Jonathan Kalkstein, M.D.
NPI 1992917587 · Psychiatry Physician · Martinez, CA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jonathan Kalkstein, M.D. is a Psychiatry Physician provider in Martinez, CA (NPI 1992917587).
Provider details
- NPI number
- 1992917587
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A92571 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-05-04
- Last updated
- 2020-12-10
- Certified
- 2020-12-10
Frequently asked questions
- What is Jonathan Kalkstein's NPI number?
- Jonathan Kalkstein's National Provider Identifier (NPI) is 1992917587, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jonathan Kalkstein's specialty?
- Jonathan Kalkstein is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Jonathan Kalkstein located?
- Jonathan Kalkstein's practice location on file with NPPES is 2500 Alhambra Ave, Martinez, CA 94553-3156.
- What is Jonathan Kalkstein's phone number?
- The practice phone number listed in the NPPES registry for Jonathan Kalkstein is (415) 370-5000.
- Does Jonathan Kalkstein accept Medicare?
- Jonathan Kalkstein is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jonathan Kalkstein's NPI active?
- Yes — Jonathan Kalkstein's NPI (1992917587) is active in the NPPES registry as of the last update on 2020-12-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.