BrainCognitionGenetic Loci
Dr. Robert Allen Johnson, MD
NPI1518138098
- Part D claims, 2021
- 973
- Publications
- 1
- Industry payments
- $89
- State licenses
- 3
- Year NPI issued
- 2008
- Practice address
- CA
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
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. Robert Allen Johnson is a psychiatrist in California
Dr. Johnson practices in California.
Dr. Johnson's NPI, 1518138098, was assigned on March 12, 2008. Dr. Johnson graduated from University Of Minnesota Medical School in 1977. Dr. Johnson's California license number on file is G42325.
NPI and contact details
- NPI
- 1518138098NPI Registry (opens in a new tab)
- NPI enumeration date
- March 12, 2008
- NPI status
- Active
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Medical school graduation
- 1977
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dmand AI tracks the EHR system at Dr. Robert Allen 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 |
|---|---|
| Dr. Johnson's practice | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Robert Allen Johnson is one of 6,803 psychiatrists in California
Psychiatry is Dr. Johnson's primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Dr. Johnson is board certified in psychiatry by the American Board of Psychiatry and Neurology. Dmand AI has Dr. Johnson's licenses on file in 3 states: California, Virginia and Minnesota.
Specialties and state licenses
- Psychiatry, CaliforniaPrimary
- Virginia license
- Minnesota license
Psychiatrists near Dr. Johnson
Counts of psychiatrists 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. Robert Allen Johnson wrote 973 Medicare Part D claims in 2021
In 2021, Dr. Johnson wrote 973 Medicare Part D claims. They cover 32 drugs, with $325,698 in total drug cost. In 2020, CMS named 2,250 claims across 40 drugs.
Part D claims, 2021973
Drugs named by CMS32
Total drug cost$325,698
Dr. Johnson's most prescribed drugs by claims, 2021
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2020 to 2021
- 2020
- 2021
- Claims for drugs CMS names
- 2020: 2,2502021: 97357%
Drugs named by CMS: 32 in 2021, 40 in 2020.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Robert Allen Johnson has 1 publication on record
Dmand AI links 1 paper to Dr. Johnson in 2016. Dr. Johnson's most frequent co-authors are Neelum T. Aggarwal, MD, David Anthony Ames, MD and David A. Bennett, MD.
Papers1
Dr. Johnson's most frequent co-authors
- Neelum T. Aggarwal, MD1 shared paper
- David Anthony Ames, MD1 shared paper
- David A. Bennett, MD1 shared paper
Recent publications by Dr. Johnson
See who Dr. Johnson researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Johnson works with, so you can find a warm path to the right psychiatrists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Robert Allen Johnson received $89 in industry payments from 2016 to 2023
CMS Open Payments shows 3 general payments to Dr. Johnson from 3 drug and device companies from 2016 to 2023. Food and beverage make up the largest share, 100% of the total. Sunovion Pharmaceuticals Inc. paid the most, $56.
General payments to Dr. Johnson by program year, 2016 to 2023
Companies that paid Dr. Johnson the most, 2016 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Robert Allen Johnson graduated from University Of Minnesota Medical School
Dr. Johnson graduated from University Of Minnesota Medical School in 1977. Dr. Johnson is a member of APA.
- Medical school
- Board certified in psychiatry
Source: Dmand AI Professional Profile Data
Sources for Dr. Robert Allen 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 |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. Robert Allen 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. Robert Allen Johnson's NPI number?
Dr. Robert Allen Johnson's NPI number is 1518138098. It was assigned on March 12, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Robert Allen Johnson?
Dr. Robert Allen Johnson is a psychiatrist in California. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
What is Dr. Robert Allen Johnson's medical license number?
Dr. Johnson's California license number on file is G42325, one of the licenses on file in 3 states.
Which states has Dr. Robert Allen Johnson been licensed in?
Dmand AI has state licenses on file for Dr. Johnson in California (1980 to 2023), Virginia (2011 to 2020) and Minnesota (1978 to 1979).
Is Dr. Robert Allen Johnson board certified?
Yes. Dr. Johnson is board certified in psychiatry by the American Board of Psychiatry and Neurology.
Where did Dr. Robert Allen Johnson go to medical school?
Dr. Johnson graduated from University Of Minnesota Medical School in 1977.
What drugs does Dr. Robert Allen Johnson prescribe most?
In 2021 Medicare Part D data, Dr. Johnson's most prescribed drugs by claims were Trazodone HCl, Olanzapine and Gabapentin.
Has Dr. Robert Allen Johnson received payments from drug or device companies?
CMS Open Payments shows $89 in general payments to Dr. Johnson from 3 companies from 2016 to 2023. The largest total came from Sunovion Pharmaceuticals Inc.
How long has Dr. Robert Allen Johnson been practicing?
Dr. Johnson graduated from medical school in 1977, 49 years ago.
Does Dr. Robert Allen Johnson do research?
Dmand AI links 1 publication to Dr. Johnson.
Who does Dr. Robert Allen Johnson publish with?
Dr. Johnson's most frequent co-authors are Neelum T. Aggarwal, MD (1 shared paper), David Anthony Ames, MD (1 shared paper) and David A. Bennett, MD (1 shared paper).
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