Mary Dahilig, APN, FNP-BC
Nurse Practitioner · Chicago, IL
Mary Dahilig, APN, FNP-BC is a nurse practitioner with a practice address in Chicago, Illinois, and NPI 1225314990, issued on Oct 26, 2011. Check the license (Illinois 277003870, as entered in NPPES) with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mary Dahilig
- Credential
- APN, FNP-BC
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License numbers
- 277003870 IL
209009165 IL
Self-reported in NPPES; status is on the state search - Practice location
- 20 S Clark St FL 11, Chicago, IL 60603
- Phone
- (312) 926-3627
- Enumerated
- Oct 26, 2011
- Entity
- Type 1 · individual
Also registered at 20 S Clark St FL 11
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mary Dahilig in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Illinois board licenses this profession
Search for license 277003870Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
97% fewer Medicare Part D claims than the average nurse practitioner in 2024
38 Medicare Part D claims for 35 beneficiaries, against an average of 1,144 among the 50,277 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Amoxicillin-Clavulanate Potass14 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.
One hospital or facility affiliation
- Northwestern Medical Faculty FoundationChicago, IL
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
742 nurse practitioner records list a Chicago practice address
They are 742 of the 63,379 NPPES records with a Chicago practice address, and 4,005 nurse practitioner records in Illinois.
All 742 in Chicago → All 4,005 in Illinois → Every provider in Chicago →
Other nurse practitioner records in Illinois
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- Edwina Abloh, APN-CNPSkokie, IL1689314098
- Sandra Abraham, CNPDwight, IL1982883245
- Hazel Acacio, APNPWauconda, IL1205471679
- Anthony Aceto, APRN, FNP-CSchaumburg, IL1891302956
- Francisco Acevedo, APRN, CNPMokena, IL1467446930
- Ijeoma Achebe, FNPChicago, IL1013498294
Common questions
What is Mary Dahilig, APN, FNP-BC's NPI number?
Mary Dahilig, APN, FNP-BC's National Provider Identifier (NPI) is 1225314990, issued on Oct 26, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Mary Dahilig, APN, FNP-BC located?
The NPPES record lists a practice address at 20 S Clark St FL 11, Chicago, IL, 60603. Phone: (312) 926-3627. Providers update this record themselves, so call before visiting.
How can I verify Mary Dahilig, APN, FNP-BC's license?
NPPES lists Illinois license number 277003870, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.
How much does Mary Dahilig, APN, FNP-BC prescribe under Medicare Part D?
In 2024, Mary Dahilig, APN, FNP-BC had 38 Medicare Part D claims for 35 beneficiaries; the average among nurse practitioner prescribers was 1,144. Part D covers Medicare prescriptions only.
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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.