest("PUT", "https://api.huli.ai/fhir/R4/MedicationRequest/"+resourceID+"", body)
req.Header.Set("Authorization", "Bearer "+token)
req.Header.Set("Content-Type", "application/fhir+json")
// set req.Body to your serialized resource
resp, err := http.DefaultClient.Do(req)
if err != nil {
fmt.Println("error:", err)
return
}
defer resp.Body.Close()
fmt.Println("status:", resp.Status)
}
```
:::
#### Errors
| Code | Status | Description |
|------|--------|-------------|
| [HPB-00101](/v1/errors#hpb-00101) | 400 | Validation error |
| [HPB-00106](/v1/errors#hpb-00106) | 401 | Authentication failed |
| [HPB-00104](/v1/errors#hpb-00104) | 403 | Insufficient scope |
| [HPB-00102](/v1/errors#hpb-00102) | 404 | Resource not found |
| [HPB-00103](/v1/errors#hpb-00103) | 409 | Version conflict |
| [HPB-00101](/v1/errors#hpb-00101) | 422 | Unprocessable entity |
| [HPB-00105](/v1/errors#hpb-00105) | 429 | Rate limit exceeded |
---
### Search MedicationRequests
Search for MedicationRequest resources. Requires a `patient` or `encounter` parameter.
Paginated with `_count` and a numeric offset `_cursor`.
**Required scope:**
#### Query Parameters
#### Code Samples
:::CodeGroup
```bash {label="cURL"}
TOKEN=$(curl -s -X POST https://api.huli.ai/auth/token \
-d "grant_type=client_credentials" \
-d "client_assertion_type=urn:ietf:params:oauth:client-assertion-type:jwt-bearer" \
-d "client_assertion=${CLIENT_ASSERTION}" \
-d "scope=system/MedicationRequest.rs" \
| jq -r .access_token)
curl -X GET https://api.huli.ai/fhir/R4/MedicationRequest \
-H "Authorization: Bearer ${TOKEN}"
```
```typescript {label="TypeScript"}
const token = process.env.HULI_ACCESS_TOKEN ?? "";
const response = await fetch(
`https://api.huli.ai/fhir/R4/MedicationRequest`,
{
method: "GET",
headers: {
"Authorization": `Bearer ${token}`,
},
}
);
if (!response.ok) throw new Error(`HTTP ${String(response.status)}`);
const data: unknown = await response.json();
```
```python {label="Python"}
import os
import requests
token = os.environ["HULI_ACCESS_TOKEN"]
headers = {"Authorization": f"Bearer {token}"}
resp = requests.get(
f"https://api.huli.ai/fhir/R4/MedicationRequest",
headers=headers,
)
resp.raise_for_status()
print(resp.json())
```
```java {label="Java"}
import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
public class searchMedicationRequestsExample {
public static void main(String[] args) throws Exception {
String token = System.getenv("HULI_ACCESS_TOKEN");
HttpClient client = HttpClient.newHttpClient();
HttpRequest request = HttpRequest.newBuilder()
.uri(URI.create("https://api.huli.ai/fhir/R4/MedicationRequest"))
.header("Authorization", "Bearer " + token)
.header("Accept", "application/fhir+json")
.method("GET", HttpRequest.BodyPublishers.noBody())
.build();
HttpResponse response =
client.send(request, HttpResponse.BodyHandlers.ofString());
System.out.println("status: " + response.statusCode());
System.out.println(response.body());
}
}
```
```go {label="Go"}
import (
"fmt"
"net/http"
"os"
)
func searchMedicationRequestsExample() {
token := os.Getenv("HULI_ACCESS_TOKEN")
req, _ := http.NewRequest("GET", "https://api.huli.ai/fhir/R4/MedicationRequest", nil)
req.Header.Set("Authorization", "Bearer "+token)
resp, err := http.DefaultClient.Do(req)
if err != nil {
fmt.Println("error:", err)
return
}
defer resp.Body.Close()
fmt.Println("status:", resp.Status)
}
```
:::
#### Errors
| Code | Status | Description |
|------|--------|-------------|
| [HPB-00101](/v1/errors#hpb-00101) | 400 | Validation error |
| [HPB-00106](/v1/errors#hpb-00106) | 401 | Authentication failed |
| [HPB-00104](/v1/errors#hpb-00104) | 403 | Insufficient scope |
| [HPB-00105](/v1/errors#hpb-00105) | 429 | Rate limit exceeded |
---
### Create MedicationRequest
Create a new MedicationRequest. The server assigns the resource ID and auto-links the
medication to a draft prescription.
