Sabrina Grassl Diaz, MD
Emergency Medicine Physician · Santa Monica, CA
Sabrina Grassl Diaz, MD is an emergency medicine physician with a practice address in Santa Monica, California, and NPI 1609800622, issued on Jul 10, 2006. Check the license (California A72139, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Sabrina Grassl Diaz
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- A72139 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1328 Twenty Second St, Santa Monica, CA 90404
- Phone
- (310) 582-7089
- Enumerated
- Jul 10, 2006
- Record last updated
- Apr 8, 2010 (not updated in 16 years: call before relying on the address or phone)
- Medicaid ID
- 00A721390 CA
- Medicare enrollment
- Enrolled (PECOS I20040212000975); accepts Medicare assignment
- Medical or professional school
- Saint Louis University School Of Medicine, 1998
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 1328 Twenty Second St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Daniel Grossman, MDEmergency Medicine Physician1386601326
Verify Sabrina Grassl Diaz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A72139Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
23% fewer Medicare Part D claims than the average emergency medicine physician in 2024
173 Medicare Part D claims for 136 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
Most prescribed
- Cephalexin26 claims
- Azithromycin16 claims
- Albuterol Sulfate Hfa12 claims
- Ondansetron Odt12 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: $154.09
2 payments; by number, the most common kind was food and beverage; the largest payer was Amgen Inc. The 12,335 providers of this specialty with any payment received $953.79 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
- Providence Saint Johns Medical FoundationSanta Monica, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sabrina Grassl Diaz among 7,751 emergency medicine physician records in California
Sabrina Grassl Diaz, MD is one of 7,751 emergency medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 4% of them.
- NPI issued2006 · 4% of these records are older, 60% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated1998 · median 2011 among the 4,560 with a school on file
- Record last updated2010 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in California
There are 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Santa Monica → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Isaac Bash, MDSanta Monica, CA 904041619934643
- Victor Candioty, MDSanta Monica, CA 904041437116472
- Michelle Charfen, M.D.Santa Monica, CA 904041588602486
- Edward Cotner, MDSanta Monica, CA 904041023074044
- Patricia Drum-Lal, PACSanta Monica, CA 904041639136674
- Walid Ghurabi, D.O.Santa Monica, CA 904041073566931
- Daniel Grossman, MDSanta Monica, CA 904041386601326
- Amy Kijner, PASanta Monica, CA 904041235197849
Common questions
What is Sabrina Grassl Diaz, MD's NPI number?
Sabrina Grassl Diaz, MD's National Provider Identifier (NPI) is 1609800622, issued on Jul 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Sabrina Grassl Diaz, MD located?
The NPPES record lists a practice address at 1328 Twenty Second St, Santa Monica, CA, 90404. Phone: (310) 582-7089. Providers update this record themselves, so call before visiting.
How can I verify Sabrina Grassl Diaz, MD's license?
NPPES lists California license number A72139, 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 Sabrina Grassl Diaz, MD prescribe under Medicare Part D?
In 2024, Sabrina Grassl Diaz, MD had 173 Medicare Part D claims for 136 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.