Dr. Gadson John Johnson Jr., MD
- Medicare services, 2024
- 15,374
- Medicare patients, 2024
- 1,287
- Part D claims, 2024
- 8,430
- MIPS score, 2024
- 75
- Hospital affiliations
- 5
- Practice address
- 44445 15th W St, Lancaster, CA 93534
- Practice phone
- Call (661) 948-7501
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Wellsprings Post Acute Center
Lancaster, California
Find Dr. Johnson's professional email, personal email and mobile number
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Dr. Gadson John Johnson Jr. is a psychiatrist in Lancaster, California
Dr. Johnson practices at Wellsprings Post Acute Center in Lancaster, California.
Dr. Johnson's NPI, 1578767232, was assigned on June 14, 2007. Dr. Johnson graduated from David Geffen School of Medicine at UCLA in 2005. Dr. Johnson holds California license A100422.
- NPI
- 1578767232NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3577631852
- NPI enumeration date
- June 14, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (661) 948-7501
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 47
- Medical school graduation
- 2005
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gadson John Johnson Jr. practices at Wellsprings Post Acute Center in Lancaster, California
Dr. Johnson's primary practice is Wellsprings Post Acute Center, at 44445 15th W St, Lancaster, CA 93534 in Los Angeles County. The practice phone is (661) 948-7501.
- Wellsprings Post Acute Center44445 15th W St, Lancaster, CA 93534 · Los Angeles CountyPhone(661) 948-7501
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Gadson John Johnson Jr. is affiliated with 7 sites of care and 1 medical group
Dr. Johnson's primary practice is Wellsprings Post Acute Center in Lancaster, California. Dr. Johnson is also affiliated with Southern California Hospital at Hollywood. The medical group on file is Oceanside Medical Group. Dmand AI also links Dr. Johnson to 4 more hospitals and 1 group practice or clinic, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Gadson John Johnson Jr.'s practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Johnson practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Wellsprings Post Acute Center | Available with a free account |
| +6 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gadson John Johnson Jr. 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 licensed in California.
Specialties and state licenses
- Psychiatry, CaliforniaPrimary
Clinical focus
Dmand AI lists anxiety, bipolar disorder, dementia, depression, insomnia, psychological distress, psychoses and schizophrenia among the conditions Dr. Johnson treats.
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. Gadson John Johnson Jr. billed Medicare for 15,374 services in 2024
CMS data shows 15,374 Medicare services from Dr. Johnson across 8 procedure codes in 2024, for 1,287 Medicare patients. Medicare paid $730,163 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Johnson's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 10,0272024: 11,29913%
- Tests and treatments
- 2023: 3,8962024: 4,0755%
Dr. Johnson compared with the California median for psychiatrists, 2024
- Dr. Johnson
- California median
- Medicare services
- 15,374vs 119129.2 times
- Medicare patients
- 1,287vs 4131.4 times
- Part D claims
- 8,304vs 14457.7 times
Medians across 6,809 psychiatrists in California with Dmand AI profiles that report each measure.
Dr. Johnson's most billed Medicare procedure codes, 2024
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. Gadson John Johnson Jr. treated 1,287 Medicare patients in 2024, average age 67
CMS counts 1,287 Medicare patients who saw Dr. Johnson in 2024. The largest group is 65 to 74, with 522 patients. 75% of them have anxiety, and 75% have depression. 96% are also on Medicaid. Their average risk score is 3.16, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Johnson's median patient age at 71, with 49% women.
Dr. Johnson's Medicare patients by age, 2024
Dr. Johnson's Medicare patients by sex, 2024
- Women57244%
- Men71556%
Chronic conditions among Dr. Johnson's Medicare patients, 2024
- Anxiety75%
- Depression75%
- High blood pressure75%
- High cholesterol75%
- Mood disorders75%
- Schizophrenia and other psychoses75%
- Arthritis74%
- COPD66%
Share of Medicare patients with each condition. A patient can have several.
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 71
Patient panel by sex, all payers
- Women49%
- Men50%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gadson John Johnson Jr. wrote 8,430 Medicare Part D claims in 2024
In 2024, Dr. Johnson wrote 8,430 Medicare Part D claims for 656 patients. 97% of them were for generic drugs. CMS names the drug for 8,304 of them, across 57 drugs with 11 or more claims each, at $925,013 in total drug cost. In 2023, CMS named 8,473 claims across 56 drugs.