**Required scope:**
#### Request Body
#### Request Example
```json
{
"resourceType": "MedicationRequest",
"status": "active",
"intent": "order",
"medicationCodeableConcept": {
"text": "Amoxicillin 500mg"
},
"subject": {
"reference": "Patient/550e8400-e29b-41d4-a716-446655440001"
},
"dosageInstruction": [
{
"text": "1 tablet every 8 hours"
}
]
}
```
#### Code Samples
:::CodeGroup
```bash {label="cURL"}
TOKEN=$(curl -s -X POST https://api.huli.ai/auth/token \
-d "grant_type=client_credentials" \
-d "client_assertion_type=urn:ietf:params:oauth:client-assertion-type:jwt-bearer" \
-d "client_assertion=${CLIENT_ASSERTION}" \
-d "scope=system/MedicationRequest.c" \
| jq -r .access_token)
curl -X POST https://api.huli.ai/fhir/R4/MedicationRequest \
-H "Authorization: Bearer ${TOKEN}" \
-H "Content-Type: application/fhir+json" \
-d @medicationrequest.json
```
```typescript {label="TypeScript"}
const token = process.env.HULI_ACCESS_TOKEN ?? "";
const response = await fetch(
`https://api.huli.ai/fhir/R4/MedicationRequest`,
{
method: "POST",
headers: {
"Authorization": `Bearer ${token}`,
"Content-Type": "application/fhir+json",
},
body: JSON.stringify(payload),
}
);
if (!response.ok) throw new Error(`HTTP ${String(response.status)}`);
const data: unknown = await response.json();
```
```python {label="Python"}
import os
import requests
token = os.environ["HULI_ACCESS_TOKEN"]
headers = {"Authorization": f"Bearer {token}", "Content-Type": "application/fhir+json"}
resp = requests.post(
f"https://api.huli.ai/fhir/R4/MedicationRequest",
headers=headers,
json=payload,
)
resp.raise_for_status()
print(resp.json())
```
```java {label="Java"}
import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
public class createMedicationRequestExample {
public static void main(String[] args) throws Exception {
String token = System.getenv("HULI_ACCESS_TOKEN");
String payload = "{}"; // your serialized FHIR resource
HttpClient client = HttpClient.newHttpClient();
HttpRequest request = HttpRequest.newBuilder()
.uri(URI.create("https://api.huli.ai/fhir/R4/MedicationRequest"))
.header("Authorization", "Bearer " + token)
.header("Accept", "application/fhir+json")
.header("Content-Type", "application/fhir+json")
.method("POST", HttpRequest.BodyPublishers.ofString(payload))
.build();
HttpResponse response =
client.send(request, HttpResponse.BodyHandlers.ofString());
System.out.println("status: " + response.statusCode());
System.out.println(response.body());
}
}
```
```go {label="Go"}
import (
"fmt"
"net/http"
"os"
)
func createMedicationRequestExample() {
token := os.Getenv("HULI_ACCESS_TOKEN")
req, _ := http.NewRequest("POST", "https://api.huli.ai/fhir/R4/MedicationRequest", body)
req.Header.Set("Authorization", "Bearer "+token)
req.Header.Set("Content-Type", "application/fhir+json")
// set req.Body to your serialized resource
resp, err := http.DefaultClient.Do(req)
if err != nil {
fmt.Println("error:", err)
return
}
defer resp.Body.Close()
fmt.Println("status:", resp.Status)
}
```
:::
#### Errors
| Code | Status | Description |
|------|--------|-------------|
| [HPB-00101](/v1/errors#hpb-00101) | 400 | Validation error |
| [HPB-00106](/v1/errors#hpb-00106) | 401 | Authentication failed |
| [HPB-00104](/v1/errors#hpb-00104) | 403 | Insufficient scope |
| [HPB-00101](/v1/errors#hpb-00101) | 422 | Unprocessable entity |
| [HPB-00105](/v1/errors#hpb-00105) | 429 | Rate limit exceeded |
---