Mark Varallo, DO
NPI 1588722946 · Family Medicine Physician · Whittier, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Varallo, DO is a Family Medicine Physician provider in Whittier, CA (NPI 1588722946).
Provider details
- NPI number
- 1588722946
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 20A8108 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
19 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 · 30 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Metformin Hcl | 124 | 40 |
| Lisinopril | 99 | 37 |
| Atorvastatin Calcium | 83 | 32 |
| Amlodipine Besylate | 76 | 31 |
| Omeprazole | 68 | 17 |
| Losartan Potassium | 66 | 19 |
| Rosuvastatin Calcium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$21 across 1 record (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
- 2006-12-05
- Last updated
- 2011-07-28
Frequently asked questions
- What is Mark Varallo's NPI number?
- Mark Varallo's National Provider Identifier (NPI) is 1588722946, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Varallo's specialty?
- Mark Varallo is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Varallo located?
- Mark Varallo's practice location on file with NPPES is 15733 Whittier Blvd, Whittier, CA 90603-2312.
- What is Mark Varallo's phone number?
- The practice phone number listed in the NPPES registry for Mark Varallo is (562) 947-7754.
- Does Mark Varallo accept Medicare?
- Mark Varallo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Varallo's NPI active?
- Yes — Mark Varallo's NPI (1588722946) is active in the NPPES registry as of the last update on 2011-07-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.