NPI age
13 years
Enumerated 2013-02-01
● Active
Type 1 · Individual
DR. Margaret Norin O'Sullivan, DMD
O'Sullivan is 1 of 1274 dentist providers in Houston and 1 of 9237 in Texas.
Primary specialty
Dentist
Licensed in
TX
1 state
Status
Active
No deactivations on record
Last NPPES update
2013-02-01
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 9237 active dentist providers in Texas.
NPI age
13 years
≈ at median (12 yr)
State licenses
1 state
7% of peers hold multiple states
Subspecialties
0
16% of peers hold subspecialties
NPI lifetime · 2013 → 2026
2013-02Enumerated in NPPES
2013
2026
Where they practice
Practice location
9742 Katy Fwy, Ste 500
Houston, TX 770556218
Mailing address
2800 Kirby Dr Apt A732
Houston, TX 770981476
Specialties
-
Dentist PrimaryA dentist is a person qualified by a doctorate in dental surgery (D.D.S.) or dental medicine (D.M.D.), licensed by the state to practice dentistry, and practicing within the scope of that license. There is no difference between the two...
Practice context
Part of a multi-provider practice. 3 other active providers share this practice address in NPPES.
Recently enumerated nearby: 7 new dentist providers have been added in Houston in the last 180 days.
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- Confirm the NPI on NPPES.The CMS registry is the system of record. Open NPPES →
- Check the state license is currently active.State licensing boards publish current status; NPPES does not.
- Confirm payer enrollment if billing.NPI presence does not guarantee active enrollment with Medicare, Medicaid, or commercial payers.