John George Sanidas, M.D.
Internal Medicine Physician · Mequon, WI
John George Sanidas, M.D. is an internal medicine physician with a practice address in Mequon, Wisconsin, and NPI 1356388359, issued on May 31, 2006. Check the license (Wisconsin 38112, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- John George Sanidas
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 38112 WI
Self-reported in NPPES; status is on the state search - Practice location
- 13133 N Port Washington RD, Mequon, WI 53097
- Phone
- (262) 243-5000
- Enumerated
- May 31, 2006
- Record last updated
- Nov 9, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (262) 243-2527
- Medicaid ID
- 1356388359 WI
- Medicare enrollment
- Enrolled (PECOS I20051114000384); accepts Medicare assignment
- Medical or professional school
- Medical College Of Wisconsin, 1995
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,078 in Wisconsin → Look up another NPI →
Also registered at 13133 N Port Washington RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John George Sanidas in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 38112Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
5.1 times the Medicare Part D claims of the average internal medicine physician in 2024
16,167 Medicare Part D claims for 919 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 475 claims were for opioids.
Most prescribed
- Atorvastatin Calcium1,262 claims
- Levothyroxine Sodium906 claims
- Losartan Potassium682 claims
- Amlodipine Besylate624 claims
- Rosuvastatin Calcium491 claims
- Trazodone Hcl391 claims
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.
The practice group's MIPS final score for 2023 (Medicare payment program): 81.5 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Madison Medical Affiliates IncMequon, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John George Sanidas among 2,078 internal medicine physician records in Wisconsin
John George Sanidas, M.D. 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 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 46% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated1995 · median 2002 among the 1,098 with a school on file
- Record last updated2016 · 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).
25 internal medicine physician records list a practice address in Mequon
They are 25 of the 1,048 NPPES records with a practice address in Mequon, and 2,078 internal medicine physician records in Wisconsin.
All 2,078 in Wisconsin → Every provider in Mequon → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Deidre Faust, MDMequon, WI 530971154372092
- David Goldberg, MDMequon, WI 530971285792127
- Scott Jorgensen, M.D.Mequon, WI 530971184654725
- David Lucke, M.D.Mequon, WI 530971477580686
- George Munkwitz, M.D.Mequon, WI 530971073750238
- Rachel Oosterbaan-Panarese, M.D.Mequon, WI 530971588690986
- Enid Trotman, MDMequon, WI 530971174602619
- Alan Detwiler, MDWatertown, WI 530981871597211
Common questions
What is John George Sanidas, M.D.'s NPI number?
John George Sanidas, M.D.'s National Provider Identifier (NPI) is 1356388359, issued on May 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John George Sanidas, M.D. located?
The NPPES record lists a practice address at 13133 N Port Washington RD, Mequon, WI, 53097. Phone: (262) 243-5000. Providers update this record themselves, so call before visiting.
How can I verify John George Sanidas, M.D.'s license?
NPPES lists Wisconsin license number 38112, 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 John George Sanidas, M.D. prescribe under Medicare Part D?
In 2024, John George Sanidas, M.D. had 16,167 Medicare Part D claims for 919 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is John George Sanidas, M.D.'s MIPS final score?
The 2023 MIPS final score is 81.5 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.