NPI age
18 years
Enumerated 2007-06-18
● Active
Type 1 · Individual
MR. Douglas James Harrison, MD
Harrison is 1 of 163 pediatrics providers in Houston and 1 of 321 in Texas.
Primary specialty
Pediatrics
Licensed in
TX
1 state
Status
Active
No deactivations on record
Last NPPES update
2017-01-11
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 321 active pediatrics providers in Texas.
NPI age
18 years
≈ at median (17 yr)
State licenses
1 state
27% of peers hold multiple states
Subspecialties
0
50% of peers hold subspecialties
NPI lifetime · 2007 → 2026
2007-06Enumerated in NPPES
2007
2026
Where they practice
Practice location
1515 Holcombe Blvd
Houston, TX 770304009
Mailing address
Po Box 4439
Houston, TX 772104439
Specialties
-
Pediatrics PrimaryA pediatrician trained in the combination of pediatrics, hematology and oncology to recognize and manage pediatric blood disorders and cancerous diseases.
Identifiers
| Type | Value | Notes |
|---|---|---|
| 01 (RI) | MD12410 | LICENSE |
| 05 (TX) | 339956001 | |
| 05 (RI) | 1821293 |
Practice context
Part of a multi-provider practice. 3675 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.