Dr. Ammar Hasan, MD
- Medicare services, 2024
- 508
- Medicare patients, 2024
- 200
- Part D claims, 2024
- 87
- Publications
- 2
- Hospital affiliations
- 2
- Practice address
- 22999 Us Hwy 59, Kingwood, TX 77325
- Practice phone
- Call (281) 359-7500
- 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
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. Ammar Hasan is an internist in Kingwood, Texas
Dr. Hasan practices at HCA Houston Healthcare Kingwood in Kingwood, Texas, part of HCA Healthcare.
Dr. Hasan's NPI, 1215596523, was assigned on June 10, 2019. Dr. Hasan holds Texas license T4639.
- NPI
- 1215596523NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4688059397
- NPI enumeration date
- June 10, 2019
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (281) 359-7500
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 36
- Medical school graduation
- 2016
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ammar Hasan practices at HCA Houston Healthcare Kingwood in Kingwood, Texas
Dr. Hasan's primary practice is HCA Houston Healthcare Kingwood, at 22999 Us Hwy 59, Kingwood, TX 77325 in Harris County. The practice phone is (281) 359-7500.
- HCA Houston Healthcare Kingwood22999 Us Hwy 59, Kingwood, TX 77325 · Harris CountyPhone(281) 359-7500
Source: Dmand AI Affiliation Data
Dr. Ammar Hasan is affiliated with 2 sites of care and 6 medical groups
Dr. Hasan's primary practice is HCA Houston Healthcare Kingwood in Kingwood, Texas, part of HCA Healthcare. Dr. Hasan is also affiliated with Olympia Fields Hospital. The medical group on file is Lonestar Hospital Medicine Associates, PA. Dmand AI also links Dr. Hasan to 5 more medical groups, 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. Ammar Hasan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hasan practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| HCA Houston Healthcare Kingwood | Available with a free account |
| +1 more site and 5 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Ammar Hasan is one of 8,437 internists in Texas
Internal medicine is Dr. Hasan's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dmand AI has Dr. Hasan's licenses on file in 2 states: Texas and Illinois.
Specialties and state licenses
- Internal medicine, TexasPrimary
- Hospitalist, Illinois
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. Ammar Hasan billed Medicare for 508 services in 2024
CMS data shows 508 Medicare services from Dr. Hasan across 5 procedure codes in 2024, for 200 Medicare patients. Medicare paid $36,811 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Hasan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 6462024: 50821%
Dr. Hasan compared with the Texas median for internists, 2024
- Dr. Hasan
- Texas median
- Medicare services
- 508vs 5396% below
- Medicare patients
- 200vs 1905% above
- Part D claims
- 38vs 28987% below
Medians across 7,794 internists in Texas with Dmand AI profiles that report each measure.
Dr. Hasan'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. Hasan?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Hasan and other internists in Texas.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Ammar Hasan treated 200 Medicare patients in 2024, average age 74
CMS counts 200 Medicare patients who saw Dr. Hasan in 2024. The largest group is 75 to 84, with 69 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 25% are also on Medicaid. Their average risk score is 2.90, 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. Hasan's median patient age at 62, with 56% women.
Dr. Hasan's Medicare patients by age, 2024
Dr. Hasan's Medicare patients by sex, 2024
- Women9849%
- Men10251%
Chronic conditions among Dr. Hasan's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes61%
- Heart failure61%
- Ischemic heart disease61%
- Chronic kidney disease55%
- Arthritis49%
- COPD49%
Share of Medicare patients with each condition. A patient can have several.
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 62
Patient panel by sex, all payers
- Women56%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Ammar Hasan wrote 87 Medicare Part D claims in 2024
In 2024, Dr. Hasan wrote 87 Medicare Part D claims for 48 patients. 91% of them were for generic drugs. CMS names the drug for 38 of them, across 3 drugs with 11 or more claims each, at $207 in total drug cost.
