Greg Brown, MD
NPI 1841344231 · Internal Medicine Physician · Waukesha, WI
Enrolled with Medicare as Order and Referring Only - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Greg Brown, MD is a Internal Medicine Physician provider in Waukesha, WI (NPI 1841344231).
Provider details
- NPI number
- 1841344231
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 26924020 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
19 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 17 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Liothyronine Sodium | 58 |
| Cefuroxime Axetilbrand: Cefuroxime | 47 |
| Levothyroxine Sodium | 43 |
| Azithromycin | 30 |
| Clarithromycin | 28 |
| Omeprazole | 24 |
| Valacyclovir Hclbrand: Valacyclovir | 17 |
| Fluconazole | 16 |
| Doxazosin Mesylate | 14 |
| Doxycycline Hyclate | 14 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$61 across 2 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-01-22
- Last updated
- 2013-11-18
Frequently asked questions
- What is Greg Brown's NPI number?
- Greg Brown's National Provider Identifier (NPI) is 1841344231, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Greg Brown's specialty?
- Greg Brown is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Greg Brown located?
- Greg Brown's practice location on file with NPPES is 2607 N. Grandview Blvd, Waukesha, WI 53188.
- What is Greg Brown's phone number?
- The practice phone number listed in the NPPES registry for Greg Brown is (262) 522-8640.
- Does Greg Brown accept Medicare?
- Greg Brown is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Greg Brown's NPI active?
- Yes — Greg Brown's NPI (1841344231) is active in the NPPES registry as of the last update on 2013-11-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.