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Cristin Freeman · SciRah

Researcher profile · Semantic Scholar

Cristin Freeman

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Cristin Freeman — researcher profile on SciRah

h-index: 11
Works: 36
Citations: 736

Most-cited papers

Location, Location, Location: Geographic Clustering of Lower-Extremity Amputation Among Medicare Beneficiaries With Diabetes
D. Margolis, O. Hoffstad, Jeffrey Nafash, Charles E. Leonard +3 more
2011Diabetes Care163 citations Open access
Semantic Scholar
Validation of diagnostic codes for outpatient-originating sudden cardiac death and ventricular arrhythmia in Medicaid and Medicare claims data
S. Hennessy, Charles E. Leonard, Cristin Freeman, R. Deo +4 more
2009Pharmacoepidemiology and Drug Safety158 citations Open access
Semantic Scholar
Risk of Hip Fracture Associated with Hepatitis C Virus Infection and Hepatitis C/HIV Coinfection
V. L. Re, Jessica Volk, C. Newcomb, Yu-Xiao Yang +6 more
2012Hepatology88 citations Open access
Semantic Scholar
Proton pump inhibitors and traditional nonsteroidal anti‐inflammatory drugs and the risk of acute interstitial nephritis and acute kidney injury
Charles E. Leonard, Cristin Freeman, C. Newcomb, P. Reese +4 more
2012Pharmacoepidemiology and Drug Safety85 citations
Semantic Scholar
Antipsychotics and the Risks of Sudden Cardiac Death and All-Cause Death: Cohort Studies in Medicaid and Dually-Eligible Medicaid-Medicare Beneficiaries of Five States
Charles E. Leonard, Cristin Freeman, C. Newcomb, W. Bilker +3 more
2012Journal of Clinical & Experimental Cardiology69 citations Open access
Semantic Scholar
Comparative risk of ischemic stroke among users of clopidogrel together with individual proton pump inhibitors
Charles E. Leonard, W. Bilker, C. Brensinger, D. Flockhart +4 more
2015Stroke32 citations Open access
Semantic Scholar
A system for de-identifying medical message board text
A. Benton, Shawndra Hill, L. Ungar, Annie Chung +3 more
20102010 Ninth International Conference on Machine Learning and Applications31 citations Open access
Semantic Scholar
US Government Claims Databases
S. Hennessy, Cristin Freeman, F. Cunningham
201229 citations Open access
Semantic Scholar
Safety of saxagliptin: rationale for and design of a series of postmarketing observational studies
V. L. Re, K. Haynes, E. Ming, Jennifer Wood Ives +18 more
2012Pharmacoepidemiology and Drug Safety21 citations
Semantic Scholar
CYP2C9, CYP2C19 and ABCB1 Genotype and Hospitalization for Phenytoin Toxicity
S. Hennessy, Charles E. Leonard, Cristin Freeman, J. Metlay +3 more
2009Journal of clinical pharmacology20 citations Open access
Semantic Scholar
Empiric Potassium Supplementation and Increased Survival in Users of Loop Diuretics
Charles E. Leonard, H. Razzaghi, Cristin Freeman, Jason A. Roy +2 more
2014PLoS ONE18 citations Open access
Semantic Scholar
Utilization and cost of anticancer biologic products among Medicare beneficiaries, 2006–2009
Charles E. Leonard, Cristin Freeman, T. MaCurdy, Karla López de Nava +3 more
20116 citations
Semantic Scholar
Utilization of antidiabetic drugs among Medicare beneficiaries with diabetes, 2006-2009
D. Margolis, Charles E. Leonard, H. Razzaghi, O. Hoffstad +5 more
20124 citations
Semantic Scholar
Utilization of antihypertensive drug classes among Medicare beneficiaries with hypertension, 2007 to 2009
R. Townsend, Charles E. Leonard, Karla López de Nava, T. Molina +2 more
20114 citations
Semantic Scholar
Examples of Existing Automated Databases
S. Toh, S. Andrade, M. Raebel, D. Boudreau +16 more
20132 citations
Semantic Scholar
The effect of a physician-targeted intervention on metoclopramide prescribing practice
Yu-Xiao Yang, Charles E. Leonard, Cristin Freeman, S. Hennessy
2011Therapeutics and Clinical Risk Management2 citations Open access
Semantic Scholar
Utilization of anticancer biologic products among Medicare beneficiaries, by diagnostic cancer subchapter, 2006–2009
Cristin Freeman, Charles E. Leonard, Karla López de Nava, T. Molina +1 more
20112 citations
Semantic Scholar
Response to commentary entitled ‘Commentary on the validation studies of sudden cardiac death and ventricular arrhythmia by Hennessy et al. and Chung et al.’
Charles E. Leonard, Cristin Freeman, R. Deo, C. Newcomb +4 more
20102 citations
Semantic Scholar
The effect of a physician-targeted intervention on metoclopramide prescribing practice
Yu-Xiao Yang, Charles E. Leonard, Cristin Freeman, S. Hennessy
20111 citations
Semantic Scholar
