Sidney Machefsky, M.D.
NPI 1780617050 · Vascular & Interventional Radiology Physician · St Charles, MO
Sidney Machefsky, M.D. is a Vascular & Interventional Radiology Physician provider in St Charles, MO (NPI 1780617050).
Provider details
- NPI number
- 1780617050
- Entity type
- Individual
- Primary specialty
- Vascular & Interventional Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- R8634 (MO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
- Diagnostic Radiology Physician2085R0202X
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-09
- Last updated
- 2025-09-11
Frequently asked questions
- What is Sidney Machefsky's NPI number?
- Sidney Machefsky's National Provider Identifier (NPI) is 1780617050, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sidney Machefsky's specialty?
- Sidney Machefsky is listed in the NPPES registry with a primary specialty of Vascular & Interventional Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Sidney Machefsky located?
- Sidney Machefsky's practice location on file with NPPES is 300 First Capitol Drive, St Charles, MO 63301.
- What is Sidney Machefsky's phone number?
- The practice phone number listed in the NPPES registry for Sidney Machefsky is (636) 947-5444.
- Is Sidney Machefsky's NPI active?
- Yes — Sidney Machefsky's NPI (1780617050) is active in the NPPES registry as of the last update on 2025-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.