Sidney Machefsky, M.D.
Diagnostic Radiology Physician · St Charles, MO
Sidney Machefsky, M.D. is a diagnostic radiology physician with a practice address in St Charles, Missouri, and NPI 1780617050, issued on Jul 9, 2006. Check the license (Missouri R8634, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Sidney Machefsky
- Credential
- M.D.
- Primary taxonomy
- Diagnostic Radiology Physician 2085R0202X
- License number
- R8634 MO
Self-reported in NPPES; status is on the state search - Practice location
- 300 First Capitol Drive, St Charles, MO 63301
- Phone
- (636) 947-5444
- Enumerated
- Jul 9, 2006
- Entity
- Type 1 · individual
Also registered at 300 First Capitol Drive
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Brian Boyd, MDDiagnostic Radiology Physician1952506313
- Daniel Cohen, MDDiagnostic Radiology Physician1558351171
- Cole Denton, MDVascular & Interventional Radiology Physician1245527142
- Gunvir Gill, MDStudent in an Organized Health Care Education/Training Program1013188762
- Cory Malone, MDStudent in an Organized Health Care Education/Training Program1306378245
- Carl Mazzola, MDDiagnostic Radiology Physician1801967138
Verify Sidney Machefsky 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 R8634Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
10 diagnostic radiology physician records list a St Charles practice address
They are 10 of the 73 NPPES records with a St Charles practice address, and 945 diagnostic radiology physician records in Missouri. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 10 in St Charles → All 945 in Missouri → Every provider in St Charles →
Other diagnostic radiology physician records in Missouri
- Mohammed Abbas, M.D.Fenton, MO1306057310
- Archana Abhyankar, MDChesterfield, MO1477710051
- Daniel Abodeely, M.D.Saint Louis, MO1578554762
- Shepherd Abrams, M.D.Saint Louis, MO1518941335
- Natasha Acosta, MDKansas City, MO1447288253
- Baron Adkins, D.O.Osage Beach, MO1992754147
- Ankita Aggarwal, MDSaint Louis, MO1316837701
- Mustaq Ahmad, M.D.Kansas City, MO1912911777
- Tabassum Ahmad, MDSaint Louis, MO1134296916
- Humera Ahsan, M.D.Columbia, MO1114157443
Common questions
What is Sidney Machefsky, M.D.'s NPI number?
Sidney Machefsky, M.D.'s National Provider Identifier (NPI) is 1780617050, issued on Jul 9, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Sidney Machefsky, M.D. located?
The NPPES record lists a practice address at 300 First Capitol Drive, St Charles, MO, 63301. Phone: (636) 947-5444. Providers update this record themselves, so call before visiting.
How can I verify Sidney Machefsky, M.D.'s license?
NPPES lists Missouri license number R8634, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.