Siddhartha Kumar, MD
Psychiatry Physician · Diamond Bar, CA
Siddhartha Kumar, MD is a psychiatry physician with a practice address in Diamond Bar, California, and NPI 1265464374, issued on Jul 7, 2006. Check the license (California C54200, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Siddhartha Kumar
- Credential
- MD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- C54200 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1336 Bridgegate Dr, Diamond Bar, CA 91765
- Phone
- (626) 960-4844
- Enumerated
- Jul 7, 2006
- Record last updated
- Dec 8, 2021 (not updated in 5 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →
Also registered at 1336 Bridgegate Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Uche Asiodu, LCSWClinical Social Worker1285078790
- Carla Becktell, LMFTMarriage & Family Therapist1376062646
- Tricia Dela Cruz, LMFTMental Health Counselor1467584011
- Lawrence Gee, PHARM DPharmacist1487163614
- Veronica GonzalezMental Health Counselor1629417464
- Amy GoodsonMarriage & Family Therapist1003669250
Verify Siddhartha Kumar in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C54200Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
56% fewer Medicare Part D claims than the average psychiatry physician in 2024
437 Medicare Part D claims for 45 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Trazodone Hcl53 claims
- Clonazepam39 claims
- Quetiapine Fumarate31 claims
- Duloxetine Hcl30 claims
- Lorazepam28 claims
- Fluoxetine Hcl26 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.
Siddhartha Kumar among 8,673 psychiatry physician records in California
Siddhartha Kumar, 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 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 67% 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).
10 psychiatry physician records list a practice address in Diamond Bar
They are 10 of the 598 NPPES records with a practice address in Diamond Bar, and 8,673 psychiatry physician records in California.
All 8,673 in California → Every provider in Diamond Bar → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Paul Brown, M.D.Diamond Bar, CA 917651437361789
- Sateesh Gunda, M.D.Diamond Bar, CA 917651134407844
- Adel Hanna, MDDiamond Bar, CA 917651194868224
- Zachary Herzfeldt, M.D.Diamond Bar, CA 917651205215936
- Karen Kiefer, D.O.Diamond Bar, CA 917651578586574
- Margaret Lin, MDDiamond Bar, CA 917651275600132
- Vimal Satodiya, M.D.Diamond Bar, CA 917651174879134
- Kevin Wethey, MDDiamond Bar, CA 917651306378559
Common questions
What is Siddhartha Kumar, MD's NPI number?
Siddhartha Kumar, MD's National Provider Identifier (NPI) is 1265464374, issued on Jul 7, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Siddhartha Kumar, MD located?
The NPPES record lists a practice address at 1336 Bridgegate Dr, Diamond Bar, CA, 91765. Phone: (626) 960-4844. Providers update this record themselves, so call before visiting.
How can I verify Siddhartha Kumar, MD's license?
NPPES lists California license number C54200, 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 Siddhartha Kumar, MD prescribe under Medicare Part D?
In 2024, Siddhartha Kumar, MD had 437 Medicare Part D claims for 45 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.