Dr. Alex Hieu Ly, MD
- Medicare services, 2024
- 234
- Medicare patients, 2024
- 220
- Part D claims, 2016
- 11
- Hospital affiliations
- 4
- Industry payments
- $2,063
- Practice address
- 101 E. Valencia Mesa Drive, Fullerton, CA 92835
- Practice phone
- Call (714) 578-8706
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
St. Jude Medical Center - Unit
Acute Care Hospital-Unit · Fullerton, California
Find Dr. 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.
Dr. Alex Hieu Ly is an internist in Fullerton, California
Dr. Ly practices at St. Jude Medical Center - Unit in Fullerton, California.
Dr. Ly's NPI, 1134380173, was assigned on June 23, 2008. Dr. Ly graduated from St. George's University School of Medicine in 2008. Dr. Ly's California license number on file is A120555.
- NPI
- 1134380173NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8527228790
- NPI enumeration date
- June 23, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (714) 578-8706
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 44
- Medical school graduation
- 2008
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Alex Hieu Ly practices at St. Jude Medical Center - Unit in Fullerton, California
Dr. Ly's primary practice is St. Jude Medical Center - Unit, at 101 E. Valencia Mesa Drive, Fullerton, CA 92835 in Orange County. The practice phone is (714) 578-8706.
- St. Jude Medical Center - Unit101 E. Valencia Mesa Drive, Fullerton, CA 92835 · Orange CountyPhone(714) 578-8706
Source: Dmand AI Affiliation Data
Dr. Alex Hieu Ly is affiliated with 6 sites of care and 5 medical groups
Dr. Ly's primary practice is St. Jude Medical Center - Unit in Fullerton, California. Dr. Ly is also affiliated with Providence St. Jude Medical Center. The medical group on file is St. Jude Heritage Medical Group. Dmand AI also links Dr. Ly to 2 more hospitals, 4 medical groups, 1 group practice or clinic and 1 other site, each named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Alex Hieu Ly's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ly practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| St. Jude Medical Center - Unit | Available with a free account |
| +5 more sites and 4 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Alex Hieu Ly is one of 16,751 internists in California
Internal medicine is Dr. Ly's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Ly is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Ly's licenses on file in 6 states: California, Maine, Oregon, New York, Colorado and New Jersey.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
- Maine license
- Oregon license
- New York license
- Colorado license
- New Jersey license
Clinical focus
Dmand AI lists cardiac arrhythmia among the conditions Dr. Ly treats.
Internists near Dr. Ly
Counts of internists 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. Alex Hieu Ly billed Medicare for 234 services in 2024
CMS data shows 234 Medicare services from Dr. Ly across 3 procedure codes in 2024, for 220 Medicare patients. Medicare paid $24,628 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Ly's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2142024: 2349%
Dr. Ly compared with the California median for internists, 2024
- Dr. Ly
- California median
- Medicare services
- 234vs 36135% below
- Medicare patients
- 220vs 15146% above
- Part D claims
- 11vs 42197% below
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Ly'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.
Need commercial claims for Dr. Ly?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Ly and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Alex Hieu Ly treated 220 Medicare patients in 2024, average age 78
CMS counts 220 Medicare patients who saw Dr. Ly in 2024. The largest group is 85 and over, with 75 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 40% are also on Medicaid. Their average risk score is 3.05, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Ly's median patient age at 70, with 48% women.
Dr. Ly's Medicare patients by age, 2024
Dr. Ly's Medicare patients by sex, 2024
- Women12356%
- Men9744%
Chronic conditions among Dr. Ly's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis57%
- Chronic kidney disease54%
- Heart failure50%
- Diabetes47%
- Ischemic heart disease44%
- Anxiety40%
Share of Medicare patients with each condition. A patient can have several.
Dr. 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 70
Patient panel by sex, all payers
- Women48%
- Men50%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Alex Hieu Ly wrote 11 Medicare Part D claims in 2016
In 2016, Dr. Ly wrote 11 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $95 in total drug cost.
