Diddarjit Grewal, M.D.
Internal Medicine Physician · Rochester, NY
Diddarjit Grewal, M.D. is an internal medicine physician with a practice address in Rochester, New York, and NPI 1912934647, issued on Jun 27, 2006. Check the license (New York 230824, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Diddarjit Grewal
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 230824 NY
Self-reported in NPPES; status is on the state search - Practice location
- 2655 Ridgeway Ave, Rochester, NY 14626
- Phone
- (585) 865-8210
- Enumerated
- Jun 27, 2006
- Record last updated
- Mar 3, 2015 (not updated in 11 years: call before relying on the address or phone)
- Medicaid ID
- 02586758 NY
- Medicare enrollment
- Enrolled (PECOS I20040514000072); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 12,067 in New York → Look up another NPI →
Also registered at 2655 Ridgeway Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Diddarjit Grewal in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 230824Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.0 times the Medicare Part D claims of the average internal medicine physician in 2024
12,685 Medicare Part D claims for 1,033 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 268 claims were for opioids.
Most prescribed
- Atorvastatin Calcium1,207 claims
- Lisinopril538 claims
- Hydrochlorothiazide515 claims
- Amlodipine Besylate513 claims
- Omeprazole436 claims
- Levothyroxine Sodium415 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 MIPS final score for 2023 (Medicare payment program): 95.2 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- The Unity Hospital OF RochesterRochester, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Diddarjit Grewal among 12,067 internal medicine physician records in New York
Diddarjit Grewal, M.D. is one of 12,067 internal medicine physician records with a practice address in New York. 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 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 53% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1996 · median 2002 among the 7,221 with a school on file
- Record last updated2015 · 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 New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
504 internal medicine physician records list a practice address in Rochester
They are 504 of the 20,520 NPPES records with a practice address in Rochester, and 12,067 internal medicine physician records in New York.
All 12,067 in New York → Every provider in Rochester → Internal Medicine Physician nationwide →
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Common questions
What is Diddarjit Grewal, M.D.'s NPI number?
Diddarjit Grewal, M.D.'s National Provider Identifier (NPI) is 1912934647, issued on Jun 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Diddarjit Grewal, M.D. located?
The NPPES record lists a practice address at 2655 Ridgeway Ave, Rochester, NY, 14626. Phone: (585) 865-8210. Providers update this record themselves, so call before visiting.
How can I verify Diddarjit Grewal, M.D.'s license?
NPPES lists New York license number 230824, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Diddarjit Grewal, M.D. prescribe under Medicare Part D?
In 2024, Diddarjit Grewal, M.D. had 12,685 Medicare Part D claims for 1,033 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Diddarjit Grewal, M.D.'s MIPS final score?
The 2023 MIPS final score is 95.2 of 100. 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.