Mark Lillo, MD
NPI 1497831325 · Infectious Disease Physician · Santa Clara, CA
Enrolled with Medicare as Practitioner - Infectious Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Lillo, MD is a Infectious Disease Physician provider in Santa Clara, CA (NPI 1497831325).
Provider details
- NPI number
- 1497831325
- Entity type
- Individual
- Primary specialty
- Infectious Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A41175 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% 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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-31
- Last updated
- 2007-07-08
Frequently asked questions
- What is Mark Lillo's NPI number?
- Mark Lillo's National Provider Identifier (NPI) is 1497831325, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Lillo's specialty?
- Mark Lillo is listed in the NPPES registry with a primary specialty of Infectious Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Lillo located?
- Mark Lillo's practice location on file with NPPES is 710 Lawrence Expy, Santa Clara, CA 95051-5173.
- What is Mark Lillo's phone number?
- The practice phone number listed in the NPPES registry for Mark Lillo is (408) 851-1000.
- Does Mark Lillo accept Medicare?
- Mark Lillo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Lillo's NPI active?
- Yes — Mark Lillo's NPI (1497831325) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.