---
title: "URSA-CORE-903: Document Patient Not in Patients Natural Object"
slug: "ursa-core-903-document-patient-not-in-patients-natural-object-1"
updated: 2026-11-04T20:13:15Z
published: 2026-11-04T20:13:15Z
canonical: "docs.ursahealth.com/ursa-core-903-document-patient-not-in-patients-natural-object-1"
---

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# URSA-CORE-903: Document Patient Not in Patients Natural Object

## Measure Description

Among distinct Patient ID values appearing on at least one patient document, the percentage without a corresponding record in the Patients natural object. (Any non-zero result indicates that additional source data files containing Patient ID values should be incorporated into the Patients natural object.)

## Metadata

- **Measure Identifier**: URSA-CORE-903
- **Measure Type**: Rate Measure
- **Temporal Structure**: Event
- **Component Class**: Normal-Form
- **Case Field**: Patient ID
- **Observation Field**: Patient ID
- **Target Direction**: Down

## Denominator Description

One per distinct Patient ID value appearing on at least one patient document.

## Numerator Description

One per qualifying denominator observation with a Patient ID not found in the Patients natural object.

## Published Fields

- **Data Model Keys**
  - Patient ID -- The internal database identifier (used, e.g., for joins and primary keys) for the patient. This value is typically mastered, i.e., all records for the same patient, regardless of the source data system from which that record originated, should have the same Patient ID value. (Note that while the mastered Patient ID value might resemble a local identifier used in one of the upstream data sources, this does not indicate any special priority of that source system in determining the characteristics of the patient.) (See also [URSA-CORE] Patient)
  - Earliest Document ID
  - Earliest Document Plan ID
  - Earliest Document Payor ID
  - Earliest Document Source ID
- **Date Fields**
  - Earliest Document Effective Date
  - Segment Start Date -- The start date of the reporting segment. (See also [URSA-CORE] Reporting Segment)
  - Segment End Date -- The end date of the reporting segment. (See also [URSA-CORE] Reporting Segment)
- **Measure Fields**
  - Denominator