Nastassja Williams, APN
Family Nurse Practitioner · Chicago, IL
Nastassja Williams, APN is a family nurse practitioner with a practice address in Chicago, Illinois, and NPI 1578960969, issued on Dec 1, 2014. Check the license (Illinois 209.012242, as entered in NPPES) with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Nastassja Williams
- Credential
- APN
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- 209.012242 IL
Self-reported in NPPES; status is on the state search - Practice location
- 259 E. Erie Lavin Pavilion 16TH Floor, Chicago, IL 60611
- Phone
- (312) 695-5620
- Enumerated
- Dec 1, 2014
- Entity
- Type 1 · individual
Verify Nastassja Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Illinois board licenses this profession
Search for license 209.012242Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
The Medicare quality score for 2023: 94.1 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
1,567 family nurse practitioner records list a practice address in Chicago
They are 1,567 of the 63,379 NPPES records with a practice address in Chicago, and 7,639 family nurse practitioner records in Illinois.
All 1,567 in Chicago → All 7,639 in Illinois → Every provider in Chicago →
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Common questions
What is Nastassja Williams, APN's NPI number?
Nastassja Williams, APN's National Provider Identifier (NPI) is 1578960969, issued on Dec 1, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Nastassja Williams, APN located?
The NPPES record lists a practice address at 259 E. Erie Lavin Pavilion 16TH Floor, Chicago, IL, 60611. Phone: (312) 695-5620. Providers update this record themselves, so call before visiting.
How can I verify Nastassja Williams, APN's license?
NPPES lists Illinois license number 209.012242, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.
What is Nastassja Williams, APN's Medicare quality score?
The 2023 MIPS final score is 94.1 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments, the HHS-OIG exclusion list) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.