Dr. Diane M. Clausen, MD
- Medicare services, 2024
- 145
- Medicare patients, 2024
- 39
- Part D claims, 2019
- 32
- Industry payments
- $385
- Medical groups
- 2
- Practice address
- 101 Nicholls Road, Stony Brook, NY 11794
- Practice phone
- Call (631) 689-8333
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Stony Brook Internists University Faculty Practice - Stony Brook (Nicholls Road)
Primary care practice · Stony Brook, New York
Find Dr. Clausen's professional email, personal email and mobile number
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Dr. Diane M. Clausen is a hematologist and oncologist in Stony Brook, New York
Dr. Clausen practices at Stony Brook Internists University Faculty Practice - Stony Brook (Nicholls Road) in Stony Brook, New York.
Dr. Clausen's NPI, 1447256995, was assigned on June 21, 2005. Dr. Clausen graduated from Stony Brook University Health Sciences Center School of Medicine in 1990. Dr. Clausen holds New York license 186523.
- NPI
- 1447256995NPI Registry (opens in a new tab)
- NPI enumeration date
- June 21, 2005
- NPI status
- Active
- Practice phone
- (631) 689-8333
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 62
- Medical school graduation
- 1990
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Diane M. Clausen practices at Stony Brook Internists University Faculty Practice - Stony Brook (Nicholls Road) in Stony Brook, New York
Dr. Clausen's primary practice is Stony Brook Internists University Faculty Practice - Stony Brook (Nicholls Road), at 101 Nicholls Road, Stony Brook, NY 11794. The practice phone is (631) 689-8333.
- Stony Brook Internists University Faculty Practice - Stony Brook (Nicholls Road)101 Nicholls Road, Stony Brook, NY 11794Phone(631) 689-8333
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Diane M. Clausen is affiliated with 1 site of care and 2 medical groups
Dr. Clausen's primary practice is Stony Brook Internists University Faculty Practice - Stony Brook (Nicholls Road) in Stony Brook, New York. The medical group on file is Stony Brook Internists. Dmand AI also links Dr. Clausen to 1 more medical group, named with a free account.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. Diane M. Clausen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Clausen practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Stony Brook Internists University Faculty Practice - Stony Brook (Nicholls Road) | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Diane M. Clausen is one of 996 hematologists and oncologists in New York
Hematology and oncology is Dr. Clausen's primary specialty in the NPI Registry, under taxonomy code 207RH0003X. Dr. Clausen is licensed in New York.
Specialties and state licenses
- Hematology and oncology, New YorkPrimary
Hematologists and oncologists near Dr. Clausen
Counts of hematologists and oncologists 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. Diane M. Clausen billed Medicare for 145 services in 2024
CMS data shows 145 Medicare services from Dr. Clausen across 3 procedure codes in 2024, for 39 Medicare patients. Medicare paid $10,948 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Clausen's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Other services
- 2023: 1892024: 8157%
- Office and hospital visits
- 2023: 2792024: 6477%
Dr. Clausen compared with the New York median for hematologists and oncologists, 2024
- Dr. Clausen
- New York median
- Medicare services
- 145vs 66878% below
- Medicare patients
- 39vs 21081% below
- Part D claims
- 32vs 25888% below
Medians across 940 hematologists and oncologists in New York with Dmand AI profiles that report each measure.
Dr. Clausen'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. Clausen and other hematologists and oncologists in New York.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Diane M. Clausen treated 39 Medicare patients in 2024, average age 80
CMS counts 39 Medicare patients who saw Dr. Clausen in 2024. The largest group is 75 to 84, with 17 patients. 75% of them have high blood pressure, and 72% have high cholesterol. Their average risk score is 3.83, 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. Clausen's median patient age at 83, with 51% women.
