Dr. Mark Sonnenschine, DO
- Medicare services, 2024
- 53,499
- Medicare patients, 2024
- 420
- Part D claims, 2024
- 1,212
- Publications
- 1
- Hospital affiliations
- 2
- Practice address
- 4802 Tenth Avenue, Brooklyn, NY 11219
- Practice phone
- Call (718) 283-6000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Sonnenschine'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. Mark Sonnenschine is a hematologist and oncologist in Brooklyn, New York
Dr. Sonnenschine practices at Maimonides Medical Center in Brooklyn, New York, part of Maimonides Medical Center.
Dr. Sonnenschine's NPI, 1922291939, was assigned on August 22, 2007. Dr. Sonnenschine graduated from New York College of Osteo Medicine of New York Institute of Technology in 2003. Dr. Sonnenschine holds New York license 242242.
- NPI
- 1922291939NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1850443870
- NPI enumeration date
- August 22, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (718) 283-6000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 49
- Medical school graduation
- 2003
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark Sonnenschine practices at Maimonides Medical Center in Brooklyn, New York
Dr. Sonnenschine's primary practice is Maimonides Medical Center, at 4802 Tenth Avenue, Brooklyn, NY 11219 in Kings County. The practice phone is (718) 283-6000.
- Maimonides Medical Center4802 Tenth Avenue, Brooklyn, NY 11219 · Kings CountyPhone(718) 283-6000
Source: Dmand AI Affiliation Data
Dr. Mark Sonnenschine is affiliated with 4 sites of care and 2 medical groups
Dr. Sonnenschine's primary practice is Maimonides Medical Center in Brooklyn, New York, part of Maimonides Medical Center. Dr. Sonnenschine is also affiliated with NYC Health + Hospitals/South Brooklyn Health, Ruth Bader Ginsburg Hospital. The medical group on file is Physician Affiliate Group of New York (PAGNY). Dmand AI also links Dr. Sonnenschine to 1 more physician office, 1 home health agency and 1 medical group, 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. Mark Sonnenschine's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Sonnenschine practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Maimonides Medical Center | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Maimonides Medical Center and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Mark Sonnenschine is one of 996 hematologists and oncologists in New York
Hematology and oncology is Dr. Sonnenschine's primary specialty in the NPI Registry, under taxonomy code 207RH0003X. Dr. Sonnenschine is licensed in New York.
Specialties and state licenses
- Hematology and oncology, New YorkPrimary
Hematologists and oncologists near Dr. Sonnenschine
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. Mark Sonnenschine billed Medicare for 53,499 services in 2024
CMS data shows 53,499 Medicare services from Dr. Sonnenschine across 10 procedure codes in 2024, for 420 Medicare patients. Medicare paid $177,257 for them.
Dr. Sonnenschine's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 59,4612024: 51,71013%
- Office and hospital visits
- 2023: 1,7652024: 1,35223%
- Tests and treatments
- 2023: 2742024: 2595%
- Surgery
- 2023: 2152024: 17817%
Where Dr. Sonnenschine's Medicare services took place, 2024
- In an office52,52298%
- In a facility9772%
Dr. Sonnenschine compared with the New York median for hematologists and oncologists, 2024
- Dr. Sonnenschine
- New York median
- Medicare services
- 53,499vs 66880.1 times
- Medicare patients
- 420vs 2102.0 times
- Part D claims
- 610vs 2582.4 times
Medians across 940 hematologists and oncologists in New York with Dmand AI profiles that report each measure.
Dr. Sonnenschine'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. Sonnenschine?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Sonnenschine 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. Mark Sonnenschine treated 420 Medicare patients in 2024, average age 81
CMS counts 420 Medicare patients who saw Dr. Sonnenschine in 2024. The largest group is 85 and over, with 170 patients. 75% of them have diabetes, and 75% have high blood pressure. 68% are also on Medicaid. Their average risk score is 3.19, 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. Sonnenschine's median patient age at 69, with 55% women.
Dr. Sonnenschine's Medicare patients by age, 2024
Dr. Sonnenschine's Medicare patients by sex, 2024
- Women22153%
- Men19947%
Chronic conditions among Dr. Sonnenschine's Medicare patients, 2024
- Diabetes75%
- High blood pressure75%
- High cholesterol75%
- Arthritis70%
- Ischemic heart disease65%
- Heart failure61%
- Chronic kidney disease54%
- Atrial fibrillation44%
Share of Medicare patients with each condition. A patient can have several.
Dr. Sonnenschine's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women55%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Mark Sonnenschine wrote 1,212 Medicare Part D claims in 2024
In 2024, Dr. Sonnenschine wrote 1,212 Medicare Part D claims for 153 patients. 73% of them were for generic drugs. CMS names the drug for 610 of them, across 34 drugs with 11 or more claims each, at $522,565 in total drug cost. In 2023, CMS named 746 claims across 44 drugs.
