Jantje Matthew Groot, MD
Psychiatry Physician · Ventura, CA
Jantje Matthew Groot, MD is a psychiatry physician with a practice address in Ventura, California, and NPI 1083859912, issued on Dec 5, 2008. Check the license (California A102213, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jantje Matthew Groot
- Credential
- MD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- A102213 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4258 Telegraph RD, Ventura, CA 93003
- Phone
- (805) 477-5700
- Enumerated
- Dec 5, 2008
- Record last updated
- May 21, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (805) 644-5245
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →
Also registered at 4258 Telegraph RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Diana AlbarranSocial Worker1114586377
- Katharine AmesRehabilitation Practitioner1134850407
- Eric ArroyoCase Manager/Care Coordinator1679009948
- Reynaldo AyalaCase Manager/Care Coordinator1992372080
- Stephan BalitaoPsychiatric/Mental Health Registered Nurse1023666310
- Monisha BentonRehabilitation Practitioner1265242044
Verify Jantje Matthew Groot in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A102213Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.0 times the Medicare Part D claims of the average psychiatry physician in 2024
2,964 Medicare Part D claims for 139 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims.
Most prescribed
- Clozapine387 claims
- Bupropion Xl160 claims
- Invega Sustenna150 claims
- Gabapentin132 claims
- Olanzapine124 claims
- Trazodone Hcl114 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $95.24
1 payment: food and beverage; the largest payer was Abbvie Inc. The 13,693 providers of this specialty with any payment received $4,954.93 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Jantje Matthew Groot among 8,673 psychiatry physician records in California
Jantje Matthew Groot, MD is one of 8,673 psychiatry physician records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 52% of them.
- NPI issued2008 · 52% of these records are older, 43% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileNo · 38% of these records are
- Record last updated2021 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
74 psychiatry physician records list a practice address in Ventura
They are 74 of the 4,435 NPPES records with a practice address in Ventura, and 8,673 psychiatry physician records in California.
All 8,673 in California → Every provider in Ventura → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Beena Anantharaman, M.D.Ventura, CA 930031396713376
- Ralph Armstrong, M.D.Ventura, CA 930031518016443
- Sumathi Balaraman, DOVentura, CA 930031902995707
- Pedro EvaVentura, CA 930031962444703
- Michael Ferguson, M.D.Ventura, CA 930031770586851
- Nomi Fredrick, M.D.Ventura, CA 930031538192471
- Gregory Gray, MDVentura, CA 930031326129479
- Victoria Hendrick, M.D.Ventura, CA 930031205943131
Common questions
What is Jantje Matthew Groot, MD's NPI number?
Jantje Matthew Groot, MD's National Provider Identifier (NPI) is 1083859912, issued on Dec 5, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Jantje Matthew Groot, MD located?
The NPPES record lists a practice address at 4258 Telegraph RD, Ventura, CA, 93003. Phone: (805) 477-5700. Providers update this record themselves, so call before visiting.
How can I verify Jantje Matthew Groot, MD's license?
NPPES lists California license number A102213, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Jantje Matthew Groot, MD prescribe under Medicare Part D?
In 2024, Jantje Matthew Groot, MD had 2,964 Medicare Part D claims for 139 beneficiaries; the average among psychiatry physician prescribers was 1,000. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.