Merge regions in bedgraph file

I have a bedgraph file with the chromosome, start and end point, and the coverage:

CM000994.3      10167710        10167711        95

CM000994.3      10167718        10167720        95

I want to merge regions that are close together.

With a bed file I could use something like this:

bedtools merge -d 1000 -i file.bed >file.merged.bed

Is there a similar thing for bedgraph files? I could convert to bed and then merge, but then I loose the information about coverage.