NPPES file of Aug 9, 2026

Colleen M. Grandowski, ACNP

Nurse Practitioner · Mokena, IL

Colleen M. Grandowski, ACNP is a nurse practitioner with a practice address in Mokena, Illinois, and NPI 1265768352, issued on Oct 23, 2009. Check the license (Illinois 277000793, 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 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1265768352
Name
Colleen M. Grandowski
Credential
ACNP
Primary taxonomy
Nurse Practitioner 363L00000X
License numbers
277000793 IL
209007785 IL
Self-reported in NPPES; status is on the state search
Practice location
21202 Owens RD Ste 101, Mokena, IL 60448
Phone
(779) 334-0030
Enumerated
Oct 23, 2009
Record last updated
Jan 17, 2022
Fax
(779) 334-0031
Medicare enrollment
Enrolled (PECOS I20100109000163); accepts Medicare assignment
Medical or professional school
Loyola University Of Chicago, Stritch School Of Medicine, 2009
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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Also registered at 21202 Owens RD Ste 101

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Francisco Acevedo, APRN, CNPNurse Practitioner1467446930
  2. Jessica Bara, APRN, CNPNurse Practitioner1457698961
  3. Nichole Dimaria, FNPNurse Practitioner1336675610
  4. Amber Drobney, FNP-BCNurse Practitioner1801289871
  5. Nicole Fitzgerald, FNP-BCNurse Practitioner1174012454
  6. Ashley Gomulka, APRN, FNP-BCNurse Practitioner1760097604

Verify Colleen M. Grandowski 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 277000793    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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83% fewer Medicare Part D claims than the average nurse practitioner in 2024

192 Medicare Part D claims for 75 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D.

  1. Colleen Grandowski192
  2. Specialty average1,109

Most prescribed

  1. Meloxicam44 claims
  2. Atorvastatin Calcium16 claims
  3. Ibuprofen14 claims
  4. Pantoprazole Sodium13 claims
  5. Naproxen12 claims
  6. Clopidogrel11 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.

Bills Medicare through 2 group practices

  1. Mount Sinai Community FoundationChicago, IL
  2. Prime Healthcare Illinois Medical Group LLCJoliet, IL

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

25 nurse practitioner records list a practice address in Mokena

They are 25 of the 523 NPPES records with a practice address in Mokena, and 4,892 nurse practitioner records in Illinois.

All 25 in Mokena → All 4,892 in Illinois → Every provider in Mokena →

Other nurse practitioner records in Illinois

  1. Janice Abadilla, FNP-BCPeoria, IL1548157175
  2. Philomena AbebePark Ridge, IL1902780174
  3. Milagros Abellera, APNChicago, IL1528076239
  4. Edwina Abloh, APN-CNPSkokie, IL1689314098
  5. Sandra Abraham, CNPDwight, IL1982883245
  6. Sharon Abraham, APN-CNPArlington Heights, IL1396485884
  7. Hazel Acacio, APNPWauconda, IL1205471679
  8. Anthony Aceto, APRN, FNP-CSchaumburg, IL1891302956
  9. Francisco Acevedo, APRN, CNPMokena, IL1467446930
  10. Mina Acevedo, APRNGlenview, IL1972174688

Common questions

What is Colleen M. Grandowski, ACNP's NPI number?

Colleen M. Grandowski, ACNP's National Provider Identifier (NPI) is 1265768352, issued on Oct 23, 2009. An NPI identifies a provider in billing; it is not a license.

Where is Colleen M. Grandowski, ACNP located?

The NPPES record lists a practice address at 21202 Owens RD Ste 101, Mokena, IL, 60448. Phone: (779) 334-0030. Providers update this record themselves, so call before visiting.

How can I verify Colleen M. Grandowski, ACNP's license?

NPPES lists Illinois license number 277000793, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.

How much does Colleen M. Grandowski, ACNP prescribe under Medicare Part D?

In 2024, Colleen M. Grandowski, ACNP had 192 Medicare Part D claims for 75 beneficiaries; the average among nurse practitioner prescribers was 1,109. 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.

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.