´It was narrated that Safwan bin Umayyah said:` "The plague, abdominal illness, drowning and dying in childbirth are martyrdom." (One of the narrators) said: Abu 'Uthman narrated this to us several times, and on one occasion he attributed it to the Prophet.
Explanation & Benefits
Hafiz Muhammad Ameen
This type of painful death is similar to a death by killing; therefore, it has also been associated with martyrdom (shahadah) and will be considered as attaining the rank of a martyr (shaheed). However, the remaining rulings of martyrdom will not apply to it, such as burying in the same blood-stained clothes and not giving the ritual bath (ghusl), etc.
Source: Sunan Nasa'i: Translation and Benefits by Shaykh Hafiz Muhammad Amin Hafizullah, Page: 2056