NPPES file of Aug 9, 2026

Doris Maria Rivas, M.D.

Internal Medicine Physician · Downey, CA

Doris Maria Rivas, M.D. is an internal medicine physician with a practice address in Downey, California, and NPI 1043699374, issued on May 19, 2015. Check the license (California A168846, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1043699374
Name
Doris Maria Rivas
Credential
M.D.
Primary taxonomy
Internal Medicine Physician 207R00000X
License numbers
A168846 CA
MD464810 PA
MT208919 PA
Self-reported in NPPES; status is on the state search
Practice location
9333 Imperial Hwy, Downey, CA 90242
Phone
(833) 574-2273
Enumerated
May 19, 2015
Record last updated
Nov 30, 2021 (not updated in 5 years: call before relying on the address or phone)
Medicare enrollment
Enrolled (PECOS I20210322002024); accepts Medicare assignment
Medical or professional school
New York Medical College, 2015
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →

Also registered at 9333 Imperial Hwy

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Gemma AbadPlastic Surgery Registered Nurse1740017649
  2. Omar Ahmed, M.D.Anesthesiology Physician1831439231
  3. Fataneh Amidi, MDObstetrics & Gynecology Physician1134357981
  4. Fariba Amini, RCPRegistered Respiratory Therapist1962984302
  5. Orland AndayaRegistered Respiratory Therapist1598247751
  6. Michelle Andersen, D.P.T.Physical Therapist1295165231

Verify Doris Maria Rivas in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A168846    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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89% fewer Medicare Part D claims than the average internal medicine physician in 2024

336 Medicare Part D claims for 116 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 15 claims were for opioids.

  1. Doris Rivas336
  2. Specialty average3,176

Most prescribed

  1. Cefpodoxime Proxetil26 claims
  2. Furosemide14 claims
  3. Doxycycline Monohydrate12 claims
  4. Albuterol Sulfate Hfa11 claims
  5. Atorvastatin Calcium11 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

  1. Southern California Permanente Medical GroupDowney, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Doris Maria Rivas among 17,696 internal medicine physician records in California

Doris Maria Rivas, M.D. 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 2015, is newer than 76% of them.

  • NPI issued2015 · 76% of these records are older, 21% newer
  • In a Medicare fileYes · 79% of these records are
  • In the CMS Doctors and Clinicians fileYes · 63% of these records are
  • Graduated2015 · 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).

114 internal medicine physician records list a practice address in Downey

They are 114 of the 3,607 NPPES records with a practice address in Downey, and 17,696 internal medicine physician records in California.

All 17,696 in California → Every provider in Downey → Internal Medicine Physician nationwide →

The 8 internal medicine physician records with the nearest ZIP codes

  1. Sohail Afra, M.D.Downey, CA 902421023125176
  2. Ron Chai, M.D.Downey, CA 902421447361316
  3. Ronald Collins, M.D.Downey, CA 902421235176181
  4. Rashmi Desai, M.D.Downey, CA 902421801990247
  5. Basuki Gunawan, M.D.Downey, CA 902421346352473
  6. Danese Hayes, M.D.Downey, CA 902421689786733
  7. Goethe Hsu, M.D.Downey, CA 902421386656726
  8. Diana Hsu, M.D.Downey, CA 902421720090137

Common questions

What is Doris Maria Rivas, M.D.'s NPI number?

Doris Maria Rivas, M.D.'s National Provider Identifier (NPI) is 1043699374, issued on May 19, 2015. An NPI identifies a provider in billing; it is not a license.

Where is Doris Maria Rivas, M.D. located?

The NPPES record lists a practice address at 9333 Imperial Hwy, Downey, CA, 90242. Phone: (833) 574-2273. Providers update this record themselves, so call before visiting.

How can I verify Doris Maria Rivas, M.D.'s license?

NPPES lists California license number A168846, 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 Doris Maria Rivas, M.D. prescribe under Medicare Part D?

In 2024, Doris Maria Rivas, M.D. had 336 Medicare Part D claims for 116 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.