Guillermo Miguel Valenzuela Cortez, MD
Internal Medicine Physician · Johnson Creek, WI
Guillermo Miguel Valenzuela Cortez, MD is an internal medicine physician with a practice address in Johnson Creek, Wisconsin, and NPI 1710597174, issued on Jul 31, 2020. Check the license (Wisconsin 83885-20, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Guillermo Miguel Valenzuela Cortez
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 83885-20 WI
MT222042 PA
Self-reported in NPPES; status is on the state search - Practice location
- 400 Doctors CT, Johnson Creek, WI 53038
- Phone
- (920) 699-4245
- Enumerated
- Jul 31, 2020
- Record last updated
- Sep 23, 2024
- Fax
- (920) 699-4748
- Medicare enrollment
- Enrolled (PECOS I20240807000444); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,078 in Wisconsin → Look up another NPI →
Also registered at 400 Doctors CT
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Guillermo Miguel Valenzuela Cortez in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 83885-20Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
20 Medicare Part D claims for 11 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $1,210.40
6 payments; by number, the most common kind was food and beverage; the largest payer was Mimedx Group, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Fort Healthcare IncJohnson Creek, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Guillermo Miguel Valenzuela Cortez among 2,078 internal medicine physician records in Wisconsin
Guillermo Miguel Valenzuela Cortez, MD is one of 2,078 internal medicine physician records with a practice address in Wisconsin. 70% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 84% of them.
- NPI issued2020 · 84% of these records are older, 14% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2010 · median 2002 among the 1,098 with a school on file
- Record last updated2024 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1 internal medicine physician record lists a practice address in Johnson Creek
They are 1 of the 36 NPPES records with a practice address in Johnson Creek, and 2,078 internal medicine physician records in Wisconsin.
All 2,078 in Wisconsin → Every provider in Johnson Creek → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Christopher Budny, MDKewaskum, WI 530401598783995
- Charlotte Rutkowski, MDKewaskum, WI 530401003228743
- Michael CadaBrookfield, WI 530451356529804
- Anna EdlebeckBrookfield, WI 530451073790804
- Patrick Fitzgerald, M.D.Brookfield, WI 530451326010026
- Barbara Horner-Ibler, MDBrookfield, WI 530451225145840
- Christopher Lieb, MDBrookfield, WI 530451427071240
- Swarnambal Mani, M.D.Brookfield, WI 530451487844353
Common questions
What is Guillermo Miguel Valenzuela Cortez, MD's NPI number?
Guillermo Miguel Valenzuela Cortez, MD's National Provider Identifier (NPI) is 1710597174, issued on Jul 31, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Guillermo Miguel Valenzuela Cortez, MD located?
The NPPES record lists a practice address at 400 Doctors CT, Johnson Creek, WI, 53038. Phone: (920) 699-4245. Providers update this record themselves, so call before visiting.
How can I verify Guillermo Miguel Valenzuela Cortez, MD's license?
NPPES lists Wisconsin license number 83885-20, 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.
How much does Guillermo Miguel Valenzuela Cortez, MD prescribe under Medicare Part D?
In 2024, Guillermo Miguel Valenzuela Cortez, MD had 20 Medicare Part D claims for 11 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
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.