Harpreet Singh Grewal, M.D.
Adult Medicine Physician · Tracy, CA
Harpreet Singh Grewal, M.D. is an adult medicine physician with a practice address in Tracy, California, and NPI 1700842697, issued on Apr 21, 2006. Check the license (California A40558, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Harpreet Singh Grewal
- Credential
- M.D.
- Primary taxonomy
- Adult Medicine Physician 207QA0505X
- License number
- A40558 CA
Self-reported in NPPES; status is on the state search - Practice location
- 530 W Eaton Ave Ste K, Tracy, CA 95376
- Phone
- (209) 835-4232
- Enumerated
- Apr 21, 2006
- Record last updated
- Apr 1, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (209) 835-3246
- Medicaid ID
- 00A405580 CA
- Medicare enrollment
- Enrolled (PECOS I20110207000122); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 530 W Eaton Ave Ste K
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Maria-Tereza Gamulo-Owen, FNPRegistered Nurse1124144472
Verify Harpreet Singh Grewal in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A40558Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% more Medicare Part D claims than the average adult medicine physician in 2024
5,772 Medicare Part D claims for 391 beneficiaries, against an average of 3,002 among the 1,307 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 366 claims were for opioids.
Most prescribed
- Rosuvastatin Calcium333 claims
- Hydrocodone-Acetaminophen268 claims
- Atorvastatin Calcium259 claims
- Metformin Hcl257 claims
- Amlodipine Besylate235 claims
- Levothyroxine Sodium153 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: $1,108.62
58 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 664 providers of this specialty with any payment received $1,405.95 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
- Grewal Medical Associates IncTracy, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Adult Medicine Physician providers in California
There are 386 adult medicine physician records in California.
Other adult medicine physician records in California
- Mina Abazari, M.D.Laguna Beach, CA1417012444
- Marie Agleham, MDUnion City, CA1649298209
- Ahmad Ahmadzia, M.D.Fair Oaks, CA1023431152
- Dina Al-RabadiSanta Monica, CA1386271682
- James Aldrich, MDLa Jolla, CA1730290016
- John Alevizos, DOIrvine, CA1689671380
- Maryin Altamirano, MDBeaumont, CA1720575988
- Gail Altschuler, M.D.Novato, CA1972642098
- Ricardo Alvarez, MDSan Francisco, CA1649352626
- Ria Andrade, M.D.La Habra, CA1093159493
Common questions
What is Harpreet Singh Grewal, M.D.'s NPI number?
Harpreet Singh Grewal, M.D.'s National Provider Identifier (NPI) is 1700842697, issued on Apr 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Harpreet Singh Grewal, M.D. located?
The NPPES record lists a practice address at 530 W Eaton Ave Ste K, Tracy, CA, 95376. Phone: (209) 835-4232. Providers update this record themselves, so call before visiting.
How can I verify Harpreet Singh Grewal, M.D.'s license?
NPPES lists California license number A40558, 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 Harpreet Singh Grewal, M.D. prescribe under Medicare Part D?
In 2024, Harpreet Singh Grewal, M.D. had 5,772 Medicare Part D claims for 391 beneficiaries; the average among adult medicine physician prescribers was 3,002. 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.