# Repeat Pattern (2.8.1 - 1.1.0) - HL7 v2.8.1 Vocabulary v0.1.0

* [**Table of Contents**](toc.md)
* [**Artifacts Summary**](artifacts.md)
* **Repeat Pattern (2.8.1 - 1.1.0)**

## CodeSystem: Repeat Pattern (2.8.1 - 1.1.0) (Experimental) 

| | |
| :--- | :--- |
| *Official URL*:http://terminology.hl7.org/v2plusvocab/CodeSystem/repeatPattern | *Version*:1.1.0 |
| Active as of 2026-01-27 | *Computable Name*:RepeatPattern |
| *Other Identifiers:*OID:2.16.840.1.113883.18.205 | |
| **Copyright/Legal**: HL7 Inc., 2026 | |

 
Code system of concepts used to specify the interval between repeated services. Used in HL7 Version 2.x messaging in the RI datatype and RPT segment. 

 This Code system is referenced in the content logical definition of the following value sets: 

* [Hl7VSrepeatPattern](ValueSet-hl7VSrepeatPattern.md)



## Resource Content

```json
{
  "resourceType" : "CodeSystem",
  "id" : "repeatPattern",
  "extension" : [
    {
      "url" : "http://terminology.hl7.org/v2plusvocab/StructureDefinition/codesystem-v2versionCreated",
      "valueString" : "2.8.1"
    },
    {
      "url" : "http://terminology.hl7.org/v2plusvocab/StructureDefinition/codesystem-versionHistory",
      "valueString" : "generate correct history somehow"
    },
    {
      "url" : "http://terminology.hl7.org/v2plusvocab/StructureDefinition/codesystem-tableNo",
      "valueString" : "0335"
    }
  ],
  "url" : "http://terminology.hl7.org/v2plusvocab/CodeSystem/repeatPattern",
  "identifier" : [
    {
      "system" : "urn:ietf:rfc:3986",
      "value" : "urn:oid:2.16.840.1.113883.18.205"
    }
  ],
  "version" : "1.1.0",
  "name" : "RepeatPattern",
  "title" : "Repeat Pattern (2.8.1 - 1.1.0)",
  "status" : "active",
  "experimental" : true,
  "date" : "2026-01-27T19:45:38+00:00",
  "publisher" : "HL7/FO",
  "contact" : [
    {
      "name" : "HL7/FO",
      "telecom" : [
        {
          "system" : "url",
          "value" : "http://www.hl7.org"
        }
      ]
    }
  ],
  "description" : "Code system of concepts used to specify the interval between repeated services.  Used in HL7 Version 2.x messaging in the RI datatype and RPT segment.",
  "copyright" : "HL7 Inc., 2026",
  "caseSensitive" : true,
  "compositional" : true,
  "content" : "complete",
  "property" : [
    {
      "code" : "versionIntroduced",
      "uri" : "http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#versionIntroduced",
      "description" : "version when was this code introduced",
      "type" : "string"
    },
    {
      "code" : "versionDeprecated",
      "uri" : "http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#versionDeprecated",
      "description" : "version when was this code deprecated",
      "type" : "string"
    },
    {
      "code" : "status",
      "uri" : "http://hl7.org/fhir/concept-properties#status",
      "description" : "A code that indicates the status of the concept. Typical values are active, experimental, deprecated, and retired",
      "type" : "code"
    },
    {
      "code" : "comment",
      "uri" : "http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#comment",
      "description" : "A string that provides additional detail pertinent to the use or understanding of the concept",
      "type" : "string"
    },
    {
      "code" : "usage",
      "uri" : "http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#usage",
      "description" : "usage notes for this code",
      "type" : "string"
    },
    {
      "code" : "modified",
      "uri" : "http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#modified",
      "description" : "date of last modification",
      "type" : "dateTime"
    }
  ],
  "concept" : [
    {
      "code" : "A",
      "display" : "Ante (before)",
      "definition" : "Ante (before)",
      "property" : [
        {
          "code" : "versionIntroduced",
          "valueString" : "2.4"
        }
      ]
    },
    {
      "code" : "BID",
      "display" : "twice a day at institution-specified times",
      "definition" : "twice a day at institution-specified times",
      "property" : [
        {
          "code" : "usage",
          "valueString" : "(e.g., 9AM-4PM)"
        },
        {
