These are the folks that need to be screened for Vitamin D deficiency according to the Endocrine Society.  Keep in mind they stated that “20-100% of the population may be deficient” in the same article.

• African-American and Hispanic children and adults
• Pregnant and lactating women
• Older adults with history of falls
• Older adults with history of nontraumatic fractures
• Obese children and adults (BMI>30 kg/m²)
• Use of medications
  • Antiseizure medications
  • Glucocorticoids
  • AIDS medications
  • Antifungals, e.g. ketoconazole
  • Cholestyramine
• Malabsorption syndromes
  • Cystic fibrosis
  • Inflammatory bowel disease
  • Crohn’s disease
  • Bariatric surgery
  • Radiation enteritis
• Rickets
• Osteomalacia
• Chronic kidney disease
• Hepatic failure
• Hyperparathyroidism
• Granuloma-forming disorders
  • Sarcoidosis
  • Tuberculosis
  • Histoplasmosis
  • Coccidiomycosis
  • Berylliosis
• Some Lymphomas

Holick MF, Binkley NC, Bischoff-Ferrari HA, et al. Evaluation, treatment, and prevention of vitamin D deficiency: an endocrine society clinical practice guideline. J Clin Endocrinol Metab. 2011 Jul;96(7):1911-30. Epub 2011 Jun 6.PMID:21646368