David Redfern, MD
NPI 1750334751 · Allergy & Immunology Physician · Waterloo, IA
David Redfern, MD is a Allergy & Immunology Physician provider in Waterloo, IA (NPI 1750334751).
Provider details
- NPI number
- 1750334751
- Entity type
- Individual
- Primary specialty
- Allergy & Immunology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 30869 (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
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
Mailing address
Registry dates
- Enumerated
- 2006-05-18
- Last updated
- 2007-10-09
Frequently asked questions
- What is David Redfern's NPI number?
- David Redfern's National Provider Identifier (NPI) is 1750334751, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Redfern's specialty?
- David Redfern is listed in the NPPES registry with a primary specialty of Allergy & Immunology Physician (Allopathic & Osteopathic Physicians).
- Where is David Redfern located?
- David Redfern's practice location on file with NPPES is 1753 W Ridgeway Ave, Waterloo, IA 50701-4588.
- What is David Redfern's phone number?
- The practice phone number listed in the NPPES registry for David Redfern is (319) 833-5982.
- Is David Redfern's NPI active?
- Yes — David Redfern's NPI (1750334751) is active in the NPPES registry as of the last update on 2007-10-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.