Dr. Johnson's Part D claims by kind of drug, 2024
- Generic8,193 claims97%
- Brand-name237 claims3%
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
- Antipsychotics, patients 65 and over34%2,873 of 8,430 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: 8,4732024: 8,3042%
Drugs named by CMS: 57 in 2024, 56 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. Gadson John Johnson Jr. scored 75 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 75 out of 100 for Dr. Johnson for performance year 2024, reported as part of a group. Dr. Johnson accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
- MIPS final score, 2024
- 75 of 100
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Gadson John Johnson Jr. received $134 in industry payments from 2016 to 2025
CMS Open Payments shows 7 general payments to Dr. Johnson from 1 drug or device company from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Janssen Pharmaceuticals, Inc paid the most, $134.
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. Gadson John Johnson Jr. graduated from David Geffen School of Medicine at UCLA
Dr. Johnson graduated from David Geffen School of Medicine at UCLA in 2005.
- Medical school
Source: Dmand AI Professional Profile Data
Dr. Gadson John Johnson Jr. accepts plans from 7 insurance carriers
Dr. Johnson is in network with 7 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- CMS Medicare
Plan types Dr. Johnson accepts, by number of carriers
- Medicare7
- PPO6
- HMO3
- POS3
- EPO2
Source: Dmand AI Insurance Network Data
Sources for Dr. Gadson John Johnson Jr.'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation 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 DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| 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)Clinician Public Reporting: Overall MIPS Performance (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. Gadson John Johnson Jr.
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. Gadson John Johnson Jr.'s NPI number?
Dr. Gadson John Johnson Jr.'s NPI number is 1578767232. It was assigned on June 14, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Gadson John Johnson Jr.?
Dr. Gadson John Johnson Jr. is a psychiatrist in Lancaster, California. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Dr. Gadson John Johnson Jr. practice?
Dr. Johnson practices at 44445 15th W St, Lancaster, CA 93534. Dr. Johnson's primary practice is Wellsprings Post Acute Center in Lancaster, California. Dmand AI also links Dr. Johnson to 4 hospitals and 1 group practice or clinic.
What is Dr. Gadson John Johnson Jr.'s office phone number?
The practice phone on file for Dr. Johnson is (661) 948-7501.
What is Dr. Gadson John Johnson Jr.'s medical license number?
Dr. Johnson holds California license A100422.
Which hospitals is Dr. Gadson John Johnson Jr. affiliated with?
Dr. Johnson is affiliated with Southern California Hospital at Hollywood. Dmand AI links Dr. Johnson to 4 more hospitals.
What medical group is Dr. Gadson John Johnson Jr. part of?
Dr. Johnson is linked to Oceanside Medical Group.
Does Dr. Gadson John Johnson Jr. accept Medicare?
Yes. CMS data shows Dr. Johnson billed Medicare for 15,374 services in 2024, and Dr. Johnson accepts Medicare assignment.
What is Dr. Gadson John Johnson Jr.'s MIPS score?
Dr. Johnson's MIPS final score for performance year 2024 is 75 out of 100, reported as part of a group.
How many Medicare patients does Dr. Gadson John Johnson Jr. see?
CMS counts 1,287 Medicare patients who saw Dr. Johnson in 2024, with an average age of 67.
Show 6 more questionsShow fewer questions
What services does Dr. Gadson John Johnson Jr. bill to Medicare?
In 2024, Dr. Johnson's most billed Medicare services were hospital inpatient care (99231), psychiatric service (90833) and hospital inpatient care (99232).
Where did Dr. Gadson John Johnson Jr. go to medical school?
Dr. Johnson graduated from David Geffen School of Medicine at UCLA in 2005.
What drugs does Dr. Gadson John Johnson Jr. prescribe most?
In 2024 Medicare Part D data, Dr. Johnson's most prescribed drugs by claims were Divalproex Sodium, Quetiapine Fumarate and Risperidone.
Has Dr. Gadson John Johnson Jr. received payments from drug or device companies?
CMS Open Payments shows $134 in general payments to Dr. Johnson from 1 company from 2016 to 2025. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. Gadson John Johnson Jr. been practicing?
Dr. Johnson graduated from medical school in 2005, 21 years ago.
What insurance does Dr. Gadson John Johnson Jr. accept?
Dr. Johnson is in network with 7 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
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