Dr. Matthew Stanley Johnson, MD
- Part D claims, 2024
- 28
- Hospital affiliations
- 2
- Industry payments
- $303
- Medical group
- 1
- Insurance carriers
- 2
- Practice address
- 2051 Marengo St, Room C2K100, Los Angeles, CA 90033
- Practice phone
- Call (323) 226-2800
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Johnson'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.
Dr. Matthew Stanley Johnson is a hospitalist in Los Angeles, California
Dr. Johnson practices at Los Angeles General Medical Center in Los Angeles, California, part of County of Los Angeles.
Dr. Johnson's NPI, 1043598741, was assigned on July 28, 2011. Dr. Johnson graduated from Keck School of Medicine of USC in 1944. Dr. Johnson's California license number on file is A117704.
- NPI
- 1043598741NPI Registry (opens in a new tab)
- NPI enumeration date
- July 28, 2011
- NPI status
- Active
- Practice phone
- (323) 226-2800
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1944
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Matthew Stanley Johnson practices at Los Angeles General Medical Center in Los Angeles, California
Dr. Johnson's primary practice is Los Angeles General Medical Center, at 2051 Marengo St, Room C2K100, Los Angeles, CA 90033 in Los Angeles County. The practice phone is (323) 226-2800.
- Los Angeles General Medical Center2051 Marengo St, Room C2K100, Los Angeles, CA 90033 · Los Angeles CountyPhone(323) 226-2800
Source: Dmand AI Affiliation Data
Dr. Matthew Stanley Johnson is affiliated with 2 sites of care and 1 medical group
Dr. Johnson's primary practice is Los Angeles General Medical Center in Los Angeles, California, part of County of Los Angeles. Dr. Johnson is also affiliated with Keck Hospital of USC. The medical group on file is USC Care Medical Group. Dr. Johnson's employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Matthew Stanley Johnson's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Johnson practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Los Angeles General Medical 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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Dr. Matthew Stanley Johnson is one of 3,186 hospitalists in California
Hospitalist is Dr. Johnson's primary specialty in the NPI Registry, under taxonomy code 208M00000X. Dr. Johnson is board certified in internal medicine by the American Board of Internal Medicine. Dr. Johnson has a license on file in California.
Specialties and state licenses
- Hospitalist, CaliforniaPrimary
Clinical focus
Dmand AI lists seizures, sepsis and syncope & collapse among the conditions Dr. Johnson treats.
Hospitalists near Dr. Johnson
Counts of hospitalists 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
Dr. Matthew Stanley Johnson's patients have a median age of 60
Across all payers, Dmand AI patient panel data puts Dr. Johnson's median patient age at 60, with 40% women.
Dr. Johnson's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 60
Patient panel by sex, all payers
- Women40%
- Men60%
Source: Dmand AI Patient Panel Data
Dr. Matthew Stanley Johnson wrote 28 Medicare Part D claims in 2024
In 2024, Dr. Johnson wrote 28 Medicare Part D claims. 86% of them were for generic drugs. They cover 10 drugs, with $5,211 in total drug cost.
Dr. Johnson's Part D claims by kind of drug, 2024
- Generic24 claims86%
- Brand-name and other4 claims14%
Dr. Johnson's most prescribed drugs by claims, 2016
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
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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Dr. Matthew Stanley Johnson received $303 in industry payments from 2016 to 2025
CMS Open Payments shows 13 general payments to Dr. Johnson from 4 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Allergan Inc. paid the most, $136.
General payments to Dr. Johnson by program year, 2016 to 2025
Companies that paid Dr. Johnson the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Matthew Stanley Johnson graduated from Keck School of Medicine of USC
Dr. Johnson graduated from Keck School of Medicine of USC in 1944.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Matthew Stanley Johnson accepts plans from 2 insurance carriers
Dr. Johnson is in network with 2 carriers, including Elevance and Blue Cross Blue Shield of Michigan. HMO plans come from the most carriers, 2. Check the plan with the practice before a visit.
- Elevance
- Blue Cross Blue Shield of Michigan
Plan types Dr. Johnson accepts, by number of carriers
- HMO2
- POS2
- PPO2
- EPO1
- Medicare1
Source: Dmand AI Insurance Network Data
Sources for Dr. Matthew Stanley Johnson'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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| 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 Dr. Matthew Stanley Johnson
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Matthew Stanley Johnson's NPI number?
Dr. Matthew Stanley Johnson's NPI number is 1043598741. It was assigned on July 28, 2011, and it is active in the NPI Registry.
What kind of doctor is Dr. Matthew Stanley Johnson?
Dr. Matthew Stanley Johnson is a hospitalist in Los Angeles, California. The primary specialty in the NPI Registry is Hospitalist Physician (taxonomy code 208M00000X).
Where does Dr. Matthew Stanley Johnson practice?
Dr. Johnson practices at 2051 Marengo St, Room C2K100, Los Angeles, CA 90033. Dr. Johnson's primary practice is Los Angeles General Medical Center in Los Angeles, California, part of County of Los Angeles.
What is Dr. Matthew Stanley Johnson's office phone number?
The practice phone on file for Dr. Johnson is (323) 226-2800.
What is Dr. Matthew Stanley Johnson's medical license number?
Dr. Johnson's California license number on file is A117704.
Which hospitals is Dr. Matthew Stanley Johnson affiliated with?
Dr. Johnson practices at Los Angeles General Medical Center in Los Angeles, California. Dr. Johnson is also affiliated with Keck Hospital of USC.
What medical group is Dr. Matthew Stanley Johnson part of?
Dr. Johnson is linked to USC Care Medical Group.
Is Dr. Matthew Stanley Johnson board certified?
Yes. Dr. Johnson is board certified in internal medicine by the American Board of Internal Medicine.
Where did Dr. Matthew Stanley Johnson go to medical school?
Dr. Johnson graduated from Keck School of Medicine of USC in 1944.
What drugs does Dr. Matthew Stanley Johnson prescribe most?
In 2016 Medicare Part D data, Dr. Johnson's most prescribed drugs by claims were Metformin HCl, Amlodipine Besylate and Atorvastatin Calcium.
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Has Dr. Matthew Stanley Johnson received payments from drug or device companies?
CMS Open Payments shows $303 in general payments to Dr. Johnson from 4 companies from 2016 to 2025. The largest total came from Allergan Inc.
How long has Dr. Matthew Stanley Johnson been practicing?
Dr. Johnson graduated from medical school in 1944, 82 years ago.
What insurance does Dr. Matthew Stanley Johnson accept?
Dr. Johnson is in network with 2 carriers, including Elevance and Blue Cross Blue Shield of Michigan. HMO plans come from the most carriers, 2. Check the plan with the practice before a visit.
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