          "code" : "versionIntroduced",
          "valueString" : "2.4"
        }
      ]
    },
    {
      "code" : "C",
      "display" : "service is provided continuously between start time and stop time",
      "definition" : "service is provided continuously between start time and stop time",
      "property" : [
        {
          "code" : "versionIntroduced",
          "valueString" : "2.4"
        }
      ]
    },
    {
      "code" : "D",
      "display" : "Cibus Diurnus (lunch)",
      "definition" : "Cibus Diurnus (lunch)",
      "property" : [
        {
          "code" : "versionIntroduced",
          "valueString" : "2.4"
        }
      ]
    },
    {
      "code" : "I",
      "display" : "Inter",
      "definition" : "Inter",
      "property" : [
        {
          "code" : "usage",
          "valueString" : "(e.g., between this meal and the next, between dinner and sleep"
        },
        {
          "code" : "versionIntroduced",
          "valueString" : "2.4"
        }
      ]
    },
    {
      "code" : "M",
      "display" : "Cibus Matutinus (breakfast)",
      "definition" : "Cibus Matutinus (breakfast)",
      "property" : [
        {
          "code" : "versionIntroduced",
          "valueString" : "2.4"
        }
      ]
    },
    {
      "code" : "Meal Related Timings",
      "display" : "<timing>C (\"cum\")<meal>",
      "definition" : "<timing>C (\"cum\")<meal>",
      "property" : [
        {
          "code" : "versionIntroduced",
          "valueString" : "2.4"
        }
      ]
    },
    {
      "code" : "Once",
      "display" : "one time only.",
      "definition" : "one time only.",
      "property" : [
        {
          "code" : "usage",
          "valueString" : "This is also the default when this component is null."
        },
        {
          "code" : "versionIntroduced",
          "valueString" : "2.4"
        }
      ]
    },
    {
      "code" : "P",
      "display" : "Post (after)",
      "definition" : "Post (after)",
      "property" : [
        {
          "code" : "versionIntroduced",
          "valueString" : "2.4"
        }
      ]
    },
    {
      "code" : "PRN",
      "display" : "given as needed",
      "definition" : "given as needed",
      "property" : [
        {
          "code" : "versionIntroduced",
          "valueString" : "2.4"
        }
      ]
    },
    {
      "code" : "PRNxxx",
      "display" : "where xxx is some frequency code",
      "definition" : "where xxx is some frequency code",
      "property" : [
        {
          "code" : "usage",
          "valueString" : "(e.g., PRNQ6H); given as needed over the frequency period."
        },
        {
          "code" : "versionIntroduced",
          "valueString" : "2.4"
        }
      ]
    },
    {
      "code" : "Q<integer>D",
      "display" : "every <integer> days",
      "definition" : "every <integer> days",
      "property" : [
        {
          "code" : "versionIntroduced",
          "valueString" : "2.4"
        }
      ]
    },
    {
      "code" : "Q<integer>H",
      "display" : "every <integer> hours",
      "definition" : "every <integer> hours",
      "property" : [
        {
          "code" : "versionIntroduced",
          "valueString" : "2.4"
        }
      ]
    },
    {
      "code" : "Q<integer>J<day#>",
      "display" : "repeats on a particular day of the week",
      "definition" : "repeats on a particular day of the week",
      "property" : [
        {
          "code" : "usage",
          "valueString" : "From the French jour (day). If <integer> is missing, the repeat rate is assumed to be 1. Day numbers are counted from 1=Monday to 7=Sunday. So Q2J2 means every second Tuesday; Q1J6 means every Saturday."
        },
        {
          "code" : "versionIntroduced",
          "valueString" : "2.4"
        }
      ]
    },
    {
      "code" : "Q<integer>L",
      "display" : "every <integer> months (Lunar cycle)",
      "definition" : "every <integer> months (Lunar cycle)",
      "property" : [
        {
          "code" : "versionIntroduced",
          "valueString" : "2.4"
        }
      ]
    },
    {
      "code" : "Q<integer>M",
      "display" : "every <integer> minutes",
