Carrie Riopel Mousseau, M.D.
Internal Medicine Physician · Los Altos, CA
Carrie Riopel Mousseau, M.D. is an internal medicine physician with a practice address in Los Altos, California, and NPI 1447387451, issued on Feb 27, 2007. Check the license (California A69538, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Carrie Riopel Mousseau
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A69538 CA
Self-reported in NPPES; status is on the state search - Practice location
- 895 Sherwood Ave Ste 100, Los Altos, CA 94022
- Phone
- (650) 888-5790
- Enumerated
- Feb 27, 2007
- Record last updated
- Jan 7, 2025
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify Carrie Riopel Mousseau in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A69538Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
23 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Liothyronine Sodium11 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.
Carrie Riopel Mousseau among 17,696 internal medicine physician records in California
Carrie Riopel Mousseau, 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 2007, is newer than 44% of them.
- NPI issued2007 · 44% of these records are older, 44% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2025 · 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).
29 internal medicine physician records list a practice address in Los Altos
They are 29 of the 718 NPPES records with a practice address in Los Altos, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Los Altos → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Bhanu-Rekha Bhaskar, MDLos Altos, CA 940221932273539
- Jacqueline Denkabe, MDLos Altos, CA 940221194883520
- Jessica Favreau, MDLos Altos, CA 940221841450731
- Julia Fong, MDLos Altos, CA 940221154409746
- Francis Lastufka, MDLos Altos, CA 940221144312141
- Janusz Madej, M.D.Los Altos, CA 940221376616706
- Amy Muzaffar, MDLos Altos, CA 940221124191481
- Gina Serraiocco, MDLos Altos, CA 940221063504553
Common questions
What is Carrie Riopel Mousseau, M.D.'s NPI number?
Carrie Riopel Mousseau, M.D.'s National Provider Identifier (NPI) is 1447387451, issued on Feb 27, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Carrie Riopel Mousseau, M.D. located?
The NPPES record lists a practice address at 895 Sherwood Ave Ste 100, Los Altos, CA, 94022. Phone: (650) 888-5790. Providers update this record themselves, so call before visiting.
How can I verify Carrie Riopel Mousseau, M.D.'s license?
NPPES lists California license number A69538, 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 Carrie Riopel Mousseau, M.D. prescribe under Medicare Part D?
In 2024, Carrie Riopel Mousseau, M.D. had 23 Medicare Part D claims; 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.