title: The transition from Medicaid fee-for-service to managed care among private practitioners in New York City: effect on immunization and screening rates.
abstract: OBJECTIVE
  This study examined the association between participation in Medicaid managed care and up-to-date coverage for childhood immunizations and screenings among private practice physicians serving New York City's poorest neighborhoods.
  
  
  METHODS
  A random sample of 2174 children 3-35 months of age was drawn from 60 physician practices in 1995, and a cross-sectional analysis was used to compare up-to-date status for immunizations, and lead and anemia screening tests, for children cared for by managed care and nonmanaged care physicians. In 1996, an independent sample of 2380 children from the same practices was used to compare up-to-date status for individual children enrolled in Medicaid managed care and children predominantly enrolled in traditional fee-for-service Medicaid. Information from physician interviews augmented chart review data. Chi-square analysis and logistic regression were used.
  
  
  RESULTS
  Physicians who participate in Medicaid managed care and those who do not had equal up-to-date coverage for immunizations (41.0 vs. 36.9%, p = .527), and lead (46.8 vs. 38.7%, p = .199) and anemia screening (63.2 vs. 56.5%, p = .272). Measures of the process of care were also similar for the two groups of physicians. Children themselves enrolled in Medicaid managed care appeared significantly more likely to be up-to-date than their nonmanaged care counterparts for immunizations (OR = 1.53, p = .027) and anemia screening (OR = 2.95, p = .000).
  
  
  CONCLUSIONS
  Participation in managed care does not seem to change physicians' overall preventive care practice behavior. Available data did not reveal major differences in demographics or health status between individual children enrolled in managed care and those not enrolled. That children enrolled in managed care were better immunized and screened than those in fee-for-service Medicaid suggests that physicians receiving compensation under two payment systems may treat children differently depending on each child's mode of reimbursement.
authors.affiliation: Milano Graduate School of Management and Urban Policy, New School for Social Research, New York 10011, USA. hansonk@newschool.edu
authors.forename: K L
authors.initials: KL
authors.lastname: Hanson
authors.forename: G
authors.initials: G
authors.lastname: Fairbrother
authors.forename: P
authors.initials: P
authors.lastname: Kory
authors.forename: G C
authors.initials: GC
authors.lastname: Butts
authors.forename: S
authors.initials: S
authors.lastname: Friedman
mesh_terms: D000740:Anemia / Q000517:prevention & control; D002675:Child, Preschool; D016000:Cluster Analysis; D003430:Cross-Sectional Studies; D018588:Fee-for-Service Plans / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D007114:Immunization / Q000706:statistics & numerical data; D007223:Infant; D007855:Lead Poisoning / Q000517:prevention & control; D008297:Male; D008329:Managed Care Programs / Q000706:statistics & numerical data*; D008403:Mass Screening / Q000706:statistics & numerical data; D008484:Medicaid / Q000458:organization & administration*; D009519:New York City; D009936:Organizational Innovation; D011204:Poverty Areas; D010818:Practice Patterns, Physicians'; D011314:Preventive Health Services / Q000706:statistics & numerical data*; D014481:United States