# Deductible and Out-of-Pocket Accumulators from Claims Data

Flexpa's financial data guide describes claim-based deductible and out-of-pocket totals. For a selected benefit period, sum deductible amounts for the deductible total; sum deductible, copay, and coinsurance amounts for the out-of-pocket total. Treat these as calculations from available claims, not a guarantee of the plan's current balance.

How it works: Available claims -> Confirmed benefit period -> Claim-based totals. The financial guide calculates totals from available claims; its 12-month benefit period is an assumption.

## The math

| Accumulator | Sum of |
|---|---|
| Deductible | Deductible amounts |
| Out-of-pocket | Copay plus coinsurance plus deductible |

## Find the benefit year

The guide uses Coverage.period.start and adds one year as a simplifying assumption. It notes that some plans have shorter coverage periods. Confirm the applicable benefit period rather than treating every coverage start as a guaranteed annual reset.

### Get coverage

```bash
curl https://api.flexpa.com/fhir/Coverage \
  -H "Authorization: Bearer $ACCESS_TOKEN"
```

## Good to know

- Only covered services count toward accumulators.
- Flexpa normalizes adjudication codes in ExplanationOfBenefit resources for supported payers, so the sums use one set of codes.

## Questions

**Can I calculate deductible progress from claims data?** Flexpa's financial data guide calculates a claim-based deductible total by summing deductible amounts in ExplanationOfBenefit records for the benefit period. Confirm the period and available claims before presenting the result as an estimate of plan progress.

**How do I find the benefit year?** Flexpa's financial data example starts with Coverage.period.start and assumes a 12-month period. The guide notes that this assumption does not fit every plan. Confirm the actual benefit period for the coverage you are analyzing.

## More

- [Accumulators (financial data guide)](https://www.flexpa.com/docs/guides/financial#accumulators)
- [Benefits utilization data](https://www.flexpa.com/benefits-utilization-data)
- [Deductibles and out-of-pocket maximums (blog)](https://www.flexpa.com/blog/healthcare-math-deductibles-and-out-of-pocket-maximums)
- [Financial data guide](https://www.flexpa.com/docs/guides/financial)

Last updated 2026-11-11.