Monica Cristina Abreu Diaz
Internal Medicine Physician · Los Angeles, CA
Monica Cristina Abreu Diaz is an internal medicine physician with a practice address in Los Angeles, California, and NPI 1598294126, issued on Jun 7, 2017. Check the license (California A186278, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Monica Cristina Abreu Diaz
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A186278 CA
Self-reported in NPPES; status is on the state search - Practice location
- 200 Ucla Medical Plz Ste 420, Los Angeles, CA 90095
- Phone
- (310) 206-6232
- Enumerated
- Jun 7, 2017
- Record last updated
- Oct 2, 2023
- Medicare enrollment
- Enrolled (PECOS I20230816003349); accepts Medicare assignment
- Medical or professional school
- University Of Puerto Rico School Of Medicine, 2019
- Entity
- Type 1 · individual
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Also registered at 200 Ucla Medical Plz Ste 420
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Monica Cristina Abreu Diaz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A186278Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
67% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,046 Medicare Part D claims for 230 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims.
Most prescribed
- Amlodipine Besylate60 claims
- Atorvastatin Calcium54 claims
- Rosuvastatin Calcium49 claims
- Fluticasone Propionate48 claims
- Levothyroxine Sodium36 claims
- Lidocaine27 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 86.1 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- The Los Angeles Free ClinicLos Angeles, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Monica Cristina Abreu Diaz among 17,696 internal medicine physician records in California
Monica Cristina Abreu Diaz 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 2017, is newer than 81% of them.
- NPI issued2017 · 81% of these records are older, 16% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2019 · median 2004 among the 11,065 with a school on file
- Record last updated2023 · 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).
1,423 internal medicine physician records list a practice address in Los Angeles
They are 1,423 of the 69,537 NPPES records with a practice address in Los Angeles, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Los Angeles → Internal Medicine Physician nationwide →
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- Arleen Brown, MDLos Angeles, CA 900951720013618
- Richard Buyalos, MDLos Angeles, CA 900951720012123
- Basit Chaudhry, MDLos Angeles, CA 900951992739460
Common questions
What is Monica Cristina Abreu Diaz's NPI number?
Monica Cristina Abreu Diaz's National Provider Identifier (NPI) is 1598294126, issued on Jun 7, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Monica Cristina Abreu Diaz located?
The NPPES record lists a practice address at 200 Ucla Medical Plz Ste 420, Los Angeles, CA, 90095. Phone: (310) 206-6232. Providers update this record themselves, so call before visiting.
How can I verify Monica Cristina Abreu Diaz's license?
NPPES lists California license number A186278, 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 Monica Cristina Abreu Diaz prescribe under Medicare Part D?
In 2024, Monica Cristina Abreu Diaz had 1,046 Medicare Part D claims for 230 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Monica Cristina Abreu Diaz's MIPS final score?
The 2023 MIPS final score is 86.1 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.