Dr. Marion S. Johnson, MD
- Medicare services, 2021
- 41
- Part D claims, 2024
- 242
- Hospital affiliations
- 1
- Industry payments
- $5,630
- Medical group
- 1
- Practice address
- 1225 Wilshire Boulevard, Los Angeles, CA 90017
- Practice phone
- Call (213) 977-2121
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. Marion S. Johnson is an allergy physician in Los Angeles, California
Dr. Johnson practices at PIH Health Good Samaritan Hospital in Los Angeles, California, part of PIH Health.
Dr. Johnson's NPI, 1952523086, was assigned on May 2, 2007. Dr. Johnson graduated from University of California, San Francisco School of Medicine in 1978. Dr. Johnson holds California license G40087.
- NPI
- 1952523086NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3375509003
- NPI enumeration date
- May 2, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (213) 977-2121
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 74
- Medical school graduation
- 1978
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Marion S. Johnson practices at PIH Health Good Samaritan Hospital in Los Angeles, California
Dr. Johnson's primary practice is PIH Health Good Samaritan Hospital, at 1225 Wilshire Boulevard, Los Angeles, CA 90017 in Los Angeles County. The practice phone is (213) 977-2121.
- PIH Health Good Samaritan Hospital1225 Wilshire Boulevard, Los Angeles, CA 90017 · Los Angeles CountyPhone(213) 977-2121
Source: Dmand AI Affiliation Data
Dr. Marion S. Johnson is affiliated with 1 site of care and 1 medical group
Dr. Johnson's primary practice is PIH Health Good Samaritan Hospital in Los Angeles, California, part of PIH Health. The medical group on file is UC Davis Medical Group.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Marion S. Johnson's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Johnson practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| PIH Health Good Samaritan Hospital | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Marion S. Johnson is one of 136 allergy physicians in California
Allergy is Dr. Johnson's primary specialty in the NPI Registry, under taxonomy code 207KA0200X. Dr. Johnson is licensed in California.
Specialties and state licenses
- Allergy, CaliforniaPrimary
Allergy physicians near Dr. Johnson
Counts of allergy physicians 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. Marion S. Johnson billed Medicare for 41 services in 2021
CMS data shows 41 Medicare services from Dr. Johnson across 2 procedure codes in 2021, all of them office visits. Medicare paid $3,538 for them. Every service was in an office.
Dr. Johnson's Medicare services by type, 2019 to 2021
- 2019
- 2021
- Office and hospital visits
- 2019: 212021: 4195%
Dr. Johnson compared with the California median for allergy physicians, 2021
- Dr. Johnson
- California median
- Medicare services
- 41vs 2,33498% below
- Part D claims
- 102vs 21553% below
Medians across 123 allergy physicians in California with Dmand AI profiles that report each measure.
Dr. Johnson's most billed Medicare procedure codes, 2021
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Marion S. Johnson's patients have a median age of 57
Across all payers, Dmand AI patient panel data puts Dr. Johnson's median patient age at 57, with 62% 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 57
Patient panel by sex, all payers
- Women62%
- Men35%
Source: Dmand AI Patient Panel Data
Dr. Marion S. Johnson wrote 242 Medicare Part D claims in 2024
In 2024, Dr. Johnson wrote 242 Medicare Part D claims for 71 patients. 67% of them were for generic drugs. CMS names the drug for 102 of them, across 5 drugs with 11 or more claims each, at $3,525 in total drug cost. In 2023, CMS named 86 claims across 5 drugs.
Dr. Johnson's Part D claims by kind of drug, 2024
- Generic163 claims67%
- Brand-name79 claims33%
Dr. Johnson'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 Dr. Johnson's Part D claims, 2024
- Antibiotics5%11 of 242 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 862024: 10219%
Drugs named by CMS: 5 in 2024, 5 in 2023.
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
Dr. Marion S. Johnson offers telehealth to Medicare patients
Dr. Johnson accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Johnson as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Marion S. Johnson received $5,630 in industry payments from 2016 to 2025
CMS Open Payments shows 195 general payments to Dr. Johnson from 27 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 99% of the total. GlaxoSmithKline, LLC. paid the most, $899.
General payments to Dr. Johnson by program year, 2016 to 2025
General payments to Dr. Johnson by kind, 2016 to 2025
- Food and beverage$5,59299%
- Education$381%
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. Marion S. Johnson graduated from University of California, San Francisco School of Medicine
Dr. Johnson graduated from University of California, San Francisco School of Medicine in 1978.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Marion S. 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 services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (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 |
| 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. Marion S. 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. Marion S. Johnson's NPI number?
Dr. Marion S. Johnson's NPI number is 1952523086. It was assigned on May 2, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Marion S. Johnson?
Dr. Marion S. Johnson is an allergy physician in Los Angeles, California. The primary specialty in the NPI Registry is Allergy Physician (taxonomy code 207KA0200X).
Where does Dr. Marion S. Johnson practice?
Dr. Johnson practices at 1225 Wilshire Boulevard, Los Angeles, CA 90017. Dr. Johnson's primary practice is PIH Health Good Samaritan Hospital in Los Angeles, California, part of PIH Health.
What is Dr. Marion S. Johnson's office phone number?
The practice phone on file for Dr. Johnson is (213) 977-2121.
What is Dr. Marion S. Johnson's medical license number?
Dr. Johnson holds California license G40087.
Which hospitals is Dr. Marion S. Johnson affiliated with?
Dr. Johnson practices at PIH Health Good Samaritan Hospital in Los Angeles, California.
What medical group is Dr. Marion S. Johnson part of?
Dr. Johnson is linked to UC Davis Medical Group.
Does Dr. Marion S. Johnson accept Medicare?
Yes. CMS data shows Dr. Johnson billed Medicare for 41 services in 2021, and Dr. Johnson accepts Medicare assignment.
Does Dr. Marion S. Johnson offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Johnson as offering telehealth services.
What services does Dr. Marion S. Johnson bill to Medicare?
In 2021, Dr. Johnson's most billed Medicare services were office visit, established patient (99213) and office visit, new patient (99203).
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Where did Dr. Marion S. Johnson go to medical school?
Dr. Johnson graduated from University of California, San Francisco School of Medicine in 1978.
What drugs does Dr. Marion S. Johnson prescribe most?
In 2024 Medicare Part D data, Dr. Johnson's most prescribed drugs by claims were Azelastine HCl, Levocetirizine Dihydrochloride and Albuterol Sulfate Hfa.
Has Dr. Marion S. Johnson received payments from drug or device companies?
CMS Open Payments shows $5,630 in general payments to Dr. Johnson from 27 companies from 2016 to 2025. The largest total came from GlaxoSmithKline, LLC.
How long has Dr. Marion S. Johnson been practicing?
Dr. Johnson graduated from medical school in 1978, 48 years ago.
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