Jantje Groot, MD
NPI 1083859912 · Psychiatry Physician · Ventura, CA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jantje Groot, MD is a Psychiatry Physician provider in Ventura, CA (NPI 1083859912).
Provider details
- NPI number
- 1083859912
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A102213 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
17 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 48 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Clozapine | 387 | 30 |
| Bupropion Hclbrand: Bupropion Xl | 160 | 30 |
| Paliperidone Palmitatebrand: Invega Sustenna | 150 | 13 |
| Gabapentin | 132 | 33 |
| Olanzapine | 124 | 21 |
| Trazodone Hcl | 114 | 24 |
| Clonazepam | 85 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$95 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-12-05
- Last updated
- 2021-05-21
- Certified
- 2021-05-21
Frequently asked questions
- What is Jantje Groot's NPI number?
- Jantje Groot's National Provider Identifier (NPI) is 1083859912, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jantje Groot's specialty?
- Jantje Groot is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Jantje Groot located?
- Jantje Groot's practice location on file with NPPES is 4258 Telegraph Rd, Ventura, CA 93003-3706.
- What is Jantje Groot's phone number?
- The practice phone number listed in the NPPES registry for Jantje Groot is (805) 477-5700.
- Does Jantje Groot accept Medicare?
- Jantje Groot is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jantje Groot's NPI active?
- Yes — Jantje Groot's NPI (1083859912) is active in the NPPES registry as of the last update on 2021-05-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.