IndividualActive
Kathleen Duffy, RD., LDN
NPI 1659771897 · Registered Dietitian · Oak Park, IL
Kathleen Duffy, RD., LDN is a Registered Dietitian provider in Oak Park, IL (NPI 1659771897).
Provider details
- NPI number
- 1659771897
- Entity type
- Individual
- Primary specialty
- Registered DietitianDietary & Nutritional Service Providers
- Credential
- RD., LDN
- Sex
- Female
- Sole proprietor
- Yes
- License
- 164006269 (IL)
Specialties & taxonomies
Dietary & Nutritional Service Providers
Profile Score
Detailed profile(75/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
11 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
520 S Maple Ave
Oak Park, IL 60304-1022
Phone: (708) 660-5900
Fax: (708) 660-2210
Street-level locationGet directions
Mailing address
520 S Maple Ave
Oak Park, IL 60304-1022
Registry dates
- Enumerated
- 2014-08-25
- Last updated
- 2014-08-25
Frequently asked questions
- What is Kathleen Duffy's NPI number?
- Kathleen Duffy's National Provider Identifier (NPI) is 1659771897, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kathleen Duffy's specialty?
- Kathleen Duffy is listed in the NPPES registry with a primary specialty of Registered Dietitian (Dietary & Nutritional Service Providers).
- Where is Kathleen Duffy located?
- Kathleen Duffy's practice location on file with NPPES is 520 S Maple Ave, Oak Park, IL 60304-1022.
- What is Kathleen Duffy's phone number?
- The practice phone number listed in the NPPES registry for Kathleen Duffy is (708) 660-5900.
- Is Kathleen Duffy's NPI active?
- Yes — Kathleen Duffy's NPI (1659771897) is active in the NPPES registry as of the last update on 2014-08-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.