Margaret Riddell
NPI 1033913611 · Family Medicine Physician · Marion, IA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Margaret Riddell is a Family Medicine Physician provider in Marion, IA (NPI 1033913611).
Provider details
- NPI number
- 1033913611
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Sex
- Female
- Sole proprietor
- No
- License
- A181578 (IA)
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
1 yr 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
- 2025-04-02
- Last updated
- 2025-04-02
- Certified
- 2025-04-02
Frequently asked questions
- What is Margaret Riddell's NPI number?
- Margaret Riddell's National Provider Identifier (NPI) is 1033913611, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Riddell's specialty?
- Margaret Riddell is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Margaret Riddell located?
- Margaret Riddell's practice location on file with NPPES is 3701 Katz Dr, Marion, IA 52302-3871.
- What is Margaret Riddell's phone number?
- The practice phone number listed in the NPPES registry for Margaret Riddell is (319) 377-3174.
- Does Margaret Riddell accept Medicare?
- Margaret Riddell is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Margaret Riddell's NPI active?
- Yes — Margaret Riddell's NPI (1033913611) is active in the NPPES registry as of the last update on 2025-04-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.