Dr. Amy Lightner Day, MD
- Medicare services, 2024
- 367
- Medicare patients, 2024
- 189
- Part D claims, 2024
- 76
- Hospital affiliations
- 1
- Industry payments
- $19,013
- Practice address
- 10666 North Torrey Pines Road, La Jolla, CA 92037
- Practice phone
- Call (858) 554-3600
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Day's professional email, personal email and mobile number
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Dr. Amy Lightner Day is a general surgeon in La Jolla, California
Dr. Day practices at Scripps Green Hospital in La Jolla, California, part of Scripps Health.
Dr. Day's NPI, 1164466173, was assigned on June 16, 2006. Dr. Day graduated from David Geffen School of Medicine at UCLA in 1997. Dr. Day holds California license A71460.
- NPI
- 1164466173NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4587608385
- NPI enumeration date
- June 16, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (858) 554-3600
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 55
- Medical school graduation
- 1997
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Amy Lightner Day practices at Scripps Green Hospital in La Jolla, California
Dr. Day's primary practice is Scripps Green Hospital, at 10666 North Torrey Pines Road, La Jolla, CA 92037 in San Diego County. The practice phone is (858) 554-3600.
- Scripps Green Hospital10666 North Torrey Pines Road, La Jolla, CA 92037 · San Diego CountyPhone(858) 554-3600
Source: Dmand AI Affiliation Data
Dr. Amy Lightner Day is affiliated with 4 sites of care and 1 medical group
Dr. Day's primary practice is Scripps Green Hospital in La Jolla, California, part of Scripps Health. The medical group on file is Scripps Clinic Medical Group. Dmand AI also links Dr. Day to 1 more breast imaging center, 1 physician office and 1 urgent care center, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Amy Lightner Day's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Day practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Scripps Green Hospital | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Amy Lightner Day is one of 2,926 general surgeons in California
Surgery is Dr. Day's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Day is board certified in surgery by the American Board of Surgery. Dr. Day is licensed in California.
Specialties and state licenses
- Surgery, CaliforniaPrimary
Clinical focus
Dmand AI lists abdominal hernia repair surgery, colon removal, gallbladder removal, groin hernia surgery and hemorrhoids among the conditions Dr. Day treats.
General surgeons near Dr. Day
Counts of general surgeons with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Amy Lightner Day billed Medicare for 367 services in 2024
CMS data shows 367 Medicare services from Dr. Day across 11 procedure codes in 2024, for 189 Medicare patients. Medicare paid $40,086 for them.
Dr. Day's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2032024: 23717%
- Surgery
- 2023: 572024: 6718%
- Tests and treatments
- 2023: 302024: 63110%
Where Dr. Day's Medicare services took place, 2024
- In an office32589%
- In a facility4211%
Dr. Day compared with the California median for general surgeons, 2024
- Dr. Day
- California median
- Medicare services
- 367vs 1662.2 times
- Medicare patients
- 189vs 12156% above
- Part D claims
- 46vs 3435% above
Medians across 2,606 general surgeons in California with Dmand AI profiles that report each measure.
Dr. Day's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Day and other general surgeons in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Amy Lightner Day treated 189 Medicare patients in 2024, average age 74
CMS counts 189 Medicare patients who saw Dr. Day in 2024. The largest group is 65 to 74, with 94 patients. 75% of them have high cholesterol, and 66% have high blood pressure. Their average risk score is 1.17, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Day's median patient age at 64, with 56% women.
Dr. Day's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Day's Medicare patients by sex, 2024
- Women10153%
- Men8847%
Chronic conditions among Dr. Day's Medicare patients, 2024
- High cholesterol75%
- High blood pressure66%
- Arthritis50%
- Anxiety25%
- Mood disorders24%
- Depression23%
- Ischemic heart disease23%
- Osteoporosis20%
Share of Medicare patients with each condition. A patient can have several.
Dr. Day's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 64
Patient panel by sex, all payers
- Women56%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Amy Lightner Day wrote 76 Medicare Part D claims in 2024
In 2024, Dr. Day wrote 76 Medicare Part D claims for 49 patients. 97% of them were for generic drugs. CMS names the drug for 46 of them, across 2 drugs with 11 or more claims each, at $597 in total drug cost. In 2023, CMS named 43 claims across 2 drugs.
