Michael Thomas Heffernan
On the New York attorney register since 1973 · office in Great Neck, NY
PlainAttorney’s reading of the public register file, not a court record.
- Registration No.
- 1463686
- Admitted
- 1973 · First Department
- Status
- Currently registered
- Next registration
- Dec 2026
Michael Thomas Heffernan is currently registered on the New York attorney register file of Sep 29, 2026. Admitted in 1973 in the First Department, with an office in Great Neck, NY; next registration due Dec 2026. The status is the same in all 3 files we hold.
What this status means on the register
On the register, “Currently registered” means Michael Thomas Heffernan has filed the biennial registration the court system requires; the next one is due in Dec 2026.
- Currently registered unchanged
- Currently registered unchanged
- Currently registered 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 “Mirkin and Gordon PC”. We count that spelling with Mirkin & Gordon, P.C., the name most registrants give for the firm now; the register does not say where the attorney works today.
10 other attorneys list Mirkin & Gordon, P.C. or one of its other names as their employer on the register; 0 of them were admitted before 1973, and 3 of the 11 give an office in Great Neck, NY. The 5 whose admission is closest to 1973, earliest first:
| Attorney | Admitted | Status |
|---|---|---|
| Joel Spivak | 1973 | Currently registered |
| Donna M. Cliff | 1986 | Currently registered |
| E Lisa Forte | 1987 | Currently registered |
| Arthur J. Diberardino | 1992 | Currently registered |
| Brett David Morris Herr | 2003 | 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
Michael Thomas Heffernan studied at Northwestern University Pritzker School of Law (the register spells it “NORTHWESTERN U”). 46 of its 3,128 living graduates on the register were admitted in the 1970s, as Michael Thomas Heffernan was.
- Same law school
- 3,128living graduates; 87.0% registered (current or due), against 87.1% overall
- Office in Great Neck, NY
- 585living registrants
Of the 585 living registrants with an office in Great Neck, NY, 38 were admitted before 1973 and 541 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 Mirkin & Gordon, P.C.11 on the register, 0 of the others admitted before 1973; 3 of the 11 give an office in Great Neck, NY.
- Northwestern University Pritzker School of Law graduates on the register3,128 living, 87.0% registered.
- Attorneys with an office in Great Neck, NY585 living registrants give an office there.
- Nassau County’s registered bar9,622 currently registered, 6.92 per 1,000 residents.
- Admitted in 19732,460 people admitted in 1973 are on the register, 907 of them through the First Department.
- Every registration that reads “Currently registered”286,911 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 Michael Thomas Heffernan’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 Michael Thomas Heffernan in 1973. 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).