Below is from the DFARS and DFARS PGI. Typically a DD Form 2579 is not required for an order under a single award IDIQ contract. However, check with your local small business professional.
DFARS 219.201 General policy.
(c) For the defense agencies, the director of the Office of Small Business Programs must be appointed by, be responsible to, and report directly to the director or deputy director of the defense agency.
(8) The responsibility for assigning small business technical advisors is delegated to the head of the contracting activity.
(10) Contracting activity small business specialists perform this function by—
(A) Reviewing and making recommendations for all acquisitions (including orders placed against Federal Supply Schedule contracts) over $10,000, except those under the simplified acquisition threshold that are totally set aside for small business concerns in accordance with FAR 19.502-2. Follow the procedures at PGI 219.201(c)(10) (DFARS/PGI view) regarding such reviews.
(B) Making the review before issuance of the solicitation or contract modification and documenting it on DD Form 2579, Small Business Coordination Record (see PGI 253.219-70 for instructions on completing the form); and
DFARS PGI 219.201 General policy. (c)(10)(1) Agencies are not precluded from requiring that actions over $10,000, but under $150,000, that are totally set aside for small business be reviewed by the small business specialist. One example of when an agency may choose to require this review is when the agency determines that such a review is necessary to assist contracting officers in identifying opportunities for other small business set-aside programs (e.g., HUBZone, service-disabled veteran-owned, small disadvantaged business, women-owned small business) in order to meet small business goals.