Dr. Day's Part D claims by kind of drug, 2024
- Generic74 claims97%
- Brand-name and other2 claims3%
Dr. Day's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Day's Part D claims, 2024
- Opioids33%25 of 76 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 432024: 467%
Drugs named by CMS: 2 in 2024, 2 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Amy Lightner Day ranks in the 97th percentile for hernia repair (minimally invasive) in Medicare
Dr. Day accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 39 procedures of hernia repair (minimally invasive) by Dr. Day, more than 97% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Day ranks in Medicare procedure volume
- Hernia repair (minimally invasive)
- 97th percentile39 procedures
- Hernia repair - groin (open)
- 92nd percentile13 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Melanoma (skin cancer) excision: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Amy Lightner Day received $19,013 in industry payments from 2016 to 2025
CMS Open Payments shows 62 general payments to Dr. Day from 22 drug and device companies from 2016 to 2025. Education make up the largest share, 90% of the total. Intuitive Surgical, Inc. paid the most, $17,572.
General payments to Dr. Day by program year, 2016 to 2025
General payments to Dr. Day by kind, 2016 to 2025
- Education$17,07890%
- Food and beverage$1,93510%
Companies that paid Dr. Day the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Amy Lightner Day has 2 awards and honors on record
Dmand AI lists 2 awards for Dr. Day.
Awards and honors for Dr. Day
- Undated
- ACS Fellow
- Checkbook Top Doc
Source: Dmand AI Professional Profile Data
Dr. Amy Lightner Day graduated from David Geffen School of Medicine at UCLA
Dr. Day graduated from David Geffen School of Medicine at UCLA in 1997. Dr. Day is a member of ACS.
- Medical school
- Board certified in surgery
Source: Dmand AI Professional Profile Data
Dr. Amy Lightner Day accepts plans from 8 insurance carriers
Dr. Day is in network with 8 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- Blue Cross and Blue Shield of Kansas City
- CMS Medicare
Plan types Dr. Day accepts, by number of carriers
- Medicare7
- PPO6
- HMO3
- POS3
- EPO2
Source: Dmand AI Insurance Network Data
Sources for Dr. Amy Lightner Day's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Amy Lightner Day
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Amy Lightner Day's NPI number?
Dr. Amy Lightner Day's NPI number is 1164466173. It was assigned on June 16, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Amy Lightner Day?
Dr. Amy Lightner Day is a general surgeon in La Jolla, California. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Amy Lightner Day practice?
Dr. Day practices at 10666 North Torrey Pines Road, La Jolla, CA 92037. Dr. Day's primary practice is Scripps Green Hospital in La Jolla, California, part of Scripps Health. Dmand AI also links Dr. Day to 1 breast imaging center, 1 physician office and 1 urgent care center.
What is Dr. Amy Lightner Day's office phone number?
The practice phone on file for Dr. Day is (858) 554-3600.
What is Dr. Amy Lightner Day's medical license number?
Dr. Day holds California license A71460.
Which hospitals is Dr. Amy Lightner Day affiliated with?
Dr. Day practices at Scripps Green Hospital in La Jolla, California.
What medical group is Dr. Amy Lightner Day part of?
Dr. Day is linked to Scripps Clinic Medical Group.
Does Dr. Amy Lightner Day accept Medicare?
Yes. CMS data shows Dr. Day billed Medicare for 367 services in 2024, and Dr. Day accepts Medicare assignment.
How many Medicare patients does Dr. Amy Lightner Day see?
CMS counts 189 Medicare patients who saw Dr. Day in 2024, with an average age of 74.
Is Dr. Amy Lightner Day board certified?
Yes. Dr. Day is board certified in surgery by the American Board of Surgery.
Show 6 more questionsShow fewer questions
What services does Dr. Amy Lightner Day bill to Medicare?
In 2024, Dr. Day's most billed Medicare services were heart test or procedure (93005), office visit, new patient (99203) and office visit, established patient (99215).
Where did Dr. Amy Lightner Day go to medical school?
Dr. Day graduated from David Geffen School of Medicine at UCLA in 1997.
What drugs does Dr. Amy Lightner Day prescribe most?
In 2024 Medicare Part D data, Dr. Day's most prescribed drugs by claims were Hydrocortisone and Hydrocodone-Acetaminophen.
Has Dr. Amy Lightner Day received payments from drug or device companies?
CMS Open Payments shows $19,013 in general payments to Dr. Day from 22 companies from 2016 to 2025. The largest total came from Intuitive Surgical, Inc.
How long has Dr. Amy Lightner Day been practicing?
Dr. Day graduated from medical school in 1997, 29 years ago.
What insurance does Dr. Amy Lightner Day accept?
Dr. Day is in network with 8 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
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