When today's listed allergy and immunology clinicians first received their NPI. NPIs were first issued in 2005, so earlier start dates don't appear. Every year with at least one record is shown, so the rows add up to the total. Based on 5,778 individual clinician (NPI-1) records with a primary allergy and immunology taxonomy in the federal NPI Registry.
| Item | Count |
|---|---|
| 2005 | 964 |
| 2006 | 2,198 |
| 2007 | 652 |
| 2008 | 269 |
| 2009 | 143 |
| 2010 | 149 |
| 2011 | 155 |
| 2012 | 143 |
| 2013 | 139 |
| 2014 | 129 |
| 2015 | 115 |
| 2016 | 111 |
| 2017 | 118 |
| 2018 | 127 |
| 2019 | 110 |
| 2020 | 110 |
| 2021 | 84 |
| 2022 | 20 |
| 2023 | 23 |
| 2024 | 6 |
| 2025 | 5 |
| 2026 (partial year) | 8 |
Use this chart with credit to Immunologists.com. See the full chart library or the directory.
Sources
- NPPES NPI Registry (Centers for Medicare and Medicaid Services)
- Counts come from a November 2026 pull of the NPPES NPI Registry API, filtered to records whose primary taxonomy is allergy and immunology. Individual clinicians are NPI-1 records and organizations are NPI-2 records. National counts by the year each NPI was first assigned.
