Margaret Emily Johnston, NP
Nurse Practitioner · Altadena, CA
Margaret Emily Johnston, NP is a nurse practitioner with a practice address in Altadena, California, and NPI 1225280548, issued on Oct 17, 2008. Check the license (California NP8747, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Margaret Emily Johnston
- Credential
- NP
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License number
- NP8747 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2549 Morslay RD., Altadena, CA 91001
- Phone
- (626) 794-6062
- Enumerated
- Oct 17, 2008
- Record last updated
- Oct 17, 2008 (not updated in 18 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
Verify Margaret Emily Johnston in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license NP8747Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.6 times the Medicare Part D claims of the average nurse practitioner in 2024
2,933 Medicare Part D claims for 180 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 28 claims were for opioids.
Most prescribed
- Atorvastatin Calcium222 claims
- Losartan Potassium210 claims
- Amlodipine Besylate159 claims
- Omeprazole151 claims
- Gabapentin150 claims
- Metformin Hcl147 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.
Nurse Practitioner providers in California
There are 8,223 nurse practitioner records in California.
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Common questions
What is Margaret Emily Johnston, NP's NPI number?
Margaret Emily Johnston, NP's National Provider Identifier (NPI) is 1225280548, issued on Oct 17, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Margaret Emily Johnston, NP located?
The NPPES record lists a practice address at 2549 Morslay RD., Altadena, CA, 91001. Phone: (626) 794-6062. Providers update this record themselves, so call before visiting.
How can I verify Margaret Emily Johnston, NP's license?
NPPES lists California license number NP8747, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Margaret Emily Johnston, NP prescribe under Medicare Part D?
In 2024, Margaret Emily Johnston, NP had 2,933 Medicare Part D claims for 180 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.