| Abbreviation or Acronym | Definition |
| AAA | Area Agency on Aging |
| AAC | actual acquisition cost |
| ABA | applied behavioral analysis |
| ABP | alternative benefit plan |
| ACA | Patient Protection and Affordable Care Act |
| ACC | accountable care collaborative |
| ACF | Administration for Children and Families |
| ACIP | Advisory Committee on Immunization Practices |
| ACO | accountable care organization |
| ACS | American Community Survey |
| ADA | Americans with Disabilities Act |
| ADD | attention deficit disorder |
| ADHD | attention deficit hyperactivity disorder |
| ADL | activity of daily living |
| AFDC | Aid to Families with Dependent Children |
| AHRQ | Agency for Health Care Research and Quality |
| AIDS | acquired immune deficiency syndrome |
| AMP | average manufacturer price |
| APC | ambulatory payment classification |
| APRN | advanced practice registered nurse |
| APS | annual person summary |
| ARP | American Rescue Plan |
| ARTS | addiction and recovery treatment services |
| ASAM | American Society of Addiction Medicine |
| ASC | ambulatory surgical center |
| ASP | average sales price |
| ASPE | Assistant Secretary for Planning and Evaluation |
| AVS | asset verification system |
| AWP | average wholesale price |
| BBA 97 | Balanced Budget Act of 1997 |
| BHH | behavioral health homes |
| BHO | behavioral health organization |
| BHP | Basic Health Program |
| BIP | Balancing Incentive Payments Program |
| BMI | body mass index |
| BOE | basis of eligibility |
| BRFSS | Behavioral Risk Factor Surveillance System |
| CAH | critical access hospital |
| CAHMI | Child and Adolescent Health Measurement Initiative |
| CAHPS | Consumer Assessment of Health Care Providers and Systems |
| CARF | Commission on Accreditation of Rehabilitation Facilities |
| CARTS | CHIP Annual Reporting Template System |
| CBO | Congressional Budget Office |
| CBT | cognitive-behavioral therapy |
| CCBHC | certified community behavioral health clinic |
| CCIIO | Center for Consumer Information and Insurance Oversight |
| CCN | CMS certification number |
| CCO | coordinated care organization |
| CCPD | continuous cycling peritoneal dialysis |
| CCR | cost-to-charge ratio |
| CCW | Chronic Condition Data Warehouse |
| CDC | U.S. Centers for Disease Control and Prevention |
| CDL | clinical diagnostic laboratory |
| CDPS | Chronic Illness and Disability Payment System |
| CDT | Current Dental Terminology |
| CEHRT | certified electronic health record technology |
| CF | conversion factor |
| CHAMP-VA | Civilian Health and Medical Program of the Department of Veterans Affairs |
| CHIP | State Children’s Health Insurance Program |
| CHIPRA | Children’s Health Insurance Program Re-Authorization Act |
| CHNA | community health needs assessment |
| CIN | client identification number |
| CLIA | Clinical Laboratory Improvement Amendments of 1988 |
| CMC | comprehensive managed care |
| CMCS | Center for Medicaid and CHIP Services |
| CMHC | community mental health center |
| CMIP | comprehensive Medicaid integrity plan |
| CMS | Centers for Medicare & Medicaid Services |
| CNM | certified nurse-midwife |
| CNOM | costs not otherwise matchable |
| CNS | clinical nurse specialist |
| COBRA | Consolidated Omnibus Budget Reconciliation Act of 1985 |
| CORD | Childhood Obesity Research Demonstration |
| CPE | certified public expenditure |
| CPI | Center for Program Integrity |
| CPI-U | consumer price index for all urban consumers |
| CPNP | certified pediatric nurse practitioner |
| CPS | Current Population Survey |
| CPT | Current Procedural Terminology. CPT® is a registered trademark of the American Medical Association |
| CRNA | certified registered nurse anesthetists |
| CRNP | certified registered nurse practitioner |
| CSHCN | children with special health care needs |
| CSR | cost-sharing reduction |
| CT | computerized tomography |
| CTA | computerized tomography angiography |
| CY | calendar year |
| DHRM | DSH Health Reform Methodology |
| DME | durable medical equipment |
| DOJ | U.S. Department of Justice |
| DRA | Deficit Reduction Act |
| DRG | diagnosis-related group |
| DSH | disproportionate share hospital |
| DSM | Diagnostic and Statistical Manual of Mental Disorders |
| D-SNP | dual-eligible special needs plan |
| DSRIP | delivery system reform incentive payment |
| DSRIP PPS | delivery system reform incentive payment performing provider system |
| DUR | drug utilization review |
| DxCG | diagnostic cost group risk adjustment model |
| E/M | evaluation and management |
| EAC | estimated acquisition cost |
