NPI age
19 years
Enumerated 2007-04-19
● Active
Type 1 · Individual
Don Shannon Callens, MD
Callens is 1 of 9 family medicine providers in Liberty and 1 of 15966 in Texas.
Primary specialty
Family Medicine
Licensed in
TX
1 state
Status
Active
No deactivations on record
Last NPPES update
2009-09-04
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 15966 active family medicine providers in Texas.
NPI age
19 years
↑ 2 yr above median (17 yr)
State licenses
1 state
8% of peers hold multiple states
Subspecialties
0
26% of peers hold subspecialties
NPI lifetime · 2007 → 2026
2007-04Enumerated in NPPES
2007
2026
Where they practice
Practice location
720 Travis
Liberty, TX 775754828
Mailing address
720 Travis
Liberty, TX 775754828
Specialties
-
Family Medicine PrimaryFamily Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of...
Identifiers
| Type | Value | Notes |
|---|---|---|
| 01 (TX) | 11818883 | CAQH |
| 01 (TX) | 8F0993 | BC/BS |
| 05 (TX) | 202747601 | |
| 01 (TX) | 8AW040 | BC/BS |
| 01 (TX) | M39952 | LICENSE |
Practice context
Solo or small practice. No other active providers share this practice address in NPPES.
Recently enumerated nearby: 1 new family medicine provider has been added in Liberty 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.