NPI age
17 years
Enumerated 2008-06-24
● Active
Type 1 · Individual
Michaela Onstad Grinsfelder, MD
Grinsfelder is 1 of 739 obstetrics & gynecology providers in Houston and 1 of 4633 in Texas.
Primary specialty
Obstetrics & Gynecology
Licensed in
TX
1 state
Status
Active
No deactivations on record
Last NPPES update
2023-04-21
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 4633 active obstetrics & gynecology providers in Texas.
NPI age
17 years
≈ at median (18 yr)
State licenses
1 state
7% of peers hold multiple states
Subspecialties
0
21% of peers hold subspecialties
NPI lifetime · 2008 → 2026
2008-06Enumerated in NPPES
2008
2026
Where they practice
Practice location
1515 Holcombe Blvd
Houston, TX 770304000
Mailing address
P O Box 4439
Houston, TX 772104439
Specialties
-
Obstetrics & Gynecology PrimaryAn obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other...
Identifiers
| Type | Value | Notes |
|---|---|---|
| 05 (TX) | 346621101 |
Practice context
Part of a multi-provider practice. 3675 other active providers share this practice address in NPPES.
Recently enumerated nearby: 3 new obstetrics & gynecology 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.