---
title: Get latest MCO
summary: Determine the worker's currently effective managed-care organization (MCO) location for a claim.
status: draft
owner: SAIF.Core documentation team
last_reviewed: 2026-09-24
library: SAIF.Data
reference_type: package
operation_id: OP-SD-05
trigger: Caller requests the latest MCO for a claim.
---

# Get latest MCO

Determine the worker's currently effective managed-care organization (MCO) location for a claim.

| Field | Value |
| --- | --- |
| **Operation ID** | OP-SD-05 |
| **Trigger** | Caller requests the latest MCO for a claim. |
| **Inputs** | Claim id |
| **Outputs** | `McoLocation` (possibly empty) |
| **Primary components** | `CCClaimApiService.GetLatestMco` |
| **Entry point** | `Data/SAIF.Data/Queries/Claims/CCClaimApiService.cs` |

## Steps

1. Call `IClaimDataApiClient.GetGuidewireClaimDataMCO(claimId)`.
   > **Origin**: This step delegates to [`ClaimDataApiClient.GetGuidewireClaimDataMCO`](../../saif-data-guidewire/api/SAIF.Data.Guidewire.Clients/ClaimDataApiClient.md), implemented in `SAIF.Data.Guidewire`, which issues a cached GET of `claims/{claimId}/mco` and returns the single current MCO for the claim.
3. Keep entries whose effective date is on or before today and whose expiration is today or later, or `DateTime.MinValue` ([SD-BR-012](../business-rules.md#sd-br-012-latest-mco-selection-precedence)).
4. Order by effective date, newest first, and take the first entry; upper-case the plan id. If none match, return an empty `McoLocation` ([SD-BR-012](../business-rules.md#sd-br-012-latest-mco-selection-precedence)).

## Process flow

The following diagram visualizes this operation's control flow.

```mermaid
flowchart TD
	Start([Caller requests the latest MCO for a claim.]) --> S1["`CCClaimApiService.GetLatestMco`"]
	S1 --> S2{"Rules satisfied?"}
	S2 -->|Yes| EndOk([Result returned])
	S2 -->|No| EndErr([Exception / empty result])
```

## Failure and edge-case behavior
- No matching entries: returns an empty `McoLocation` rather than null.

## Related documentation
- [Operations and processes](../operations-processes.md)
- [Business rules](../business-rules.md)
- [SQL catalog](../sql/index.md)
- [Database tables](../database-tables.md)


## Sources
- `Data/SAIF.Data/Queries/Claims/CCClaimApiService.cs`