James B. Nelson, MD
Gastroenterology Physician · Milwaukee, WI
James B. Nelson, MD is a gastroenterology physician with a practice address in Milwaukee, Wisconsin, and NPI 1245291061, issued on Mar 31, 2006. Check the license (Wisconsin 37286, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- James B. Nelson
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 37286 WI
Self-reported in NPPES; status is on the state search - Practice location
- 9200 W Wisconsin Ave, Milwaukee, WI 53226
- Phone
- (414) 805-3310
- Enumerated
- Mar 31, 2006
- Record last updated
- Jan 31, 2023
- Fax
- (414) 805-3885
- Medicaid IDs
- 697658100 MN
1245291061 WI - Medicare enrollment
- Enrolled (PECOS I20040414001513); accepts Medicare assignment
- Medical or professional school
- Medical College Of Wisconsin, 1983
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 340 in Wisconsin → Look up another NPI →
Also registered at 9200 W Wisconsin Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify James B. Nelson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 37286Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Froedtert Andthe Medical College OF Wisconsin Community Physicians IncMenomonee Falls, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
James B. Nelson among 340 gastroenterology physician records in Wisconsin
James B. Nelson, MD is one of 340 gastroenterology physician records with a practice address in Wisconsin. 83% 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 7% of them.
- NPI issued2006 · 7% of these records are older, 44% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated1983 · median 2003 among the 239 with a school on file
- Record last updated2023 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Wisconsin
There are 340 gastroenterology physician records in Wisconsin.
All 340 in Wisconsin → Every provider in Milwaukee → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- John Bjork, M.D.Milwaukee, WI 532261538121512
- James Cunningham, MDWauwatosa, WI 532261225005689
- Kulwinder Dua, MDMilwaukee, WI 532261215988290
- Jose Franco, MDMilwaukee, WI 532261699726547
- Mary Catherine Gerleman, MDWauwatosa, WI 532261134191877
- George Johnson, MDMilwaukee, WI 532261821049677
- Benson Massey, MDMilwaukee, WI 532261407807258
- Robert Molloy, MDWauwatosa, WI 532261043287717
Common questions
What is James B. Nelson, MD's NPI number?
James B. Nelson, MD's National Provider Identifier (NPI) is 1245291061, issued on Mar 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is James B. Nelson, MD located?
The NPPES record lists a practice address at 9200 W Wisconsin Ave, Milwaukee, WI, 53226. Phone: (414) 805-3310. Providers update this record themselves, so call before visiting.
How can I verify James B. Nelson, MD's license?
NPPES lists Wisconsin license number 37286, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
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.
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.