findRelatedNDCs

APIs

RxNorm API

Information returned: NDCs related by NDC product, RxNorm concept, or RxNorm drug product
Service domain: https://rxnav.nlm.nih.gov
HTTP request: GET /REST/relatedndc.xml?ndc=NDC&relation=R&ndcstatus=S

Description

Get NDCs that are related by concept, drug, or NDC product.

Concept: NDCs associated with the same RxNorm concept as the subject NDC. For example, if NDC 0781-5384-92 is mapped to atorvastatin 40 MG Oral Tablet, then NDCs mapped to this concept will be returned.
Drug: NDCs associated with any drug concept (SBD, SCD, BPCK, or GPCK) that is related to the RxNorm concept of the subject NDC. For example, if NDC 0781-5384-92 is mapped to atorvastatin 40 MG Oral Tablet, then the NDCs mapped to this concept or to the related branded product Lipitor 40 MG Oral Tablet will be returned.
Product: NDCs having the same initial two-segment code as the subject NDC. Use this to find packagings of a manufacturer's product. For example, return all NDCs for product code 0071-0157.

The ndcstatus parameter can filter the results, returning only NDCs of specified status.

NDC status values:

ACTIVE: The NDC is recognized by RxNorm as active and is associated with an active concept. The RxCUI associated with the NDC is contained in the returned history data.
OBSOLETE: The NDC previously existed in RxNorm, but is no longer recognized as active. The history data will indicate the time periods and RxCUI(s) associated with the NDC.
ALIEN: The NDC is or was contained only in a source vocabulary other than RxNorm. This status means that the NDC has never been active in RxNorm.
UNKNOWN: The NDC is unknown or invalid. This means that the NDC has never been active in RxNorm, is not in a source vocabulary other than RxNorm, and no history data is available.

Scope

Active: concepts in the current RxNorm data set that have an atom with SAB=RXNORM and SUPPRESS=N

Parameters

Parameter	Location	Use	Description	Default
format	Path	Optional	Notation for results One of: .xml Get results in XML .json Get results in JSON	.xml
ndc	Query	Required	NDC (CMS 11-digit, or three-segment 5-3-2, 5-4-1, or 4-4-2, or two-segment 4-4, 5-3, or 5-4; no asterisks)
relation	Query	Required	Group of NDCs to retrieve One of: concept NDCs of the same RxNorm concept product NDCs of the same NDC product drug NDCs of the same RxNorm active drug
ndcstatus	Query	Optional	Status filter for NDCs to retrieve One or more of: active Linked by RXNORM to an active concept obsolete Previously linked by RXNORM alien Found only in a non-RXNORM vocabulary ALL Any status (Space-separated list.)	active

All query parameters are case-insensitive.

Note that HTTP requires that query parameters be "URL encoded". For instance, a "space-separated list" will, in practice, usually appear to use either a plus sign (+) or %20 as the separator. For full information on URL encoding, please refer to IETF RFC 3986, "Uniform Resource Identifier".

Output structure

Results are available as either XML or JSON.

The XML result has the root element rxnormdata. It is described in the XML Schema for the RxNorm API; the relevant element structure is summarized below. Elements that would be empty might be left out.
The JSON result is an object {...}, analogous to the content of the XML rxnormdata. Fields that might occur multiple times in the XML are expressed as an array. Fields that would be empty might be null or left out. Numbers are expressed as strings.

Both XML and JSON results follow the same outline:

rxnormdata

Root element in XML, or anonymous object in JSON

ndcInfoList

ndcInfo (array)

ndc11: National Drug Code (NDC) in CMS 11-digit format

status: NDC status

rxcui: RxNorm identifier

conceptName: A name for the concept

conceptStatus: RxNorm concept status

tty: RxNorm Term type

Example: Active NDCs that are packagings of a given NDC two-segment code

XML: https://rxnav.nlm.nih.gov/REST/relatedndc?relation=product&ndc=0069-3060

JSON: https://rxnav.nlm.nih.gov/REST/relatedndc.json?relation=product&ndc=0069-3060

An XML result is shown below.

