It will vary depending on which country you're asking about, but in the USA around 25% are agnostic or atheist.
Answer
As admitting to being an atheist is a hot button issue in the USA physicians are circumspect in discussing their beilfs. Studies by the US Journal of Internal Medicineindicate that:
- A high percentage of the physicians answered the surrvey (63%).
- 55% of physicians say their religious beliefs influence their practice of medicine
- Physicians are less likely to say they try to carry their religious beliefs over into all other dealings in life (58% vs 73%) than other Americans
- Physicians are more likely to consider themselves spiritual but not religious (20% vs 9%)
- Physicians are more likely to cope with major problems in life without relying on God or rleligious precepts (61% vs 29%).