John Mihailidis, M.D.
Endocrinology, Diabetes & Metabolism Physician · Neenah, WI
John Mihailidis, M.D. is an endocrinology, diabetes & metabolism physician with a practice address in Neenah, Wisconsin, and NPI 1194036533, issued on Jun 30, 2010. Check the license (Wisconsin 84089, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- John Mihailidis
- Credential
- M.D.
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License numbers
- 84089 WI
30557 NE
311791 NY
Self-reported in NPPES; status is on the state search - Practice location
- 130 2ND St, Neenah, WI 54956
- Phone
- (920) 358-1223
- Enumerated
- Jun 30, 2010
- Record last updated
- Aug 1, 2024
- Medicare enrollment
- Enrolled (PECOS I20240815004603); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 187 in Wisconsin → Look up another NPI →
Also registered at 130 2ND St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lynn Abitz, RD, CDRegistered Dietitian1801011127
- Katelyn Algas, MSOT, OTR/LOccupational Therapist1528673555
- Nicholas AndersonPediatrics Physician1366976409
- Robert Anderson, M.D.Anesthesiology Physician1679672638
- Roshani AryalStudent in an Organized Health Care Education/Training Program1972426435
- Crystal Bales, DNP, RN, CPNPPediatric Nurse Practitioner1376094664
Verify John Mihailidis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 84089Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
16% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
2,211 Medicare Part D claims for 540 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 57% of claims.
Most prescribed
- Levothyroxine Sodium249 claims
- Mounjaro178 claims
- Synthroid175 claims
- Ozempic168 claims
- Synjardy Xr92 claims
- Trulicity92 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.
Bills Medicare through one group practice
- Thedacare, IncorporatedNeenah, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Mihailidis among 187 endocrinology, diabetes & metabolism physician records in Wisconsin
John Mihailidis, M.D. is one of 187 endocrinology, diabetes & metabolism physician records with a practice address in Wisconsin. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 63% of them.
- NPI issued2010 · 63% of these records are older, 35% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2010 · median 2003 among the 134 with a school on file
- Record last updated2024 · 48% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in Wisconsin
There are 187 endocrinology, diabetes & metabolism physician records in Wisconsin.
All 187 in Wisconsin → Every provider in Neenah → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Junting Degrood, MDNeenah, WI 549561871190058
- Vinay Patel, M.D.Neenah, WI 549561477764744
- Laura Andrews, MDMenasha, WI 549521548254535
- Sorin Herscovici, M.D.Menasha, WI 549521568429272
- Iftikhar Malik, MDAppleton, WI 549111780616136
- Lindsay Bromley, MDOshkosh, WI 549041659536126
- Ayham Chamseddin, M.D.Oshkosh, WI 549041932135324
- Cynthia Leigh, MDOshkosh, WI 549041942294517
Common questions
What is John Mihailidis, M.D.'s NPI number?
John Mihailidis, M.D.'s National Provider Identifier (NPI) is 1194036533, issued on Jun 30, 2010. An NPI identifies a provider in billing; it is not a license.
Where is John Mihailidis, M.D. located?
The NPPES record lists a practice address at 130 2ND St, Neenah, WI, 54956. Phone: (920) 358-1223. Providers update this record themselves, so call before visiting.
How can I verify John Mihailidis, M.D.'s license?
NPPES lists Wisconsin license number 84089, 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 Mihailidis, M.D. prescribe under Medicare Part D?
In 2024, John Mihailidis, M.D. had 2,211 Medicare Part D claims for 540 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. 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.