NPI age
19 years
Enumerated 2006-07-31
● Active
Type 1 · Individual
Mark W Grier, MD
Grier is 1 of 545 pediatrics providers in Austin and 1 of 7055 in Texas.
Primary specialty
Pediatrics
Licensed in
TX
1 state
Status
Active
No deactivations on record
Last NPPES update
2026-03-24
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 7055 active pediatrics providers in Texas.
NPI age
19 years
≈ at median (18 yr)
State licenses
1 state
8% of peers hold multiple states
Subspecialties
0
23% of peers hold subspecialties
NPI lifetime · 2006 → 2026
2006-07Enumerated in NPPES
2006
2026
Where they practice
Practice location
1301 S, Capital Of Texas Hwy, Building A Ste.230
Austin, TX 78746
Mailing address
1301 S, Capital Of Texas Hwy, Building A Ste.230
Austin, TX 78746
Specialties
-
Pediatrics PrimaryA pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment...
Identifiers
| Type | Value | Notes |
|---|---|---|
| 05 (TX) | 179323403 | |
| 05 (TX) | 179323404 | |
| 05 (TX) | 179323405 | |
| 05 (TX) | 179323401 | |
| 05 (TX) | 179323402 |
Practice context
Solo or small practice. No other active providers share this practice address in NPPES.
Recently enumerated nearby: 17 new pediatrics providers have been added in Austin in the last 180 days.
See all →
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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.