Background

In document Three Essays in Health Economics (Page 48-51)

Medicaid Coverage of Smoking Cessation Treatment and

2.2 Background

2.2.1

Medicaid Coverage of Smoking Cessation Treatments

Medicaid is government-subsidized health insurance for over 62 million low- income children, pregnant women, low-income adults, and disabled adults. Chil- dren comprise 49 percent of Medicaid’s beneficiaries, 25 percent are non-disabled adults, and the remainder are disabled adults and elderly Medicare-Medicaid dual eligibles. Enrollment is projected to increase by nearly 26 million people by 2020, 80 percent of whom will be adults that are eligible under the new ACA rules (Office of the Actuary, 2011).

Medicaid programs are state-administered, resulting in significant heterogene- ity in both the timing of benefit adoption and the generosity of benefits across states.2 Table 2.1 describes variation in Medicaid coverage of smoking cessation treatment across Medicaid programs. For each state that has implemented any form of coverage, the table lists the year coverage began, the type of therapies initially covered, the number of therapies initially covered, and the number of therapies covered in 2007.3 Prior to 1996, only Rhode Island’s Medicaid program

offered any coverage for nicotine dependence treatment. In 1996, the Agency for Health Care Policy and Research’s (AHCPR) published evidence-based guidelines advising clinicians and health care administrators to identify smokers and conduct interventions to reduce smoking. The Agency recommended that insurance pur- chasers (e.g. Medicaid, Medicare, employers) require insurers to cover counseling

2The District of Columbia also has a Medicaid program.

3The last year included in the analysis in this paper is 2007. For a description of how the

and other treatments for nicotine addiction. That same year, 18 Medicaid pro- grams initiated coverage for nicotine dependence treatment. Between 1996 at 2007, an additional 26 Medicaid programs began some form of coverage.

Although most states offered some form of coverage prior to the ACA, Table 2.1 shows that the number of treatments covered varies significantly across states. Smoking cessation treatments can be categorized into three types: nicotine re- placement therapies, pharmacotherapies, and counseling. Nicotine replacement therapies include the nicotine patch, gum, lozenge, nasal spray, and inhaler. Ver- sions of the patch, gum, and lozenge are available over-the-counter, while nasal spray and inhalers are available by prescription only. Pharmacotherapies include bupropion and varenicline, marketed under the names Zyban and Chantix.4 These prescription medications reduce nicotine cravings and nicotine withdrawal symp- toms. Lastly, counseling includes group, individual, and telephone counseling.

Until 1996, most states only covered nicotine replacement therapies. Once Zy- ban entered the market in 1997, nearly every state that offered a nicotine replace- ment therapy also covered Zyban. Over time, states have increased the number of covered therapies — the average program initiated with 4.8 therapies and has expanded to cover 6.5 therapies. Medicaid most commonly covers the nicotine patch, nicotine gum, and Zyban, while counseling is the least likely treatment to be covered.

This is the first economics paper to investigate the effect of Medicaid cover- age of smoking cessation therapies on smoking behavior; however, a handful of

4Zyban was approved by the FDA for smoking cessation therapy in 1997; however, the same

active ingredient is included in some antidepressant medications and was prescribed for smoking cessation prior to 1997. Chantix entered the market in 2006.

studies have been completed in the field of public health. These papers employ a variety of statistical methods on different samples, resulting in a range of es- timates from very large reductions in smoking to no effect. Petersen, Garrett, Melvin, and Hartmann (2006) uses Pregnancy Risk Assessment Monitoring Sys- tem (PRAMS) data to compare the quitting rates during pregnancy of women in states with Medicaid coverage of smoking cessation to the quitting rates of pregnant women in states without coverage. Although women in states with cov- erage are 1.6 times more likely to quit than women in states without coverage, this difference could be due to state characteristics that are correlated with cov- erage of SCTs by Medicaid. Land, Warner, Paskowsky, Cammaerts, Wetherell, Kaufmann, Zhang, Malarcher, Pechacek, and Keithly (2010) use data from the Behavioral Risk Factor Surveillance System to examine Massachusetts’ implemen- tation of SCT coverage in 2006, finding that the smoking rate fell by 26 percent among Medicaid smokers after the reform. Because the timing of SCT coverage coincided with the state’s health care reform, it is not possible to separate the effect of SCT coverage from the other effects of health reform. The authors also describe advertising campaigns, a cigarette tax increase, and a large increase in the number of Medicaid enrollees that occurred just after the policy change and acknowledge that their estimates embody the effects of these concurrent events. Liu (2009, 2010) uses the CPS-TUS to investigate quitting behavior; however, the sample is conditioned on being a current smoker, which could be affected by the policy itself. Most recently, Adams, Markowitz, Dietz, and Tong (2013) find no impact of Medicaid SCT coverage on smoking during pregnancy or after de-

livery for Medicaid mothers using PRAMS data; however, the authors split the treatment into three separate variables, making it difficult to identify an effect.

Despite inconclusive evidence on the efficacy of Medicaid coverage for nicotine dependence treatment, randomized-control trials and quasi-experimental research suggests that use of smoking cessation therapies is effective at reducing smok- ing. Clinical trials show that smokers who use nicotine replacement therapies are 50 to 100 percent more likely to quit than individuals given a placebo, with similar results for pharmacotherapy (Cummings and Hyland, 2005; Wu, Wilson, Dimoulas, and Mills, 2006; Stead, Perera, Bullen, Mand, Hartmann-Boyce, Cahill, and Lancaster, 2012). Increased availability of nicotine replacement therapies (e.g. lower price or over-the-counter availability) has been found to reduce demand for cigarettes in economic studies (Keeler, Hu, Keith, Manning, Marciniak, Ong, and Sung, 2002; Tauras and Chaloupka, 2003; Chaloupka and Tauras, 2004). If smoking cessation therapies are effective at helping smokers quit, yet there is in- conclusive evidence that insurance coverage of these therapies lowers the smoking rate among Medicaid patients, it is possible that Medicaid patients are not using the benefit. The next section explores this possibility.

2.2.2

Use of Smoking Cessation Therapies by Medicaid

In document Three Essays in Health Economics (Page 48-51)