Charlotte Niznik, APN
NPI 1598973042 · Women's Health Clinical Nurse Specialist · Chicago, IL
Enrolled with Medicare as Practitioner - Certified Clinical Nurse Specialist (cns) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Charlotte Niznik, APN is a Women's Health Clinical Nurse Specialist provider in Chicago, IL (NPI 1598973042).
Provider details
- NPI number
- 1598973042
- Entity type
- Individual
- Primary specialty
- Women's Health Clinical Nurse SpecialistPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- APN
- Sex
- Female
- Sole proprietor
- Yes
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing 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
- 2007-05-18
- Last updated
- 2007-07-08
Frequently asked questions
- What is Charlotte Niznik's NPI number?
- Charlotte Niznik's National Provider Identifier (NPI) is 1598973042, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Charlotte Niznik's specialty?
- Charlotte Niznik is listed in the NPPES registry with a primary specialty of Women's Health Clinical Nurse Specialist (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Charlotte Niznik located?
- Charlotte Niznik's practice location on file with NPPES is 645 N Michigan Ave, Chicago, IL 60611-2826.
- What is Charlotte Niznik's phone number?
- The practice phone number listed in the NPPES registry for Charlotte Niznik is (312) 503-4715.
- Does Charlotte Niznik accept Medicare?
- Charlotte Niznik is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Charlotte Niznik's NPI active?
- Yes — Charlotte Niznik's NPI (1598973042) 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.