Siddhartha Kumar, MD
NPI 1265464374 · Psychiatry Physician · Diamond Bar, CA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Siddhartha Kumar, MD is a Psychiatry Physician provider in Diamond Bar, CA (NPI 1265464374).
Provider details
- NPI number
- 1265464374
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- C54200 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Trazodone Hcl | 53 | 17 |
| Clonazepam | 39 | — |
| Quetiapine Fumarate | 31 | — |
| Duloxetine Hcl | 30 | — |
| Lorazepam | 28 | — |
| Fluoxetine Hcl | 26 | — |
| Buspirone Hcl | 23 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-07
- Last updated
- 2021-12-08
Frequently asked questions
- What is Siddhartha Kumar's NPI number?
- Siddhartha Kumar's National Provider Identifier (NPI) is 1265464374, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Siddhartha Kumar's specialty?
- Siddhartha Kumar is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Siddhartha Kumar located?
- Siddhartha Kumar's practice location on file with NPPES is 1336 Bridgegate Dr, Diamond Bar, CA 91765-3955.
- What is Siddhartha Kumar's phone number?
- The practice phone number listed in the NPPES registry for Siddhartha Kumar is (626) 960-4844.
- Does Siddhartha Kumar accept Medicare?
- Siddhartha Kumar is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Siddhartha Kumar's NPI active?
- Yes — Siddhartha Kumar's NPI (1265464374) is active in the NPPES registry as of the last update on 2021-12-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.