John Rostkowski, M.D.
NPI 1861424665 · Psychiatry Physician · Concord, CA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Rostkowski, M.D. is a Psychiatry Physician provider in Concord, CA (NPI 1861424665).
Provider details
- NPI number
- 1861424665
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- G24111 (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
19 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 · 25 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Clonazepam | 193 | 28 |
| Quetiapine Fumarate | 77 | 16 |
| Trazodone Hcl | 68 | 15 |
| Aripiprazole | 62 | — |
| Olanzapine | 57 | 13 |
| Lorazepam | 42 | — |
| Risperidone | 36 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$765 across 7 records (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
- 2006-07-06
- Last updated
- 2023-03-01
- Certified
- 2021-06-15
Frequently asked questions
- What is John Rostkowski's NPI number?
- John Rostkowski's National Provider Identifier (NPI) is 1861424665, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Rostkowski's specialty?
- John Rostkowski is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is John Rostkowski located?
- John Rostkowski's practice location on file with NPPES is 1420 Willow Pass Rd # 200, Concord, CA 94520-5823.
- What is John Rostkowski's phone number?
- The practice phone number listed in the NPPES registry for John Rostkowski is (925) 899-3883.
- Does John Rostkowski accept Medicare?
- John Rostkowski is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Rostkowski's NPI active?
- Yes — John Rostkowski's NPI (1861424665) is active in the NPPES registry as of the last update on 2023-03-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.