Figure 2, Utilization of thiazolidinediones per 100 diabetic Medicare beneficiaries with continuous enrollment in Parts A and B FFS and Part D, by HRR, 2006-2009
D. Margolis, Charles E. Leonard, H. Razzaghi, O. Hoffstad +5 more
20120 citations
Semantic Scholar
Table 1, Yearly prevalence (%) of antidiabetic drug class utilization among diabetic Medicare beneficiaries with continuous enrollment in Parts A and B FFS and Part D, 2006-2009
D. Margolis, Charles E. Leonard, H. Razzaghi, O. Hoffstad +5 more
20120 citations
Semantic Scholar
Figure 3, 2006–2009 total Medicare reimbursement, as billed via the Carrier file, for monoclonal antibodies of interest accounting for at least $20 million in costs in 2009
Charles E. Leonard, Cristin Freeman, T. MaCurdy, Karla López de Nava +3 more
20110 citations
Semantic Scholar
Table 2, HCPCS and CPT codes used to identify biologics of interest during the study period
Charles E. Leonard, Cristin Freeman, T. MaCurdy, Karla López de Nava +3 more
20110 citations
Semantic Scholar
Table 1, Percentage of beneficiaries with specific cancer diagnoses, by ICD-9 subchapter, among claims for individual anticancer biologics
Cristin Freeman, Charles E. Leonard, Karla López de Nava, T. Molina +1 more
20110 citations
Semantic Scholar
Figure 1, Percentage of total Medicare inpatient reimbursement for the five highest cost ICD-9 chapters among inpatient claims
Charles E. Leonard, Cristin Freeman, T. MaCurdy, C. Umscheid +6 more
20110 citations
Semantic Scholar
Figure 9, 2006–2009 total out-of-pocket expenses, as identified via the Part D file, for other and miscellaneous immunomodulators and immunosuppressives of interest accounting for at least $3 million in expenses in 2009
Charles E. Leonard, Cristin Freeman, T. MaCurdy, Karla López de Nava +3 more
20110 citations
Semantic Scholar
Figure 2, Proportion (%) of Medicare FFS beneficiaries with a claim for a kinase inhibitor, by geography, 2006 vs. 2009
Charles E. Leonard, Cristin Freeman, T. MaCurdy, Karla López de Nava +3 more
20110 citations
Semantic Scholar
Figure 7, 2006–2009 total out-of-pocket expenses, as identified via the Part D file, for kinase inhibitors of interest accounting for at least $1 million in expenses in 2009
Charles E. Leonard, Cristin Freeman, T. MaCurdy, Karla López de Nava +3 more
20110 citations
Semantic Scholar
Figure 10, 2006–2009 total drug costs, as identified via the Part D file, for other and miscellaneous immunomodulators and immunosuppressives of interest presented in Figure 9
Charles E. Leonard, Cristin Freeman, T. MaCurdy, Karla López de Nava +3 more
20110 citations
Semantic Scholar
Table 1, Medicare FFS beneficiaries with at least one Part A, B, or D claim for an anticancer biologic of interest, 2006–2009
Charles E. Leonard, Cristin Freeman, T. MaCurdy, Karla López de Nava +3 more
20110 citations
Semantic Scholar
Prevalence and Medicare reimbursement by recurrent international classification of diseases categories, 2006–2009
Charles E. Leonard, Cristin Freeman, T. MaCurdy, C. Umscheid +6 more
20110 citations
Semantic Scholar
Figure 3, The proportion (%) of lenalidomide users with a malignancy of lymphatic and hematopoietic tissue diagnosis in the 6 months prior, 2006–2009, by geography
Cristin Freeman, Charles E. Leonard, Karla López de Nava, T. Molina +1 more
20110 citations
Semantic Scholar
Figure 1, Proportion (%) of Medicare FFS beneficiaries with a claim for a monoclonal antibody, by geography, 2006 vs. 2009
Charles E. Leonard, Cristin Freeman, T. MaCurdy, Karla López de Nava +3 more
20110 citations
Semantic Scholar
Figure 4, 2006–2009 total Medicare reimbursement, as billed via the Carrier file, for biologic response modifiers of interest
Charles E. Leonard, Cristin Freeman, T. MaCurdy, Karla López de Nava +3 more
20110 citations
Semantic Scholar
Figure 5, 2006–2009 total Medicare reimbursement, as billed via the Outpatient file, for monoclonal antibodies of interest presented in Figure 3
Charles E. Leonard, Cristin Freeman, T. MaCurdy, Karla López de Nava +3 more
20110 citations
Semantic Scholar
Figure 8, 2006–2009 total drug costs, as identified via the Part D file, for kinase inhibitors of interest presented in Figure 7
Charles E. Leonard, Cristin Freeman, T. MaCurdy, Karla López de Nava +3 more
20110 citations
Semantic Scholar

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Karla López de Nava×21
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T. MaCurdy×17
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