Dr. Jonathan Ascher, MD
- Medicare services, 2024
- 90
- Medicare patients, 2024
- 107
- Hospital affiliations
- 1
- Industry payments
- $390
- Medical group
- 1
- Practice address
- 3201 Kings Hwy, Brooklyn, NY 11234
- Practice phone
- Call (646) 605-6009
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Mount Sinai - Brooklyn
Brooklyn, New York
Find Dr. Ascher's professional email, personal email and mobile number
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Dr. Jonathan Ascher is an anesthesiologist in Brooklyn, New York
Dr. Ascher practices at Mount Sinai - Brooklyn in Brooklyn, New York.
Dr. Ascher's NPI, 1881699148, was assigned on June 14, 2005. Dr. Ascher graduated from University of Miami, Lm Miller School of Medicine in 1998. Dr. Ascher holds New York license 233250.
- NPI
- 1881699148NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5597718825
- NPI enumeration date
- June 14, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (646) 605-6009
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 54
- Medical school graduation
- 1998
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Jonathan Ascher practices at Mount Sinai - Brooklyn in Brooklyn, New York
Dr. Ascher's primary practice is Mount Sinai - Brooklyn, at 3201 Kings Hwy, Brooklyn, NY 11234 in Kings County. The practice phone is (646) 605-6009.
- Mount Sinai - Brooklyn3201 Kings Hwy, Brooklyn, NY 11234 · Kings CountyPhone(646) 605-6009
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Jonathan Ascher is affiliated with 2 sites of care and 1 medical group
Dr. Ascher's primary practice is Mount Sinai - Brooklyn in Brooklyn, New York. Dr. Ascher is also affiliated with New York Eye and Ear Infirmary of Mount Sinai. The medical group on file is Mount Sinai Doctors.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Jonathan Ascher's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ascher practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mount Sinai - Brooklyn | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Jonathan Ascher is one of 3,858 anesthesiologists in New York
Anesthesiology is Dr. Ascher's primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dr. Ascher is licensed in New York.
Specialties and state licenses
- Anesthesiology, New YorkPrimary
Anesthesiologists near Dr. Ascher
Counts of anesthesiologists 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. Jonathan Ascher billed Medicare for 90 services in 2024
CMS data shows 90 Medicare services from Dr. Ascher across 3 procedure codes in 2024, for 107 Medicare patients. Medicare paid $6,305 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Ascher's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Anesthesia
- 2023: 3012024: 9070%
Dr. Ascher compared with the New York median for anesthesiologists, 2024
- Dr. Ascher
- New York median
- Medicare services
- 90vs 7618% above
- Medicare patients
- 107vs 13219% below
Medians across 3,723 anesthesiologists in New York with Dmand AI profiles that report each measure.
Dr. Ascher'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. Ascher?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Ascher and other anesthesiologists in New York.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Jonathan Ascher treated 107 Medicare patients in 2024, average age 76
CMS counts 107 Medicare patients who saw Dr. Ascher in 2024. The largest group is 75 to 84, with 44 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 23% are also on Medicaid. Their average risk score is 1.35, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Ascher's median patient age at 58, with 53% women.
Dr. Ascher's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Ascher's Medicare patients by sex, 2024
- Women5450%
- Men5350%
Chronic conditions among Dr. Ascher's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis48%
- Diabetes41%
- Ischemic heart disease38%
- Anxiety23%
- Cancer22%
- COPD21%
Share of Medicare patients with each condition. A patient can have several.
Dr. Ascher's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 58
Patient panel by sex, all payers
- Women53%
- Men39%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. Jonathan Ascher takes part in Medicare
Dr. Ascher 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. Jonathan Ascher received $390 in industry payments from 2016 to 2022
CMS Open Payments shows 6 general payments to Dr. Ascher from 3 drug and device companies from 2016 to 2022. Food and beverage make up the largest share, 100% of the total. Intersect ENT, Inc. paid the most, $221.
General payments to Dr. Ascher by program year, 2016 to 2022
Companies that paid Dr. Ascher 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. Jonathan Ascher graduated from University of Miami, Lm Miller School of Medicine
Dr. Ascher graduated from University of Miami, Lm Miller School of Medicine in 1998.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Jonathan Ascher'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (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. Jonathan Ascher
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. Jonathan Ascher's NPI number?
Dr. Jonathan Ascher's NPI number is 1881699148. It was assigned on June 14, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Jonathan Ascher?
Dr. Jonathan Ascher is an anesthesiologist in Brooklyn, New York. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. Jonathan Ascher practice?
Dr. Ascher practices at 3201 Kings Hwy, Brooklyn, NY 11234. Dr. Ascher's primary practice is Mount Sinai - Brooklyn in Brooklyn, New York.
What is Dr. Jonathan Ascher's office phone number?
The practice phone on file for Dr. Ascher is (646) 605-6009.
What is Dr. Jonathan Ascher's medical license number?
Dr. Ascher holds New York license 233250.
Which hospitals is Dr. Jonathan Ascher affiliated with?
Dr. Ascher is affiliated with New York Eye and Ear Infirmary of Mount Sinai.
What medical group is Dr. Jonathan Ascher part of?
Dr. Ascher is linked to Mount Sinai Doctors.
Does Dr. Jonathan Ascher accept Medicare?
Yes. CMS data shows Dr. Ascher billed Medicare for 90 services in 2024, and Dr. Ascher accepts Medicare assignment.
How many Medicare patients does Dr. Jonathan Ascher see?
CMS counts 107 Medicare patients who saw Dr. Ascher in 2024, with an average age of 76.
What services does Dr. Jonathan Ascher bill to Medicare?
In 2024, Dr. Ascher's most billed Medicare services were anesthesia (00142), anesthesia (00140) and anesthesia (00300).
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Where did Dr. Jonathan Ascher go to medical school?
Dr. Ascher graduated from University of Miami, Lm Miller School of Medicine in 1998.
Has Dr. Jonathan Ascher received payments from drug or device companies?
CMS Open Payments shows $390 in general payments to Dr. Ascher from 3 companies from 2016 to 2022. The largest total came from Intersect ENT, Inc.
How long has Dr. Jonathan Ascher been practicing?
Dr. Ascher graduated from medical school in 1998, 28 years ago.
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