Margaret Mayer Herzfeld, MS, RD, CD
NPI 1992820252 · Registered Dietitian · Milwaukee, WI
Margaret Mayer Herzfeld, MS, RD, CD is a Registered Dietitian provider in Milwaukee, WI (NPI 1992820252).
Provider details
- NPI number
- 1992820252
- Entity type
- Individual
- Primary specialty
- Registered DietitianDietary & Nutritional Service Providers
- Credential
- MS, RD, CD
- Sex
- Female
- Sole proprietor
- Yes
Specialties & taxonomies
Dietary & Nutritional Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 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
- 2007-03-19
- Last updated
- 2007-07-08
Frequently asked questions
- What is Margaret Mayer Herzfeld's NPI number?
- Margaret Mayer Herzfeld's National Provider Identifier (NPI) is 1992820252, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Mayer Herzfeld's specialty?
- Margaret Mayer Herzfeld is listed in the NPPES registry with a primary specialty of Registered Dietitian (Dietary & Nutritional Service Providers).
- Where is Margaret Mayer Herzfeld located?
- Margaret Mayer Herzfeld's practice location on file with NPPES is 2025 E Newport Ave, Milwaukee, WI 53211-2906.
- What is Margaret Mayer Herzfeld's phone number?
- The practice phone number listed in the NPPES registry for Margaret Mayer Herzfeld is (414) 961-3660.
- Is Margaret Mayer Herzfeld's NPI active?
- Yes — Margaret Mayer Herzfeld's NPI (1992820252) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.