Mark Dy-Liacco, MD
Surgery Physician · Pleasanton, CA
Mark Dy-Liacco, MD is a surgery physician with a practice address in Pleasanton, California, and NPI 1366488850, issued on Jun 21, 2006. Check the license (California G192769, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mark Dy-Liacco
- Credential
- MD
- Primary taxonomy
- Surgery Physician 208600000X
- License number
- G192769 CA
Self-reported in NPPES; status is on the state search - Practice location
- 5555 W Las Positas Blvd, Pleasanton, CA 94588
- Phone
- (925) 416-3440
- Enumerated
- Jun 21, 2006
- Record last updated
- Jan 14, 2025
- Medicare enrollment
- Enrolled (PECOS I20240807004475); accepts Medicare assignment
- Medical or professional school
- Medical College Of Wisconsin, 1992
- Entity
- Type 1 · individual
8 nearest surgery physician records → All 3,118 in California → Look up another NPI →
Also registered at 5555 W Las Positas Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Brooke BettsPharmacist1962178491
- Myrna Castelazo, M.D.Diagnostic Radiology Physician1407290513
Verify Mark Dy-Liacco in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G192769Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2 hospitals and group practices
- Stanford Health CareStanford, CA · Acute Care Hospitals5 of 5 stars
- House MedicineLancaster, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Mark Dy-Liacco among 3,118 surgery physician records in California
Mark Dy-Liacco, MD is one of 3,118 surgery physician records with a practice address in California. 75% 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 6% of them.
- NPI issued2006 · 6% of these records are older, 55% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated1992 · median 2003 among the 1,901 with a school on file
- Record last updated2025 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208600000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgery Physician providers in California
There are 3,118 surgery physician records in California.
All 3,118 in California → Every provider in Pleasanton → Surgery Physician nationwide →
The 8 surgery physician records with the nearest ZIP codes
- Chau Dang, MDPleasanton, CA 945881649213398
- Mary Estakhri, MDPleasanton, CA 945881467579763
- John Gahagan, M.D.Pleasanton, CA 945881558629493
- Carlos Gracia, MDPleasanton, CA 945881972525053
- Michael Gynn, MDPleasanton, CA 945881366462491
- Kevin Izquierdo, MDPleasanton, CA 945881922361641
- Samuel Liu, MDPleasanton, CA 945881790863884
- Raman Nambisan, MDPleasanton, CA 945881154358992
Common questions
What is Mark Dy-Liacco, MD's NPI number?
Mark Dy-Liacco, MD's National Provider Identifier (NPI) is 1366488850, issued on Jun 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark Dy-Liacco, MD located?
The NPPES record lists a practice address at 5555 W Las Positas Blvd, Pleasanton, CA, 94588. Phone: (925) 416-3440. Providers update this record themselves, so call before visiting.
How can I verify Mark Dy-Liacco, MD's license?
NPPES lists California license number G192769, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
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.