Margaret Emily Johnston, NP
- Part D claims, 2024
- 2,933
- Affiliated sites
- 2
- State license
- 1
- Year NPI issued
- 2008
- Practice address
- 5850 S Main St, Los Angeles, CA 90003
- Practice phone
- Call (323) 846-4265
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Hubert H. Humphrey Comprehensive Health Center
Urgent Care Center · Los Angeles, California
Find Margaret Johnston's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Margaret Emily Johnston is a nurse practitioner in Los Angeles, California
Margaret Johnston practices at Hubert H. Humphrey Comprehensive Health Center in Los Angeles, California.
Margaret Johnston's NPI, 1225280548, was assigned on October 17, 2008. Margaret Johnston holds California license NP8747.
- NPI
- 1225280548NPI Registry (opens in a new tab)
- NPI enumeration date
- October 17, 2008
- NPI status
- Active
- Practice phone
- (323) 846-4265
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Margaret Emily Johnston practices at Hubert H. Humphrey Comprehensive Health Center in Los Angeles, California
Margaret Johnston's primary practice is Hubert H. Humphrey Comprehensive Health Center, at 5850 S Main St, Los Angeles, CA 90003. The practice phone is (323) 846-4265.
- Hubert H. Humphrey Comprehensive Health Center5850 S Main St, Los Angeles, CA 90003Phone(323) 846-4265
Source: Dmand AI Affiliation Data
Margaret Emily Johnston is affiliated with 2 sites of care
Margaret Johnston's primary practice is Hubert H. Humphrey Comprehensive Health Center in Los Angeles, California. Dmand AI also links Margaret Johnston to 1 breast imaging center, named with a free account. Margaret Johnston's employer is on file too: an urgent care center.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Margaret Emily Johnston's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Margaret Johnston practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Hubert H. Humphrey Comprehensive Health Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Margaret Emily Johnston is one of 5,983 nurse practitioners in California
Nurse practitioner is Margaret Johnston's primary specialty in the NPI Registry, under taxonomy code 363L00000X. Margaret Johnston is licensed in California.
Specialties and state licenses
- Nurse practitioner, CaliforniaPrimary
Nurse practitioners near Margaret Johnston
Counts of nurse practitioners with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Margaret Emily Johnston's patients have a median age of 59
Across all payers, Dmand AI patient panel data puts Margaret Johnston's median patient age at 59, with 67% women.
Margaret Johnston's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 59
Patient panel by sex, all payers
- Women67%
- Men33%
Source: Dmand AI Patient Panel Data
Margaret Emily Johnston wrote 2,933 Medicare Part D claims in 2024
In 2024, Margaret Johnston wrote 2,933 Medicare Part D claims for 180 patients. 87% of them were for generic drugs. CMS names the drug for 2,559 of them, across 55 drugs with 11 or more claims each, at $98,576 in total drug cost.
Margaret Johnston's Part D claims by kind of drug, 2024
- Generic2,557 claims87%
- Brand-name354 claims12%
- Other22 claims1%
Margaret Johnston's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Margaret Johnston's Part D claims, 2024
- Opioids1%28 of 2,933 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Sources for Margaret Emily Johnston's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Margaret Emily Johnston
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Margaret Emily Johnston's NPI number?
Margaret Emily Johnston's NPI number is 1225280548. It was assigned on October 17, 2008, and it is active in the NPI Registry.
What does Margaret Emily Johnston specialize in?
Margaret Emily Johnston is a nurse practitioner in Los Angeles, California. The primary specialty in the NPI Registry is Nurse Practitioner (taxonomy code 363L00000X).
Where does Margaret Emily Johnston practice?
Margaret Johnston practices at 5850 S Main St, Los Angeles, CA 90003. Margaret Johnston's primary practice is Hubert H. Humphrey Comprehensive Health Center in Los Angeles, California. Dmand AI also links Margaret Johnston to 1 breast imaging center.
What is Margaret Emily Johnston's office phone number?
The practice phone on file for Margaret Johnston is (323) 846-4265.
What is Margaret Emily Johnston's medical license number?
Margaret Johnston holds California license NP8747.
What drugs does Margaret Emily Johnston prescribe most?
In 2024 Medicare Part D data, Margaret Johnston's most prescribed drugs by claims were Atorvastatin Calcium, Losartan Potassium and Amlodipine Besylate.
How long has Margaret Emily Johnston been practicing?
Margaret Johnston's NPI was assigned in 2008.
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