Dr. Ambreen Hasan, MD
- Part D claims, 2024
- 2,225
- Hospital affiliations
- 1
- Medical group
- 1
- State license
- 1
- Year NPI issued
- 2008
- Practice address
- 9961 Sierra Ave, Fontana, CA 92335
- Practice phone
- Call (909) 427-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Hasan's professional email, personal email and mobile number
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Dr. Ambreen Hasan is an internist in Fontana, California
Dr. Hasan practices at Fontana Medical Center in Fontana, California, part of Kaiser Permanente.
Dr. Hasan's NPI, 1265600910, was assigned on February 15, 2008. Dr. Hasan holds Pennsylvania license MT 190257.
- NPI
- 1265600910NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4486825700
- NPI enumeration date
- February 15, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (909) 427-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 52
- Medical school graduation
- 2000
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ambreen Hasan practices at Fontana Medical Center in Fontana, California
Dr. Hasan's primary practice is Fontana Medical Center, at 9961 Sierra Ave, Fontana, CA 92335 in San Bernardino County. The practice phone is (909) 427-5000.
- Fontana Medical Center9961 Sierra Ave, Fontana, CA 92335 · San Bernardino CountyPhone(909) 427-5000
Source: Dmand AI Affiliation Data
Dr. Ambreen Hasan is affiliated with 1 site of care and 1 medical group
Dr. Hasan's primary practice is Fontana Medical Center in Fontana, California, part of Kaiser Permanente. The medical group on file is Southern California Permanente Medical Group.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Ambreen Hasan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hasan practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Fontana Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Ambreen Hasan is one of 16,751 internists in California
Internal medicine is Dr. Hasan's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Hasan is licensed in Pennsylvania.
Specialties and state licenses
- Internal medicine, PennsylvaniaPrimary
Internists near Dr. Hasan
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. Ambreen Hasan's patients have a median age of 51
Across all payers, Dmand AI patient panel data puts Dr. Hasan's median patient age at 51, with 80% women.
Dr. Hasan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 51
Patient panel by sex, all payers
- Women80%
- Men20%
Source: Dmand AI Patient Panel Data
Dr. Ambreen Hasan wrote 2,225 Medicare Part D claims in 2024
In 2024, Dr. Hasan wrote 2,225 Medicare Part D claims for 217 patients. 88% of them were for generic drugs. CMS names the drug for 1,799 of them, across 47 drugs with 11 or more claims each, at $89,502 in total drug cost. In 2023, CMS named 1,967 claims across 52 drugs.
Dr. Hasan's Part D claims by kind of drug, 2024
- Generic1,962 claims88%
- Brand-name218 claims10%
- Other45 claims2%
Dr. Hasan'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. Hasan's Part D claims, 2024
- Opioids2%35 of 2,225 claims
- Antibiotics2%42 of 2,225 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: 1,9672024: 1,7999%
Drugs named by CMS: 47 in 2024, 52 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. Ambreen Hasan takes part in Medicare
Dr. Hasan 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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Sources for Dr. Ambreen Hasan'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 patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| 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) |
| 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. Ambreen Hasan
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. Ambreen Hasan's NPI number?
Dr. Ambreen Hasan's NPI number is 1265600910. It was assigned on February 15, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Ambreen Hasan?
Dr. Ambreen Hasan is an internist in Fontana, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Ambreen Hasan practice?
Dr. Hasan practices at 9961 Sierra Ave, Fontana, CA 92335. Dr. Hasan's primary practice is Fontana Medical Center in Fontana, California, part of Kaiser Permanente.
What is Dr. Ambreen Hasan's office phone number?
The practice phone on file for Dr. Hasan is (909) 427-5000.
What is Dr. Ambreen Hasan's medical license number?
Dr. Hasan holds Pennsylvania license MT 190257.
Which hospitals is Dr. Ambreen Hasan affiliated with?
Dr. Hasan practices at Fontana Medical Center in Fontana, California.
What medical group is Dr. Ambreen Hasan part of?
Dr. Hasan is linked to Southern California Permanente Medical Group.
Does Dr. Ambreen Hasan accept Medicare?
Yes. CMS lists Dr. Hasan as accepting Medicare assignment.
What drugs does Dr. Ambreen Hasan prescribe most?
In 2024 Medicare Part D data, Dr. Hasan's most prescribed drugs by claims were Atorvastatin Calcium, Losartan Potassium and Amlodipine Besylate.
How long has Dr. Ambreen Hasan been practicing?
Dr. Hasan graduated from medical school in 2000, 26 years ago.
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