Harkiran Grewal, MD
NPI 1790022416 · Infectious Disease Physician · Castro Valley, CA
Enrolled with Medicare as Practitioner - Infectious Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Harkiran Grewal, MD is a Infectious Disease Physician provider in Castro Valley, CA (NPI 1790022416).
Provider details
- NPI number
- 1790022416
- Entity type
- Individual
- Primary specialty
- Infectious Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- MD044631 (DC)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
13 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 · 11 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Cephalexin | 40 |
| Levofloxacin | 24 |
| Cefdinir | 21 |
| Doxycycline Hyclate | 21 |
| Ceftriaxone Sodiumbrand: Ceftriaxone | 17 |
| Nitrofurantoin Monohyd/M-Crystbrand: Nitrofurantoin Mono-Macro | 17 |
| Isavuconazonium Sulfatebrand: Cresemba | 15 |
| Rifampin | 14 |
| Fluconazole | 13 |
| Cefepime Hcl | 12 |
These counts cover prescriptions paid through Medicare Part D in 2024 — they include cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$328 across 13 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2013-01-15
- Last updated
- 2022-07-21
Frequently asked questions
- What is Harkiran Grewal's NPI number?
- Harkiran Grewal's National Provider Identifier (NPI) is 1790022416, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Harkiran Grewal's specialty?
- Harkiran Grewal is listed in the NPPES registry with a primary specialty of Infectious Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Harkiran Grewal located?
- Harkiran Grewal's practice location on file with NPPES is 20400 Lake Chabot Rd Ste 102, Castro Valley, CA 94546-5314.
- What is Harkiran Grewal's phone number?
- The practice phone number listed in the NPPES registry for Harkiran Grewal is (202) 444-0086.
- Does Harkiran Grewal accept Medicare?
- Harkiran Grewal is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Harkiran Grewal's NPI active?
- Yes — Harkiran Grewal's NPI (1790022416) is active in the NPPES registry as of the last update on 2022-07-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.