Liliana Kossoy Hamlett, MD
Obstetrics & Gynecology Physician · San Jose, CA
Liliana Kossoy Hamlett, MD is an obstetrics & gynecology physician with a practice address in San Jose, California, and NPI 1053452292, issued on Feb 9, 2007. Check the license (California A50126, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Liliana Kossoy Hamlett
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- A50126 CA
Self-reported in NPPES; status is on the state search - Practice location
- 751 S Bascom Ave, San Jose, CA 95128
- Phone
- (408) 885-5550
- Enumerated
- Feb 9, 2007
- Record last updated
- Sep 12, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicaid ID
- 00A501260 CA
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 751 S Bascom Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Liliana Kossoy Hamlett in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A50126Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
65% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
57 Medicare Part D claims for 16 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 30% of claims.
Most prescribed
- Premarin12 claims
- Losartan Potassium11 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 80.6 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Liliana Kossoy Hamlett among 5,088 obstetrics & gynecology physician records in California
Liliana Kossoy Hamlett, 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 2007, is newer than 48% of them.
- NPI issued2007 · 48% of these records are older, 38% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileNo · 53% of these records are
- Record last updated2007 · 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 San Jose → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Ingrid Aalami, MDSan Jose, CA 951281952376550
- Katherine Blenko, MDSan Jose, CA 951281063485167
- Iris Colon, MDSan Jose, CA 951281598734998
- Jenny Dai Biller, M.D.San Jose, CA 951281811970973
- Jennifer Domingo-Mihalko, MDSan Jose, CA 951281871556431
- Neena Duggal, MDSan Jose, CA 951281659333730
- Matthew Garabedian, M.D.San Jose, CA 951281508833120
- Carolyn Kerr, MDSan Jose, CA 951281871557884
Common questions
What is Liliana Kossoy Hamlett, MD's NPI number?
Liliana Kossoy Hamlett, MD's National Provider Identifier (NPI) is 1053452292, issued on Feb 9, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Liliana Kossoy Hamlett, MD located?
The NPPES record lists a practice address at 751 S Bascom Ave, San Jose, CA, 95128. Phone: (408) 885-5550. Providers update this record themselves, so call before visiting.
How can I verify Liliana Kossoy Hamlett, MD's license?
NPPES lists California license number A50126, 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 Liliana Kossoy Hamlett, MD prescribe under Medicare Part D?
In 2024, Liliana Kossoy Hamlett, MD had 57 Medicare Part D claims for 16 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.
What is Liliana Kossoy Hamlett, MD's MIPS final score?
The 2023 MIPS final score is 80.6 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.