Steven Co, D.O.
Psychiatry Physician · Pasadena, CA
Steven Co, D.O. is a psychiatry physician with a practice address in Pasadena, California, and NPI 1669911095, issued on Feb 17, 2017. Check the license (California 20A16723, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Steven Co
- Credential
- D.O.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 20A16723 CA
Self-reported in NPPES; status is on the state search - Practice location
- 393 E Walnut St, Pasadena, CA 91188
- Phone
- (866) 205-3595
- Enumerated
- Feb 17, 2017
- Record last updated
- May 6, 2022
- Medicare enrollment
- Enrolled (PECOS I20210107001194); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →
Also registered at 393 E Walnut St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Cecilia Abban, FNPFamily Nurse Practitioner1437121605
- Brian Apter, M.D.Hospitalist Physician1134418171
- Isabella AquinoMarriage & Family Therapist1700475167
- Annapoorani AsokanInternal Medicine Physician1750083960
- Rozely Barbero, DNP, CRNACertified Registered Nurse Anesthetist1184324097
- Leona Bell, RN CRNPPediatrics Physician1457342941
Verify Steven Co in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A16723Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
13% more Medicare Part D claims than the average psychiatry physician in 2024
1,130 Medicare Part D claims for 180 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 5% of claims.
Most prescribed
- Sertraline Hcl84 claims
- Trazodone Hcl80 claims
- Gabapentin78 claims
- Buspirone Hcl68 claims
- Duloxetine Hcl66 claims
- Quetiapine Fumarate62 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
- Southern California Permanente Medical GroupOntario, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Steven Co among 8,673 psychiatry physician records in California
Steven Co, D.O. 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 2017, is newer than 79% of them.
- NPI issued2017 · 79% of these records are older, 18% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 38% of these records are
- Graduated2017 · median 2005 among the 3,295 with a school on file
- Record last updated2022 · 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 Pasadena → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Ijeoma Madu, MDPasadena, CA 911881912265422
- Diba Sameni, M.D.Pasadena, CA 911881306887351
- Manohar Shinde, MD PHDGlendale, CA 912011659472124
- Tamara Aloyan, M.D.Glendale, CA 912021437205853
- Bessy Martirosyan, M.D.Glendale, CA 912021790849883
- Cristian Penciu, M.D.Glendale, CA 912021538329693
- Sara Epstein, MDGlendale, CA 912031912930884
- Anahit Matevosyan, MDGlendale, CA 912031255463899
Common questions
What is Steven Co, D.O.'s NPI number?
Steven Co, D.O.'s National Provider Identifier (NPI) is 1669911095, issued on Feb 17, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Steven Co, D.O. located?
The NPPES record lists a practice address at 393 E Walnut St, Pasadena, CA, 91188. Phone: (866) 205-3595. Providers update this record themselves, so call before visiting.
How can I verify Steven Co, D.O.'s license?
NPPES lists California license number 20A16723, 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 Steven Co, D.O. prescribe under Medicare Part D?
In 2024, Steven Co, D.O. had 1,130 Medicare Part D claims for 180 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.