Joseph Carroll Mahon
On the New York attorney register since 1983 · office in New York, NY
PlainAttorney’s reading of the public register file, not a court record.
- Registration No.
- 1847185
- Admitted
- 1983 · First Department
- Status
- Delinquent
- Next registration
- Aug 2027
Joseph Carroll Mahon is delinquent on the New York attorney register file of Sep 29, 2026. Admitted in 1983 in the First Department, with an office in New York, NY; next registration due Aug 2027. The status is the same in all 3 files we hold. The month shown is the next cycle’s; the delinquency concerns an earlier registration the register did not receive.
What this status means on the register
On the register, “Delinquent” means the attorney has a registration the register shows as due and not received. Under the rule a failure to register results in referral to the Appellate Division for disciplinary action; the register does not show whether a given attorney was referred.
- Delinquent unchanged
- Delinquent unchanged
- Delinquent 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
The register gives this attorney’s employer as “Cooper Levenson, Attorneys at Law”. We count that spelling with Cooper Levenson, the name most registrants give for the firm now; the register does not say where the attorney works today.
8 other attorneys list Cooper Levenson or one of its other names as their employer on the register; 1 of them was admitted before 1983. The 5 whose admission is closest to 1983, earliest first:
| Attorney | Admitted | Status |
|---|---|---|
| Lloyd D. Levenson | 1981 | Currently registered |
| Justin Daniel Santagata | 2010 | Due to re‑register |
| Leo Thomas Hendges | 2011 | Currently registered |
| Jarad Kim Stiles | 2012 | Currently registered |
| Russell Lane Lichtenstein | 2017 | 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
Joseph Carroll Mahon studied at Rutgers Law School (the register spells it “RUTGERS”). 1,079 of its 7,506 living graduates on the register were admitted in the 1980s, as Joseph Carroll Mahon was.
- Same law school
- 7,506living graduates; 84.1% registered (current or due), against 87.1% overall
- Office in New York, NY
- 93,604living registrants
Of the 93,604 living registrants with an office in New York, NY, 7,088 were admitted before 1983 and 85,676 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
- Rutgers Law School graduates on the register7,506 living, 84.1% registered.
- Attorneys with an office in New York, NY93,604 living registrants give an office there.
- New York County’s registered bar75,989 currently registered, 46.63 per 1,000 residents.
- Admitted in 19835,424 people admitted in 1983 are on the register, 1,821 of them through the First Department.
- Every registration that reads “Delinquent”15,500 on the register file of Sep 29, 2026, by decade of admission.
- How to complain about a New York lawyerThe grievance committee for each county, and what it can do.
How to confirm it officially
For a statement of Joseph Carroll Mahon’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 Joseph Carroll Mahon in 1983. A complaint about this attorney would go to the First Department’s grievance committee, which covers New York 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).