Dr. Hassan Ali Chahine, MD
- Medicare services, 2024
- 2,809
- Medicare patients, 2024
- 375
- Part D claims, 2024
- 4,068
- Publications
- 1
- Hospital affiliations
- 9
- Practice address
- 1115 S Sunset Ave, West Covina, CA 91790
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Queen of the Valley Hospital - Unit
Acute Care Hospital-Unit · West Covina, California
Find Dr. Chahine's professional email, personal email and mobile number
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Dr. Hassan Ali Chahine is an internist in West Covina, California
Dr. Chahine practices at Queen of the Valley Hospital - Unit in West Covina, California.
Dr. Chahine's NPI, 1518326933, was assigned on February 12, 2016. Dr. Chahine graduated from St. George's University School of Medicine in 2015. Dr. Chahine holds California license A151005.
- NPI
- 1518326933NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9739449521
- NPI enumeration date
- February 12, 2016
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 37
- Medical school graduation
- 2015
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Hassan Ali Chahine practices at Queen of the Valley Hospital - Unit in West Covina, California
Dr. Chahine's primary practice is Queen of the Valley Hospital - Unit, at 1115 S Sunset Ave, West Covina, CA 91790.
- Queen of the Valley Hospital - Unit1115 S Sunset Ave, West Covina, CA 91790
Source: Dmand AI Affiliation Data
Dr. Hassan Ali Chahine is affiliated with 16 sites of care and 4 medical groups
Dr. Chahine's primary practice is Queen of the Valley Hospital - Unit in West Covina, California. Dr. Chahine is also affiliated with Emanate Health Inter-Community Hospital. The medical group on file is Vituity. Dmand AI also links Dr. Chahine to 7 more hospitals, 5 skilled nursing facilities, 3 medical groups, 1 home health agency and 1 hospice, each named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Hassan Ali Chahine's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chahine practices, 16 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Queen of the Valley Hospital - Unit | Available with a free account |
| +15 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Hassan Ali Chahine is one of 16,751 internists in California
Internal medicine is Dr. Chahine's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Chahine is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Chahine's licenses on file in 2 states: California and New York.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
- New York license
Clinical focus
Dmand AI lists acute diabetes, acute respiratory failure, acute stomach ulcer, asthma, atrial fibrillation and flutter, chronic diabetes, chronic respiratory failure and collapsed lung among the conditions Dr. Chahine treats.
Internists near Dr. Chahine
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. Hassan Ali Chahine billed Medicare for 2,809 services in 2024
CMS data shows 2,809 Medicare services from Dr. Chahine across 9 procedure codes in 2024, for 375 Medicare patients. Medicare paid $218,396 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Chahine's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4,6042024: 2,80939%
- Other services
- 2023: 262024: 0100%
Dr. Chahine compared with the California median for internists, 2024
- Dr. Chahine
- California median
- Medicare services
- 2,809vs 3617.8 times
- Medicare patients
- 375vs 1512.5 times
- Part D claims
- 3,401vs 4218.1 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Chahine'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. Chahine and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Hassan Ali Chahine treated 375 Medicare patients in 2024, average age 74
CMS counts 375 Medicare patients who saw Dr. Chahine in 2024. The largest group is 65 to 74, with 137 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 81% are also on Medicaid. Their average risk score is 4.16, 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. Chahine's median patient age at 70, with 50% women.
Dr. Chahine's Medicare patients by age, 2024
Dr. Chahine's Medicare patients by sex, 2024
- Women17146%
- Men20454%
Chronic conditions among Dr. Chahine's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes72%
- Chronic kidney disease64%
- Heart failure60%
- Ischemic heart disease53%
- COPD50%
- Arthritis49%
Share of Medicare patients with each condition. A patient can have several.
Dr. Chahine'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
- Women50%
- Men49%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Hassan Ali Chahine wrote 4,068 Medicare Part D claims in 2024
In 2024, Dr. Chahine wrote 4,068 Medicare Part D claims for 215 patients. 80% of them were for generic drugs. CMS names the drug for 3,401 of them, across 95 drugs with 11 or more claims each, at $224,569 in total drug cost. In 2023, CMS named 1,784 claims across 59 drugs.
Dr. Chahine's Part D claims by kind of drug, 2024
- Generic3,256 claims80%
- Brand-name and other812 claims20%
Dr. Chahine'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. Chahine's Part D claims, 2024
- Opioids1%56 of 4,068 claims
- Antibiotics5%184 of 4,068 claims
- Antipsychotics, patients 65 and over2%83 of 4,068 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: 1,7842024: 3,40191%
Drugs named by CMS: 95 in 2024, 59 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
How Dr. Hassan Ali Chahine takes part in Medicare
Dr. Chahine 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. Hassan Ali Chahine has 1 publication on record
Dmand AI links 1 paper to Dr. Chahine in 2024. Dr. Chahine's most frequent co-author is Nadine Grace-Abraham, MD.
