Derek S. Mongold, MD
Psychiatry Physician · Antioch, CA
Derek S. Mongold, MD is a psychiatry physician with a practice address in Antioch, California, and NPI 1700099264, issued on May 8, 2007. Check the license (California A122589, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Derek S. Mongold
- Credential
- MD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License numbers
- A122589 CA
0101251845 VA
22903 WV
Self-reported in NPPES; status is on the state search - Practice location
- 3400 Delta Fair Blvd, Antioch, CA 94509
- Phone
- (925) 777-6399
- Enumerated
- May 8, 2007
- Record last updated
- Dec 15, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20150827002191); accepts Medicare assignment
- Medical or professional school
- West Virginia University School Of Medicine, 2005
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →
Also registered at 3400 Delta Fair Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Derek S. Mongold in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A122589Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.1 times the Medicare Part D claims of the average psychiatry physician in 2024
2,145 Medicare Part D claims for 230 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 2% of claims.
Most prescribed
- Quetiapine Fumarate236 claims
- Bupropion Xl159 claims
- Trazodone Hcl116 claims
- Fluoxetine Hcl110 claims
- Duloxetine Hcl103 claims
- Clonazepam101 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.
Bills Medicare through one group practice
- Permanente Medical Group IncAntioch, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Derek S. Mongold among 8,673 psychiatry physician records in California
Derek S. Mongold, 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 2007, is newer than 33% of them.
- NPI issued2007 · 33% of these records are older, 48% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 38% of these records are
- Graduated2005 · median 2005 among the 3,295 with a school on file
- 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).
Psychiatry Physician providers in California
There are 8,673 psychiatry physician records in California.
All 8,673 in California → Every provider in Antioch → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Thomas Jones, MDAntioch, CA 945091871645846
- Kyle Owen, DOAntioch, CA 945091346392578
- Kavitha Rao, M.D.Antioch, CA 945091568527240
- Harinder Auluck, MDBenicia, CA 945101538111661
- Robert Fisher, MDBenicia, CA 945101760631626
- Nathan Thuma, M.D.Angwin, CA 945081245316314
- Said Ibrahimi, M.D.Danville, CA 945061740560861
- Ronel Lewis, MDDanville, CA 945061558588129
Common questions
What is Derek S. Mongold, MD's NPI number?
Derek S. Mongold, MD's National Provider Identifier (NPI) is 1700099264, issued on May 8, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Derek S. Mongold, MD located?
The NPPES record lists a practice address at 3400 Delta Fair Blvd, Antioch, CA, 94509. Phone: (925) 777-6399. Providers update this record themselves, so call before visiting.
How can I verify Derek S. Mongold, MD's license?
NPPES lists California license number A122589, 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 Derek S. Mongold, MD prescribe under Medicare Part D?
In 2024, Derek S. Mongold, MD had 2,145 Medicare Part D claims for 230 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.