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4.8.4 RXC - pharmacy/treatment component order segment

If the drug or treatment ordered with the RXO segment is a compound drug OR an IV solution, AND there is not a coded value for the Universal Service ID which specifies the components (base and all additives), then the components (the base and additives) are specified by two or more RXC segments. The policy of the pharmacy or treatment application on substitutions at the RXC level is identical to that for the RXO level.

Figure 4-15. RXC attributes

SEQ

LEN

DT

OPT

RP/#

TBL#

ITEM #

ELEMENT NAME

1

1

ID

R


0166

00313

RX Component Type

2

100

CE

R



00314

Component Code

3

20

NM

R



00315

Component Amount

4

60

CE

R



00316

Component Units

5

20

NM

O



01124

Component Strength

6

60

CE

O



01125

Component Strength Units

4.8.4.0 RXC field definitions

4.8.4.1 RX component type (ID) 00313

Definition: Following are the values for this field:

Table 0166 - RX component type

Value

Description

B

Base

A

Additive

For the non-IV case, the "B" value may still apply. For example, if a custom dermatologic salve is being prepared, the "B" item might be a standard base ointment into which other components are mixed.

The amount of the "base" specified in the "B" segment(s) is defined to be the quantity into which amounts specified in the "A" components are mixed. Thus the RXC segments as a group define the "recipe" for a particular amount (defined by the base segment(s)). The give amount, as defined in the RXO, does not need to correspond to this base amount. For example, the RXC segments may specify a recipe for a liter of a standard type of saline with 1 gram of a particular antimicrobial, while the give amount (from the RXO) may specify the administration of 2 liters of this IV-solution every 24 hours.

The amount specified in each "A" segment is defined to be the quantity to be added to the amount of the base as specified in its RXC segment.

If any "base" components are present then these should be transmitted first. The first "base" component in the transmission should be considered the "primary base" if such a distinction is necessary. Similarly, the first "additive" in the transmission should be considered the "primary additive" if such a distinction is necessary.

4.8.4.2 Component code (CE) 00314

Components: <identifier (ST)> ^ <text (ST)> ^ <name of coding system (ST)> ^ <alternate identifier (ST)> ^ <alternate text (ST)> ^ <name of alternate coding system (ST)>

Definition: This field is equivalent to OBR-4-universal service ID. It defines the base or component in the same manner as the give and dispense codes. As with the give and dispense codes, it may contain text only, code only, text + code, or text + code + units (implied or explicit). As with the give and dispense codes, if RXC-4-component units is present, this overrides the units implied by the code. If only text is present, the pharmacy or treatment application must include a manual review or reentering of the component drug or treatment.

4.8.4.3 Component amount (NM) 00315

Definition: This field identifies the amount of this component to be added to the specified amount of the base.

4.8.4.4 Component units (CE) 00316

Components: <identifier (ST)> ^ <text (ST)> ^ <name of coding system (ST)> ^ <alternate identifier (ST)> ^ <alternate text (ST)> ^ <name of alternate coding system (ST)>

Definition: This field identifies the units for the component amount. If present, this overrides the units implied by RXC-2-component code. This must be in simple units that reflect the actual quantity of the component being added. It does not include compound units.

4.8.4.5 Component strength (NM) 01124

Definition: Use when RXC-2-component code does not specify the strength. This is the numeric part of the strength, used in combination with RXC-6-component strength unit.

4.8.4.6 Component strength unit (CE) 01125

Components: <identifier (ST)> ^ <text (ST)> ^ <name of coding system (ST)> ^ <alternate identifier (ST)> ^ <alternate text (ST)> ^ <name of alternate coding system (ST)>

Definition: Use when RXC-2-component code does not specify the strength. This is the unit of the strength, used in combination with RXC-5-component strength.

Note: These units can be a "compound quantity"; i.e., the units may express a quantity per unit of time. For example, micrograms per hour (ug/h) is an acceptable value. These compound units are contained in the ISO+ table. See Chapter 7 for full definition of ISO+ units.

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