NPPES file of Aug 9, 2026

Tammy Chavarria

Nurse Practitioner · Oakbrook Terrace, IL

Tammy Chavarria is a nurse practitioner with a practice address in Oakbrook Terrace, Illinois, and NPI 1043677529, issued on Jan 28, 2016. Check the license (Illinois 209005920, as entered in NPPES) with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1043677529
Name
Tammy Chavarria
Primary taxonomy
Nurse Practitioner 363L00000X
License numbers
209005920 IL
041303804 IL
28172884A IN
71002390A IN
Self-reported in NPPES; status is on the state search
Practice location
2 Transam Plaza Dr Ste 400, Oakbrook Terrace, IL 60181
Phone
(630) 545-3766
Enumerated
Jan 28, 2016
Record last updated
Jan 6, 2021 (not updated in 5 years: call before relying on the address or phone)
Fax
(630) 933-7392
Medicare enrollment
Enrolled (PECOS I20201103000509); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest nurse practitioner records → All 4,892 in Illinois → Look up another NPI →

Verify Tammy Chavarria in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Illinois board licenses this profession
    Search for license 209005920    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Illinois license search

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Bills Medicare through one group practice

  1. Northwestern Medical Faculty FoundationOakbrook Terrace, IL

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Tammy Chavarria among 4,892 nurse practitioner records in Illinois

Tammy Chavarria is one of 4,892 nurse practitioner records with a practice address in Illinois. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 36% of them.

  • NPI issued2016 · 36% of these records are older, 58% newer
  • In a Medicare fileYes · 81% of these records are
  • In the CMS Doctors and Clinicians fileYes · 69% of these records are
  • Graduated2000 · median 2018 among the 3,389 with a school on file
  • Record last updated2021 · 36% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363L00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

9 nurse practitioner records list a practice address in Oakbrook Terrace

They are 9 of the 282 NPPES records with a practice address in Oakbrook Terrace, and 4,892 nurse practitioner records in Illinois.

All 4,892 in Illinois → Every provider in Oakbrook Terrace → Nurse Practitioner nationwide →

The 8 nurse practitioner records with the nearest ZIP codes

  1. Abigail Boateng-SarpongOakbrook Terrace, IL 601811093647398
  2. Tatiana Grier, NP-COakbrook Terrace, IL 601811174287445
  3. Flordeluz M Leonida, APRNOakbrook Terrace, IL 601811447968789
  4. Julie Miyamasu, APN-CNPVilla Park, IL 601811669410080
  5. Pearle OlatunjiVilla Park, IL 601811942933932
  6. Tracy Omorogieva, APN-CNPOakbrook Terrace, IL 601811003493958
  7. Kimberly RossiOakbrook Terrace, IL 601811871128686
  8. Karolina Valaitis, NPOakbrook Terrace, IL 601811619732781

Common questions

What is Tammy Chavarria's NPI number?

Tammy Chavarria's National Provider Identifier (NPI) is 1043677529, issued on Jan 28, 2016. An NPI identifies a provider in billing; it is not a license.

Where is Tammy Chavarria located?

The NPPES record lists a practice address at 2 Transam Plaza Dr Ste 400, Oakbrook Terrace, IL, 60181. Phone: (630) 545-3766. Providers update this record themselves, so call before visiting.

How can I verify Tammy Chavarria's license?

NPPES lists Illinois license number 209005920, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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 only as counts) 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 9, 2026.