Margaret M. Gaynor, APRN, CNP
Nurse Practitioner · McHenry, IL
Margaret M. Gaynor, APRN, CNP is a nurse practitioner with a practice address in McHenry, Illinois, and NPI 1164890869, issued on Sep 11, 2015. Check the license (Illinois 209013236, as entered in NPPES) with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Margaret M. Gaynor
- Credential
- APRN, CNP
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License numbers
- 209013236 IL
041.256894 IL
Self-reported in NPPES; status is on the state search - Practice location
- 4309 W Medical Center Dr Ste B301, McHenry, IL 60050
- Phone
- (847) 802-7400
- Enumerated
- Sep 11, 2015
- Record last updated
- Sep 5, 2024
- Fax
- (815) 759-4375
- Medicare enrollment
- Enrolled (PECOS I20151020001640); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest nurse practitioner records → All 4,892 in Illinois → Look up another NPI →
Also registered at 4309 W Medical Center Dr Ste B301
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Fernanda Jacobs, DNP, APRN, AGACNP-BCNurse Practitioner1730962580
- Salman Ali Khan, MDGastroenterology Physician1306253349
Verify Margaret M. Gaynor in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Illinois board licenses this profession
Search for license 209013236Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
57% fewer Medicare Part D claims than the average nurse practitioner in 2024
474 Medicare Part D claims for 164 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D. Brand-name drugs were 62% of claims.
Most prescribed
- Albuterol Sulfate Hfa70 claims
- Trelegy Ellipta60 claims
- Prednisone44 claims
- Breo Ellipta40 claims
- Azithromycin37 claims
- Anoro Ellipta29 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.
Industry payments in 2024: $2,434.88
9 payments; by number, the most common kind was travel and lodging; the largest payer was Intuitive Surgical, Inc. The 38,884 providers of this specialty with any payment received $791.64 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Northwestern Medical Faculty FoundationLake Forest, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Margaret M. Gaynor among 4,892 nurse practitioner records in Illinois
Margaret M. Gaynor, APRN, CNP 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 2015, is newer than 31% of them.
- NPI issued2015 · 31% of these records are older, 64% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2015 · median 2018 among the 3,389 with a school on file
- Record last updated2024 · 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).
42 nurse practitioner records list a practice address in McHenry
They are 42 of the 1,852 NPPES records with a practice address in McHenry, and 4,892 nurse practitioner records in Illinois.
All 4,892 in Illinois → Every provider in McHenry → Nurse Practitioner nationwide →
The 8 nurse practitioner records with the nearest ZIP codes
- Glenda Fragante, NP-CMcHenry, IL 600501649686916
- Diane Glick, APN-CNPMcHenry, IL 600501184979544
- Jana Goodall, APRN, CNPMcHenry, IL 600501255733010
- Sarah Greenaway, APRN, CNPMcHenry, IL 600501962865626
- Faye Kopplin, N.PMcHenry, IL 600501568588150
- Elizabeth Marcinek, APRN, CNPMcHenry, IL 600501467827907
- Louina Molina, APRN, APNP-FMcHenry, IL 600501699164897
- Magaly Nickles, APNMcHenry, IL 600501033543129
Common questions
What is Margaret M. Gaynor, APRN, CNP's NPI number?
Margaret M. Gaynor, APRN, CNP's National Provider Identifier (NPI) is 1164890869, issued on Sep 11, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Margaret M. Gaynor, APRN, CNP located?
The NPPES record lists a practice address at 4309 W Medical Center Dr Ste B301, McHenry, IL, 60050. Phone: (847) 802-7400. Providers update this record themselves, so call before visiting.
How can I verify Margaret M. Gaynor, APRN, CNP's license?
NPPES lists Illinois license number 209013236, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.
How much does Margaret M. Gaynor, APRN, CNP prescribe under Medicare Part D?
In 2024, Margaret M. Gaynor, APRN, CNP had 474 Medicare Part D claims for 164 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.
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.