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Doctor profile · NPI 1912984238

William Zinn

Diagnostic Radiology

Practice locations

Training in the source record

Credential
MD
Medical school
New York University School Of Medicine
Graduation year
1985

Residency, fellowship and board certification are not supplied by this CMS file.

Before you book

Ask the practice whether this doctor sees patients of your age for your concern, is accepting new patients, and participates in your exact insurance plan at this location.

Ask who will review your records and follow up if your concerns remain unresolved.

View the NPI Registry record

CMS measures of specific care

These are 2024 results reported for this clinician’s NPI. Each CMS rating describes one measure of care, not patient reviews or an overall doctor grade. The patients, ages and insurance types included depend on the measure and collection method; these are not necessarily Medicare-only or pediatric results. They do not establish performance at a particular current practice.

No individual clinical measures approved by CMS for profile display are available for this doctor in this release. Missing results do not mean poor care. Many clinicians or measures are not publicly reported.

Released 2026-09-10. Only CMS display-approved MIPS and QCDR clinical measures are shown; participation attestations and cost measures are excluded. CMS uses a benchmark drawn from best performers covering at least 10% of the relevant patient population, with an adjustment for small denominators. ModernDoc has not independently validated these ratings. Source data and reported rates · CMS rating methodology · Coverage and reporting limits.

Reported procedure activity

CMS attributes these procedures to this clinician through Original Medicare and Medicare Advantage claims and encounters. Counts span locations and are not unique-patient counts. They do not establish quality, current availability, or that a procedure is offered at any practice listed here. Other insurance populations are not included.

No procedure activity is available for display in this release. This does not mean this doctor has no experience.

CMS release 2026-10-15. CMS describes a 12-month observation window with a three-month claims-processing lag; this file does not provide exact start and end dates. Only categories CMS marks for profile display are shown. Source data · How CMS reports procedures.

Patient experience at affiliated groups

These are 2024 survey results for the groups below, not ratings of this doctor. We matched group IDs to affiliation records released 2026-10-15; that does not establish this doctor’s membership during the survey year.

CMS sampled patients with traditional Medicare (fee-for-service), aged 18 or older, who had at least two visits to the group. These results do not describe children’s experiences or all patients and insurance types. Percentages describe respondents choosing the most positive survey response; each measure has its own patient denominator. They do not measure clinical accuracy or current appointment availability. Who CMS surveyed.

City Of Hope Medical Foundation

Getting Timely Care, Appointments, and Information
Not reported: CMS withheld this measure because the sample was too small or reliability was low.
Patient's Rating of Provider
Not reported: CMS withheld this measure because the sample was too small or reliability was low.
Access to Specialists
66% most-positive responses · 103 patients in this measure
Health Promotion and Education
Not reported: CMS withheld this measure because the sample was too small or reliability was low.
Courteous and Helpful Office Staff
Not reported: CMS withheld this measure because the sample was too small or reliability was low.
Care Coordination
Not reported: CMS withheld this measure because the sample was too small or reliability was low.

CMS group survey year 2024 · Released 2026-09-10. View the source data · How CMS reports these measures.

Reconciled from 100 source records. Individual patient reviews and an overall clinical-quality rating are not available.