David Warren Blass
On the New York attorney register since 1999 · office in Washington, DC
PlainAttorney’s reading of the public register file, not a court record.
- Registration No.
- 2989820
- Admitted
- 1999 · Second Department
- Status
- Currently registered
- Next registration
- Oct 2027
David Warren Blass is currently registered on the New York attorney register file of Sep 29, 2026. Admitted in 1999 in the Second Department, with an office in Washington, DC; next registration due Oct 2027. The status is the same in all 3 files we hold.
What this status means on the register
On the register, “Currently registered” means David Warren Blass has filed the biennial registration the court system requires; the next one is due in Oct 2027.
- 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
1,307 other attorneys list Simpson Thacher & Bartlett LLP or one of its other names as their employer on the register; 117 of them were admitted before 1999, and 65 of the 1,308 give an office in Washington, DC. The 5 whose admission is closest to 1999, earliest first:
| Attorney | Admitted | Status |
|---|---|---|
| Adrienne Escousse Boan | 1999 | Suspended, delinquent |
| David Michael Cohen | 1999 | Currently registered |
| Bethany Jane Cooper | 1999 | Currently registered |
| Barrie Brant Covit | 1999 | Currently registered |
| Kirsten Lu Ann Davis | 1999 | Currently registered |
All 1,308 registrations that list Simpson Thacher & Bartlett 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
David Warren Blass studied at Columbia Law School. 2,635 of its 18,953 living graduates on the register were admitted in the 1990s, as David Warren Blass was.
- Same law school
- 18,953living graduates; 87.4% registered (current or due), against 87.1% overall
- Office in Washington, DC
- 12,527living registrants (outside New York State)
Of the 12,527 living registrants with an office in Washington, DC, 2,552 were admitted before 1999 and 9,706 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 Simpson Thacher & Bartlett LLP1,308 on the register, 117 of the others admitted before 1999; 65 of the 1,308 give an office in Washington, DC.
- Columbia Law School graduates on the register18,953 living, 87.4% registered; 157 of them list Simpson Thacher & Bartlett LLP.
- New York-admitted attorneys in Washington, DC12,527 living registrants give an office there.
- Admitted in 19997,628 people admitted in 1999 are on the register, 2,434 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 David Warren Blass’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 David Warren Blass in 1999. 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).