NPI age
16 years
Enumerated 2009-11-24
● Active
Type 1 · Individual
Mary Olivia De Leon, F.N.P.
De Leon is 1 of 1 clinical nurse specialist providers in Brownsville and 1 of 46 in Texas.
Primary specialty
Clinical Nurse Specialist
Licensed in
TX
1 state
Status
Active
No deactivations on record
Last NPPES update
2011-10-07
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 46 active clinical nurse specialist providers in Texas.
NPI age
16 years
↑ 5 yr above median (11 yr)
State licenses
1 state
2% of peers hold multiple states
Subspecialties
0
13% of peers hold subspecialties
NPI lifetime · 2009 → 2026
2009-11Enumerated in NPPES
2009
2026
Where they practice
Practice location
4920 N. Expressway,, Alton Gloor Plaza#101
Brownsville, TX 78526
Mailing address
1474 W. Price Rd, Ste 7 Box 536
Brownsville, TX 785208675
Specialties
-
Clinical Nurse Specialist PrimaryDefinition to come...
Identifiers
| Type | Value | Notes |
|---|---|---|
| 05 (TX) | 1336125046 |
Practice context
Solo or small practice. No other active providers share this practice address in NPPES.
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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.