NPI age
19 years
Enumerated 2007-01-10
● Active
Type 1 · Individual
Michael Leopold Grynsztejn
Grynsztejn is 1 of 1291 anesthesiology providers in Houston and 1 of 6023 in Texas.
Primary specialty
Anesthesiology
Licensed in
TX
1 state
Status
Active
No deactivations on record
Last NPPES update
2020-07-14
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 6023 active anesthesiology providers in Texas.
NPI age
19 years
≈ at median (18 yr)
State licenses
1 state
12% of peers hold multiple states
Subspecialties
0
31% of peers hold subspecialties
NPI lifetime · 2007 → 2026
2007-01Enumerated in NPPES
2007
2026
Where they practice
Practice location
1500 Citywest Blvd, Ste. 300
Houston, TX 77042
Mailing address
Po Box 840853
Dallas, TX 752840853
Specialties
-
Anesthesiology PrimaryAn 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 |
|---|---|---|
| 05 (TX) | 126663705 | |
| 01 (TX) | 050041709 | RAILROAD - MEDICARE |
| 01 (LA) | 1385379 | LA - MEDICAID |
| 01 | 84Y625 | TX-BLUE SHIELD |
Practice context
Part of a multi-provider practice. 410 other active providers share this practice address in NPPES.
Recently enumerated nearby: 7 new anesthesiology providers have been added in Houston 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.