ALOS	Average Length of Stay = Medicare's inpatient GMLOS
ADA	American Dental Association
AHA	American Hospital Association
AMA	American Medical Association
ASO	Administrative Services Only
CC	Complication or Cormorbid condition
CDT-2	Current Dental Terminology, Second Edition; source: American Dental Association
CF	Conversion Factor
CFR	Code of Federal Regualtions
CHAP	Community Health Accreditation Program
CHIN	Community Health Information Network
CMI	Case Mix Index
COB	Coordination Of Benefits
CPT-4	Current Procedural Terminology, Fourth Edition - used for defining outpatient treatment; source: American Medical Association
CRS	Children's Rehabilitation Services
CY	Calendar Year
DHMO	Dental Health Maintenance Organization
DR	Direct Reimbursement
DRG	Diagnostic Related Groups - groupings of inpatient diagnostic codes
EOB	Explanation Of Benefits
EPO	Exclusive Provider Organization
FFS	Fee For Service
FSA	Fee Schedule Area
GAF	Geographic Adjustment Factor
GPCI	Geographic Practice Cost Index
HCFA	Health Care Finance Administration
HCPAC	Health Care Professionals Advisory Committee
HCPCS	HCFA Common Procedure Coding System
GMLOS	Geometric Mean Length of Stay
HEDIS	Health plan Employer Data and Information Set
HHS	(Department of) Health and Human Services
HMO	Health Maintenance Organization
ICD-9-CM	International Classification of Diseases - 9th Revision - Clinical Modification
IDS	Integrated Delivery System
IHS	Indian Health Services
IPA	Independent Practice Association
JCAHO	Joint Commission on Accreditation of Healthcare Organizations
MCO	Managed Care Organization
MDC	Major Diagnostic Category
MyHealthScore.com	Medical Cost and Quality Assistance
MSA	Metropolitan Statistical Area
MSO	Management Services Organization
MVPS	Medicare Volume Performance Standards
NCQA	National Committee for Quality Assurance
OBRA	Omnibus Budget Reconciliation Acty
OPHC	Office of Pre-paid Health Care
OT	Outlier Threshold
PAC	Performance Assessment Committee
PC	Professional Component
PCP	Primary Care Physician
PHO	Physician Hospital Organization
POS	Point Of Service
PPO	Preferred Provider Organization
PPS	Perspective Payment System
PSN	Provider Sponsored Network
RBRVS	Resource Based Relative Value Schedule
RDRG	Refined Diagnostic Related Groups
RUC	Relative (Value) Update Committee (from AMA Specialty Society)
RVP	Relative Value for Physicians
RVU	Relative Value Unit
TC	Technical Component
TPA	Third Party Administrator
VSP	Vision Service Plan