Brittany Doremus, D.O.
Internal Medicine Physician · Pasadena, CA
Brittany Doremus, D.O. is an internal medicine physician with a practice address in Pasadena, California, and NPI 1477829661, issued on Apr 1, 2012. Check the license (California 20A12983, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Brittany Doremus
- Credential
- D.O.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 20A12983 CA
Self-reported in NPPES; status is on the state search - Practice location
- 393 E Walnut St, Pasadena, CA 91188
- Phone
- (909) 427-5000
- Enumerated
- Apr 1, 2012
- Record last updated
- Dec 1, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20161104000516); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 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.
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- Leona Bell, RN CRNPPediatrics Physician1457342941
Verify Brittany Doremus in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A12983Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
80% fewer Medicare Part D claims than the average internal medicine physician in 2024
646 Medicare Part D claims for 107 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 4% of claims. 307 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen77 claims
- Pregabalin76 claims
- Methadone Hcl50 claims
- Hydromorphone Hcl49 claims
- Fentanyl43 claims
- Mirtazapine42 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 GroupWoodland Hills, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Brittany Doremus among 17,696 internal medicine physician records in California
Brittany Doremus, D.O. is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 68% of them.
- NPI issued2012 · 68% of these records are older, 29% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2012 · median 2004 among the 11,065 with a school on file
- Record last updated2021 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
137 internal medicine physician records list a practice address in Pasadena
They are 137 of the 10,525 NPPES records with a practice address in Pasadena, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Pasadena → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Annapoorani AsokanPasadena, CA 911881750083960
- Radha Bhargava-Gupta, MDPasadena, CA 911881457365512
- Susan Fleischman, M.D.Pasadena, CA 911881609919075
- Mikhail Blinchik, M.D.Glendale, CA 912011225255201
- Laila Hanna, M.D.Glendale, CA 912011942348255
- Issam Khafaja, M.D.Glendale, CA 912011528062874
- Gevork Maissian, D.O.Glendale, CA 912011639320658
- Mehdi RazeghiGlendale, CA 912011063454510
Common questions
What is Brittany Doremus, D.O.'s NPI number?
Brittany Doremus, D.O.'s National Provider Identifier (NPI) is 1477829661, issued on Apr 1, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Brittany Doremus, D.O. located?
The NPPES record lists a practice address at 393 E Walnut St, Pasadena, CA, 91188. Phone: (909) 427-5000. Providers update this record themselves, so call before visiting.
How can I verify Brittany Doremus, D.O.'s license?
NPPES lists California license number 20A12983, 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 Brittany Doremus, D.O. prescribe under Medicare Part D?
In 2024, Brittany Doremus, D.O. had 646 Medicare Part D claims for 107 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.