NPI age
19 years
Enumerated 2006-09-20
● Active
Type 1 · Individual
William B McIlvaine, MD
McIlvaine is 1 of 4 anesthesiology providers in El Paso and 1 of 172 in Texas.
Primary specialty
Anesthesiology
Plus 1 subspecialty
Licensed in
TX, CA
2 states
Status
Active
No deactivations on record
Last NPPES update
2014-02-20
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 172 active anesthesiology providers in Texas.
NPI age
19 years
↑ 2 yr above median (17 yr)
State licenses
2 states
Top 69% — 30% of peers are multi-state
Subspecialties
1
In the 67% of peers with subspecialties
NPI lifetime · 2006 → 2026
2006-09Enumerated in NPPES
2006
2026
Where they practice
Practice location
4800 Alberta Ave
El Paso, TX 799052709
Mailing address
4800 Alberta Ave
El Paso, TX 799052709
Specialties
-
Anesthesiology PrimaryAn anesthesiologist who has had additional skill and experience in and is primarily concerned with the anesthesia, sedation, and pain management needs of infants and children. A pediatric anesthesiologist generally provides services...
-
AnesthesiologyAn anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk...
Identifiers
| Type | Value | Notes |
|---|---|---|
| 01 (CA) | 00G437530 F91 | CAL OPTIMA |
| 05 (CA) | 00G437530 |
Multi-state credentialing: Licensed in 2 states. Useful context for credentialers building cross-state provider networks.
Practice context
Part of a multi-provider practice. 185 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.