| EAPG | enhanced ambulatory patient group |
| ECP | essential community provider |
| ED | emergency department |
| E-FMAP | enhanced federal medical assistance percentage |
| EHB | essential health benefit |
| EHR | electronic health record |
| EKG | electrocardiogram |
| ELE | express lane eligibility |
| EMTALA | Emergency Medical Treatment and Active Labor Act |
| EPSDT | early and periodic screening, diagnostic, and treatment |
| EQR | external quality review |
| EQRO | external quality review organization |
| ESI | employer-sponsored insurance |
| ESRD | end-stage renal disease |
| FAI | Financial Alignment Initiative |
| FCA | False Claims Act |
| FCHCO | Federal Coordinated Health Care Office |
| FDA | U.S. Food and Drug Administration |
| FERA | Fraud Enforcement and Recovery Act |
| FFCRA | Families First Coronavirus Response Act |
| FFP | federal financial participation |
| FFS | fee for service |
| FIDE SNP | fully integrated dual-eligible special needs plan |
| FMAP | federal medical assistance percentage |
| FMR | financial management report |
| FOA | Family Opportunity Act |
| FPG | federal poverty guidelines |
| FPL | federal poverty level |
| FQHC | federally qualified health center |
| FUL | federal upper limit |
| FY | fiscal year (October 1–September 30) |
| FYE | full-year equivalent |
| GAO | U.S. Government Accountability Office |
| GDP | gross domestic product |
| GME | graduate medical education |
| GPP | global payment program |
| HCAC | health care-acquired condition |
| HCBS | home- and community-based services |
| HCC | hierarchical condition category |
| HCERA | Health Care and Education Reconciliation Act |
| HCFA | Health Care Financing Administration |
| HCFAC | Health Care Fraud and Abuse Control Program |
| HCPCS | Health Care Common Procedure Coding System |
| HCRIS | Health Care Cost Report Information System |
| HCRP | high-cost risk pool |
| HCUP | Health Care Cost and Utilization Project |
| HEAT | Health Care Fraud Prevention and Enforcement Action Team |
| HEDIS | Health Care Effectiveness Data and Information Set |
| HHS | U.S. Department of Health and Human Services |
| HIDE SNP | highly integrated dual-eligible special needs plan |
| HIE | health information exchange |
| HIO | health insuring organization |
| HIPAA | Health Insurance Portability and Accountability Act |
| HIT | health information technology |
| HIU | health insurance unit |
| HMO | health maintenance organization |
| HMOA | Health Maintenance Organization Act |
| HOPD | hospital outpatient department |
| HPSA | health professional shortage area |
| HRA | health risk assessment |
| HRMS | Health Reform Monitoring Survey |
| HRR | hospital referral region |
| HRSA | Health Resources and Services Administration |
| HSI | health services initiative |
| IBNRS | Incurred But Not Reported Survey |
| ICD-10 | International Classification of Diseases, 10th Edition |
| ICF | intermediate care facility |
| ICF/IID | intermediate care facilities for individuals with intellectual disabilities |
| ICT | integrated care team |
| I/DD | intellectual or developmental disabilities |
| IADL | instrumental activity of daily living |
| IDR | integrated data repository |
| IGT | intergovernmental transfer |
| IHS | Indian Health Service |
| IMD | institutions for mental diseases |
| IME | indirect medical education |
| IMU | Index of Medical Underservice |
| IOM | Institute of Medicine |
| IOP | intensive outpatient program |
| IPPS | inpatient prospective payment system |
| IPUMS | Integrated Public Use Microdata Series |
| IRC | Internal Revenue Code |
| IRS | Internal Revenue Service |
| LADC | licensed alcohol and drug counselor |
| LEA | local education agency |
| LIHP | low-income health program |
| LIS | low-income subsidy |
| LM | licensed midwife |
| LOC | level of care |
| LPR | legal permanent resident |
| LTSS | long-term services and supports |
| MA | Medicare Advantage |
| MACBIS | Medicaid and CHIP Business Information Solutions |
| MACPAC | Medicaid and CHIP Payment and Access Commission |
| MACRA | Medicare and CHIP Reauthorization Act |
| MAGI | modified adjusted gross income |
| MAP | Measure Applications Partnership |
| MAS | maintenance assistance status |
| MAT | medication assisted treatment |
| MAX | Medicaid Analytic eXtract |
| MBES/CBES | Medicaid Budget and Expenditure System/State Children’s Health Budget and Expenditure System |
| MBI | Medicaid buy-in |
| MCCA | Medicare Catastrophic Coverage Act |
| MCE | managed care entity |
| MCH | maternal and child health |
| MCHB | Maternal and Child Health Bureau |
