Survey Results and Products

Web Tables

The annual NAMCS and NHAMCS-ED and NHAMCS-OPD summaries that have been published in the National Health Statistics Report series since 2006 and, prior to that, in the Advance Data from Vital and Health Statistics series, have been discontinued. The last year for the annual summary publications was 2007. Highlights from each new year of NAMCS and NHAMCS data are now being featured in the shorter Data Brief series. However, the standard tables from the traditional summaries will continue to be produced in PDF format on the web. These are referred to as Summary Tables in the links below. Other tables are also available, some combining data across surveys or across years. Also shown are data from the National Electronic Health Records Survey (NEHRS), which started as a NAMCS supplement.

• 2021
• 2020
• 2019
• 2018-2019
• 2018

Ambulatory Care Monthly News

Factsheets

The Ambulatory and Hospital Care Statistics Branch compiles a series of Factsheets for each physician specialty group sampled in NAMCS, as well as hospital emergency and outpatient departments sampled in NHAMCS. These Factsheets present data on ambulatory medical care visits provided at the sampled physicians’ offices and the sampled hospitals.

• 2018 – present

Special Topics

• National estimates of non-pediatric office-based physician acceptance of new Medicare, Medicaid or privately insured patients [PDF – 79 KB]
  • NAMCS physician induction interview data for 2021 were used.
  • Accept new Medicare patients: 88.8% (confidence interval: 83.9 – 92.6%)
  • Accept new Medicaid patients: 77.0% (confidence interval: 71.5 – 82.0%)
  • Accept new privately insured patients: 87.6% (confidence interval: 82.7 – 91.5%)
  • Non-pediatric office-based physicians who accept new Medicare, Medicaid or private insured patients is defined as physicians who responded “yes” to accepting new patients and “yes” to accepting patients who have Medicare, Medicaid or private insurance as the source of payment. Information on acceptance of new patients was missing (blank, unknown, refused) for 1.0% of physicians. For those who responded, the level of missing data (unknown, refused) for payment source accepted for new patients ranged from 1.9—5.0% depending on the payment source. In all, 93.7% of non-pediatric office-based physicians reported that they accepted new patients.
• National estimates of non-pediatric office-based physician acceptance of new Medicare, Medicaid or privately insured patients [PDF – 56 KB]
  • NAMCS physician induction interview data for 2020 were used.
  • Accept new Medicare patients: 86.4% (confidence interval: 81.9 – 90.1%)
  • Accept new Medicaid patients: 71.5% (confidence interval: 66.2 – 76.4%)
  • Accept new privately insured patients: 84.2% (confidence interval: 79.6 – 88.0%)
  • Non-pediatric office-based physicians who accept new Medicare, Medicaid or private insured patients is defined as physicians who responded “yes” to accepting new patients and “yes” to accepting patients who have Medicare, Medicaid or private insurance as the source of payment. Information on acceptance of new patients was missing (blank, unknown, refused) for 1.7% of physicians. For those who responded, the level of missing data (unknown, refused) for payment source accepted for new patients ranged from 3.5—8.1% depending on the payment source.
• National estimates of ambulatory care visits among certain classes of immunosuppressed patients
  • NAMCS data for 2018 were used to estimate the number of visits to office-based physicians by immunosuppressed patients. Immunosuppression was defined as visits with any of the following characteristics: Any-listed reason for visit (up to 5 reported) of transplant (reason for visit codes 4565.0-4565.2); any-listed diagnosis code (up to 5 reported) of Chronic lymphocytic leukemia (ICD-10-CM, C91.1), Arthropathic psoriasis (L40.5), Rheumatoid arthritis with rheumatoid factor (M05), Other rheumatoid arthritis (M06), Enteropathic arthropathies (M07), or Postinfective and reactive arthropathies (M02); and any-listed drug mention (up to 30 reported) of Mycophenolate (drugid code d03839), Rituximab (drugid code d04255), or Methotrexate (drugid code d00060). The estimated number of visits to office-based physicians that met these criteria was 17,444,000 (2% of all office-based physician visits). We consider this estimate to be unreliable; its 95% confidence interval ranges from 6,900,000 to 27,987,000 visits. NHAMCS data were used to estimate the corresponding number of hospital emergency department (ED) visits. The estimated number of ED visits in 2018 that met these criteria was 348,000 (0.3% of all ED visits).