Orin L. Bigman, MD
Psychiatry Physician · Walnut Creek, CA
Orin L. Bigman, MD is a psychiatry physician with a practice address in Walnut Creek, California, and NPI 1669550760, issued on Nov 2, 2006. Check the license (California G45125, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Orin L. Bigman
- Credential
- MD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- G45125 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1425 S Main St, Walnut Creek, CA 94596
- Phone
- (925) 295-4000
- Enumerated
- Nov 2, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicaid ID
- 00G451250 CA
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →
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Verify Orin L. Bigman in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G45125Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Orin L. Bigman among 8,673 psychiatry physician records in California
Orin L. Bigman, 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 not. Its NPI, issued in 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 67% newer
- In a Medicare fileNo · 67% of these records are
- In the CMS Doctors and Clinicians fileNo · 38% of these records are
- Record last updated2007 · 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).
67 psychiatry physician records list a practice address in Walnut Creek
They are 67 of the 6,170 NPPES records with a practice address in Walnut Creek, and 8,673 psychiatry physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 8,673 in California → Every provider in Walnut Creek → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Eugene Crayton, MDWalnut Creek, CA 945961740327923
- Dharmini Harichandran, M.DWalnut Creek, CA 945961386668820
- Chelvadurai Harichandran, M.DWalnut Creek, CA 945961386782860
- John Hawkins, DOWalnut Creek, CA 945961730267824
- David Ritvo, M.D.Walnut Creek, CA 945961205832094
- Michael Schwab, M.D.Walnut Creek, CA 945961093880601
- Richard Silver, MDWalnut Creek, CA 945961891873972
- Alex Smirnoff, M.D.Walnut Creek, CA 945961649329681
Common questions
What is Orin L. Bigman, MD's NPI number?
Orin L. Bigman, MD's National Provider Identifier (NPI) is 1669550760, issued on Nov 2, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Orin L. Bigman, MD located?
The NPPES record lists a practice address at 1425 S Main St, Walnut Creek, CA, 94596. Phone: (925) 295-4000. Providers update this record themselves, so call before visiting.
How can I verify Orin L. Bigman, MD's license?
NPPES lists California license number G45125, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.