After the 1979 Iranian Revolution, Mohammad Heidari left the country for Italy and a few years later moved to Los Angeles, where he continued his activities as a soloist and songwriter. Some of his nostalgic songs such as "Zahr-e Jodai" and "Bahar Bahar" (both performed by Hayedeh) became popular in the Persian community. Heyidari also has written the melody of other Persian hit songs such as Bia Benevisim and Sobhet Bekheir Azizam.

Mohammad Heyidari died from cancer in a hospital in Los Angeles on 23 August 2016, aged 79.^{[citation needed]}

• Akbarzadeh, P. "Persian Musicians" (Vol. 2), Roshanak Publications, Tehran, 2003.
• محمد حیدری آهنگ‌ساز 'وقتی میای صدای پات' درگذشت BBC Persian
• خزان آهنگساز "بهار بهار"؛ محمد حیدری درگذشت, VOA
• محمد حیدری؛ پیشگام در تلفیق موسیقی سنتی و پاپ BBC Persian