Word.ws English Dictionary

coinsurance

coinsurance noun: the joint assumption of risk between the insurer and the insured party.

Noun

coinsurance (countable and uncountable, plural coinsurances)

  1. (US, especially) The joint assumption of risk between the insurer and the insured party.
  2. (US, especially, metonymically) The amount paid by the insured in accordance with this risk sharing.
    • For Part B-covered services, you usually pay 20% of the Medicare-approved amount after you meet your deductible. This is called your coinsurance.2021, Medicare & You 2022, Baltimore, MD: U.S. DEPARTMENT OF HEALTH AND HUMAN SERVICES : Centers for Medicare & Medicaid Services, page 6
  3. (international) The joint assumption of risk between multiple insurers.

Forms of coinsurance

pluralcoinsurances
alternative formco-insurance

Origin of coinsurance

From co- + insurance.

Questions about coinsurance

What does coinsurance mean?
Coinsurance means the joint assumption of risk between the insurer and the insured party.
What part of speech is coinsurance?
Coinsurance is a noun.
What is the plural of coinsurance?
The plural of coinsurance is coinsurances.

Words near coinsurance in the dictionary

  1. coinstantiated
  2. coinstantiates
  3. coinstantiating
  4. coinstantiation
  5. coinstantiations
  6. coinsurance
  7. coinsurances
  8. coinsure
  9. coinsured
  10. coinsureds
  11. coinsurer

Source and license

Adapted from Wiktionary: coinsurance (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Pronunciation audio from Wikimedia Commons, each file under its own free license: LL-Q1860 (eng)-Wodencafe-coinsurance.wav.

Cite this entry: “coinsurance.” Word.ws, https://word.ws/coinsurance. Based on Wiktionary, CC BY-SA 4.0.