Santo De Jesus Diaz, M.D.
Critical Care Medicine (Internal Medicine) Physician · Greenfield, WI
Santo De Jesus Diaz, M.D. is a critical care medicine (internal medicine) physician with a practice address in Greenfield, Wisconsin, and NPI 1821143108, issued on Jan 24, 2007. Check the license (Wisconsin 26774, as entered in NPPES) on the Wisconsin Medical Examining Board; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Santo De Jesus Diaz
- Credential
- M.D.
- Primary taxonomy
- Critical Care Medicine (Internal Medicine) Physician 207RC0200X
- License number
- 26774 WI
Self-reported in NPPES; status is on the state search - Practice location
- 4925 S 43RD St, Greenfield, WI 53220
- Phone
- (414) 282-7137
- Enumerated
- Jan 24, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest critical care medicine (internal medicine) physician records → All 134 in Wisconsin → Look up another NPI →
Verify Santo De Jesus Diaz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 26774Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Santo De Jesus Diaz among 134 critical care medicine (internal medicine) physician records in Wisconsin
Santo De Jesus Diaz, M.D. is one of 134 critical care medicine (internal medicine) physician records with a practice address in Wisconsin. 89% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2007, is newer than 30% of them.
- NPI issued2007 · 30% of these records are older, 60% newer
- In a Medicare fileNo · 89% of these records are
- In the CMS Doctors and Clinicians fileNo · 81% of these records are
- Record last updated2007 · 32% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0200X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Critical Care Medicine (Internal Medicine) Physician providers in Wisconsin
There are 134 critical care medicine (internal medicine) physician records in Wisconsin. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 134 in Wisconsin → Every provider in Greenfield → Critical Care Medicine (Internal Medicine) Physician nationwide →
The 8 critical care medicine (internal medicine) physician records with the nearest ZIP codes
- Brad Johnson, MDGreenfield, WI 532201013250737
- Majdi Al Nabulsi, MDMilwaukee, WI 532151063958114
- Rodolfo Alpizar-Rivas, MDMilwaukee, WI 532151427579457
- Luke Collins, MDMilwaukee, WI 532151679006068
- Vladyslav Dieiev, MDMilwaukee, WI 532151962855627
- Kiranpreet Gosal, DOMilwaukee, WI 532151093274896
- Joseph Michael Le Lim, MDMilwaukee, WI 532151548822588
- Katerina Meassick, DOMilwaukee, WI 532151699356642
Common questions
What is Santo De Jesus Diaz, M.D.'s NPI number?
Santo De Jesus Diaz, M.D.'s National Provider Identifier (NPI) is 1821143108, issued on Jan 24, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Santo De Jesus Diaz, M.D. located?
The NPPES record lists a practice address at 4925 S 43RD St, Greenfield, WI, 53220. Phone: (414) 282-7137. Providers update this record themselves, so call before visiting.
How can I verify Santo De Jesus Diaz, M.D.'s license?
NPPES lists Wisconsin license number 26774, 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. 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.