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Dive into the research topics where Nicholas M. Halzack is active.

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Featured researches published by Nicholas M. Halzack.


A & A case reports | 2016

Anesthesiologists Are Affiliated with Many Hospitals Only Reporting Anesthesia Claims Using Modifier QZ for Medicare Claims in 2013.

Thomas R. Miller; Amr E. Abouleish; Nicholas M. Halzack

We examined hospitals that exclusively used the billing modifier QZ in anesthesia claims for a 5% sample of Medicare beneficiaries in 2013. We used a national Medicare provider file to identify physician anesthesiologists and nurse anesthetists affiliated with these hospitals. Among the 538 hospitals that exclusively reported the modifier QZ, 47.5% had affiliated physician anesthesiologists. These hospitals accounted for 60.4% of the cases. Our results illustrate the challenges of using modifier QZ to describe anesthesia practice arrangements in hospitals. The modifier QZ does not seem to be a valid surrogate for no anesthesiologist being involved in the care provided.


Health Services Insights | 2018

Measuring Team Effectiveness in the Health Care Setting: An Inventory of Survey Tools

Bita A. Kash; Ohbet Cheon; Nicholas M. Halzack; Thomas R. Miller

Background: Guidance for measuring team effectiveness in dynamic clinical settings is necessary; however, there are no consensus strategies to help health care organizations achieve optimal teamwork. This systematic review aims to identify validated survey instruments of team effectiveness by clinical settings. Methods: PubMed, MEDLINE, and ISI Web of Knowledge were searched for team effectiveness surveys deployed from 1990 to 2016. Validity and reliability were evaluated using 4 psychometric properties: interrater agreement, internal consistency, content validity, and structural integrity. Two conceptual frameworks, the Donabedian model and the Command Team Effectiveness model, assess conceptual dimensions most measured in each health care setting. Results: The 22 articles focused on surgical, primary care, and other health care settings. Few instruments report the required psychometric properties or feature non-self-reported outcomes. The major conceptual dimensions measured in the survey instruments differed across settings. Team cohesion and overall perceived team effectiveness can be found in all the team effectiveness measurement tools regardless of the health care setting. We found that surgical settings have distinctive conditions for measuring team effectiveness relative to primary or ambulatory care. Discussion: Further development of setting-specific team effectiveness measurement tools can help further enhance continuous quality improvements and clinical outcomes in the future.


A & A case reports | 2016

In the United States, "Opt-Out" States Show No Increase in Access to Anesthesia Services for Medicare Beneficiaries Compared with Non-"Opt-Out" States.

Eric C. Sun; Thomas R. Miller; Nicholas M. Halzack


ASA Newsletter | 2017

ASA Health Policy Research: 2016 Year in Review, and a Name Change

Thomas R. Miller; Nicholas M. Halzack; Madhulika Agarkar; Jennifer Rock-Klotz


ASA Newsletter | 2017

Health Workforce Projections: Caveat Emptor

Thomas R. Miller; Nicholas M. Halzack; Jennifer Rock-Klotz


ASA Newsletter | 2015

Research Potpourri: Lessons From 2014 Session on Investigators in Health Services Research in Anesthesiology

Thomas R. Miller; Nicholas M. Halzack


ASA Newsletter | 2015

Revisiting the 2014 American Medical Association Physician Economic Impact Study

Nicholas M. Halzack; Thomas R. Miller


ASA Newsletter | 2015

Surgical Procedure Volume in the United States, 2011 and 2013

Nicholas M. Halzack; Thomas R. Miller


ASA Newsletter | 2015

The Volume-Outcomes Relationship in Surgery: So Much Research, So Few Answers

Nicholas M. Halzack; Thomas R. Miller


ASA Newsletter | 2014

Finding Policy Relevance in Lists of ‘Best’ Hospitals

Thomas R. Miller; Nicholas M. Halzack

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Thomas R. Miller

University of Texas Medical Branch

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Amr E. Abouleish

University of Texas Medical Branch

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Ohbet Cheon

Houston Methodist Hospital

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