Margaret Free, MD
NPI 1891215414 · Pediatric Infectious Diseases Physician · Sioux Falls, SD
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Margaret Free, MD is a Pediatric Infectious Diseases Physician provider in Sioux Falls, SD (NPI 1891215414).
Provider details
- NPI number
- 1891215414
- Entity type
- Individual
- Primary specialty
- Pediatric Infectious Diseases PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 14352 (SD)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
8 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
- 2017-06-24
- Last updated
- 2023-10-03
- Certified
- 2023-10-03
Frequently asked questions
- What is Margaret Free's NPI number?
- Margaret Free's National Provider Identifier (NPI) is 1891215414, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Free's specialty?
- Margaret Free is listed in the NPPES registry with a primary specialty of Pediatric Infectious Diseases Physician (Allopathic & Osteopathic Physicians).
- Where is Margaret Free located?
- Margaret Free's practice location on file with NPPES is 1600 W 22nd St, Sioux Falls, SD 57105-1521.
- What is Margaret Free's phone number?
- The practice phone number listed in the NPPES registry for Margaret Free is (605) 312-1000.
- Does Margaret Free accept Medicare?
- Margaret Free is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Margaret Free's NPI active?
- Yes — Margaret Free's NPI (1891215414) is active in the NPPES registry as of the last update on 2023-10-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.