Marielle Andrea Barretto Llamas, MD
Internal Medicine Physician · Sacramento, CA
Marielle Andrea Barretto Llamas, MD is an internal medicine physician with a practice address in Sacramento, California, and NPI 1205419025, issued on Apr 29, 2021. Check the license on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Marielle Andrea Barretto Llamas
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- PG205477 OR
Self-reported in NPPES; status is on the state search - Practice location
- 4301 X St, Sacramento, CA 95817
- Phone
- (916) 734-2011
- Enumerated
- Apr 29, 2021
- Record last updated
- Jul 8, 2026
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 4301 X St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Marielle Andrea Barretto Llamas in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of CaliforniaCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average internal medicine physician in 2024
271 Medicare Part D claims for 36 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium26 claims
- Losartan Potassium20 claims
- Amlodipine Besylate19 claims
- Rosuvastatin Calcium18 claims
- Lisinopril17 claims
- Pantoprazole Sodium15 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.
Industry payments in 2024: $122.31
1 payment: food and beverage; the largest payer was Travere Therapeutics, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Marielle Andrea Barretto Llamas among 17,696 internal medicine physician records in California
Marielle Andrea Barretto Llamas, MD 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 2021, is newer than 92% of them.
- NPI issued2021 · 92% of these records are older, 5% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2026 · 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).
601 internal medicine physician records list a practice address in Sacramento
They are 601 of the 33,083 NPPES records with a practice address in Sacramento, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Sacramento → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
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- Lynne Do, M.D.Sacramento, CA 958171386627644
- Jason Ferries, M.D.Sacramento, CA 958171609859974
- Steven Griffen, M.D.Sacramento, CA 958171053393835
- Diane Haddock, M.D.Sacramento, CA 958171013991553
- Calvin Hirsch, MDSacramento, CA 958171073597332
- Hershan Johl, MDSacramento, CA 958171255314399
Common questions
What is Marielle Andrea Barretto Llamas, MD's NPI number?
Marielle Andrea Barretto Llamas, MD's National Provider Identifier (NPI) is 1205419025, issued on Apr 29, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Marielle Andrea Barretto Llamas, MD located?
The NPPES record lists a practice address at 4301 X St, Sacramento, CA, 95817. Phone: (916) 734-2011. Providers update this record themselves, so call before visiting.
How can I verify Marielle Andrea Barretto Llamas, MD's license?
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 Marielle Andrea Barretto Llamas, MD prescribe under Medicare Part D?
In 2024, Marielle Andrea Barretto Llamas, MD had 271 Medicare Part D claims for 36 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.