Larry J. Lo, MD
Obstetrics & Gynecology Physician · Tracy, CA
Larry J. Lo, MD is an obstetrics & gynecology physician with a practice address in Tracy, California, and NPI 1205850864, issued on Jul 27, 2006. Check the license (California G54156, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Larry J. Lo
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- G54156 CA
Self-reported in NPPES; status is on the state search - Practice location
- 445 W Eaton Ave, Tracy, CA 95376
- Phone
- (209) 335-0100
- Enumerated
- Jul 27, 2006
- Record last updated
- Feb 5, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (209) 835-7257
- Medicaid ID
- 00G541560 CA
- Medicare enrollment
- Enrolled (PECOS I20040618000676); accepts Medicare assignment
- Medical or professional school
- University Of Wisconsin School Of Medicine, 1981
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 445 W Eaton Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Larry J. Lo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G54156Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
33% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
111 Medicare Part D claims for 40 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D.
Most prescribed
- Estradiol34 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.
Bills Medicare through one group practice
- Sutter Valley Medical FoundationSacramento, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Larry J. Lo among 5,088 obstetrics & gynecology physician records in California
Larry J. Lo, MD is one of 5,088 obstetrics & gynecology physician records with a practice address in California. 74% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 52% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated1981 · median 2004 among the 2,700 with a school on file
- Record last updated2019 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in California
There are 5,088 obstetrics & gynecology physician records in California.
All 5,088 in California → Every provider in Tracy → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Shubhangi Kesavan, M.D.Tracy, CA 953761164799656
- Poonamalee Malika, MDTracy, CA 953761295780179
- Roopa Meda, MDTracy, CA 953761568660256
- Stephen Tsang, MDTracy, CA 953761568494763
- William Probst, MDTracy, CA 953771407934391
- Konrad Thomas, MDTracy, CA 953771801870035
- Brian Bigelow, MDTurlock, CA 953821033297940
- Chrystal Bradley, M.D.Sonora, CA 953701366886392
Common questions
What is Larry J. Lo, MD's NPI number?
Larry J. Lo, MD's National Provider Identifier (NPI) is 1205850864, issued on Jul 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Larry J. Lo, MD located?
The NPPES record lists a practice address at 445 W Eaton Ave, Tracy, CA, 95376. Phone: (209) 335-0100. Providers update this record themselves, so call before visiting.
How can I verify Larry J. Lo, MD's license?
NPPES lists California license number G54156, 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 Larry J. Lo, MD prescribe under Medicare Part D?
In 2024, Larry J. Lo, MD had 111 Medicare Part D claims for 40 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. 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.