CBI had put the inflation rate for the preceding month of Farvardin, which ended on April 20, at 9.2%.
The overall CPI (using the Iranian year to March 2017 as the base year) stood at 117.5 in Ordibehesht, indicating a 1.6% increase compared with the previous month.
The index registered a year-on-year increase of 9.7% compared with the similar month of last year, according to Financial Tribune.
The CBI report came after the Statistical Center of Iran put Ordibehesht inflation at 8%.