Dr. David S. Rayan, DO
- Part D claims, 2024
- 391
- Hospital affiliations
- 2
- Industry payments
- $8,042
- Medical groups
- 3
- State license
- 1
- Practice address
- 8901 W Lincoln Ave, West Allis, WI 53227
- Practice phone
- Call (414) 328-6000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Rayan's 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. David S. Rayan is an internist in Milwaukee, Wisconsin
Dr. Rayan practices at Aurora West Allis Medical Center in West Allis, Wisconsin, part of Advocate Health.
Dr. Rayan's NPI, 1194287870, was assigned on April 2, 2019. Dr. Rayan holds Wisconsin license 7435221.
- NPI
- 1194287870NPI Registry (opens in a new tab)
- NPI enumeration date
- April 2, 2019
- NPI status
- Active
- Practice phone
- (414) 328-6000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 33
- Medical school graduation
- 2019
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. David S. Rayan practices at Aurora West Allis Medical Center in West Allis, Wisconsin
Dr. Rayan's primary practice is Aurora West Allis Medical Center, at 8901 W Lincoln Ave, West Allis, WI 53227 in Milwaukee County. The practice phone is (414) 328-6000.
- Aurora West Allis Medical Center8901 W Lincoln Ave, West Allis, WI 53227 · Milwaukee CountyPhone(414) 328-6000
Source: Dmand AI Affiliation Data
Dr. David S. Rayan is affiliated with 3 sites of care and 3 medical groups
Dr. Rayan's primary practice is Aurora West Allis Medical Center in West Allis, Wisconsin, part of Advocate Health. Dr. Rayan is also affiliated with Aurora St. Luke's Medical Center. The medical group on file is Aurora Medical Group. Dmand AI also links Dr. Rayan to 2 more medical groups and 1 hospital outpatient department, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. David S. Rayan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Rayan practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Aurora West Allis Medical Center | Available with a free account |
| +2 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. David S. Rayan is one of 1,675 internists in Wisconsin
Internal medicine is Dr. Rayan's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Rayan is licensed in Wisconsin.
Specialties and state licenses
- Internal medicine, WisconsinPrimary
Internists near Dr. Rayan
Counts of internists 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. David S. Rayan's patients have a median age of 66
Across all payers, Dmand AI patient panel data puts Dr. Rayan's median patient age at 66, with 0% women.
Dr. Rayan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 66
Patient panel by sex, all payers
- Women0%
- Men100%
Source: Dmand AI Patient Panel Data
Dr. David S. Rayan wrote 391 Medicare Part D claims in 2024
In 2024, Dr. Rayan wrote 391 Medicare Part D claims for 105 patients. 88% of them were for generic drugs. CMS names the drug for 276 of them, across 12 drugs with 11 or more claims each, at $35,583 in total drug cost. In 2023, CMS named 47 claims across 3 drugs.
Dr. Rayan's Part D claims by kind of drug, 2024
- Generic343 claims88%
- Brand-name48 claims12%
Dr. Rayan's 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. Rayan's Part D claims, 2024
- Antibiotics3%12 of 391 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, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 472024: 276487%
Drugs named by CMS: 12 in 2024, 3 in 2023.
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. David S. Rayan received $8,042 in industry payments from 2022 to 2025
CMS Open Payments shows 63 general payments to Dr. Rayan from 21 drug and device companies from 2022 to 2025. Food and beverage make up the largest share, 88% of the total. Boston Scientific Corporation paid the most, $1,057.
General payments to Dr. Rayan by program year, 2022 to 2025
General payments to Dr. Rayan by kind, 2022 to 2025
- Food and beverage$7,04088%
- Education$4956%
- Travel and lodging$3965%
- Gifts$1121%
Companies that paid Dr. Rayan the most, 2022 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. David S. Rayan'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 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. David S. Rayan
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. David S. Rayan's NPI number?
Dr. David S. Rayan's NPI number is 1194287870. It was assigned on April 2, 2019, and it is active in the NPI Registry.
What kind of doctor is Dr. David S. Rayan?
Dr. David S. Rayan is an internist in Milwaukee, Wisconsin. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. David S. Rayan practice?
Dr. Rayan practices at 8901 W Lincoln Ave, West Allis, WI 53227. Dr. Rayan's primary practice is Aurora West Allis Medical Center in West Allis, Wisconsin, part of Advocate Health. Dmand AI also links Dr. Rayan to 2 medical groups and 1 hospital outpatient department.
What is Dr. David S. Rayan's office phone number?
The practice phone on file for Dr. Rayan is (414) 328-6000.
What is Dr. David S. Rayan's medical license number?
Dr. Rayan holds Wisconsin license 7435221.
Which hospitals is Dr. David S. Rayan affiliated with?
Dr. Rayan practices at Aurora West Allis Medical Center in West Allis, Wisconsin. Dr. Rayan is also affiliated with Aurora St. Luke's Medical Center.
What medical group is Dr. David S. Rayan part of?
Dr. Rayan is linked to Aurora Medical Group. Dmand AI links Dr. Rayan to 2 more medical groups.
What drugs does Dr. David S. Rayan prescribe most?
In 2024 Medicare Part D data, Dr. Rayan's most prescribed drugs by claims were Atorvastatin Calcium, Rosuvastatin Calcium and Carvedilol.
Has Dr. David S. Rayan received payments from drug or device companies?
CMS Open Payments shows $8,042 in general payments to Dr. Rayan from 21 companies from 2022 to 2025. The largest total came from Boston Scientific Corporation.
How long has Dr. David S. Rayan been practicing?
Dr. Rayan graduated from medical school in 2019, 7 years ago.
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