Nishi Verma Marquez, D.O.
Child & Adolescent Psychiatry Physician · Chatsworth, CA
Nishi Verma Marquez, D.O. is a child & adolescent psychiatry physician with a practice address in Chatsworth, California, and NPI 1932220860, issued on Apr 2, 2007. Check the license (California 20A8497, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Nishi Verma Marquez
- Credential
- D.O.
- Primary taxonomy
- Child & Adolescent Psychiatry Physician 2084P0804X
- License number
- 20A8497 CA
Self-reported in NPPES; status is on the state search - Practice location
- 21000 Plummer St, Chatsworth, CA 91311
- Phone
- (562) 833-0493
- Enumerated
- Apr 2, 2007
- Record last updated
- Sep 26, 2023
- Entity
- Type 1 · individual
8 nearest child & adolescent psychiatry physician records → All 1,009 in California → Look up another NPI →
Also registered at 21000 Plummer St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Joan Archer, LCSWClinical Social Worker1184128985
- Brayan BarronRehabilitation Practitioner1144968801
- Richard Bartley, CADC-II, ICADCAddiction (Substance Use Disorder) Counselor1720560527
- Steven BeardSocial Worker1285191601
- Krystel Berio, LCSWClinical Social Worker1679908263
- Demery BeverlyClinical Social Worker1649005059
Verify Nishi Verma Marquez in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A8497Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
84% fewer Medicare Part D claims than the average child & adolescent psychiatry physician in 2024
81 Medicare Part D claims for 61 beneficiaries, against an average of 504 among the 3,545 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Lorazepam13 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.
Nishi Verma Marquez among 1,009 child & adolescent psychiatry physician records in California
Nishi Verma Marquez, D.O. is one of 1,009 child & adolescent psychiatry physician records with a practice address in California. 55% 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 35% of them.
- NPI issued2007 · 35% of these records are older, 41% newer
- In a Medicare fileYes · 55% of these records are
- In the CMS Doctors and Clinicians fileNo · 21% of these records are
- Record last updated2023 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0804X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Child & Adolescent Psychiatry Physician providers in California
There are 1,009 child & adolescent psychiatry physician records in California.
All 1,009 in California → Every provider in Chatsworth → Child & Adolescent Psychiatry Physician nationwide →
The 8 child & adolescent psychiatry physician records with the nearest ZIP codes
- Glenna Smith, MDEncino, CA 913161841686730
- Marilyn Kroplick, MDCalabasas, CA 913021043479520
- Heather Lin, M.D.Calabasas, CA 913021174653166
- Rashmi Williams, MDCalabasas, CA 913021942610902
- Sarla Karan, M.D.Northridge, CA 913251952425225
- Arthur Roemmelt, MDPacoima, CA 913311023227279
- Laurence Glasser, M.D., M.P.H.Reseda, CA 913351356417547
- Elsa Haloman, M.D.Reseda, CA 913351275823791
Common questions
What is Nishi Verma Marquez, D.O.'s NPI number?
Nishi Verma Marquez, D.O.'s National Provider Identifier (NPI) is 1932220860, issued on Apr 2, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Nishi Verma Marquez, D.O. located?
The NPPES record lists a practice address at 21000 Plummer St, Chatsworth, CA, 91311. Phone: (562) 833-0493. Providers update this record themselves, so call before visiting.
How can I verify Nishi Verma Marquez, D.O.'s license?
NPPES lists California license number 20A8497, 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 Nishi Verma Marquez, D.O. prescribe under Medicare Part D?
In 2024, Nishi Verma Marquez, D.O. had 81 Medicare Part D claims for 61 beneficiaries; the average among child & adolescent psychiatry physician prescribers was 504. 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.