How many dermatologists are in Maricopa County?

NPPES does not publish a county-level field of practice in its public API. Maricopa County sits within Arizona, which lists 426 active dermatologists (5.62 per 100,000) per the 2026-05-06 snapshot. State-level density is the most precise public-source figure available for county queries.

Is Maricopa County considered underserved for dermatologists?

Arizona sits above the 4-per-100k threshold the parent Fonteum study uses for "underserved." Whether Maricopa County specifically is underserved relative to the rest of the state requires county-level field-of-practice data that NPPES does not publish.

U.S. Centers for Medicare & Medicaid Services NPI Registry (NPPES) — public API Combined with U.S. Census Bureau Population Estimates Program, 2024 Vintage (V2024) Snapshot: 2026-05-06. Full per-state dataset: fonteum.com/research/dermatology-provider-supply-by-state-2026.

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PROVIDER ACCESS GAP · COUNTY

dermatologists per 100,000 — Maricopa County, AZ

Name: Maricopa County (AZ) — dermatologist supply context
Creator: Fonteum Research
Published: 2026-05-06
License: https://fonteum.com/editorial-policy

Maricopa County (4,654,147 residents) sits within Arizona, where dermatologists are listed at 5.62 per 100,000.

Geographic scopeMaricopa County sits within Arizona. The figure below reports Arizona-wide density; NPPES does not publish a county-level field of practice in its public API, so a state-level figure is the most precise public-source measure available.

dermatologists per 100,000 residents

5.62

426 active dermatologists · 7,582,384 residents · Arizona

National rank: 19 / 51
Percentile: 65th
Underserved threshold: 4 / 100k
Quartile: Q2

Comparable areas

Three states whose dermatologist per-100k density is closest to Arizona's — useful for benchmarking.

Virginiarank 20

5.60 / 100k

Washingtonrank 215.59 / 100k

Oregonrank 185.66 / 100k

Citeable result

Plain-text citation block — paste verbatim into a brief, story, or report.

Arizona has 426 active dermatologists (5.62 per 100,000 residents) — ranked 19 of 51 U.S. states + DC. Source: CMS NPPES NPI Registry + U.S. Census Bureau, snapshot 2026-05-06. Threshold for "underserved" in the parent study: 4 per 100,000. Citation: Fonteum Research, /research/dermatology-provider-supply-by-state-2026.

Source provenance

U.S. Centers for Medicare & Medicaid Services NPI Registry (NPPES) — public API
U.S. Census Bureau Population Estimates Program, 2024 Vintage (V2024)
Snapshot date: 2026-05-06

Open the parent dermatologist-supply study →

Limitations

This figure measures density (per-capita supply), not access. Drive time, appointment availability, insurance acceptance, and wait times are not modeled here.
The CMS NPPES registry counts NPI-1 individual providers with the relevant taxonomy code. It does not capture PA-led or NP-led practices that operate under a different taxonomy.
NPPES does not publish a county-level field of practice in its public API. County- and ZIP-scoped queries surface state-level density, with the geographic context preserved on this page.
Population is the U.S. Census Bureau 2024 vintage estimate. Population shifts post-2024 are not yet reflected.
The "underserved" threshold is the parent study's transparent baseline cutoff; it is not a regulatory or clinical definition. See the parent study for the rationale.

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Compliance posture