William J. Linnik, MD
Emergency Medicine Physician · La Mesa, CA
William J. Linnik, MD is an emergency medicine physician with a practice address in La Mesa, California, and NPI 1871526327, issued on Jul 8, 2006. Check the license (California G64880, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- William J. Linnik
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- G64880 CA
Self-reported in NPPES; status is on the state search - Practice location
- 5555 Grossmont Center Drive, La Mesa, CA 91942
- Phone
- (619) 644-4401
- Enumerated
- Jul 8, 2006
- Record last updated
- Dec 15, 2009 (not updated in 17 years: call before relying on the address or phone)
- Medicaid ID
- 00G648800 CA
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 5555 Grossmont Center Drive
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Donald Butera, MDEmergency Medicine Physician1699783233
- Kellie Freeborn, NPEmergency Medicine Physician1841220860
- Kevin KellyEmergency Medicine Physician1811924764
- Dustin Nguyen, PHARM.D.Pharmacist1023545779
- Susan Van Nordheim, NPNurse Practitioner1841304508
- Hung Vu, MDEmergency Medicine Physician1487795811
Verify William J. Linnik in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G64880Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
William J. Linnik among 7,751 emergency medicine physician records in California
William J. Linnik, MD is one of 7,751 emergency medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 4% of them.
- NPI issued2006 · 4% of these records are older, 60% newer
- In a Medicare fileNo · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 59% of these records are
- Record last updated2009 · 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 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
42 emergency medicine physician records list a practice address in La Mesa
They are 42 of the 2,168 NPPES records with a practice address in La Mesa, and 7,751 emergency medicine physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 7,751 in California → Every provider in La Mesa → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Brook Beall, MDLa Mesa, CA 919421508803529
- Brent Butcher, MDLa Mesa, CA 919421861413700
- Kellie Freeborn, NPLa Mesa, CA 919421841220860
- Erwin Handley, MDLa Mesa, CA 919421871536631
- Kevin KellyLa Mesa, CA 919421811924764
- Swathi Lavu-Rao, MDLa Mesa, CA 919421497789630
- Brendan Lee, DOLa Mesa, CA 919421033146022
- Eleni Pentheroudakis, MDLa Mesa, CA 919421952349987
Common questions
What is William J. Linnik, MD's NPI number?
William J. Linnik, MD's National Provider Identifier (NPI) is 1871526327, issued on Jul 8, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William J. Linnik, MD located?
The NPPES record lists a practice address at 5555 Grossmont Center Drive, La Mesa, CA, 91942. Phone: (619) 644-4401. Providers update this record themselves, so call before visiting.
How can I verify William J. Linnik, MD's license?
NPPES lists California license number G64880, 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. 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.