# Supported resource types and identifiers
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Resource matching supports seven FHIR R4 resource types. For each type, it matches on the following identifiers. Identifiers not listed here are not used for matching.

## Patient and RelatedPerson
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**Patient and RelatedPerson identifiers**  

| Identifier | Scope | 
| --- | --- | 
| Social Security Number (SSN) | Globally unique | 
| Medicare HIC | Globally unique | 
| Medicare MBI | Globally unique | 
| Driver's license | Scoped to the issuing state | 
| Medical record number (MRN) | Scoped to the issuing system | 
| Passport number | Scoped to the issuing country | 

## Practitioner and PractitionerRole
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**Practitioner and PractitionerRole identifiers**  

| Identifier | Scope | 
| --- | --- | 
| National Provider Identifier (NPI) | Globally unique | 
| Tax ID (EIN) | Globally unique | 
| DEA number | Globally unique | 
| NCSBN ID | Globally unique | 
| Medical license number | Scoped to the issuing state | 

## Organization
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**Organization identifiers**  

| Identifier | Scope | 
| --- | --- | 
| National Provider Identifier (NPI) | Globally unique | 
| Tax ID (EIN) | Globally unique | 
| CLIA number | Globally unique | 
| CMS Certification Number (CCN) | Globally unique | 
| Global Location Number (GLN) | Globally unique | 

## Location
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**Location identifiers**  

| Identifier | Scope | 
| --- | --- | 
| National Provider Identifier (NPI) | Globally unique | 
| Global Location Number (GLN) | Globally unique | 
| CMS Certification Number (CCN) | Globally unique | 

## Device
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**Device identifiers**  

| Identifier | Scope | 
| --- | --- | 
| Unique Device Identifier (UDI) | Globally unique | 
| Serial number | Scoped to the manufacturer |