Dr. Chahine's most frequent co-authors
Recent publications by Dr. Chahine
See who Dr. Chahine researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Chahine works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Hassan Ali Chahine received $457 in industry payments from 2018 to 2025
CMS Open Payments shows 12 general payments to Dr. Chahine from 4 drug and device companies from 2018 to 2025. Food and beverage make up the largest share, 100% of the total. ZOLL Services LLC (A/K/A ZOLL LifeCor Corp) paid the most, $188.
General payments to Dr. Chahine by program year, 2018 to 2025
Companies that paid Dr. Chahine the most, 2018 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Hassan Ali Chahine graduated from St. George's University School of Medicine
Dr. Chahine graduated from St. George's University School of Medicine in 2015.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Hassan Ali Chahine accepts plans from 9 insurance carriers
Dr. Chahine is in network with 9 carriers, including United Healthcare, Blue Cross Blue Shield of Michigan and Excellus BlueCross BlueShield. PPO plans come from the most carriers, 6. Check the plan with the practice before a visit.
- United Healthcare
- Blue Cross Blue Shield of Michigan
- Excellus BlueCross BlueShield
- Blue Cross and Blue Shield of Kansas City
- CMS Medicare
- DentaQuest
- Elevance
- HCSC
- +1 more carriersWith a free account
Plan types Dr. Chahine accepts, by number of carriers
- PPO6
- HMO3
- EPO2
- Medicare2
- POS2
Source: Dmand AI Insurance Network Data
Sources for Dr. Hassan Ali Chahine'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)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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. Hassan Ali Chahine
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. Hassan Ali Chahine's NPI number?
Dr. Hassan Ali Chahine's NPI number is 1518326933. It was assigned on February 12, 2016, and it is active in the NPI Registry.
What kind of doctor is Dr. Hassan Ali Chahine?
Dr. Hassan Ali Chahine is an internist in West Covina, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Hassan Ali Chahine practice?
Dr. Chahine practices at 1115 S Sunset Ave, West Covina, CA 91790. Dr. Chahine's primary practice is Queen of the Valley Hospital - Unit in West Covina, California. Dmand AI also links Dr. Chahine to 7 hospitals, 5 skilled nursing facilities, 3 medical groups, 1 home health agency and 1 hospice.
What is Dr. Hassan Ali Chahine's medical license number?
Dr. Chahine holds California license A151005, one of the licenses on file in 2 states.
Which states has Dr. Hassan Ali Chahine been licensed in?
Dmand AI has state licenses on file for Dr. Chahine in California (2017 to 2027) and New York (2018 to 2020).
Which hospitals is Dr. Hassan Ali Chahine affiliated with?
Dr. Chahine is affiliated with Emanate Health Inter-Community Hospital. Dmand AI links Dr. Chahine to 8 more hospitals.
What medical group is Dr. Hassan Ali Chahine part of?
Dr. Chahine is linked to Vituity. Dmand AI links Dr. Chahine to 3 more medical groups.
Does Dr. Hassan Ali Chahine accept Medicare?
Yes. CMS data shows Dr. Chahine billed Medicare for 2,809 services in 2024, and Dr. Chahine accepts Medicare assignment.
How many Medicare patients does Dr. Hassan Ali Chahine see?
CMS counts 375 Medicare patients who saw Dr. Chahine in 2024, with an average age of 74.
Is Dr. Hassan Ali Chahine board certified?
Yes. Dr. Chahine is board certified in internal medicine by the American Board of Internal Medicine.
Show 8 more questionsShow fewer questions
What services does Dr. Hassan Ali Chahine bill to Medicare?
In 2024, Dr. Chahine's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99233) and critical care (99291).
Where did Dr. Hassan Ali Chahine go to medical school?
Dr. Chahine graduated from St. George's University School of Medicine in 2015.
What drugs does Dr. Hassan Ali Chahine prescribe most?
In 2024 Medicare Part D data, Dr. Chahine's most prescribed drugs by claims were Atorvastatin Calcium, Eliquis and Pantoprazole Sodium.
Has Dr. Hassan Ali Chahine received payments from drug or device companies?
CMS Open Payments shows $457 in general payments to Dr. Chahine from 4 companies from 2018 to 2025. The largest total came from ZOLL Services LLC (A/K/A ZOLL LifeCor Corp).
How long has Dr. Hassan Ali Chahine been practicing?
Dr. Chahine graduated from medical school in 2015, 11 years ago.
Does Dr. Hassan Ali Chahine do research?
Dmand AI links 1 publication to Dr. Chahine.
Who does Dr. Hassan Ali Chahine publish with?
Dr. Chahine's most frequent co-authors are Nadine Grace-Abraham, MD (1 shared paper).
What insurance does Dr. Hassan Ali Chahine accept?
Dr. Chahine is in network with 9 carriers, including United Healthcare, Blue Cross Blue Shield of Michigan and Excellus BlueCross BlueShield. PPO plans come from the most carriers, 6. Check the plan with the practice before a visit.
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