Ellen Ly, NP
- Part D claims, 2026
- 29
- Hospital affiliations
- 1
- Industry payments
- $1,921
- Medical group
- 1
- State license
- 1
- Practice address
- 625 S Fair Oaks Ave, Pasadena, CA 91105
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Huntington Ambulatory Surgery Center - HOPD
Acute Care Hospital outpatient department · Pasadena, California
Find Ellen Ly's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Ellen Ly is a nurse practitioner in Pasadena, California
Ellen Ly practices at Huntington Ambulatory Surgery Center - HOPD in Pasadena, California.
Ellen Ly's NPI, 1215539820, was assigned on November 10, 2020. Ellen Ly holds California license 2020115166.
- NPI
- 1215539820NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3274071485
- NPI enumeration date
- November 10, 2020
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 32
- Medical school graduation
- 2020
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Ellen Ly practices at Huntington Ambulatory Surgery Center - HOPD in Pasadena, California
Ellen Ly's primary practice is Huntington Ambulatory Surgery Center - HOPD, at 625 S Fair Oaks Ave, Pasadena, CA 91105.
- Huntington Ambulatory Surgery Center - HOPD625 S Fair Oaks Ave, Pasadena, CA 91105
Source: Dmand AI Affiliation Data
Ellen Ly is affiliated with 3 sites of care and 1 medical group
Ellen Ly's primary practice is Huntington Ambulatory Surgery Center - HOPD in Pasadena, California. Ellen Ly is also affiliated with USC Arcadia Hospital. The medical group on file is Foothill Cardiology Medical Group. Dmand AI also links Ellen Ly to 1 more group practice or clinic, named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Ellen Ly's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Ellen Ly practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Huntington Ambulatory Surgery Center - HOPD | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Ellen Ly is one of 5,983 nurse practitioners in California
Nurse practitioner is Ellen Ly's primary specialty in the NPI Registry, under taxonomy code 363L00000X. Ellen Ly is licensed in California.
Specialties and state licenses
- Nurse practitioner, CaliforniaPrimary
Nurse practitioners near Ellen Ly
Counts of nurse practitioners 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
Ellen Ly's patients have a median age of 78
Across all payers, Dmand AI patient panel data puts Ellen Ly's median patient age at 78, with 49% women.
Ellen Ly's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 78
Patient panel by sex, all payers
- Women49%
- Men51%
Source: Dmand AI Patient Panel Data
Ellen Ly wrote 29 Medicare Part D claims in 2026
In 2026, Ellen Ly wrote 29 Medicare Part D claims. 76% of them were for generic drugs.
Ellen Ly's Part D claims by kind of drug, 2026
- Generic22 claims76%
- Brand-name and other7 claims24%
Source: Medicare Part D Prescribers - by Provider (CMS), 2026 data
How Ellen Ly takes part in Medicare
Ellen Ly accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
For MedTech and pharma teams
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Ellen Ly received $1,921 in industry payments from 2024 to 2025
CMS Open Payments shows 86 general payments to Ellen Ly from 15 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 100% of the total. Novartis Pharmaceuticals Corporation paid the most, $478.
General payments to Ellen Ly by program year, 2024 to 2025
Companies that paid Ellen Ly the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Ellen Ly'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 Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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 Ellen Ly
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Ellen Ly's NPI number?
Ellen Ly's NPI number is 1215539820. It was assigned on November 10, 2020, and it is active in the NPI Registry.
What does Ellen Ly specialize in?
Ellen Ly is a nurse practitioner in Pasadena, California. The primary specialty in the NPI Registry is Nurse Practitioner (taxonomy code 363L00000X).
Where does Ellen Ly practice?
Ellen Ly practices at 625 S Fair Oaks Ave, Pasadena, CA 91105. Ellen Ly's primary practice is Huntington Ambulatory Surgery Center - HOPD in Pasadena, California. Dmand AI also links Ellen Ly to 1 group practice or clinic, and a free account names each one.
What is Ellen Ly's email address?
Dmand AI checks professional and personal email addresses for Ellen Ly through healthcare-specific waterfall enrichment. They are available with a free Dmand AI account.
What is Ellen Ly's medical license number?
Ellen Ly holds California license 2020115166.
Which hospitals is Ellen Ly affiliated with?
Ellen Ly is affiliated with USC Arcadia Hospital.
What medical group is Ellen Ly part of?
Ellen Ly is linked to Foothill Cardiology Medical Group.
Who does Ellen Ly practice with?
Dmand AI links 44 HCPs to Ellen Ly's primary medical group, 4 of them nurse practitioners. A free account lists them, with verified contacts.
Does Ellen Ly accept Medicare?
Yes. CMS lists Ellen Ly as accepting Medicare assignment.
Has Ellen Ly received payments from drug or device companies?
CMS Open Payments shows $1,921 in general payments to Ellen Ly from 15 companies from 2024 to 2025. The largest total came from Novartis Pharmaceuticals Corporation.
How long has Ellen Ly been practicing?
Ellen Ly graduated from medical school in 2020, 6 years ago.
What EHR does Ellen Ly's practice use?
Dmand AI tracks the EHR system at Huntington Ambulatory Surgery Center - HOPD and at 2 more affiliated sites. The vendor and product are available with a free Dmand AI account.
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