Previous Page TOC Index Next Page

2.8.10 CX - extended composite ID with check digit

Components: <ID (ST)> ^ <check digit (ST)> ^ <code identifying the check digit scheme employed (ID)> ^ < assigning authority (HD) )> ^ <identifier type code (IS)> ^ < assigning facility (HD)

Example:

|1234567^4^M11^ADT01^MR^University Hospital|

2.8.10.1 ID (ST)

Defined as in the CK data type (see Section 2.8.5, "CK - composite ID with check digit") except that an ST data type is allowed instead of an NM data type.

2.8.10.2 Check digit (ST)

Defined as in the CK data type (see Section 2.8.5, "CK - composite ID with check digit" except that an ST data type is allowed instead of an NM data type. The check digit in this data type is not an add-on produced by the message processor. It is the check digit that is part of the identifying number used in the sending application. If the sending application does not include a self-generated check digit in the identifying number, this component should be valued null.

2.8.10.3 Code identifying the check digit scheme employed (ID)

Defined as in the CK data type (see Section 2.8.5, "CK - composite ID with check digit". Refer to HL7 table 0061- Check digit scheme for valid values.

Note: The check digit and code identifying check digit scheme are null if ID is alphanumeric.

2.8.10.4 Assigning authority (HD)

The assigning authority is a unique name of the system that creates the data. It is an HD data type. It is equivalent to the application ID of the placer or filler order number (see Chapter 4). Assigning authorities are unique across a given HL7 implementation.

2.8.10.5 Identifier type code (IS)

A code corresponds to the type of identifier. In some cases, this code may be used as a qualifier to the "Assigning authority" component. Refer to user-defined table 0203 - Identifier type for suggested values.

User-defined table 0203 - Identifier type

Value

Description

AM

American Express

AN

Account Number

BR

Birth Registry Number

DI

Diner’s Club Card

DL

Driver’s License Number

DN

Doctor Number

DS

Discover Card

EI

Employee Number

EN

Employer Number

GI

Guarantor Internal Identifier

GN

Guarantor External Identifier

MS

MasterCard

MA

Medicaid Number

MC

Medicare Number

MR

Medical Record Number

PI

Patient Internal Identifier

PN

Person Number

PT

Patient External Identifier

RR

Railroad Retirement Number

SS

Social Security Number

UPIN

Medicare/HCFA’s Universal Physician Identification Numbers

VS

VISA

VN

Visit Number

XX

Organization Identifier

2.8.10.6 Assigning facility (HD)

Subcomponents: <namespace ID (IS)> & < universal ID (ST)> & <universal ID type (ID)>

Definition: the place or location identifier where the identifier was first assigned to the patient. This component is not an inherent part of the identifier but rather part of the history of the identifier: as part of this data type, its existence is a convenience for certain intercommunicating systems.

Previous Page TOC Index Next Page