Dr. Ly's most prescribed drugs by claims, 2016
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
How Dr. Alex Hieu Ly takes part in Medicare
Dr. 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)
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Dr. Alex Hieu Ly received $2,063 in industry payments from 2016 to 2025
CMS Open Payments shows 17 general payments to Dr. Ly from 11 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 81% of the total. Alcon Laboratories Inc paid the most, $695.
General payments to Dr. Ly by program year, 2016 to 2025
General payments to Dr. Ly by kind, 2016 to 2025
- Food and beverage$1,66781%
- Travel and lodging$39619%
Companies that paid Dr. Ly 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. Alex Hieu Ly graduated from St. George's University School of Medicine
Dr. Ly graduated from St. George's University School of Medicine in 2008.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Alex Hieu Ly accepts plans from 14 insurance carriers
Dr. Ly is in network with 14 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Elevance
- HCSC
- Blue Cross Blue Shield of Massachusetts
- Regence Health Plans
- Alliant Health Plans
- +6 more carriersWith a free account
Plan types Dr. Ly accepts, by number of carriers
- PPO9
- Medicare7
- HMO6
- EPO4
- POS4
Source: Dmand AI Insurance Network Data
Sources for Dr. Alex Hieu 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 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) |
| 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) |
| 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. Alex Hieu 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 Dr. Alex Hieu Ly's NPI number?
Dr. Alex Hieu Ly's NPI number is 1134380173. It was assigned on June 23, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Alex Hieu Ly?
Dr. Alex Hieu Ly is an internist in Fullerton, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Alex Hieu Ly practice?
Dr. Ly practices at 101 E. Valencia Mesa Drive, Fullerton, CA 92835. Dr. Ly's primary practice is St. Jude Medical Center - Unit in Fullerton, California. Dmand AI also links Dr. Ly to 2 hospitals, 4 medical groups, 1 group practice or clinic and 1 other site.
What is Dr. Alex Hieu Ly's office phone number?
The practice phone on file for Dr. Ly is (714) 578-8706.
What is Dr. Alex Hieu Ly's medical license number?
Dr. Ly's California license number on file is A120555, one of the licenses on file in 6 states.
Which states has Dr. Alex Hieu Ly been licensed in?
Dmand AI has state licenses on file for Dr. Ly in California (2012 to 2025), Maine (since 2015), Oregon (2025), New York (2012 to 2014), Colorado (2011 to 2013) and New Jersey (2011 to 2013).
Which hospitals is Dr. Alex Hieu Ly affiliated with?
Dr. Ly is affiliated with Providence St. Jude Medical Center. Dmand AI links Dr. Ly to 3 more hospitals.
What medical group is Dr. Alex Hieu Ly part of?
Dr. Ly is linked to St. Jude Heritage Medical Group. Dmand AI links Dr. Ly to 4 more medical groups.
Does Dr. Alex Hieu Ly accept Medicare?
Yes. CMS data shows Dr. Ly billed Medicare for 234 services in 2024, and Dr. Ly accepts Medicare assignment.
How many Medicare patients does Dr. Alex Hieu Ly see?
CMS counts 220 Medicare patients who saw Dr. Ly in 2024, with an average age of 78.
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Is Dr. Alex Hieu Ly board certified?
Yes. Dr. Ly is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Alex Hieu Ly bill to Medicare?
In 2024, Dr. Ly's most billed Medicare services were hospital inpatient care (99222), hospital inpatient care (99223) and care management and other visits (99497).
Where did Dr. Alex Hieu Ly go to medical school?
Dr. Ly graduated from St. George's University School of Medicine in 2008.
What drugs does Dr. Alex Hieu Ly prescribe most?
In 2016 Medicare Part D data, Dr. Ly's most prescribed drugs by claims were Enalapril Maleate.
Has Dr. Alex Hieu Ly received payments from drug or device companies?
CMS Open Payments shows $2,063 in general payments to Dr. Ly from 11 companies from 2016 to 2025. The largest total came from Alcon Laboratories Inc.
How long has Dr. Alex Hieu Ly been practicing?
Dr. Ly graduated from medical school in 2008, 18 years ago.
What insurance does Dr. Alex Hieu Ly accept?
Dr. Ly is in network with 14 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
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