Great Lakes Radiation Oncology,
NPI 1861444291 · Medical Oncology Physician · Brookfield, WI
Great Lakes Radiation Oncology, is a Medical Oncology Physician organization in Brookfield, WI (NPI 1861444291).
Provider details
- NPI number
- 1861444291
- Entity type
- Organization
- Primary specialty
- Medical Oncology PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- David Sherman, President(414) 447-2221
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-16
- Last updated
- 2020-08-22
Frequently asked questions
- What is Great Lakes Radiation Oncology,'s NPI number?
- Great Lakes Radiation Oncology,'s National Provider Identifier (NPI) is 1861444291, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Great Lakes Radiation Oncology,?
- Great Lakes Radiation Oncology, is classified in the NPPES registry as Medical Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Great Lakes Radiation Oncology, located?
- Great Lakes Radiation Oncology,'s practice location on file with NPPES is 19333 W North Ave, Brookfield, WI 53045-4132.
- What is Great Lakes Radiation Oncology,'s phone number?
- The practice phone number listed in the NPPES registry for Great Lakes Radiation Oncology, is (414) 447-2221.
- Who is the authorized official for Great Lakes Radiation Oncology,?
- The authorized official listed on Great Lakes Radiation Oncology,'s NPPES record is David Sherman, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Great Lakes Radiation Oncology,'s NPI active?
- Yes — Great Lakes Radiation Oncology,'s NPI (1861444291) is active in the NPPES registry as of the last update on 2020-08-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.