Sonja Simzak, MS-MPH, RD, LDN
NPI 1083814289 · Registered Dietitian · Washington, DC
Sonja Simzak, MS-MPH, RD, LDN is a Registered Dietitian provider in Washington, DC (NPI 1083814289).
Provider details
- NPI number
- 1083814289
- Entity type
- Individual
- Primary specialty
- Registered DietitianDietary & Nutritional Service Providers
- Credential
- MS-MPH, RD, LDN
- Sex
- Female
- Sole proprietor
- No
- License
- DX2932 (MD)
Specialties & taxonomies
Dietary & Nutritional Service Providers
Dietary & Nutritional Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 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
Mailing address
Registry dates
- Enumerated
- 2007-07-25
- Last updated
- 2023-02-02
- Certified
- 2023-02-02
Frequently asked questions
- What is Sonja Simzak's NPI number?
- Sonja Simzak's National Provider Identifier (NPI) is 1083814289, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sonja Simzak's specialty?
- Sonja Simzak is listed in the NPPES registry with a primary specialty of Registered Dietitian (Dietary & Nutritional Service Providers).
- Where is Sonja Simzak located?
- Sonja Simzak's practice location on file with NPPES is 5801 Army Pentagon, Washington, DC 20310.
- What is Sonja Simzak's phone number?
- The practice phone number listed in the NPPES registry for Sonja Simzak is (036) 927-8898.
- Is Sonja Simzak's NPI active?
- Yes — Sonja Simzak's NPI (1083814289) is active in the NPPES registry as of the last update on 2023-02-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.