In R3A, R3X, R3-1, R4A, R4B or R4-1 Districts, excluding lower density growth management areas, the Board of Standards and Appeals may permit ambulatory diagnostic or treatment health care facilities listed in Use Group 4, limited in each case to a maximum of 10,000 square feet of floor area, provided that the Board finds that the amount of open area and its distribution on the zoning lot conform to standards appropriate to the character of the neighborhood.

The Board may prescribe appropriate conditions and safeguards to minimize adverse effects on the character of the surrounding area.