Michael David Mattheiss
On the New York attorney register since 2018 · office in Playa Vista, CA
PlainAttorney’s reading of the public register file, not a court record.
- Registration No.
- 5562228
- Admitted
- 2018 · Second Department
- Status
- Currently registered
- Next registration
- Dec 2026
Michael David Mattheiss is currently registered on the New York attorney register file of Sep 29, 2026. Admitted in 2018 in the Second Department, with an office in Playa Vista, CA; 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 David Mattheiss 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
139 other attorneys list Gunderson Dettmer Stough Villeneuve Franklin & Hachigian, LLP or one of its other names as their employer on the register; 74 of them were admitted before 2018. The 5 whose admission is closest to 2018, earliest first:
| Attorney | Admitted | Status |
|---|---|---|
| Sujata Awasthi | 2018 | Currently registered |
| Traci Ann Biedermann | 2018 | Currently registered |
| Kelly Rose Flanagan | 2018 | Currently registered |
| Jason Pin Kuo | 2018 | Delinquent |
| Cyrus Max Perlman | 2018 | Currently registered |
All 140 registrations that list Gunderson Dettmer Stough Villeneuve Franklin & Hachigian, LLP
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 David Mattheiss studied at Harvard Law School. 3,482 of its 14,378 living graduates on the register were admitted in the 2010s, as Michael David Mattheiss was.
- Same law school
- 14,378living graduates; 86.1% registered (current or due), against 87.1% overall
- Office in Playa Vista, CA
- 22living registrants (outside New York State)
Of the 22 living registrants with an office in Playa Vista, CA, 19 were admitted before 2018 and 2 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 Gunderson Dettmer Stough Villeneuve Franklin & Hachigian, LLP140 on the register, 74 of the others admitted before 2018.
- Harvard Law School graduates on the register14,378 living, 86.1% registered.
- Admitted in 20188,750 people admitted in 2018 are on the register, 2,267 of them through the Second 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 David Mattheiss’s standing, contact the Attorney Registration Unit of the NY Office of Court Administration (nycourts.gov/attorneys), or ask the Appellate Division, Second Department, which admitted Michael David Mattheiss in 2018. The register places the office outside New York, so a complaint would go to that department’s grievance committee (22 NYCRR 1240.7(a)(2)).
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).