Harsharn Grewal, M.D.
NPI 1689310997 · Internal Medicine Physician · Toledo, OH
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Harsharn Grewal, M.D. is a Internal Medicine Physician provider in Toledo, OH (NPI 1689310997).
Provider details
- NPI number
- 1689310997
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
4 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 18 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 49 | 14 |
| Amlodipine Besylate | 36 | — |
| Losartan Potassium | 32 | — |
| Hydrochlorothiazide | 22 | — |
| Metformin Hcl | 22 | — |
| Carvedilol | 21 | — |
| Omeprazole | 18 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2022-05-10
- Last updated
- 2025-06-04
- Certified
- 2025-06-04
Frequently asked questions
- What is Harsharn Grewal's NPI number?
- Harsharn Grewal's National Provider Identifier (NPI) is 1689310997, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Harsharn Grewal's specialty?
- Harsharn Grewal is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Harsharn Grewal located?
- Harsharn Grewal's practice location on file with NPPES is 2213 Franklin Ave, Toledo, OH 43620.
- What is Harsharn Grewal's phone number?
- The practice phone number listed in the NPPES registry for Harsharn Grewal is (419) 251-2360.
- Does Harsharn Grewal accept Medicare?
- Harsharn Grewal is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Harsharn Grewal's NPI active?
- Yes — Harsharn Grewal's NPI (1689310997) is active in the NPPES registry as of the last update on 2025-06-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.