Mary Niewinski, MS, RD, LDN
NPI 1366678153 · Pediatric Nutrition Registered Dietitian · Chicago, IL
Mary Niewinski, MS, RD, LDN is a Pediatric Nutrition Registered Dietitian provider in Chicago, IL (NPI 1366678153).
Provider details
- NPI number
- 1366678153
- Entity type
- Individual
- Primary specialty
- Pediatric Nutrition Registered DietitianDietary & Nutritional Service Providers
- Credential
- MS, RD, LDN
- Sex
- Female
- Sole proprietor
- Yes
Specialties & taxonomies
Dietary & Nutritional Service Providers
- Metabolic Nutrition Registered Dietitian133VN1006X
Dietary & Nutritional Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
17 yrs in NPPES registry
- Profile completeness38% of score
83% 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
- 2009-06-07
- Last updated
- 2009-06-07
Frequently asked questions
- What is Mary Niewinski's NPI number?
- Mary Niewinski's National Provider Identifier (NPI) is 1366678153, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Niewinski's specialty?
- Mary Niewinski is listed in the NPPES registry with a primary specialty of Pediatric Nutrition Registered Dietitian (Dietary & Nutritional Service Providers).
- Where is Mary Niewinski located?
- Mary Niewinski's practice location on file with NPPES is 5424 N Nashville Ave, Chicago, IL 60656-2209.
- What is Mary Niewinski's phone number?
- The practice phone number listed in the NPPES registry for Mary Niewinski is (773) 456-4201.
- Is Mary Niewinski's NPI active?
- Yes — Mary Niewinski's NPI (1366678153) is active in the NPPES registry as of the last update on 2009-06-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.