Medical emergency?Emergency? Call 911. Nearest emergency roomsNearest ERs

Emergency Medicine

Alexander W. Schermer, MD

Works at hospitals in Lihue, HI · Hawaii

Summary

Dr. Alexander W. Schermer, MD is an emergency medicine doctor at 3-3420 Kuhio Hwy, Suite B, Lihue, HI 96766. Phone: (808) 245-1500. Accepts Medicare assignment. In 2024, Alexander W. Schermer had 439 Original Medicare patients and 1,048 services. NPI 1457351397. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

  • Specialty: Emergency medicine doctor (Medicare lists Emergency Medicine)
  • Address: 3-3420 Kuhio Hwy, Suite B, Lihue, HI 96766 · Directions
  • Phone: (808) 245‑1500
  • Medicare: Accepts Medicare assignment
  • Hospital: Wilcox Memorial Hospital
  • Group practice: Kauai Medical Clinic
  • Medical school: East Tennessee State University Quillen College Of Medicine · graduated 1999 (27 years since medical school)
  • Gender (as listed): Male

From official Medicare data

This page shows what Medicare's official clinician data says about Alexander W. Schermer, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Alexander W. Schermer accept Medicare assignment?
Yes. Medicare's clinician data says Alexander W. Schermer accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
How many Medicare patients does Alexander W. Schermer see?
In 2024, CMS data shows 439 Original Medicare patients and 1,048 services for Alexander W. Schermer. This counts Original Medicare only and measures volume, not quality.
What is Alexander W. Schermer's NPI number?
1457351397. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Medicare activity in 2024

Official CMS public-use data for Alexander W. Schermer, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Original Medicare patients439
Services billed to Medicare1,048
Different services or procedures40
Participating Medicare providerYes
Average age of these patients74

Most frequent services

  1. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)318 services
  2. Injection, dexamethasone sodium phosphate, 1 mg (J1100)130 services
  3. Detection test by immunoassay with direct visual observation for influenza virus (87804)92 services
  4. 2019-ncov coronavirus, sars-cov-2/2019-ncov (covid-19), any technique, multiple types or subtypes (includes all targets), non-cdc (U0002)90 services
  5. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)71 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

  • High cholesterol75%
  • High blood pressure67%
  • Arthritis34%
  • Diabetes27%
  • Chronic kidney disease22%
  • Asthma16%

Hospitals where Alexander W. Schermer works

Medicare's Facility Affiliation Data lists Alexander W. Schermer at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

  • Wilcox Memorial HospitalLihue, HI · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 120014

Practice locations

Addresses where Alexander W. Schermer is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Alexander W. Schermer as a member of this group (CMS data updated October 2, 2026).

  • Kauai Medical Clinic147 clinicians in the group

Specialties

Find other Emergency Medicine doctors in Hawaii →

Other emergency medicine doctors in Lihue

Clinicians with the same Medicare primary specialty in Lihue, HI — not a recommendation.

All emergency medicine doctors in Lihue →

Other clinicians in Kauai Medical Clinic

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialMD
Medical schoolEast Tennessee State University Quillen College Of Medicine
Graduation year1999 (27 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1457351397
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians