Michael Harry Mastromichalis, M.D.
Urology Physician · Fenton, MO
Michael Harry Mastromichalis, M.D. is a urology physician with a practice address in Fenton, Missouri, and NPI 1346444700, issued on Jun 12, 2007. Check the license (Missouri 2008016598, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Michael Harry Mastromichalis
- Credential
- M.D.
- Primary taxonomy
- Urology Physician 208800000X
- License number
- 2008016598 MO
Self-reported in NPPES; status is on the state search - Practice location
- 1011 Bowles Ave Ste 425, Fenton, MO 63026
- Phone
- (636) 496-5030
- Enumerated
- Jun 12, 2007
- Record last updated
- Nov 5, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (636) 496-5025
- Medicare enrollment
- Enrolled (PECOS I20230712001232); accepts Medicare assignment
- Medical or professional school
- West Virginia University School Of Medicine, 2005
- Entity
- Type 1 · individual
8 nearest urology physician records → All 266 in Missouri → Look up another NPI →
Also registered at 1011 Bowles Ave Ste 425
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lindsey Adams, NP-CNurse Practitioner1326611757
- Jeannette Bender, FNP-CFamily Nurse Practitioner1104478494
- Courtney Cockerell, D.OGastroenterology Physician1346504644
- Laura Grimmer, MDSurgery Physician1124314497
- Joel Hammond, MDSurgery Physician1790892552
- Patricia Hodgins, M.D.Urology Physician1457791808
Verify Michael Harry Mastromichalis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMissouri Board of Registration for the Healing Arts
Search for license 2008016598Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
11% more Medicare Part D claims than the average urology physician in 2024
1,487 Medicare Part D claims for 459 beneficiaries, against an average of 1,340 among the 10,782 providers of this specialty who prescribed in Part D. 95 claims were for opioids.
Most prescribed
- Tamsulosin Hcl227 claims
- Cephalexin188 claims
- Solifenacin Succinate110 claims
- Finasteride97 claims
- Nitrofurantoin Mono-Macro93 claims
- Methenamine Hippurate67 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
- Ths Physician Partners IncSouth Charleston, WV
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael Harry Mastromichalis among 266 urology physician records in Missouri
Michael Harry Mastromichalis, M.D. is one of 266 urology physician records with a practice address in Missouri. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 50% of them.
- NPI issued2007 · 50% of these records are older, 41% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2005 · median 2004 among the 182 with a school on file
- Record last updated2020 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208800000X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Urology Physician providers in Missouri
There are 266 urology physician records in Missouri.
All 266 in Missouri → Every provider in Fenton → Urology Physician nationwide →
The 8 urology physician records with the nearest ZIP codes
- Patricia Hodgins, M.D.Fenton, MO 630261457791808
- Jeffrey Orf, MDFenton, MO 630261417578527
- Rajen Doshi, MDFestus, MO 630281720060536
- Steven Bigg, MDFlorissant, MO 630311932166162
- James Lovinggood, MDFlorissant, MO 630311558328633
- Uwais Zaid, M.D.Florissant, MO 630311366777856
- Angela Alt, MDChesterfield, MO 630171801915038
- Nimrod Barashi Gozal, MDChesterfield, MO 630171144726084
Common questions
What is Michael Harry Mastromichalis, M.D.'s NPI number?
Michael Harry Mastromichalis, M.D.'s National Provider Identifier (NPI) is 1346444700, issued on Jun 12, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Michael Harry Mastromichalis, M.D. located?
The NPPES record lists a practice address at 1011 Bowles Ave Ste 425, Fenton, MO, 63026. Phone: (636) 496-5030. Providers update this record themselves, so call before visiting.
How can I verify Michael Harry Mastromichalis, M.D.'s license?
NPPES lists Missouri license number 2008016598, as entered by the provider. Search the Missouri Board of Registration for the Healing Arts at https://www.fsmb.org/contact-a-state-medical-board/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Michael Harry Mastromichalis, M.D. prescribe under Medicare Part D?
In 2024, Michael Harry Mastromichalis, M.D. had 1,487 Medicare Part D claims for 459 beneficiaries; the average among urology physician prescribers was 1,340. 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.