William Marx, MD
Anesthesiology Physician · New York, NY
William Marx, MD is an anesthesiology physician with a practice address in New York, New York, and NPI 1205802311, issued on Feb 28, 2006. Check the license (New York 134545, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- William Marx
- Credential
- MD
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- 134545 NY
Self-reported in NPPES; status is on the state search - Practice location
- 1275 York Ave, New York, NY 10021
- Phone
- (212) 639-2000
- Enumerated
- Feb 28, 2006
- Record last updated
- Apr 6, 2015 (not updated in 11 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20110121001011); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 5,062 in New York → Look up another NPI →
Also registered at 1275 York Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify William Marx in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 134545Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 87.1 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through 2 group practices
- Memorial Anesthesiology GroupNew York, NY
- Mskcc Regional NetworkCommack, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Marx among 5,062 anesthesiology physician records in New York
William Marx, MD is one of 5,062 anesthesiology physician records with a practice address in New York. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 16% of them.
- NPI issued2006 · 16% of these records are older, 52% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated1973 · median 2006 among the 3,612 with a school on file
- Record last updated2015 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207L00000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,418 anesthesiology physician records list a practice address in New York
They are 1,418 of the 98,468 NPPES records with a practice address in New York, and 5,062 anesthesiology physician records in New York.
All 5,062 in New York → Every provider in New York → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- Paul Alfano, M.D.New York, NY 100211154327294
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- Shanthamallappa Ashok, MDNew York, NY 100211942206081
- Ravinder Cheruku, MDNew York, NY 100211265438311
- Wayne Cutler, MDNew York, NY 100211952307001
- Janice Francis, MDNew York, NY 100211336145416
- Murugesu Gajapathy, MDNew York, NY 100211598761678
- Marisol Garcia, MDNew York, NY 100211861498941
Common questions
What is William Marx, MD's NPI number?
William Marx, MD's National Provider Identifier (NPI) is 1205802311, issued on Feb 28, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Marx, MD located?
The NPPES record lists a practice address at 1275 York Ave, New York, NY, 10021. Phone: (212) 639-2000. Providers update this record themselves, so call before visiting.
How can I verify William Marx, MD's license?
NPPES lists New York license number 134545, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
What is William Marx, MD's MIPS final score?
The 2023 MIPS final score is 87.1 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.