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Dr. Keith A. Hernandez, MD

Anesthesiology (Anesthesiology Physician)

  • Medicare participating

At a glance

Years since graduation
23
In the NPI registry since
2007
Medicare patients seen, 2024
413

Licensed in Connecticut since 2006, according to the Connecticut Department of Public Health. We show license dates only for the states that publish them in bulk; see which states do. For other states, check the state medical board.

The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is

Education and training

  • 2003Medical school: University of Arizona College of Medicine
  • 2007Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier

Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).

Specialties and state licenses

  • Anesthesiology Physician primary
    CT license 044871 (first issued 2006; active)

As reported to the NPI registry. To confirm a license is current, check the state medical board.

Map: Anesthesiology per capita by county →

Where they work

Medical groups

Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.

Medicare patients and services

Medicare patients, 2024
413
Services billed
560
Patients’ average age
75
Most frequent Medicare services, 2023
ServiceTimesPatients
Anesthesia for lens surgery210154
Anesthesia for nerve destruction procedures on spine or spinal cord of lower back accessed through skin using imaging guidance4434
Anesthesia for nerve block and injection4234
Anesthesia for other procedure on eye3831
Anesthesia for other procedure on skin of arms, legs, and front body3029
Anesthesia for nerve destruction procedures on spine or spinal cord of neck or upper back accessed through skin using imaging guidance1915
Anesthesia for other procedure on lower abdomen1111

Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.

Other Anesthesiology clinicians in New Haven

Sources

NPI registry (CMS NPPES, November 2026; record last updated July 8, 2007), Medicare Care Compare, Medicare Physician & Other Practitioners (2024), Medicare Part D Prescribers (2024) and Open Payments (2025). Information is self-reported or billed data and may be out of date; call before visiting.

NPI 1952506909. Official NPI registry record (opens in a new tab). Clinicians can correct their information in NPPES; changes appear here after our next monthly update.