| MCO | managed care organization |
| MDE | major depressive episode |
| MDRP | Medicaid Drug Rebate Program |
| MEC | minimum essential coverage |
| Medi-Medi Program | Medicare-Medicaid Data Match Program |
| MedPAC | Medicare Payment Advisory Commission |
| MEMA | member enrollment mix adjustment |
| MEPS | Medical Expenditure Panel Survey |
| MEPS-HC | Medical Expenditure Panel Survey–Household Component |
| MEPS-IC | Medical Expenditure Panel Survey–Insurance Component |
| MEQS | Medicaid Eligibility Quality Control System |
| MFCU | Medicaid Fraud Control Unit |
| MFP | Money Follows the Person |
| MFSDB | Medicare fee schedule database |
| MH/SUD | mental health/substance use disorder |
| MHPA | Mental Health Parity Act of 1996 |
| MHPAEA | Mental Health Parity and Addiction Equity Act of 2008 |
| MIC | Medicaid integrity contractor |
| MIG | Medicaid integrity group |
| MII | Medicaid Integrity Institute |
| MIP | Medicaid Integrity Program |
| MIPPA | Medicare Improvements for Patients and Providers Act |
| MITA | Medicaid Information Technology Architecture |
| MLR | medical loss ratio |
| MLTSS | managed long-term services and supports |
| MMA | Medicare Modernization Act |
| MMCDCS | Medicaid Managed Care Data Collection System |
| MMCO | Medicare-Medicaid Coordination Office |
| MMIS | Medicaid Management Information Systems |
| MMLR | minimum medical loss ratio |
| MMNA | monthly maintenance of need allowance |
| MMP | Medicare-Medicaid Plan |
| MMSEA | Medicare, Medicaid, and SCHIP Extension Act of 2007 |
| MOE | maintenance of effort |
| MOMS | Maternal Opiate Medicine Support Project |
| MOU | memorandum of understanding |
| MOUD | medications to treat opioid use disorder |
| MRA | magnetic resonance angiogram |
| MRI | magnetic resonance imaging |
| MRS | magnetic resonance spectroscopy |
| MSA | metropolitan statistical area |
| MSIS | Medicaid Statistical Information System |
| MSP | Medicare Savings Program |
| MSTAT | Medicaid State Technical Assistance Teams |
| MUA | medically underserved area |
| MUP | medically underserved population |
| NADAC | National Average Drug Acquisition Cost Survey |
| NAMCS | National Ambulatory Medical Care Survey |
| NAMD | National Association of Medicaid Directors |
| NCANDS | National Child Abuse and Neglect Data System |
| NCCI | National Correct Coding Initiative |
| NCHS | National Center for Health Statistics |
| NDC | National Drug Code |
| NEDS | Nationwide Emergency Department Sample |
| NEHRS | National Electronic Health Records Survey |
| NEMT | non-emergency medical transportation |
| NF | nursing facility |
| NFLOC | nursing facility level of care |
| NHAMCS | National Hospital Ambulatory Care Survey |
| NHE | national health expenditures |
| NHIS | National Health Interview Survey |
| NHRA | Nursing Home Reform Act |
| NHSC | National Health Service Corps |
| NICU | neonatal intensive care unit |
| NIDA | National Institute on Drug Abuse |
| NIPT | non-institutional provider team |
| NIRT | National Institutional Reimbursement Team |
| NIS | nationwide inpatient sample |
| N-MHSS | National Mental Health Services Survey |
| NPI | national provider identifier |
| NPPES | National Plan and Provider Enumeration System |
| NPR | net patient revenue |
| NSCAW | National Survey of Child and Adolescent Well-Being |
| NSCH | National Survey of Children’s Health |
| NSCSHCN | National Survey of Children with Special Health Care Needs |
| NSDUH | National Survey on Drug Use and Health |
| NSLP | National School Lunch Program |
| N-SSATS | National Survey of Substance Abuse Treatment Services |
| OACT | Office of the Actuary |
| OASI | Old-Age and Survivors Insurance Trust Fund |
| OB-GYN | obstetrician-gynecologist |
| OBRA | Omnibus Budget Reconciliation Act |
| ODWCC | outpatient departmental weight cost-to-charge |
| OE | operating expenses |
| OFM | Office of Financial Management |
| OIG | Office of Inspector General |
| OMB | Office of Management and Budget |
| OPD | outpatient department |
| OPFS | outpatient prospective fee schedule |
| OPM | U.S. Office of Personnel Management |
| OPPC | other provider preventable conditions |
| OPPS | outpatient prospective payment system |
| OT | occupational therapy |
| OTC | over the counter |
| OTP | opioid treatment program |
| OUD | opioid use disorder |
| P4P | pay for performance |
| PA | physician assistant |
| PACE | Program of All-inclusive Care for the Elderly |
| PAHP | prepaid ambulatory health plans |
| PAPE | payment amount per episode |
| PBM | pharmacy benefit manager |
| PBRHC | provider-based rural health clinic |
