Dr. William Marx, MD
- Medicare services, 2024
- 186
- Medicare patients, 2024
- 197
- MIPS score, 2024
- 78
- Hospital affiliations
- 1
- Medical groups
- 3
- Practice address
- 1275 York Avenue, New York, NY 10065
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Marx's professional email, personal email and mobile number
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Dr. William Marx is an anesthesiologist in New York, New York
Dr. Marx practices at Memorial Sloan Kettering Cancer Center in New York, New York, part of Memorial Sloan Kettering Cancer Center.
Dr. Marx's NPI, 1205802311, was assigned on February 28, 2006. Dr. Marx holds New York license 134545.
- NPI
- 1205802311NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0547449514
- NPI enumeration date
- February 28, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 79
- Medical school graduation
- 1973
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. William Marx practices at Memorial Sloan Kettering Cancer Center in New York, New York
Dr. Marx's primary practice is Memorial Sloan Kettering Cancer Center, at 1275 York Avenue, New York, NY 10065.
- Memorial Sloan Kettering Cancer Center1275 York Avenue, New York, NY 10065
Source: Dmand AI Affiliation Data
Dr. William Marx is affiliated with 4 sites of care and 3 medical groups
Dr. Marx's primary practice is Memorial Sloan Kettering Cancer Center in New York, New York, part of Memorial Sloan Kettering Cancer Center. The medical group on file is Memorial Sloan Kettering Cancer Center. Dmand AI also links Dr. Marx to 3 more group practices and clinics and 2 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. William Marx's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Marx practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Memorial Sloan Kettering Cancer Center | Available with a free account |
| +3 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. William Marx is one of 3,858 anesthesiologists in New York
Anesthesiology is Dr. Marx's primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dr. Marx is licensed in New York.
Specialties and state licenses
- Anesthesiology, New YorkPrimary
Anesthesiologists near Dr. Marx
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. William Marx billed Medicare for 186 services in 2024
CMS data shows 186 Medicare services from Dr. Marx across 4 procedure codes in 2024, for 197 Medicare patients. Medicare paid $37,121 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Marx's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Anesthesia
- 2023: 1112024: 13118%
- Surgery
- 2023: 572024: 554%
Dr. Marx compared with the New York median for anesthesiologists, 2024
- Dr. Marx
- New York median
- Medicare services
- 186vs 762.4 times
- Medicare patients
- 197vs 13249% above
Medians across 3,723 anesthesiologists in New York with Dmand AI profiles that report each measure.
Dr. Marx'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. Marx and other anesthesiologists in New York.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. William Marx treated 197 Medicare patients in 2024, average age 73
CMS counts 197 Medicare patients who saw Dr. Marx in 2024. The largest group is 65 to 74, with 88 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 12% are also on Medicaid. Their average risk score is 2.41, 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. Marx's median patient age at 54, with 65% women.
Dr. Marx's Medicare patients by age, 2024
Dr. Marx's Medicare patients by sex, 2024
- Women9950%
- Men9850%
Chronic conditions among Dr. Marx's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis63%
- Cancer56%
- Anxiety49%
- Mood disorders39%
- Diabetes36%
- Depression35%
Share of Medicare patients with each condition. A patient can have several.
Dr. Marx's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 54
Patient panel by sex, all payers
- Women65%
- Men31%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. William Marx scored 78 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 78 out of 100 for Dr. Marx for performance year 2024, reported as part of a group. Dr. Marx accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Marx's MIPS scores, performance year 2024
- 78of 100Final score
- 80.6of 100Quality
- 40of 100Improvement Activities
- 50of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Sources for Dr. William Marx'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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (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. William Marx
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. William Marx's NPI number?
Dr. William Marx's NPI number is 1205802311. It was assigned on February 28, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. William Marx?
Dr. William Marx is an anesthesiologist in New York, New York. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. William Marx practice?
Dr. Marx practices at 1275 York Avenue, New York, NY 10065. Dr. Marx's primary practice is Memorial Sloan Kettering Cancer Center in New York, New York, part of Memorial Sloan Kettering Cancer Center. Dmand AI also links Dr. Marx to 3 group practices and clinics and 2 medical groups.
What is Dr. William Marx's medical license number?
Dr. Marx holds New York license 134545.
Which hospitals is Dr. William Marx affiliated with?
Dr. Marx practices at Memorial Sloan Kettering Cancer Center in New York, New York.
What medical group is Dr. William Marx part of?
Dr. Marx is linked to Memorial Sloan Kettering Cancer Center. Dmand AI links Dr. Marx to 2 more medical groups.
Does Dr. William Marx accept Medicare?
Yes. CMS data shows Dr. Marx billed Medicare for 186 services in 2024, and Dr. Marx accepts Medicare assignment.
What is Dr. William Marx's MIPS score?
Dr. Marx's MIPS final score for performance year 2024 is 78 out of 100, reported as part of a group.
How many Medicare patients does Dr. William Marx see?
CMS counts 197 Medicare patients who saw Dr. Marx in 2024, with an average age of 73.
What services does Dr. William Marx bill to Medicare?
In 2024, Dr. Marx's most billed Medicare services were anesthesia (00210), surgery: heart and blood vessels (36620) and anesthesia (00670).
How long has Dr. William Marx been practicing?
Dr. Marx graduated from medical school in 1973, 53 years ago.
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