Marissa Lyn Brown, M.D.
Obstetrics & Gynecology Physician · El Cajon, CA
Marissa Lyn Brown, M.D. is an obstetrics & gynecology physician with a practice address in El Cajon, California, and NPI 1457616997, issued on Jul 11, 2012. Check the license (California A142166, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Marissa Lyn Brown
- Credential
- M.D.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License numbers
- A142166 CA
207ZP0102X AZ
Self-reported in NPPES; status is on the state search - Practice location
- 250 Travelodge Drive, El Cajon, CA 92020
- Phone
- (619) 528-5000
- Enumerated
- Jul 11, 2012
- Record last updated
- Dec 22, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20160916002206); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Verify Marissa Lyn Brown in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A142166Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
9% more Medicare Part D claims than the average obstetrics & gynecology physician in 2024
180 Medicare Part D claims for 76 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 24% of claims.
Most prescribed
- Estradiol72 claims
- Climara25 claims
- Medroxyprogesterone Acetate18 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 GroupSan Diego, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marissa Lyn Brown among 5,088 obstetrics & gynecology physician records in California
Marissa Lyn Brown, M.D. is one of 5,088 obstetrics & gynecology physician records with a practice address in California. 74% 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 75% of them.
- NPI issued2012 · 75% of these records are older, 22% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2012 · median 2004 among the 2,700 with a school on file
- Record last updated2021 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in California
There are 5,088 obstetrics & gynecology physician records in California.
All 5,088 in California → Every provider in El Cajon → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Ayser Al-Mshhdani, MDEl Cajon, CA 920201679008569
- Edgar Bulloch, MDEl Cajon, CA 920201508046376
- Niloufer Dennis, M.D.El Cajon, CA 920201124217690
- Mary Sullivan, MDEl Cajon, CA 920201588893564
- Aliya Khan, MDEl Cajon, CA 920211285687350
- Katherine Austin, M.D.Encinitas, CA 920241003891482
- Robert Biter, M.D.Encinitas, CA 920241932169661
- Einat Duhamel, M.D.Encinitas, CA 920241114955119
Common questions
What is Marissa Lyn Brown, M.D.'s NPI number?
Marissa Lyn Brown, M.D.'s National Provider Identifier (NPI) is 1457616997, issued on Jul 11, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Marissa Lyn Brown, M.D. located?
The NPPES record lists a practice address at 250 Travelodge Drive, El Cajon, CA, 92020. Phone: (619) 528-5000. Providers update this record themselves, so call before visiting.
How can I verify Marissa Lyn Brown, M.D.'s license?
NPPES lists California license number A142166, 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 Marissa Lyn Brown, M.D. prescribe under Medicare Part D?
In 2024, Marissa Lyn Brown, M.D. had 180 Medicare Part D claims for 76 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. 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.