Bosh, 30, is receiving treatment at a hospital in South Florida. He checked himself in to the hospital Thursday after not feeling well for several days. The Heat said in a statement that "Chris is OK and his prognosis is good."
Bosh, who is in the first year of a five-year, $118-million contract with the Heat, was averaging 21.1 points and 7.0 rebounds per game this season. The 10-time NBA All-Star has eclipsed the 30-point mark six times this season for the Heat (22-30).
Bosh's diagnosis comes days after former NBA player Jerome Kersey died when a blood clot traveled from his left calf to his lungs. He was 52. Last month, Brooklyn's Mirza Teletovic was diagnosed with blood clots in his lungs and is expected to miss the remainder of the season.
The absence of Bosh comes as a tough blow for the Heat, who entered Saturday sitting in seventh place in the Eastern Conference.