William M. Cornachio
On the New York attorney register since 1978 · office in Uniondale, NY
PlainAttorney’s reading of the public register file, not a court record.
- Registration No.
- 1303874
- Admitted
- 1978 · First Department
- Status
- Due to re‑register
- Next registration
- Jan 2026
William M. Cornachio is due to re‑register on the New York attorney register file of Sep 29, 2026. Admitted in 1978 in the First Department, with an office in Uniondale, NY; next registration due Jan 2026. The status is the same in all 3 files we hold. The registration was due in Jan 2026 and the register has not recorded it as filed.
What this status means on the register
On the register, “Due to re‑register” means the attorney has a biennial registration falling due or overdue: the rule asks for it within 30 days after the attorney’s birthday in each alternate year, and the record gives the month it is due. The value stays until the register records the filing or marks the registration delinquent, so the month can have passed; by itself it is not a finding.
- Due to re‑register unchanged
- Due to re‑register unchanged
- Due to re‑register the first file we hold
Source: NY Office of Court Administration, attorney registration file (data.ny.gov, dataset eqw2-r5nb), downloaded Sep 29, 2026; the Jul 3, 2026 and Aug 6, 2026 files for the history.
Others who list this employer on the register
214 other attorneys list Rivkin Radler LLP or one of its other names as their employer on the register; 6 of them were admitted before 1978, and 167 of the 215 give an office in Uniondale, NY. The 5 whose admission is closest to 1978, earliest first:
| Attorney | Admitted | Status |
|---|---|---|
| Burton R. Ross | 1977 | Currently registered |
| David Lobl | 1978 | Currently registered |
| Marc Paul Gorfinkel | 1979 | Currently registered |
| Joel Mark Greenberg | 1980 | Currently registered |
| Walter J. Gumersell | 1980 | Currently registered |
Source: NY Office of Court Administration, attorney registration file (data.ny.gov, dataset eqw2-r5nb), downloaded Sep 29, 2026; employer spellings merged (methodology).
Where this record sits on the register
William M. Cornachio studied at Fordham University School of Law (the register spells it “FORDHAM UNIVERSITY”). 1,515 of its 20,418 living graduates on the register were admitted in the 1970s, as William M. Cornachio was.
- Same law school
- 20,418living graduates; 87.9% registered (current or due), against 87.1% overall
- Office in Uniondale, NY
- 894living registrants
Of the 894 living registrants with an office in Uniondale, NY, 27 were admitted before 1978 and 857 after.
Source: NY Office of Court Administration, attorney registration file (data.ny.gov, dataset eqw2-r5nb), downloaded Sep 29, 2026; living registrants only.
Questions this record leads to
- Everyone who lists Rivkin Radler LLP215 on the register, 6 of the others admitted before 1978; 167 of the 215 give an office in Uniondale, NY.
- Fordham University School of Law graduates on the register20,418 living, 87.9% registered.
- Attorneys with an office in Uniondale, NY894 living registrants give an office there.
- Nassau County’s registered bar9,622 currently registered, 6.92 per 1,000 residents.
- Admitted in 19783,834 people admitted in 1978 are on the register, 1,466 of them through the First Department.
- Every registration that reads “Due to re‑register”47,986 on the register file of Sep 29, 2026, by decade of admission.
- What a New York lawyer may chargeThe court rules on fees, retainers and fee disputes, each cited.
How to confirm it officially
For a statement of William M. Cornachio’s standing, contact the Attorney Registration Unit of the NY Office of Court Administration (nycourts.gov/attorneys), or ask the Appellate Division, First Department, which admitted William M. Cornachio in 1978. A complaint about this attorney would go to the Second Department’s Grievance Committee for the Tenth Judicial District, which covers Nassau County, where the register places the office.
This page reads the register file of Sep 29, 2026, and the court system’s own search can be newer; the register shows only the current value, so a suspension that ended before the files we hold, or a censure, leaves no trace here (Appellate Division decisions are published through the court system’s Law Reporting Bureau).