Sean S. Grewal, M.D.
Hospitalist Physician · Los Angeles, CA
Sean S. Grewal, M.D. is a hospitalist physician with a practice address in Los Angeles, California, and NPI 1871980102, issued on Apr 24, 2015. Check the license (California A147942, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Sean S. Grewal
- Credential
- M.D.
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- A147942 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1500 San Pablo St, Los Angeles, CA 90033
- Phone
- (323) 442-5100
- Enumerated
- Apr 24, 2015
- Record last updated
- Jan 17, 2024
- Medicare enrollment
- Enrolled (PECOS I20190423001381); accepts Medicare assignment
- Medical or professional school
- Saint Louis University School Of Medicine, 2015
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 3,099 in California → Look up another NPI →
Also registered at 1500 San Pablo St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Hadi Abou El Hassan, MDNeurology Physician1053995720
- Taaha Adamji, MDStudent in an Organized Health Care Education/Training Program1770414377
- Nikhil AggarwalStudent in an Organized Health Care Education/Training Program1144029596
Verify Sean S. Grewal in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A147942Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
46% fewer Medicare Part D claims than the average hospitalist physician in 2024
283 Medicare Part D claims for 142 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims.
Most prescribed
- Cefpodoxime Proxetil36 claims
- Eliquis15 claims
- Furosemide13 claims
- Clopidogrel12 claims
- Prednisone11 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.
Bills Medicare through one group practice
- Southern California Permanente Medical GroupIrvine, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sean S. Grewal among 3,099 hospitalist physician records in California
Sean S. Grewal, M.D. is one of 3,099 hospitalist physician records with a practice address in California. 90% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 66% of them.
- NPI issued2015 · 66% of these records are older, 30% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 81% of these records are
- Graduated2015 · median 2010 among the 2,505 with a school on file
- Record last updated2024 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in California
There are 3,099 hospitalist physician records in California.
All 3,099 in California → Every provider in Los Angeles → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Ravneet Bajwa, M.D.Los Angeles, CA 900331194099754
- Douglass Hutcheon, MDLos Angeles, CA 900331427347640
- Matthew Johnson, M.D.Los Angeles, CA 900331043598741
- Ronald Kall, MDLos Angeles, CA 900331548531965
- Mahmood Khaledy, M.D.Los Angeles, CA 900331740418441
- Shazia Khan, M.D.Los Angeles, CA 900331336389139
- Edward Lee, MD, MPHLos Angeles, CA 900331528350261
- Anna Martinez, M.D.Los Angeles, CA 900331811287030
Common questions
What is Sean S. Grewal, M.D.'s NPI number?
Sean S. Grewal, M.D.'s National Provider Identifier (NPI) is 1871980102, issued on Apr 24, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Sean S. Grewal, M.D. located?
The NPPES record lists a practice address at 1500 San Pablo St, Los Angeles, CA, 90033. Phone: (323) 442-5100. Providers update this record themselves, so call before visiting.
How can I verify Sean S. Grewal, M.D.'s license?
NPPES lists California license number A147942, 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 Sean S. Grewal, M.D. prescribe under Medicare Part D?
In 2024, Sean S. Grewal, M.D. had 283 Medicare Part D claims for 142 beneficiaries; the average among hospitalist physician prescribers was 521. 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.