Margaret A. Johnstone, RN NP
Psychiatric/Mental Health Nurse Practitioner · Concord, CA
Margaret A. Johnstone, RN NP is a psychiatric/mental health nurse practitioner with a practice address in Concord, California, and NPI 1134229347, issued on Sep 25, 2006. Check the license (California 14501, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Margaret A. Johnstone
- Credential
- RN NP
- Primary taxonomy
- Psychiatric/Mental Health Nurse Practitioner 363LP0808X
- License number
- 14501 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2740 Grant St, Concord, CA 94520
- Phone
- (925) 285-5431
- Enumerated
- Sep 25, 2006
- Record last updated
- Apr 30, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (925) 847-5599
- Entity
- Type 1 · individual
8 nearest psychiatric/mental health nurse practitioner records → All 4,226 in California → Look up another NPI →
Also registered at 2740 Grant St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Luda Braginsky, NPMental Health Counselor1760645402
- Doris Campbell, FNP, MSNFamily Nurse Practitioner1275768012
- Arman Danielyan, MDPsychiatry Physician1306035050
- Sonia Gomez, N.P.Psychiatric/Mental Health Nurse Practitioner1013929066
- Berenise Gomez VargasRegistered Dietitian1376200311
- Kiran Koka, M.D.Child & Adolescent Psychiatry Physician1952411274
Verify Margaret A. Johnstone in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 14501Check 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 psychiatric/mental health nurse practitioner in 2024
28 Medicare Part D claims, against an average of 906 among the 30,717 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Buspirone Hcl13 claims
- Escitalopram Oxalate11 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 A. Johnstone among 4,226 psychiatric/mental health nurse practitioner records in California
Margaret A. Johnstone, RN NP 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 2006, is newer than under 1% of them.
- NPI issued2006 · under 1% of these records are older, 96% newer
- In a Medicare fileYes · 62% of these records are
- In the CMS Doctors and Clinicians fileNo · 46% of these records are
- Record last updated2013 · 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 Concord → Psychiatric/Mental Health Nurse Practitioner nationwide →
The 8 psychiatric/mental health nurse practitioner records with the nearest ZIP codes
- Adam Danko, N.P.Concord, CA 945201821392846
- Michael Dionne, PMHNP-BCConcord, CA 945201336035666
- Sonia Gomez, N.P.Concord, CA 945201013929066
- Gulshan Grewal, NPConcord, CA 945201043147234
- Matthew Kubasta, NURSE PRACTITIONERConcord, CA 945201063985455
- Olukemi Kuku, DNP, PMHNPConcord, CA 945201114417854
- Sonya Lakha, RNConcord, CA 945201689075251
- Jin LeeConcord, CA 945201306164231
Common questions
What is Margaret A. Johnstone, RN NP's NPI number?
Margaret A. Johnstone, RN NP's National Provider Identifier (NPI) is 1134229347, issued on Sep 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Margaret A. Johnstone, RN NP located?
The NPPES record lists a practice address at 2740 Grant St, Concord, CA, 94520. Phone: (925) 285-5431. Providers update this record themselves, so call before visiting.
How can I verify Margaret A. Johnstone, RN NP's license?
NPPES lists California license number 14501, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Margaret A. Johnstone, RN NP prescribe under Medicare Part D?
In 2024, Margaret A. Johnstone, RN NP had 28 Medicare Part D claims; 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.