Lilly Frawley Hammack, DO, RDN
Internal Medicine Physician · Gilroy, CA
Lilly Frawley Hammack, DO, RDN is an internal medicine physician with a practice address in Gilroy, California, and NPI 1972932523, issued on Nov 4, 2013. Check the license (California 21928, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Lilly Frawley Hammack
- Credential
- DO, RDN
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 21928 CA
DT81915 TX
Self-reported in NPPES; status is on the state search - Practice location
- 7520 Arroyo Cir, Gilroy, CA 95020
- Phone
- (408) 848-4600
- Enumerated
- Nov 4, 2013
- Record last updated
- Aug 4, 2025
- Medicare enrollment
- Enrolled (PECOS I20240101000152); accepts Medicare assignment
- Medical or professional school
- University Of North Texas Hsc, College Of Osteopathic Med, 2021
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 7520 Arroyo Cir
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Robert Biggs, MDInternal Medicine Physician1770669277
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Verify Lilly Frawley Hammack in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 21928Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average internal medicine physician in 2024
187 Medicare Part D claims for 58 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Alvesco18 claims
- Atorvastatin Calcium13 claims
- Fluticasone Propionate12 claims
- Levothyroxine Sodium11 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
- Permanente Medical Group IncSanta Clara, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Lilly Frawley Hammack among 17,696 internal medicine physician records in California
Lilly Frawley Hammack, DO, RDN is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 71% of them.
- NPI issued2013 · 71% of these records are older, 26% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2021 · median 2004 among the 11,065 with a school on file
- Record last updated2025 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
16 internal medicine physician records list a practice address in Gilroy
They are 16 of the 2,100 NPPES records with a practice address in Gilroy, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Gilroy → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Vasumitha Alamelu, MDGilroy, CA 950201194801613
- Robert Biggs, MDGilroy, CA 950201770669277
- James Frankfort, MDGilroy, CA 950201497975189
- Pardeep Gondal, MDGilroy, CA 950201174048334
- Siri Chand Khalsa, MDGilroy, CA 950201982687828
- Sunita Lalwani, MDGilroy, CA 950201588740096
- Lisa Lo, MDGilroy, CA 950201740492297
- Carol Paige, MDGilroy, CA 950201265518781
Common questions
What is Lilly Frawley Hammack, DO, RDN's NPI number?
Lilly Frawley Hammack, DO, RDN's National Provider Identifier (NPI) is 1972932523, issued on Nov 4, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Lilly Frawley Hammack, DO, RDN located?
The NPPES record lists a practice address at 7520 Arroyo Cir, Gilroy, CA, 95020. Phone: (408) 848-4600. Providers update this record themselves, so call before visiting.
How can I verify Lilly Frawley Hammack, DO, RDN's license?
NPPES lists California license number 21928, 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 Lilly Frawley Hammack, DO, RDN prescribe under Medicare Part D?
In 2024, Lilly Frawley Hammack, DO, RDN had 187 Medicare Part D claims for 58 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.