Dr. Hasan's Part D claims by kind of drug, 2024
- Generic79 claims91%
- Brand-name and other8 claims9%
Dr. Hasan's most prescribed drugs by claims, 2023
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
- Antibiotics18%16 of 87 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
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. Ammar 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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Dr. Ammar Hasan has 2 publications on record
Dmand AI links 2 papers to Dr. Hasan, published from 2021 to 2022. Dr. Hasan has published most often in Cureus. Dr. Hasan's most frequent co-authors are Salman Raza Alim, MD, Matthew Hart Bear, DO and Samer M. Elfallal, DO.
Dr. Hasan's most frequent co-authors
- Salman Raza Alim, MD2 shared papers
- Matthew Hart Bear, DO1 shared paper
- Samer M. Elfallal, DO1 shared paper
Recent publications by Dr. Hasan
See who Dr. Hasan researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Hasan 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. Ammar Hasan received $323 in industry payments in 2025
CMS Open Payments shows 4 general payments to Dr. Hasan from 2 drug and device companies in 2025. Food and beverage make up the largest share, 59% of the total. Align Technology, Inc. paid the most, $173.
General payments to Dr. Hasan by kind, 2025 to 2025
- Food and beverage$18959%
- Education$12539%
- Gifts$93%
Companies that paid Dr. Hasan the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Ammar 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 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) |
| 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. Ammar 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. Ammar Hasan's NPI number?
Dr. Ammar Hasan's NPI number is 1215596523. It was assigned on June 10, 2019, and it is active in the NPI Registry.
What kind of doctor is Dr. Ammar Hasan?
Dr. Ammar Hasan is an internist in Kingwood, Texas. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Ammar Hasan practice?
Dr. Hasan practices at 22999 Us Hwy 59, Kingwood, TX 77325. Dr. Hasan's primary practice is HCA Houston Healthcare Kingwood in Kingwood, Texas, part of HCA Healthcare. Dmand AI also links Dr. Hasan to 5 medical groups.
What is Dr. Ammar Hasan's office phone number?
The practice phone on file for Dr. Hasan is (281) 359-7500.
What is Dr. Ammar Hasan's medical license number?
Dr. Hasan holds Texas license T4639, one of the licenses on file in 2 states.
Which states has Dr. Ammar Hasan been licensed in?
Dmand AI has state licenses on file for Dr. Hasan in Texas and Illinois.
Which hospitals is Dr. Ammar Hasan affiliated with?
Dr. Hasan practices at HCA Houston Healthcare Kingwood in Kingwood, Texas. Dr. Hasan is also affiliated with Olympia Fields Hospital.
What medical group is Dr. Ammar Hasan part of?
Dr. Hasan is linked to Lonestar Hospital Medicine Associates, PA. Dmand AI links Dr. Hasan to 5 more medical groups.
Does Dr. Ammar Hasan accept Medicare?
Yes. CMS data shows Dr. Hasan billed Medicare for 508 services in 2024, and Dr. Hasan accepts Medicare assignment.
How many Medicare patients does Dr. Ammar Hasan see?
CMS counts 200 Medicare patients who saw Dr. Hasan in 2024, with an average age of 74.
Show 6 more questionsShow fewer questions
What services does Dr. Ammar Hasan bill to Medicare?
In 2024, Dr. Hasan's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99233) and hospital inpatient care (99238).
What drugs does Dr. Ammar Hasan prescribe most?
In 2023 Medicare Part D data, Dr. Hasan's most prescribed drugs by claims were Prednisone, Pantoprazole Sodium and Amlodipine Besylate.
Has Dr. Ammar Hasan received payments from drug or device companies?
CMS Open Payments shows $323 in general payments to Dr. Hasan from 2 companies from 2025 to 2025. The largest total came from Align Technology, Inc.
How long has Dr. Ammar Hasan been practicing?
Dr. Hasan graduated from medical school in 2016, 10 years ago.
Does Dr. Ammar Hasan do research?
Dmand AI links 2 publications to Dr. Hasan, published from 2021 to 2022.
Who does Dr. Ammar Hasan publish with?
Dr. Hasan's most frequent co-authors are Salman Raza Alim, MD (2 shared papers), Matthew Hart Bear, DO (1 shared paper) and Samer M. Elfallal, DO (1 shared paper).
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