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Rex Rundquist, MD
NPI 1881691392 · Pediatrics Physician · Sioux City, IA
Rex Rundquist, MD is a Pediatrics Physician provider in Sioux City, IA (NPI 1881691392).
Provider details
- NPI number
- 1881691392
- Entity type
- Individual
- Primary specialty
- Pediatrics PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 21617 (IA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(91/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 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
1125 Pierce St
Sioux City, IA 51105-1485
Phone: (712) 255-8901
Fax: (712) 255-9161
Street-level locationGet directions
Mailing address
1125 Pierce St
Sioux City, IA 51105-1484
Registry dates
- Enumerated
- 2005-06-30
- Last updated
- 2017-04-27
Frequently asked questions
- What is Rex Rundquist's NPI number?
- Rex Rundquist's National Provider Identifier (NPI) is 1881691392, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Rex Rundquist's specialty?
- Rex Rundquist is listed in the NPPES registry with a primary specialty of Pediatrics Physician (Allopathic & Osteopathic Physicians).
- Where is Rex Rundquist located?
- Rex Rundquist's practice location on file with NPPES is 1125 Pierce St, Sioux City, IA 51105-1485.
- What is Rex Rundquist's phone number?
- The practice phone number listed in the NPPES registry for Rex Rundquist is (712) 255-8901.
- Is Rex Rundquist's NPI active?
- Yes — Rex Rundquist's NPI (1881691392) is active in the NPPES registry as of the last update on 2017-04-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.