| PCA | personal care attendant |
| PCC | primary care clinician |
| PCCM | primary care case management |
| PCMH | patient-centered medical home |
| PCP | primary care provider |
| PCPCH | patient-centered primary care home |
| PCPCP | primary care partial capitation provider |
| PCRI | primary care rate increase |
| PDL | preferred drug list |
| PDMP | prescription drug monitoring program |
| PERM | Payment Error Rate Measurement Program |
| PET | positron emission tomography |
| PHE | public health emergency |
| PHP | prepaid health plan |
| PHUP | Partial Hospitalization Units Program |
| PI | program integrity |
| PIHP | prepaid inpatient health plan |
| PMH | pregnancy medical home |
| PMP | primary medical provider |
| PMPM | per member per month |
| PMPY | per member per year |
| PNA | personal needs allowance |
| POS | point of service |
| PPC | provider preventable conditions |
| PPO | preferred provider organization |
| PPS | prospective payment system |
| PQMP | Pediatric Quality Measures Program |
| PRAMS | Pregnancy Risk Assessment Monitoring System |
| ProPAC | Prospective Payment Assessment Commission |
| PRR | patient review and restriction programs |
| PRTF | psychiatric residential treatment facility |
| PT | physical therapy |
| QDWI | qualifying disabled and working individual |
| QHP | qualified health plan |
| QI | qualifying individual |
| QMB | qualified Medicare beneficiary |
| QPP | Quality Payment Program |
| QRTP | qualified residential treatment program |
| RAC | recovery audit contract |
| RBRVS | resource-based relative value scale |
| RBRVU | resource-based relative value units |
| RCCO | regional care collaborative organizations |
| RDU | renal dialysis units |
| RFI | request for information |
| RFP | request for proposal |
| RHC | rural health clinic |
| RNFA | registered nurse first assistants |
| RVU | relative value unit |
| SAMHSA | Substance Abuse and Mental Health Services Administration |
| SBHC | school-based health center |
| SBIRT | screening, brief intervention and referral to treatment |
| SDMI | severe disabling mental illness |
| SED | severe (or serious) emotional disturbance |
| SEDD | state emergency department database |
| SEDS | Statistical Enrollment Data System |
| SFY | state fiscal year (July 1–June 30) |
| SGA | substantial gainful activity |
| SHADAC | State Health Access Data Assistance Center |
| SHIP | State Health Insurance Assistance Programs |
| SIL | special income level |
| SIM | State Innovation Models Program |
| SIPP | Survey of Income and Program Participation |
| SLMB | specified low-income Medicare beneficiary |
| SLP | speech and language pathology |
| SMAC | state maximum allowable cost |
| SMD | state Medicaid director |
| SMI | serious mental illness |
| SMMM | severe maternal mortality and morbidity |
| SNAP | Supplemental Nutrition Assistance Program |
| SNF | skilled nursing facility |
| SNP | special needs plan |
| SOTA | State Operations and Technical Assistance Initiative |
| SPA | state plan amendment |
| SPMI | serious persistent mental illness |
| SPRY | state plan rate year |
| SSA | Social Security Administration |
| SSBG | Social Services Block Grant |
| SSDI | Social Security Disability Insurance |
| SSI | Supplemental Security Income |
| ST | speech therapy |
| SUD | substance use disorder |
| SUPPORT Act | Substance Use-Disorder Prevention that Promotes Opioid Recovery and Treatment for Patients and Communities Act |
| TANF | Temporary Assistance for Needy Families |
| TAP | technical advisory panel |
| TBI/SCI | traumatic brain or spinal cord injury |
| TEFRA | Tax Equity and Fiscal Responsibility Act |
| TEFT | Testing Experiences and Functional Tools Demonstration |
| TMA | transitional medical assistance |
| T-MSIS | Transformed Medicaid Statistical Information System |
| TNC | transportation network companies |
| TPL | third party liability |
| TTWIIA | Ticket to Work and Work Incentives Improvement Act |
| U&C | usual and customary |
| UC | uncompensated care |
| UCC | uncompensated care cost |
| UCR | usual and customary rate |
| UDS | uniform data system |
| UPL | upper payment limit |
| URA | unit rebate amount |
| USC | usual source of care |
| USPSTF | U.S. Preventive Services Task Force |
| VA | U.S. Department of Veterans Affairs |
| VBP | value-based purchasing |
| VFC | Vaccines for Children program |
| WAC | wholesale acquisition cost |
| WCC | weighted cost-to-charge |
| WDI | working disabled individual |
| WIC | Special Supplemental Nutrition Program for Women, Infants, and Children |
| ZPIC | Zone Program Integrity Contractor |