James Lilja, M.D.
Gynecologic Oncology Physician · Campbell, CA
James Lilja, M.D. is a gynecologic oncology physician with a practice address in Campbell, California, and NPI 1225081441, issued on May 18, 2006. Check the license (California G85643, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- James Lilja
- Credential
- M.D.
- Primary taxonomy
- Gynecologic Oncology Physician 207VX0201X
- License number
- G85643 CA
Self-reported in NPPES; status is on the state search - Practice location
- 910 Campisi Way Ste 2A, Campbell, CA 95008
- Phone
- (408) 827-4274
- Enumerated
- May 18, 2006
- Record last updated
- Jul 17, 2026
- Fax
- (408) 827-4275
- Medicare enrollment
- Enrolled (PECOS I20040519000951); accepts Medicare assignment
- Medical or professional school
- University Of Pittsburgh School Of Medicine, 1993
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gynecologic oncology physician records → All 176 in California → Look up another NPI →
Also registered at 910 Campisi Way Ste 2A
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Juliana Arenas Velasquez, PA-CPhysician Assistant1396577391
- Helen DinhPhysician Assistant1255055422
- Elaine Lee, M.D.Surgery Physician1619243086
- Tiffany Sia, M.D.Gynecologic Oncology Physician1760915912
Verify James Lilja in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G85643Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
47% fewer Medicare Part D claims than the average gynecologic oncology physician in 2024
104 Medicare Part D claims for 54 beneficiaries, against an average of 195 among the 1,475 providers of this specialty who prescribed in Part D. 31 claims were for opioids.
Most prescribed
- Diclofenac Sodium29 claims
- Hydrocodone-Acetaminophen28 claims
- Naproxen21 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $2,602.04
36 payments; by number, the most common kind was food and beverage; the largest payer was Dilon Technologies, Inc. The 1,199 providers of this specialty with any payment received $6,387.20 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
4 hospitals and group practices
- Bay Area Gynecology Oncology IncCampbell, CA
- County OF MontereySalinas, CA
- Hazel Hawkins Memorial HospitalHollister, CA · Critical Access Hospitals
- Washington Township Medical FoundationFremont, 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).
James Lilja among 176 gynecologic oncology physician records in California
James Lilja, M.D. is one of 176 gynecologic oncology physician records with a practice address in California. 86% 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 · 86% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated1993 · median 2004 among the 131 with a school on file
- Record last updated2026 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207VX0201X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gynecologic Oncology Physician providers in California
There are 176 gynecologic oncology physician records in California.
All 176 in California → Every provider in Campbell → Gynecologic Oncology Physician nationwide →
The 8 gynecologic oncology physician records with the nearest ZIP codes
- Tiffany Sia, M.D.Campbell, CA 950081760915912
- Samuel Ballon, M.D.Los Gatos, CA 950321760408173
- Daniel Kato, MDSanta Clara, CA 950511851478788
- John Tatman, MDSanta Clara, CA 950511184701021
- Karen Levy, M.D.San Jose, CA 951281467865386
- Giuseppe Ciaravino, MDOakland, CA 946111992883771
- Thomas Ewing, MDOakland, CA 946111376621177
- Liz Han, MDOakland, CA 946111699721498
Common questions
What is James Lilja, M.D.'s NPI number?
James Lilja, M.D.'s National Provider Identifier (NPI) is 1225081441, issued on May 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is James Lilja, M.D. located?
The NPPES record lists a practice address at 910 Campisi Way Ste 2A, Campbell, CA, 95008. Phone: (408) 827-4274. Providers update this record themselves, so call before visiting.
How can I verify James Lilja, M.D.'s license?
NPPES lists California license number G85643, 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.
How much does James Lilja, M.D. prescribe under Medicare Part D?
In 2024, James Lilja, M.D. had 104 Medicare Part D claims for 54 beneficiaries; the average among gynecologic oncology physician prescribers was 195. Part D covers Medicare prescriptions only.
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.