Dr. Clausen's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Clausen's Medicare patients by sex, 2024
- Women1744%
- Men2256%
Chronic conditions among Dr. Clausen's Medicare patients, 2024
- High blood pressure75%
- High cholesterol72%
- Ischemic heart disease64%
- Alzheimer's and dementia62%
- Atrial fibrillation59%
- COPD56%
- Anxiety51%
- Cancer51%
Share of Medicare patients with each condition. A patient can have several.
Dr. Clausen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 83
Patient panel by sex, all payers
- Women51%
- Men49%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Diane M. Clausen wrote 32 Medicare Part D claims in 2019
In 2019, Dr. Clausen wrote 32 Medicare Part D claims. They cover 2 drugs, with $97,051 in total drug cost. In 2018, CMS named 56 claims across 3 drugs.
Dr. Clausen's most prescribed drugs by claims, 2019
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2018 to 2019
- 2018
- 2019
- Claims for drugs CMS names
- 2018: 562019: 3243%
Drugs named by CMS: 2 in 2019, 3 in 2018.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Diane M. Clausen received $385 in industry payments from 2016 to 2022
CMS Open Payments shows 6 general payments to Dr. Clausen from 5 drug and device companies from 2016 to 2022. Food and beverage make up the largest share, 100% of the total. Medtronic, Inc. paid the most, $131.
General payments to Dr. Clausen by program year, 2016 to 2022
Companies that paid Dr. Clausen the most, 2016 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Diane M. Clausen graduated from Stony Brook University Health Sciences Center School of Medicine
Dr. Clausen graduated from Stony Brook University Health Sciences Center School of Medicine in 1990.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Diane M. Clausen'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 DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile 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. Diane M. Clausen
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. Diane M. Clausen's NPI number?
Dr. Diane M. Clausen's NPI number is 1447256995. It was assigned on June 21, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Diane M. Clausen?
Dr. Diane M. Clausen is a hematologist and oncologist in Stony Brook, New York. The primary specialty in the NPI Registry is Hematology & Oncology Physician (taxonomy code 207RH0003X).
Where does Dr. Diane M. Clausen practice?
Dr. Clausen practices at 101 Nicholls Road, Stony Brook, NY 11794. Dr. Clausen's primary practice is Stony Brook Internists University Faculty Practice - Stony Brook (Nicholls Road) in Stony Brook, New York. Dmand AI also links Dr. Clausen to 1 medical group.
What is Dr. Diane M. Clausen's office phone number?
The practice phone on file for Dr. Clausen is (631) 689-8333.
What is Dr. Diane M. Clausen's medical license number?
Dr. Clausen holds New York license 186523.
What medical group is Dr. Diane M. Clausen part of?
Dr. Clausen is linked to Stony Brook Internists. Dmand AI links Dr. Clausen to 1 more medical group.
Does Dr. Diane M. Clausen accept Medicare?
Yes. CMS data shows Dr. Clausen billed Medicare for 145 services in 2024.
How many Medicare patients does Dr. Diane M. Clausen see?
CMS counts 39 Medicare patients who saw Dr. Clausen in 2024, with an average age of 80.
What services does Dr. Diane M. Clausen bill to Medicare?
In 2024, Dr. Clausen's most billed Medicare services were medicare service (G0316), hospital inpatient care (99223) and hospital inpatient care (99233).
Where did Dr. Diane M. Clausen go to medical school?
Dr. Clausen graduated from Stony Brook University Health Sciences Center School of Medicine in 1990.
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What drugs does Dr. Diane M. Clausen prescribe most?
In 2019 Medicare Part D data, Dr. Clausen's most prescribed drugs by claims were Warfarin Sodium and Thalomid.
Has Dr. Diane M. Clausen received payments from drug or device companies?
CMS Open Payments shows $385 in general payments to Dr. Clausen from 5 companies from 2016 to 2022. The largest total came from Medtronic, Inc.
How long has Dr. Diane M. Clausen been practicing?
Dr. Clausen graduated from medical school in 1990, 36 years ago.
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