NPPES file of Aug 9, 2026

William Montague Downs, M.D.

Emergency Medicine Physician · Lihue, HI

William Montague Downs, M.D. is an emergency medicine physician with a practice address in Lihue, Hawaii, and NPI 1164527537, issued on Sep 13, 2006. Check the license (Hawaii MD-2101, as entered in NPPES) on the Hawaii Medical Board; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1164527537
Name
William Montague Downs
Credential
M.D.
Primary taxonomy
Emergency Medicine Physician 207P00000X
License number
MD-2101 HI
Self-reported in NPPES; status is on the state search
Practice location
4457 Pahee St, Lihue, HI 96766
Phone
(808) 245-7277
Enumerated
Sep 13, 2006
Record last updated
Feb 23, 2026
Fax
(808) 245-5006
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest emergency medicine physician records → All 370 in Hawaii → Look up another NPI →

Also registered at 4457 Pahee St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Linda Crocker, LCSWClinical Social Worker1659751048
  2. Miriam Imai, RNRegistered Nurse1265310072

Verify William Montague Downs in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersHawaii Medical Board
    Search for license MD-2101    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Hawaii license search

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36% fewer Medicare Part D claims than the average emergency medicine physician in 2024

144 Medicare Part D claims for 56 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims.

  1. William Downs144
  2. Specialty average226

Most prescribed

  1. Azithromycin12 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

William Montague Downs among 370 emergency medicine physician records in Hawaii

William Montague Downs, M.D. is one of 370 emergency medicine physician records with a practice address in Hawaii. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 3% of them.

  • NPI issued2006 · 3% of these records are older, 64% newer
  • In a Medicare fileYes · 78% of these records are
  • In the CMS Doctors and Clinicians fileNo · 55% of these records are
  • Record last updated2026 · 56% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Hawaii practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

14 emergency medicine physician records list a practice address in Lihue

They are 14 of the 644 NPPES records with a practice address in Lihue, and 370 emergency medicine physician records in Hawaii.

All 370 in Hawaii → Every provider in Lihue → Emergency Medicine Physician nationwide →

The 8 emergency medicine physician records with the nearest ZIP codes

  1. Robert Conrad, M.D.Lihue, HI 967661013012533
  2. Reese Dare, M.D.Lihue, HI 967661144753427
  3. Thomas Del Ninno, MDLihue, HI 967661972008837
  4. Christopher Elliott, M.D.Lihue, HI 967661528163847
  5. Samuel Ho, M.D.Lihue, HI 967661326571753
  6. Amy Hutson, M.D.Lihue, HI 967661134293889
  7. Ted Lee, M.D.Lihue, HI 967661134514383
  8. Mark Magelssen, M.D.Lihue, HI 967661366547432

Common questions

What is William Montague Downs, M.D.'s NPI number?

William Montague Downs, M.D.'s National Provider Identifier (NPI) is 1164527537, issued on Sep 13, 2006. An NPI identifies a provider in billing; it is not a license.

Where is William Montague Downs, M.D. located?

The NPPES record lists a practice address at 4457 Pahee St, Lihue, HI, 96766. Phone: (808) 245-7277. Providers update this record themselves, so call before visiting.

How can I verify William Montague Downs, M.D.'s license?

NPPES lists Hawaii license number MD-2101, as entered by the provider. Search the Hawaii Medical Board at https://cca.hawaii.gov/pvl/boards/medical/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does William Montague Downs, M.D. prescribe under Medicare Part D?

In 2024, William Montague Downs, M.D. had 144 Medicare Part D claims for 56 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.