Margaret Louise McIlroy, DNP APRN CNM PMHNP
Psychiatric/Mental Health Nurse Practitioner · Lancaster, CA
Margaret Louise McIlroy, DNP APRN CNM PMHNP is a psychiatric/mental health nurse practitioner with a practice address in Lancaster, California, and NPI 1033444161, issued on Oct 7, 2009. Check the license (California 12066, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Margaret Louise McIlroy
- Credential
- DNP APRN CNM PMHNP
- Primary taxonomy
- Psychiatric/Mental Health Nurse Practitioner 363LP0808X
- License numbers
- 12066 CA
NM1446 CA
Self-reported in NPPES; status is on the state search - Practice location
- 506 W Jackman St, Lancaster, CA 93534
- Phone
- (661) 726-2850
- Enumerated
- Oct 7, 2009
- Record last updated
- Aug 21, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (661) 726-2854
- Entity
- Type 1 · individual
8 nearest psychiatric/mental health nurse practitioner records → All 4,226 in California → Look up another NPI →
Also registered at 506 W Jackman St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sara AbbottDay Training/Habilitation Specialist1760363550
- Angelina AcostaCommunity Health Worker1891403283
- Dana AdoptanteRehabilitation Practitioner1386916997
- Rubi AguilarDay Training/Habilitation Specialist1962280016
- Monique Aguirre RamosDay Training/Habilitation Specialist1013733997
- Lisa AlarconCase Manager/Care Coordinator1457699126
Verify Margaret Louise McIlroy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 12066Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
42% fewer Medicare Part D claims than the average psychiatric/mental health nurse practitioner in 2024
526 Medicare Part D claims for 25 beneficiaries, against an average of 906 among the 30,717 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims.
Most prescribed
- Clonazepam41 claims
- Bupropion Xl36 claims
- Escitalopram Oxalate33 claims
- Trazodone Hcl33 claims
- Dextroamphetamine-Amphetamine32 claims
- Alprazolam31 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.
Margaret Louise McIlroy among 4,226 psychiatric/mental health nurse practitioner records in California
Margaret Louise McIlroy, DNP APRN CNM PMHNP is one of 4,226 psychiatric/mental health nurse practitioner records with a practice address in California. 62% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 9% of them.
- NPI issued2009 · 9% of these records are older, 90% newer
- In a Medicare fileYes · 62% of these records are
- In the CMS Doctors and Clinicians fileNo · 46% of these records are
- Record last updated2018 · 16% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LP0808X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Psychiatric/Mental Health Nurse Practitioner providers in California
There are 4,226 psychiatric/mental health nurse practitioner records in California.
All 4,226 in California → Every provider in Lancaster → Psychiatric/Mental Health Nurse Practitioner nationwide →
The 8 psychiatric/mental health nurse practitioner records with the nearest ZIP codes
- Omorogiuwa Adeneye, PMHNPLancaster, CA 935341770271280
- Josephine Aideloje, NPLancaster, CA 935341790272243
- Wendy ColochoLancaster, CA 935341407625643
- Linh DangLancaster, CA 935341326654815
- Porsha Gray, PMHNP-BCLancaster, CA 935341346981750
- Lakeshia Mason, PMHNP-BCLancaster, CA 935341740096189
- Daniel Acebedo, NPLancaster, CA 935351891133872
- Jose AlegarbesLancaster, CA 935351801478417
Common questions
What is Margaret Louise McIlroy, DNP APRN CNM PMHNP's NPI number?
Margaret Louise McIlroy, DNP APRN CNM PMHNP's National Provider Identifier (NPI) is 1033444161, issued on Oct 7, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Margaret Louise McIlroy, DNP APRN CNM PMHNP located?
The NPPES record lists a practice address at 506 W Jackman St, Lancaster, CA, 93534. Phone: (661) 726-2850. Providers update this record themselves, so call before visiting.
How can I verify Margaret Louise McIlroy, DNP APRN CNM PMHNP's license?
NPPES lists California license number 12066, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Margaret Louise McIlroy, DNP APRN CNM PMHNP prescribe under Medicare Part D?
In 2024, Margaret Louise McIlroy, DNP APRN CNM PMHNP had 526 Medicare Part D claims for 25 beneficiaries; the average among psychiatric/mental health nurse practitioner prescribers was 906. 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.