<rxnormdata>
    <ndcInfoList>
        <ndcInfo>
            <ndc11>00069306030</ndc11>
            <status>ACTIVE</status>
            <rxcui>212446</rxcui>
            <conceptName>azithromycin 250 MG Oral Tablet [Zithromax]</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SBD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>00069306075</ndc11>
            <status>ACTIVE</status>
            <rxcui>750149</rxcui>
            <conceptName>{6 (azithromycin 250 MG Oral Tablet [Zithromax]) } Pack [Z-PAK]</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>BPCK</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>00069306086</ndc11>
            <status>ACTIVE</status>
            <rxcui>212446</rxcui>
            <conceptName>azithromycin 250 MG Oral Tablet [Zithromax]</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SBD</tty>
        </ndcInfo>
    </ndcInfoList>
</rxnormdata>

Example: NDCs, active or not, related to a drug

XML: https://rxnav.nlm.nih.gov/REST/relatedndc?ndc=0015-7403-20&relation=drug&ndcstatus=all

JSON: https://rxnav.nlm.nih.gov/REST/relatedndc.json?ndc=0015-7403-20&relation=drug&ndcstatus=all

An XML result is shown below.

<rxnormdata>
    <ndcInfoList>
        <ndcInfo>
            <ndc11>00003291810</ndc11>
            <status>ALIEN</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>00003291820</ndc11>
            <status>ALIEN</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>00015740318</ndc11>
            <status>ALIEN</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>00015740320</ndc11>
            <status>OBSOLETE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>00015740399</ndc11>
            <status>OBSOLETE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>00404981799</ndc11>
            <status>OBSOLETE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>00409268301</ndc11>
            <status>OBSOLETE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>00409268311</ndc11>
            <status>OBSOLETE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>00409371801</ndc11>
            <status>ACTIVE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>00409371810</ndc11>
            <status>ACTIVE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>00615012101</ndc11>
            <status>ALIEN</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>00641225241</ndc11>
            <status>ALIEN</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>00781340778</ndc11>
            <status>ACTIVE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>00781340795</ndc11>
            <status>ACTIVE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>00781925078</ndc11>
            <status>ACTIVE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>00781925095</ndc11>
            <status>ACTIVE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>00781940778</ndc11>
            <status>ACTIVE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>00781940795</ndc11>
            <status>ACTIVE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>10515014600</ndc11>
            <status>OBSOLETE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>25021013510</ndc11>
            <status>ACTIVE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>36000007110</ndc11>
            <status>OBSOLETE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>39822040005</ndc11>
            <status>ALIEN</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>43858011278</ndc11>
            <status>OBSOLETE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>43858011295</ndc11>
            <status>OBSOLETE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>44567010110</ndc11>
            <status>ACTIVE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>52584007110</ndc11>
            <status>OBSOLETE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>52584013510</ndc11>
            <status>OBSOLETE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>52584035050</ndc11>
            <status>OBSOLETE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>54569153000</ndc11>
            <status>OBSOLETE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>54868404700</ndc11>
            <status>OBSOLETE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>55150011210</ndc11>
            <status>ACTIVE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>63323038810</ndc11>
            <status>OBSOLETE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>63323070800</ndc11>
            <status>ACTIVE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>65219001601</ndc11>
            <status>ACTIVE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>65219001610</ndc11>
            <status>ACTIVE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>66794022102</ndc11>
            <status>ACTIVE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>66794022141</ndc11>
            <status>ACTIVE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>67457035010</ndc11>
            <status>ACTIVE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>67457035050</ndc11>
            <status>ACTIVE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>67850002400</ndc11>
            <status>ACTIVE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>67850002410</ndc11>
            <status>ACTIVE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>70594008501</ndc11>
            <status>ACTIVE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>70594008502</ndc11>
            <status>ACTIVE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>70860011315</ndc11>
            <status>ACTIVE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>70860011341</ndc11>
            <status>ACTIVE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>72603022101</ndc11>
            <status>ACTIVE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>72603022110</ndc11>
            <status>ACTIVE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>76126002710</ndc11>
            <status>OBSOLETE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
        <ndcInfo>
            <ndc11>82449090310</ndc11>
            <status>ACTIVE</status>
            <rxcui>1721474</rxcui>
            <conceptName>ampicillin 500 MG Injection</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
    </ndcInfoList>
</rxnormdata>

Example: Active NDCs related to the same RxNorm concept

XML: https://rxnav.nlm.nih.gov/REST/relatedndc?ndc=72887064812&relation=concept

JSON: https://rxnav.nlm.nih.gov/REST/relatedndc.json?ndc=72887064812&relation=concept

An XML result is shown below.

<rxnormdata>
    <ndcInfoList>
        <ndcInfo>
            <ndc11>72887064812</ndc11>
            <status>ACTIVE</status>
            <rxcui>2105822</rxcui>
            <conceptName>acetaminophen 60 MG/ML / oxycodone hydrochloride 2 MG/ML Oral Solution</conceptName>
            <conceptStatus>ACTIVE</conceptStatus>
            <tty>SCD</tty>
        </ndcInfo>
    </ndcInfoList>
</rxnormdata>