      "definition" : "every <integer> minutes",
      "property" : [
        {
          "code" : "versionIntroduced",
          "valueString" : "2.4"
        }
      ]
    },
    {
      "code" : "Q<integer>S",
      "display" : "every <integer> seconds",
      "definition" : "every <integer> seconds",
      "property" : [
        {
          "code" : "versionIntroduced",
          "valueString" : "2.4"
        }
      ]
    },
    {
      "code" : "Q<integer>W",
      "display" : "every <integer> weeks",
      "definition" : "every <integer> weeks",
      "property" : [
        {
          "code" : "versionIntroduced",
          "valueString" : "2.4"
        }
      ]
    },
    {
      "code" : "QAM",
      "display" : "in the morning at institution-specified time",
      "definition" : "in the morning at institution-specified time",
      "property" : [
        {
          "code" : "versionIntroduced",
          "valueString" : "2.4"
        }
      ]
    },
    {
      "code" : "QHS",
      "display" : "every day before the hour of sleep",
      "definition" : "every day before the hour of sleep",
      "property" : [
        {
          "code" : "versionIntroduced",
          "valueString" : "2.4"
        }
      ]
    },
    {
      "code" : "QID",
      "display" : "four times a day at institution-specified times",
      "definition" : "four times a day at institution-specified times",
      "property" : [
        {
          "code" : "usage",
          "valueString" : "(e.g., 9AM-11AM-4PM-9PM)"
        },
        {
          "code" : "versionIntroduced",
          "valueString" : "2.4"
        }
      ]
    },
    {
      "code" : "QOD",
      "display" : "every other day",
      "definition" : "every other day",
      "property" : [
        {
          "code" : "usage",
          "valueString" : "(same as Q2D)"
        },
        {
          "code" : "versionIntroduced",
          "valueString" : "2.4"
        }
      ]
    },
    {
      "code" : "QPM",
      "display" : "in the evening at institution-specified time",
      "definition" : "in the evening at institution-specified time",
      "property" : [
        {
          "code" : "versionIntroduced",
          "valueString" : "2.4"
        }
      ]
    },
    {
      "code" : "QSHIFT",
      "display" : "during each of three eight-hour shifts at institution-specified times",
      "definition" : "during each of three eight-hour shifts at institution-specified times",
      "property" : [
        {
          "code" : "versionIntroduced",
          "valueString" : "2.4"
        }
      ]
    },
    {
      "code" : "TID",
      "display" : "three times a day at institution-specified times",
      "definition" : "three times a day at institution-specified times",
      "property" : [
        {
          "code" : "usage",
          "valueString" : "(e.g., 9AM-4PM-9PM)"
        },
        {
          "code" : "versionIntroduced",
          "valueString" : "2.4"
        }
      ]
    },
    {
      "code" : "U <spec>",
      "display" : "for future use, where <spec> is an interval specification as defined by the UNIX cron specification.",
      "definition" : "for future use, where <spec> is an interval specification as defined by the UNIX cron specification.",
      "property" : [
        {
          "code" : "versionIntroduced",
          "valueString" : "2.4"
        }
      ]
    },
    {
      "code" : "V",
      "display" : "Cibus Vespertinus (dinner)",
      "definition" : "Cibus Vespertinus (dinner)",
      "property" : [
        {
          "code" : "versionIntroduced",
          "valueString" : "2.4"
        }
      ]
    },
    {
      "code" : "xID",
      "display" : "\"X\" times per day at institution-specified times, where X is a numeral 5 or greater.",
      "definition" : "\"X\" times per day at institution-specified times, where X is a numeral 5 or greater.",
      "property" : [
        {
          "code" : "usage",
          "valueString" : "(e.g., 5ID=five times per day; 8ID=8 times per day)"
        },
        {
          "code" : "versionIntroduced",
          "valueString" : "2.4"
        }
      ]
    }
  ]
}

```
