What is Mattie Siefer's NPI number?

Mattie Siefer's National Provider Identifier (NPI) is 1346032711, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Mattie Siefer's specialty?

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

Where is Mattie Siefer located?

Mattie Siefer's practice location on file with NPPES is 1135 Millville Ave, Hamilton, OH 45013-3938.

What is Mattie Siefer's phone number?

The practice phone number listed in the NPPES registry for Mattie Siefer is (513) 291-2189.

Is Mattie Siefer's NPI active?

Yes — Mattie Siefer's NPI (1346032711) is active in the NPPES registry as of the last update on 2025-05-20.

IndividualActive

Mattie Siefer, RD, LD

NPI 1346032711 · Registered Dietitian · Hamilton, OH

Mattie Siefer, RD, LD is a Registered Dietitian provider in Hamilton, OH (NPI 1346032711).

Provider details

NPI number: 1346032711
Entity type: Individual
Primary specialty: Registered DietitianDietary & Nutritional Service Providers
Credential: RD, LD
Sex: Female
Sole proprietor: No
License: LD.10260 (OH)

Specialties & taxonomies

Registered DietitianPrimary133V00000XLicense LD.10260 (OH)
Dietary & Nutritional Service Providers

Profile Score

Established profile(54/100 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
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

1135 Millville Ave

Hamilton, OH 45013-3938

Phone: (513) 291-2189

Street-level locationGet directions

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Mailing address