Brian Barrios Ayuste, M.D.
Internal Medicine Physician · Granada Hills, CA
Brian Barrios Ayuste, M.D. is an internal medicine physician with a practice address in Granada Hills, California, and NPI 1104003458, issued on Jan 29, 2008. Check the license (California A99851, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Brian Barrios Ayuste
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A99851 CA
Self-reported in NPPES; status is on the state search - Practice location
- 10605 Balboa Blvd, Granada Hills, CA 91344
- Phone
- (818) 366-4626
- Enumerated
- Jan 29, 2008
- Record last updated
- Jan 28, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (818) 366-4630
- Medicare enrollment
- Enrolled (PECOS I20110927000244); accepts Medicare assignment
- Medical or professional school
- Loyola University Of Chicago, Stritch School Of Medicine, 2005
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 10605 Balboa Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Herbert Anderson Jr.Day Training/Habilitation Specialist1578642062
- Vinod Assomull, MDNephrology Physician1982619359
- Patricia Attalla, R.N.Psychiatric/Mental Health Registered Nurse1609934215
- Carla AvalosClinical Social Worker1437485646
Verify Brian Barrios Ayuste in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A99851Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
8% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,921 Medicare Part D claims for 339 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims.
Most prescribed
- Hydralazine Hcl266 claims
- Tamsulosin Hcl166 claims
- Furosemide138 claims
- Amlodipine Besylate132 claims
- Allopurinol118 claims
- Nifedipine Er108 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: $1,391.12
58 payments; by number, the most common kind was food and beverage; the largest payer was Amgen 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.
Bills Medicare through one group practice
- Renal Consultants Medical GroupNewhall, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Brian Barrios Ayuste among 17,696 internal medicine physician records in California
Brian Barrios Ayuste, 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 2008, is newer than 56% of them.
- NPI issued2008 · 56% of these records are older, 40% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2005 · median 2004 among the 11,065 with a school on file
- Record last updated2014 · 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).
Internal Medicine Physician providers in California
There are 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Granada Hills → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Elaheh Farhadian, M.D.Granada Hills, CA 913441316145956
- Richard Park, M.D.Granada Hills, CA 913441174718134
- Neeraj Patel, M.D.Granada Hills, CA 913441679830756
- Paolo Rivera, M.D.Granada Hills, CA 913441740635291
- Olivia Arreola-Owen, MDNorth Hills, CA 913431194003079
- Bevanne Bean-Mayberry, MDSepulveda, CA 913431528163888
- Joseph Chambers, MD.Mission Hills, CA 913451467435297
- Tammy Chuang, MDNorth Hills, CA 913431801399670
Common questions
What is Brian Barrios Ayuste, M.D.'s NPI number?
Brian Barrios Ayuste, M.D.'s National Provider Identifier (NPI) is 1104003458, issued on Jan 29, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Brian Barrios Ayuste, M.D. located?
The NPPES record lists a practice address at 10605 Balboa Blvd, Granada Hills, CA, 91344. Phone: (818) 366-4626. Providers update this record themselves, so call before visiting.
How can I verify Brian Barrios Ayuste, M.D.'s license?
NPPES lists California license number A99851, 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 Brian Barrios Ayuste, M.D. prescribe under Medicare Part D?
In 2024, Brian Barrios Ayuste, M.D. had 2,921 Medicare Part D claims for 339 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.