Child Adolesc Psychiatry Ment Health
Dr. Gerrit Ian Van Schalkwyk, MD
NPI1811242381
- Medicare services, 2023
- 20
- Publications
- 44
- Clinical trials
- 1
- Affiliated sites
- 1
- Medical groups
- 3
- Practice address
- 3853 Rosecrans St, San Diego, CA 92110
- Practice phone
- Call (619) 692-8200
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
County of San Diego
San Diego, California
Find Dr. Van Schalkwyk's professional email, personal email and mobile number
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Dr. Gerrit Ian Van Schalkwyk is a psychiatrist in San Diego, California
Dr. Van Schalkwyk practices at County of San Diego in San Diego, California.
Dr. Van Schalkwyk's NPI, 1811242381, was assigned on July 19, 2012. Dr. Van Schalkwyk holds Utah license 11866360-1205.
NPI and contact details
- NPI
- 1811242381NPI Registry (opens in a new tab)
- NPI enumeration date
- July 19, 2012
- NPI status
- Active
- Practice phone
- (619) 692-8200
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 41
- Medical school graduation
- 2011
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Gerrit Ian Van Schalkwyk practices at County of San Diego in San Diego, California
Dr. Van Schalkwyk's primary practice is County of San Diego, at 3853 Rosecrans St, San Diego, CA 92110 in San Diego County. The practice phone is (619) 692-8200.
- County of San Diego3853 Rosecrans St, San Diego, CA 92110 · San Diego CountyPhone(619) 692-8200
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Gerrit Ian Van Schalkwyk is affiliated with 2 sites of care and 3 medical groups
Dr. Van Schalkwyk's primary practice is County of San Diego in San Diego, California. The medical group on file is Health & Human Services Agency. Dmand AI also links Dr. Van Schalkwyk to 2 more medical groups and 1 group practice or clinic, each named with a free account.
County of San DiegoPrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Gerrit Ian Van Schalkwyk's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Van Schalkwyk practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| County of San Diego | Available with a free account |
| +1 more site and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gerrit Ian Van Schalkwyk is one of 6,803 psychiatrists in California
Psychiatry is Dr. Van Schalkwyk's primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Dmand AI has Dr. Van Schalkwyk's licenses on file in 2 states: Utah and Connecticut.
Specialties and state licenses
- Psychiatry, UtahPrimary
- Child and adolescent psychiatry, Connecticut
Psychiatrists near Dr. Van Schalkwyk
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. Gerrit Ian Van Schalkwyk billed Medicare for 20 services in 2023
CMS data shows 20 Medicare services from Dr. Van Schalkwyk across 1 procedure code in 2023. Medicare paid $1,210 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 202320
Paid by Medicare$1,210
Procedure codes1
Dr. Van Schalkwyk's Medicare services by type, 2022 to 2023
- 2022
- 2023
- Office and hospital visits
- 2022: 1042023: 2081%
- Tests and treatments
- 2022: 672023: 0100%
Dr. Van Schalkwyk compared with the California median for psychiatrists, 2023
- Dr. Van Schalkwyk
- California median
- Medicare services
- 20vs 11983% below
Medians across 6,809 psychiatrists in California with Dmand AI profiles that report each measure.
Dr. Van Schalkwyk's most billed Medicare procedure codes, 2023
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. Gerrit Ian Van Schalkwyk's patients have a median age of 44
Across all payers, Dmand AI patient panel data puts Dr. Van Schalkwyk's median patient age at 44, with 17% women.
Dr. Van Schalkwyk's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 44
Patient panel by sex, all payers
- Women17%
- Men83%
Source: Dmand AI Patient Panel Data
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Dr. Gerrit Ian Van Schalkwyk has 44 publications on record
Dmand AI links 44 papers to Dr. Van Schalkwyk, published from 2012 to 2025. 2015 was the busiest year, with 6. The most frequent topics are Autism Spectrum Disorder, Qualitative Research and Psychiatry. Dr. Van Schalkwyk has published most often in J Autism Dev Disord. Dr. Van Schalkwyk's most frequent co-authors are Alan Seth Lewis, MD, PhD, Zheala Qayyum, MD and Jack L. Turban, MD.
