Peripheral Neuropathy: Given the patient's symptoms of intermittent numbness and pain localized to specific digits of the foot, peripheral neuropathy is a strong consideration. The fact that it occurs both at rest and with activity (like walking) and is intermittent could suggest a neuropathic cause. The patient's medication regimen, including Adderall and quetiapine, could potentially contribute to neuropathic symptoms, although this is less common.

Morton's Neuroma: This condition involves a thickening of the tissue around the nerves leading to the toes, often causing pain, numbness, or tingling, especially between the toes. It could explain the symptoms in digits 2-3, especially if the patient has a history of wearing tight or high-heeled shoes.
Tarsal Tunnel Syndrome: Similar to carpal tunnel syndrome but affecting the foot, this condition involves compression of the posterior tibial nerve as it travels through the tarsal tunnel on the inner side of the ankle. Symptoms can include numbness, tingling, and pain in the foot, particularly affecting the toes.
Radicular Pain/Radiculopathy: Although less likely given the specific digit involvement, radiculopathy from a lumbar disc issue could potentially cause pain and numbness in a foot. However, the pattern is usually more widespread and follows a dermatomal distribution.

Diabetic Neuropathy: Even though the patient's age and provided medications do not strongly suggest diabetes, it's crucial to rule out diabetic neuropathy due to its potential for significant morbidity if left untreated. Diabetic neuropathy can present with a variety of symptoms, including pain, numbness, and tingling in the feet.
Vitamin B12 Deficiency: A deficiency in vitamin B12 can cause neuropathic symptoms, including numbness and pain in the feet. Given the potential for serious neurological consequences if left untreated, it's essential to consider and rule out this condition.
Multiple Sclerosis: Although less common, multiple sclerosis (MS) can present with a wide range of neurological symptoms, including numbness and pain in specific areas of the body. MS would be an unusual cause for such localized symptoms without other systemic or neurological findings, but it cannot be entirely ruled out without further investigation.

Amyloidosis: A group of diseases characterized by the accumulation of amyloid (an abnormal protein) in various tissues of the body, which can lead to peripheral neuropathy among other symptoms. This would be an uncommon cause of the patient's symptoms but could be considered if other diagnoses are ruled out and the patient has other systemic symptoms suggestive of amyloidosis.
Charcot-Marie-Tooth Disease: A group of inherited disorders that affect the peripheral nerves, leading to numbness, muscle weakness, and other symptoms, primarily in the feet and legs. This diagnosis would be more likely if there was a family history or if the symptoms were more widespread and progressive.