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Dr. Lilly Frawley Hammack , DO, RDN

Internal Medicine β€’ Gilroy, CA

Active NPI 1972932523 Individual Practitioner Female Practitioner Accepts Medicare assignment Telehealth (some services)
Practice location in NPPES

7520 Arroyo Cir
Gilroy, CA 950207303

Call 4088484600 Location details and other listings
Medical Disclaimer

This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.

Practice Location & Contact Primary Location

Practice Address

7520 Arroyo Cir

Gilroy, CA 950207303

Telephone 4088484600
Organization at the Same NPPES Address or Phone
Kaiser Foundation Health Plan Inc Facility NPI 1235286550

Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.

Other Listings in Public Data

CMS Doctors and Clinicians lists 1 group name: Permanente Medical Group Inc. See the list

Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026.

Listings do not confirm current availability, employment or a shared ownership network.

Medicare Profile & Education

Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026

Medical School

University Of North Texas Hsc, College Of Osteopathic Med

Graduation Year

2021

30-day fills

88 standardized 30-day fills in 2024

CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.

What this does not show: 30-day fills

It is not a count of patients and not a measure of quality.

Part D drug cost

$2,037 in 2024

The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.

What this does not show: Part D drug cost

A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.

Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024.

Industry payments (Open Payments)

No Open Payments records are listed for this clinician for 2019–2025.

Guide: How to read an Open Payments record

Years since graduation

5 years (graduated 2021)

CMS Doctors and Clinicians data list 2021 as the year this clinician finished professional school.

What this does not show: Years since graduation

It is not the number of years in practice, and more years does not mean better care.

Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026.

NPI first issued

2013

The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.

What this does not show: NPI first issued

NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.

Source: CMS NPPES NPI Registry.

Accepts Medicare assignment

CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.

Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.

Source: CMS Doctors and Clinicians, CMS release of October 2, 2026; Medicare.gov, β€œDoes your provider accept Medicare as full payment?”

Guide: What Medicare assignment means

Telehealth (some services)

Recent Medicare claims show this clinician provided some services by telehealth, such as a video or phone visit.

What this does not show: Telehealth (some services)

It does not mean all services are offered by telehealth, or that telehealth is covered by your plan.

Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians, CMS release of October 2, 2026.

Guide: How Medicare covers telehealth

Enrolled in Medicare (PECOS)

Dr. Hammack has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.

It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.

Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.

Guide: What Medicare enrollment (PECOS) means

Can order Medicare-covered services

CMS lists Dr. Hammack as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.

What this does not show: Can order Medicare-covered services

It does not mean the clinician offers these services directly.

Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.

Guide: What ordering and referring status means

Compared with the same specialty in Gilroy and California

Billing and prescribing volume is not a quality rating.

Medicare Part D prescriptions

Fewer Part D prescriptions than 85% of clinicians listed under Internal Medicine in California (2024, 10,856 clinicians with data). Median for this group: 1,234. Middle half: 145 to 4,216.

Too few clinicians listed under Internal Medicine in Gilroy have Medicare Part D data for 2024 to compare.

Part D drug cost

A lower Part D drug cost than 80% of clinicians listed under Internal Medicine in California (2024, 10,856 clinicians with data). Median for this group: $86,595. Middle half: $7,293 to $305,458.

Too few clinicians listed under Internal Medicine in Gilroy have Medicare Part D data for 2024 to compare.

16 active clinicians are listed under Internal Medicine with a practice address in Gilroy, CA (17,897 in California).

Addresses are self-reported to NPPES and may be out of date.

Telehealth indicator in Gilroy

31.2% of these 16 clinicians have the CMS telehealth indicator.

75% of these 16 clinicians are listed by CMS as accepting Medicare assignment.

Sources: CMS Medicare Part D Prescribers (2024), CMS Doctors and Clinicians, CMS release of October 2, 2026, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.

Text: T-MedInfo Β· Report an error.

Medicare Part D Prescribing Profile & Medications

Medicare Part D prescriptions filled, including refills, in 2024.

CMS Part D Β· Data Year 2024
Prescription Year:
Brand Name Generic Name Prescriptions Day Supply Total Cost Patients
Alvesco Ciclesonide 18 540 $1,325.88 β€”
Atorvastatin Calcium Atorvastatin Calcium 13 1,290 $147.71 β€”
Fluticasone Propionate Fluticasone Propionate 12 360 $221.37 β€”
Levothyroxine Sodium Levothyroxine Sodium 11 460 $341.73 β€”

Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits

Specialties & License Numbers Reported to NPPES

Self-certified to NPPES: 2025-08-04
Internal Medicine Primary Specialty

NUCC Taxonomy Code: 207R00000X

License # reported to NPPES CA 21928

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

Dietitian, Registered

NUCC Taxonomy Code: 133V00000X

License # reported to NPPES TX DT81915

A Registered Dietitian (RD)/Registered Dietitian Nutritionist (RDN) is an individual uniquely trained in the science of nutrition and practice of dietetics to design and provide medical nutrition therapy (MNT) and other evidence-based applications of the Nutrition Care Process (NCP) that exemplify the profession's systematic approach to providing high quality nutrition care. Registered dietitians provide MNT for the purpose of disease prevention or management, or to treat or rehabilitate an illness, injury, or condition, with the use of specific, indicated physical and cognitive nutrition care services comprised of one or more of the following aspects of the NCP: nutrition assessment/reassessment, nutrition diagnosis, nutrition intervention (e.g., nutrition counseling, therapeutic diet ordering, and nutrition education) and nutrition monitoring and evaluation.

Check License Status with the State Board License numbers are self-reported to NPPES; T-MedInfo does not confirm them against state records. Current status: Medical Board of California.
Look Up on State Board Site

Medicare (PECOS) Enrollment & Ordering Eligibility

Source: CMS PECOS
Medicare FFS Enrollment Status Medicare Enrollment on File
CMS Provider Specialty

PRACTITIONER - INTERNAL MEDICINE

Medicare Enrollment ID

I20240101000152

Enrollment State Jurisdiction

CA

PECOS Control ID

6103054200

Medicare Order & Referring Eligibility
Clinical Lab & Imaging (Part B) Eligible
Durable Medical Equipment (DME) Eligible
Home Health Agency (HHA) Eligible
Power Mobility Devices (PMD) Eligible

Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.

Medicare Group Practice Enrollments

Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026

Permanente Medical Group Inc

710 Lawrence Express Way, Santa Clara, CA 950515173

Phone: 4088511000

Clinicians Sharing This Practice Address or Phone

Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.

17 listed
NPI 1194801613

Doctor of Medicine (M.D.)

Dr. Robert Biggs , MD

Internal Medicine

NPI 1770669277

Doctor of Medicine (M.D.)

Dr. Tynka Dees , MD

Family Medicine

NPI 1467538975

Doctor of Medicine (M.D.)

Dr. Pamela Edillon , MD

Obstetrics & Gynecology

NPI 1184702680

Doctor of Medicine (M.D.)

Dr. Michael H Dez , MD

Obstetrics & Gynecology

NPI 1942386446

Doctor of Medicine (M.D.)

Dr. Sunita Lalwani , MD

Internal Medicine

NPI 1588740096

Doctor of Medicine (M.D.)

Career & Practice History Timeline

Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status

12 Historical Events
πŸ“
Updated Practice Location August 04, 2025

Registered at 7520 ARROYO CIR, GILROY, CA 950207303 (Tel: 4088484600)

πŸ“
Updated Business Mailing Address October 12, 2023

Registered at 18045 HILLWOOD LN, MORGAN HILL, CA 950373526 (Tel: 6238663574)

πŸ‘€
Provider Name / Credentials Updated October 12, 2023

Recorded as LILLY HAMMACK, DO, RDN

πŸ“
Updated Practice Location March 29, 2021

Registered at 700 LAWRENCE EXPY, SANTA CLARA, CA 950515173 (Tel: 4088511000)

πŸ“
Updated Business Mailing Address March 29, 2021

Registered at 7625 MAHONIA DR, FORT WORTH, TX 761337927 (Tel: 6238663574)

πŸ‘€
Provider Name / Credentials Updated March 29, 2021

Recorded as LILLY HAMMACK, RDN

βœ…
NPI Profile Active November 04, 2013

NPI status registered as active in NPPES database

πŸ“
Practice Location (Initial Record) November 04, 2013

Registered at 320 SOUTH FWY, FORT WORTH, TX 761043525 (Tel: 8172586408)

πŸ“
Business Mailing Address (Initial Record) November 04, 2013

Registered at 4200 BRIDGEVIEW DR, APT 936, FORT WORTH, TX 761095560 (Tel: 6238663574)

πŸ‘€
Provider Name / Credentials (Initial Record) November 04, 2013

Recorded as LILLY FRAWLEY, RD

πŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) November 04, 2013

Dietitian, Registered (license number reported to NPPES: TX DT81915)

🟒
Initial NPI Registration & Enumeration November 04, 2013

First registered as active Individual Practitioner in NPPES Database.

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NPI Administrative Meta

NPI Number: 1972932523
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: November 04, 2013
Last Update: August 04, 2025
Sole Proprietor: No

Other Internal Medicine Providers in Gilroy

All Internal Medicine Providers in Gilroy

Mailing Address

18045 Hillwood Ln

Morgan Hill, CA 950373526

Phone: 6238663574

About This Data NPPES fields (address, phone, specialty, license) are self-reported and may be outdated; Medicare fields follow the CMS dataset named in each section. Correct directly at NPPES.