What is Nathaniel Willis's NPI number?

Nathaniel Willis's National Provider Identifier (NPI) is 1376420992, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Nathaniel Willis's specialty?

Nathaniel Willis is listed in the NPPES registry with a primary specialty of Registered Dietitian (Dietary & Nutritional Service Providers).

Where is Nathaniel Willis located?

Nathaniel Willis's practice location on file with NPPES is 4018 Paunack Ave, Madison, WI 53711-1625.

What is Nathaniel Willis's phone number?

The practice phone number listed in the NPPES registry for Nathaniel Willis is (402) 681-7964.

Is Nathaniel Willis's NPI active?

Yes — Nathaniel Willis's NPI (1376420992) is active in the NPPES registry as of the last update on 2025-08-18.

IndividualActive

Nathaniel Willis, PHD, RD, LDN

NPI 1376420992 · Registered Dietitian · Madison, WI

Nathaniel Willis, PHD, RD, LDN is a Registered Dietitian provider in Madison, WI (NPI 1376420992).

Provider details

NPI number: 1376420992
Entity type: Individual
Primary specialty: Registered DietitianDietary & Nutritional Service Providers
Credential: PHD, RD, LDN
Sex: Male
Sole proprietor: Yes

Specialties & taxonomies

Registered DietitianPrimary133V00000X
Dietary & Nutritional Service Providers

Profile Score

Basic profile(48/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
1 yr 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

4018 Paunack Ave

Madison, WI 53711-1625

Phone: (402) 681-7964

Street-level locationGet directions

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Mailing address