Dr. William Montague Downs, MD
- Medicare services, 2022
- 83
- Part D claims, 2024
- 144
- Industry payments
- $14
- Affiliated sites
- 1
- Medical group
- 1
- Practice address
- 9611 Waena Road, Waimea, HI 96796
- Practice phone
- Call (808) 338-1681
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Kauai Care Center
Skilled Nursing Facility · Waimea, Hawaii
Find Dr. Downs' professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. William Montague Downs is an emergency medicine physician in Waimea, Hawaii
Dr. Downs practices at Kauai Care Center in Waimea, Hawaii.
Dr. Downs' NPI, 1164527537, was assigned on September 13, 2006. Dr. Downs holds Hawaii license MD-2101.
- NPI
- 1164527537NPI Registry (opens in a new tab)
- NPI enumeration date
- September 13, 2006
- NPI status
- Active
- Practice phone
- (808) 338-1681
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. William Montague Downs practices at Kauai Care Center in Waimea, Hawaii
Dr. Downs' primary practice is Kauai Care Center, at 9611 Waena Road, Waimea, HI 96796 in Kauai County. The practice phone is (808) 338-1681.
- Kauai Care Center9611 Waena Road, Waimea, HI 96796 · Kauai CountyPhone(808) 338-1681
Source: Dmand AI Affiliation Data
Dr. William Montague Downs is affiliated with 1 site of care and 1 medical group
Dr. Downs' primary practice is Kauai Care Center in Waimea, Hawaii. The medical group on file is Kauaʻi Medical Clinic.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. William Montague Downs' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Downs practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Kauai Care Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. William Montague Downs is one of 393 emergency medicine physicians in Hawaii
Emergency medicine is Dr. Downs' primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Downs is licensed in Hawaii.
Specialties and state licenses
- Emergency medicine, HawaiiPrimary
Emergency medicine physicians near Dr. Downs
Counts of emergency medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. William Montague Downs billed Medicare for 83 services in 2022
CMS data shows 83 Medicare services from Dr. Downs across 3 procedure codes in 2022. Medicare paid $5,482 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Downs' Medicare services by type, 2021 to 2022
- 2021
- 2022
- Office and hospital visits
- 2021: 1472022: 5761%
- Tests and treatments
- 2021: 442022: 2641%
Dr. Downs compared with the Hawaii median for emergency medicine physicians, 2022
- Dr. Downs
- Hawaii median
- Medicare services
- 83vs 22964% below
- Part D claims
- 12vs 7283% below
Medians across 378 emergency medicine physicians in Hawaii with Dmand AI profiles that report each measure.
Dr. Downs' most billed Medicare procedure codes, 2022
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Downs?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Downs and other emergency medicine physicians in Hawaii.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. William Montague Downs' patients have a median age of 86
Across all payers, Dmand AI patient panel data puts Dr. Downs' median patient age at 86, with 62% women.
Dr. Downs' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 86
Patient panel by sex, all payers
- Women62%
- Men38%
Source: Dmand AI Patient Panel Data
Dr. William Montague Downs wrote 144 Medicare Part D claims in 2024
In 2024, Dr. Downs wrote 144 Medicare Part D claims for 56 patients. 87% of them were for generic drugs. CMS names the drug for 12 of them, across 1 drug with 11 or more claims each, at $69 in total drug cost. In 2021, CMS named 24 claims across 2 drugs.
Dr. Downs' Part D claims by kind of drug, 2024
- Generic125 claims87%
- Brand-name19 claims13%
Dr. Downs' most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Downs' Part D claims, 2024
- Antibiotics18%26 of 144 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2021 to 2024
- 2021
- 2024
- Claims for drugs CMS names
- 2021: 242024: 1250%
Drugs named by CMS: 1 in 2024, 2 in 2021.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Dr. William Montague Downs received $14 in industry payments in 2023
CMS Open Payments shows 1 general payment to Dr. Downs from 1 drug or device company in 2023. Food and beverage make up the largest share, 100% of the total. BioXcel Therapeutics, Inc. paid the most, $14.
Companies that paid Dr. Downs the most, 2023 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. William Montague Downs's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. William Montague Downs
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. William Montague Downs' NPI number?
Dr. William Montague Downs' NPI number is 1164527537. It was assigned on September 13, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. William Montague Downs?
Dr. William Montague Downs is an emergency medicine physician in Waimea, Hawaii. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. William Montague Downs practice?
Dr. Downs practices at 9611 Waena Road, Waimea, HI 96796. Dr. Downs' primary practice is Kauai Care Center in Waimea, Hawaii.
What is Dr. William Montague Downs' office phone number?
The practice phone on file for Dr. Downs is (808) 338-1681.
What is Dr. William Montague Downs' medical license number?
Dr. Downs holds Hawaii license MD-2101.
What medical group is Dr. William Montague Downs part of?
Dr. Downs is linked to Kauaʻi Medical Clinic.
Does Dr. William Montague Downs accept Medicare?
Yes. CMS data shows Dr. Downs billed Medicare for 83 services in 2022.
What services does Dr. William Montague Downs bill to Medicare?
In 2022, Dr. Downs' most billed Medicare services were emergency department visit (99285), heart test or procedure (93010) and emergency department visit (99284).
What drugs does Dr. William Montague Downs prescribe most?
In 2024 Medicare Part D data, Dr. Downs' most prescribed drugs by claims were Azithromycin.
Has Dr. William Montague Downs received payments from drug or device companies?
CMS Open Payments shows $14 in general payments to Dr. Downs from 1 company from 2023 to 2023. The largest total came from BioXcel Therapeutics, Inc.
How long has Dr. William Montague Downs been practicing?
Dr. Downs' NPI was assigned in 2006.
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