Andrea Leigh Warren, APRN, FNP
Family Nurse Practitioner · Oak Lawn, IL
Andrea Leigh Warren, APRN, FNP is a family nurse practitioner with a practice address in Oak Lawn, Illinois, and NPI 1427423367, issued on Dec 3, 2015. Check the license (Illinois 277003944, as entered in NPPES) with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Andrea Leigh Warren
- Credential
- APRN, FNP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- 277003944 IL
Self-reported in NPPES; status is on the state search - Practice location
- 9555 S 52ND Ave, Oak Lawn, IL 60453
- Phone
- (708) 634-0950
- Enumerated
- Dec 3, 2015
- Record last updated
- Feb 27, 2025
- Fax
- (708) 634-0942
- Medicare enrollment
- Enrolled (PECOS I20160210001845); may accept Medicare assignment
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 7,639 in Illinois → Look up another NPI →
Also registered at 9555 S 52ND Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Andrea Leigh Warren in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Illinois board licenses this profession
Search for license 277003944Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
73% fewer Medicare Part D claims than the average family nurse practitioner in 2024
348 Medicare Part D claims for 233 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D.
Most prescribed
- Fluticasone Propionate58 claims
- Amoxicillin-Clavulanate Potass23 claims
- Doxycycline Hyclate21 claims
- Prednisone21 claims
- Azithromycin20 claims
- Cephalexin20 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Andrea Leigh Warren among 7,639 family nurse practitioner records in Illinois
Andrea Leigh Warren, APRN, FNP is one of 7,639 family nurse practitioner records with a practice address in Illinois. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 24% of them.
- NPI issued2015 · 24% of these records are older, 70% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2009 · median 2018 among the 4,778 with a school on file
- Record last updated2025 · 39% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
93 family nurse practitioner records list a practice address in Oak Lawn
They are 93 of the 2,993 NPPES records with a practice address in Oak Lawn, and 7,639 family nurse practitioner records in Illinois.
All 7,639 in Illinois → Every provider in Oak Lawn → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Kelly Billingsley, NPOak Lawn, IL 604531063761724
- Leah Burns, APN, FNPOak Lawn, IL 604531548509110
- Kelly Canerday, FNP-BCOak Lawn, IL 604531952744963
- Jeanne Dougherty, APNOak Lawn, IL 604531598872368
- Jane Flanagan, APNOak Lawn, IL 604531770779522
- Linda Follenweider, NPOak Lawn, IL 604531740228584
- Lisa Guzman, NPOak Lawn, IL 604531790886257
- Amy Hansen, FNPOak Lawn, IL 604531629491543
Common questions
What is Andrea Leigh Warren, APRN, FNP's NPI number?
Andrea Leigh Warren, APRN, FNP's National Provider Identifier (NPI) is 1427423367, issued on Dec 3, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Andrea Leigh Warren, APRN, FNP located?
The NPPES record lists a practice address at 9555 S 52ND Ave, Oak Lawn, IL, 60453. Phone: (708) 634-0950. Providers update this record themselves, so call before visiting.
How can I verify Andrea Leigh Warren, APRN, FNP's license?
NPPES lists Illinois license number 277003944, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.
How much does Andrea Leigh Warren, APRN, FNP prescribe under Medicare Part D?
In 2024, Andrea Leigh Warren, APRN, FNP had 348 Medicare Part D claims for 233 beneficiaries; the average among family nurse practitioner prescribers was 1,305. Part D covers Medicare prescriptions 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.
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.