# WAC 182-502A-0601: WAC 182-502A-0601. Extrapolation

> Washington · Regulations · In force

URL: https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_182_502A_0601

## Section

- **Citation:** WAC 182-502A-0601
- **Heading:** WAC 182-502A-0601. Extrapolation
- **Jurisdiction:** Washington
- **Kind:** Regulations
- **Status:** In force
- **Text as of:** August 14, 2026
- **Source:** Compiled text
- **Location:** Washington Administrative Code / Title 182 / Chapter 182-502A / Section 182-502A-0601

## Text

(1) To determine an improper payment from a sample, the medicaid agency may extrapolate to the universe from which the sample was drawn:
(a) If the audit identifies a sustained high level of payment error involving the provider; or
(b) When the agency has documented educational intervention to the provider and the education has failed to correct the provider's level of payment error.
(2) If during the course of the audit, an entity adjusts or rebills a claim or encounter that is part of the audit sample or universe, the original claim or encounter amount remains in the audit sample or universe.
(3) When the agency uses the results of an audit sample to extrapolate the amount to be recovered, the agency provides the entity with the following information:
(a) The sample size.
(b) The method used to select the sample.
(c) The universe from which the sample was drawn.
(d) Any formulas or calculations used to determine the amount of the improper payment.

## Nearby sections

- [WAC 182-502A-0101 WAC 182-502A-0101. Purpose](https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_182_502A_0101.md)
- [WAC 182-502A-0201 WAC 182-502A-0201. Definitions](https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_182_502A_0201.md)
- [WAC 182-502A-0301 WAC 182-502A-0301. Authority to conduct program integrity activities](https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_182_502A_0301.md)
- [WAC 182-502A-0401 WAC 182-502A-0401. Program integrity activities](https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_182_502A_0401.md)
- [WAC 182-502A-0501 WAC 182-502A-0501. Entity self-audits](https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_182_502A_0501.md)
- [WAC 182-502A-0601 WAC 182-502A-0601. Extrapolation](https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_182_502A_0601.md)
- [WAC 182-502A-0701 WAC 182-502A-0701. Agency outcomes](https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_182_502A_0701.md)
- [WAC 182-502A-0801 WAC 182-502A-0801. Dispute resolution process](https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_182_502A_0801.md)
- [WAC 182-502A-0901 WAC 182-502A-0901. Administrative hearing (formal appeal) right](https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_182_502A_0901.md)
- [WAC 182-502A-1001 WAC 182-502A-1001. Metrics](https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_182_502A_1001.md)
- [WAC 182-502A-1101 WAC 182-502A-1101. Managed care organizations](https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_182_502A_1101.md)

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Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_182_502A_0601. Check the current official text before relying on it. Not legal advice.