New York attorney record · Judicial Dept 2
Mark Matthew Billion
Columbia alumna, admitted to the New York bar in 2007, registered office in Rehoboth Beach, DE. This established record's status, address, and registration history come straight from the NY Office of Court Administration.
- 2007
- Admitted
- 19
- Years in bar
- 4508420
- NY reg #
The record in one line
Mark Matthew Billion has held an active New York bar license for 19 years - admitted in 2007, longer-tenured than 38% of the state's currently-active attorneys.
- 19 yrs
- in active practice since admission
- Active
- current bar status: "Currently registered"
- #5 of 5
- by tenure in Rehoboth Beach office peers
- Law school
- Columbia
Data updated September 2026
What this profile tells you
Bar status & tenure
Mark Matthew Billion carries New York bar registration 4508420, an established, active practitioner in good standing. Registration is recorded within Judicial Department 2, the appellate division overseeing this attorney's home district.
Practice context & education
The attorney's registration lists a business address in Rehoboth Beach, DE, ZIP 19971. Educational background: COLUMBIA.
State context & due diligence
With an established practice on record, Mark Matthew Billion remains inside the New York bar's active cohort - see below for how that share of the register compares.
Experience vs. the active New York bar
Mark Matthew Billion was admitted in 2007, giving 19 years on the New York register.
19 years on the New York bar
Years since admission, all currently-active NY attorneys
19 Top 62% higher than 38% of 290,787 active NY attorneys
Each bar is a band; taller bars hold more active NY attorneys. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source NY Office of Court Administration, Attorney Registration · September 2026
Tenure among Rehoboth Beach, DE office peers
Rehoboth Beach, DE carries only 5 NY-registered attorneys with an admission year on file; Mark Matthew Billion is #5 by tenure in that small local set.
- Local rank
- #5
- City cohort
- 5
- Local percentile
- 80th
- Admitted
- 2007
Nearest tenure peers in Rehoboth Beach
- Sander Michael Bieber admitted 2012 · 14 yr
- Peter Keith Schaeffer Jr. admitted 1998 · 28 yr
- Brian Michael Rosen admitted 1995 · 31 yr
- Edward Hawkins Sisson admitted 1992 · 34 yr
How local rank is computed
Rank uses years since NY-bar admission among non-deceased registry rows that list the same office city and state, a local placement, not a statewide claim. Source: NY Office of Court Administration Attorney Registration · as of September 2026. Derived local rank, not published upstream.
How Mark compares to fellow Columbia alumni
Among the 2,448 Columbia graduates in the New York register, Mark Matthew Billion is longer-tenured than 6%.
19 years vs. Columbia alumni
Years since admission - 2,448 NY-registered alumni of this school
19 Top 94% higher than 6% of 2,448 fellow alumni
Each bar is a band; taller bars hold more fellow alumni. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source NY Office of Court Administration, Attorney Registration · September 2026
The 2007 admission class today
Of the 8,913 attorneys admitted to the New York bar in 2007, 87.4% are still "Currently registered" today, above the statewide average across all admission years.
Professional Details
- Status
- Currently registered
- Registration Number
- 4508420
- Year Admitted
- 2007 (19 yrs · senior)
- Judicial Department
- 2
- Next Registration
- Jan 2027
Location & Contact
- City
- Rehoboth Beach, DE
- ZIP Code
- 19971
- Phone
- (302) 428-9400
Education
COLUMBIA
Status Distribution Across the New York Bar
Mark Matthew Billion's current status, "Currently registered", places this attorney in the 67.2% of the 432,625-attorney New York register currently marked active.
Full statewide breakdown & source note
Source: NY Office of Court Administration, Attorney Registrations. Status counts reflect the latest reporting cycle. Bar status confirms registration only; it does not imply competence, specialty fit, or freedom from complaints.
Near-tenure Columbia alumni
Fellow alumni on the NY register whose admission year is closest to 2007 .
Same admission year (2007), other cities
NY-registered attorneys admitted in 2007 whose listed office city differs from Rehoboth Beach, a vintage cohort, not a neighborhood list.
Nationwide attorneys with similar admission year or city registry density
Out-of-state NY bar peers for Mark Matthew Billion with the closest admission year to 2007. Distinct from same-firm, fellow-alumni, and same-year other-city strips above.
Counts come from the NY State Office of Court Administration registration extract; peers are not a competence or practice-area ranking.
Verify This Attorney
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Compare attorneys →Before you rely on this record
Mark Matthew Billion's "Currently registered" listing confirms bar standing only, it is a registration fact to verify, not a verdict on quality or competence.
Frequently Asked Questions
Where is Mark Billion licensed?
Mark Billion is licensed to practice law in New York.
When was Mark Matthew Billion admitted to the bar?
Mark Matthew Billion was admitted to the bar in 2007.
Where did Mark Matthew Billion go to law school?
Mark Matthew Billion attended COLUMBIA.
Is Mark Matthew Billion in good standing?
Yes, Mark Matthew Billion holds active bar status ("Currently registered").
Cite this page & disclosure
Sourced from the NY Office of Court Administration, informational only, not legal advice. Full disclosure.
Read our methodology - how this data is sourced, computed, and verified.