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Mary Duff, RDN, LDN
NPI 1902526601 · Registered Dietitian · Springfield, MO
Mary Duff, RDN, LDN is a Registered Dietitian provider in Springfield, MO (NPI 1902526601).
Provider details
- NPI number
- 1902526601
- Entity type
- Individual
- Primary specialty
- Registered DietitianDietary & Nutritional Service Providers
- Credential
- RDN, LDN
- Sex
- Female
- Sole proprietor
- No
- License
- 2000175375 (MO)
Specialties & taxonomies
Dietary & Nutritional Service Providers
Profile Score
Established profile(64/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
3 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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
Ozarks Dialysis Services
3525 S. National Ave, Suite 108
Springfield, MO 65807
Phone: (417) 269-8736
Fax: (417) 269-3471
Approximate (ZIP-level) locationGet directions
Mailing address
5814 S Northern Ridge Rd
Springfield, MO 65810-1976
Additional practice locations (1)
- Cox Health3801 S. National Ave.Springfield, MO 65807Phone: (417) 269-6000
Registry dates
- Enumerated
- 2022-09-01
- Last updated
- 2022-09-01
- Certified
- 2022-08-30
Frequently asked questions
- What is Mary Duff's NPI number?
- Mary Duff's National Provider Identifier (NPI) is 1902526601, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Duff's specialty?
- Mary Duff is listed in the NPPES registry with a primary specialty of Registered Dietitian (Dietary & Nutritional Service Providers).
- Where is Mary Duff located?
- Mary Duff's practice location on file with NPPES is Ozarks Dialysis Services, Springfield, MO 65807.
- What is Mary Duff's phone number?
- The practice phone number listed in the NPPES registry for Mary Duff is (417) 269-8736.
- Is Mary Duff's NPI active?
- Yes — Mary Duff's NPI (1902526601) is active in the NPPES registry as of the last update on 2022-09-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.