Dr. Sonnenschine's Part D claims by kind of drug, 2024
- Generic882 claims73%
- Brand-name and other330 claims27%
Dr. Sonnenschine'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. Sonnenschine's Part D claims, 2024
- Opioids9%107 of 1,212 claims
- Antibiotics8%98 of 1,212 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: 7462024: 61018%
Drugs named by CMS: 34 in 2024, 44 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
Dr. Mark Sonnenschine offers telehealth to Medicare patients
Dr. Sonnenschine accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Sonnenschine as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Removal of tissue: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Mark Sonnenschine has 1 publication on record
Dmand AI links 1 paper to Dr. Sonnenschine in 2020. Dr. Sonnenschine's most frequent co-author is Abdul Basit, MD.
Dr. Sonnenschine's most frequent co-authors
Recent publications by Dr. Sonnenschine
See who Dr. Sonnenschine researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Sonnenschine works with, so you can find a warm path to the right hematologists and oncologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Mark Sonnenschine received $17,400 in industry payments from 2016 to 2025
CMS Open Payments shows 714 general payments to Dr. Sonnenschine from 54 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 79% of the total. Novartis Pharmaceuticals Corporation paid the most, $3,892.
General payments to Dr. Sonnenschine by program year, 2016 to 2025
General payments to Dr. Sonnenschine by kind, 2016 to 2025
- Food and beverage$13,66979%
- Device or supply loans$1,3658%
- Education$1,2157%
- Gifts$1,1527%
Companies that paid Dr. Sonnenschine 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. Mark Sonnenschine graduated from New York College of Osteo Medicine of New York Institute of Technology
Dr. Sonnenschine graduated from New York College of Osteo Medicine of New York Institute of Technology in 2003.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Mark Sonnenschine'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)Doctors and Clinicians Utilization Data (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 |
| 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. Mark Sonnenschine
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. Mark Sonnenschine's NPI number?
Dr. Mark Sonnenschine's NPI number is 1922291939. It was assigned on August 22, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark Sonnenschine?
Dr. Mark Sonnenschine is a hematologist and oncologist in Brooklyn, New York. The primary specialty in the NPI Registry is Hematology & Oncology Physician (taxonomy code 207RH0003X).
Where does Dr. Mark Sonnenschine practice?
Dr. Sonnenschine practices at 4802 Tenth Avenue, Brooklyn, NY 11219. Dr. Sonnenschine's primary practice is Maimonides Medical Center in Brooklyn, New York, part of Maimonides Medical Center. Dmand AI also links Dr. Sonnenschine to 1 physician office, 1 home health agency and 1 medical group.
What is Dr. Mark Sonnenschine's office phone number?
The practice phone on file for Dr. Sonnenschine is (718) 283-6000.
What is Dr. Mark Sonnenschine's medical license number?
Dr. Sonnenschine holds New York license 242242.
Which hospitals is Dr. Mark Sonnenschine affiliated with?
Dr. Sonnenschine practices at Maimonides Medical Center in Brooklyn, New York. Dr. Sonnenschine is also affiliated with NYC Health + Hospitals/South Brooklyn Health, Ruth Bader Ginsburg Hospital.
What medical group is Dr. Mark Sonnenschine part of?
Dr. Sonnenschine is linked to Physician Affiliate Group of New York (PAGNY). Dmand AI links Dr. Sonnenschine to 1 more medical group.
Does Dr. Mark Sonnenschine accept Medicare?
Yes. CMS data shows Dr. Sonnenschine billed Medicare for 53,499 services in 2024, and Dr. Sonnenschine accepts Medicare assignment.
Does Dr. Mark Sonnenschine offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Sonnenschine as offering telehealth services.
How many Medicare patients does Dr. Mark Sonnenschine see?
CMS counts 420 Medicare patients who saw Dr. Sonnenschine in 2024, with an average age of 81.
Show 7 more questionsShow fewer questions
What services does Dr. Mark Sonnenschine bill to Medicare?
In 2024, Dr. Sonnenschine's most billed Medicare services were injected or infused drug (J1439), injected or infused drug (J0885) and hospital inpatient care (99232).
Where did Dr. Mark Sonnenschine go to medical school?
Dr. Sonnenschine graduated from New York College of Osteo Medicine of New York Institute of Technology in 2003.
What drugs does Dr. Mark Sonnenschine prescribe most?
In 2024 Medicare Part D data, Dr. Sonnenschine's most prescribed drugs by claims were Procrit, Mupirocin and Gabapentin.
Has Dr. Mark Sonnenschine received payments from drug or device companies?
CMS Open Payments shows $17,400 in general payments to Dr. Sonnenschine from 54 companies from 2016 to 2025. The largest total came from Novartis Pharmaceuticals Corporation.
How long has Dr. Mark Sonnenschine been practicing?
Dr. Sonnenschine graduated from medical school in 2003, 23 years ago.
Does Dr. Mark Sonnenschine do research?
Dmand AI links 1 publication to Dr. Sonnenschine.
Who does Dr. Mark Sonnenschine publish with?
Dr. Sonnenschine's most frequent co-authors are Abdul Basit, MD (1 shared paper).
Selling to hematology and oncology practices?
See hematologists and oncologists in New York by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card