Papers44
Years published2012 to 2025
Dr. Van Schalkwyk's papers by year, 2012 to 2025
Topics Dr. Van Schalkwyk writes about most
- Autism Spectrum Disorder
- Qualitative Research
- Psychiatry
- Aggression
- Antipsychotic Agents
- Internship and Residency
- Mental Disorders
- Nicotinic Agonists
Dr. Van Schalkwyk's most frequent co-authors
- Alan Seth Lewis, MD, PhD6 shared papers
- Zheala Qayyum, MD3 shared papers
- Jack L. Turban, MD3 shared papers
Recent publications by Dr. Van Schalkwyk
J Am Acad Child Adolesc Psychiatry
Affective SymptomsEmotions
Neurosci Biobehav Rev
Affective SymptomsAttention Deficit Disorder with HyperactivityMood Disorders
Child Adolesc Psychiatry Ment Health
Acad Psychiatry
Internship and ResidencyPsychiatrySuicide Prevention
See who Dr. Van Schalkwyk researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Van Schalkwyk 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. Gerrit Ian Van Schalkwyk has worked on 1 clinical trial
Dmand AI links Dr. Van Schalkwyk to 1 clinical trial. Conditions studied include Aggression and Aberrant Motor Behavior in Dementia.
Conditions in Dr. Van Schalkwyk's trials
- Aggression
- Aberrant Motor Behavior in Dementia
Recent clinical trials with Dr. Van Schalkwyk
Nicotinic Cholinergic Modulation as a Novel Treatment Strategy for Aggression Associated With Autism (opens in a new tab)
CompletedPhase 1
AggressionAberrant Motor Behavior in DementiaTransdermal nicotine
Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)
Sources for Dr. Gerrit Ian Van Schalkwyk'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 Data |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Clinical trials and co-investigators | Dmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (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 Dr. Gerrit Ian Van Schalkwyk
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. Gerrit Ian Van Schalkwyk's NPI number?
Dr. Gerrit Ian Van Schalkwyk's NPI number is 1811242381. It was assigned on July 19, 2012, and it is active in the NPI Registry.
What kind of doctor is Dr. Gerrit Ian Van Schalkwyk?
Dr. Gerrit Ian Van Schalkwyk is a psychiatrist in San Diego, California. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Dr. Gerrit Ian Van Schalkwyk practice?
Dr. Van Schalkwyk practices at 3853 Rosecrans St, San Diego, CA 92110. Dr. Van Schalkwyk's primary practice is County of San Diego in San Diego, California. Dmand AI also links Dr. Van Schalkwyk to 2 medical groups and 1 group practice or clinic.
What is Dr. Gerrit Ian Van Schalkwyk's office phone number?
The practice phone on file for Dr. Van Schalkwyk is (619) 692-8200.
What is Dr. Gerrit Ian Van Schalkwyk's medical license number?
Dr. Van Schalkwyk holds Utah license 11866360-1205, one of the licenses on file in 2 states.
Which states has Dr. Gerrit Ian Van Schalkwyk been licensed in?
Dmand AI has state licenses on file for Dr. Van Schalkwyk in Utah and Connecticut.
What medical group is Dr. Gerrit Ian Van Schalkwyk part of?
Dr. Van Schalkwyk is linked to Health & Human Services Agency. Dmand AI links Dr. Van Schalkwyk to 2 more medical groups.
Does Dr. Gerrit Ian Van Schalkwyk accept Medicare?
Yes. CMS data shows Dr. Van Schalkwyk billed Medicare for 20 services in 2023.
What services does Dr. Gerrit Ian Van Schalkwyk bill to Medicare?
In 2023, Dr. Van Schalkwyk's most billed Medicare services were hospital inpatient care (99232).
How long has Dr. Gerrit Ian Van Schalkwyk been practicing?
Dr. Van Schalkwyk graduated from medical school in 2011, 15 years ago.
Does Dr. Gerrit Ian Van Schalkwyk do research?
Dmand AI links 44 publications to Dr. Van Schalkwyk, published from 2012 to 2025. Dr. Van Schalkwyk has worked on 1 clinical trial.
Who does Dr. Gerrit Ian Van Schalkwyk publish with?
Dr. Van Schalkwyk's most frequent co-authors are Alan Seth Lewis, MD, PhD (6 shared papers), Zheala Qayyum, MD (3 shared papers) and Jack L. Turban, MD (3 shared papers).
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