Don Callens, MD
NPI 1528285079 · Family Medicine Physician · Liberty, TX
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Don Callens, MD is a Family Medicine Physician provider in Liberty, TX (NPI 1528285079).
Provider details
- NPI number
- 1528285079
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- M3952 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,781 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 454 | $8 |
| Subsequent Nursing Facility Care With Straightforward Level of Medical Decision Making, Per Day, If Using Time, 20 Minutes Or More99308 | 350 | $71 |
| Urinalysis, Manual Test81002 | 180 | $3 |
| Detection Test By Immunoassay With Direct Visual Observation for Influenza Virus87804 | 170 | $16 |
| Hemoglobin A1c Level83036 | 160 | $10 |
| X-Ray of Chest, 2 Views71046 | 85 | $22 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 203 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 882 | 220 |
| Levothyroxine Sodium | 723 | 180 |
| Pantoprazole Sodium | 534 | 134 |
| Lisinopril | 517 | 143 |
| Gabapentin | 509 | 124 |
| Amlodipine Besylate | 463 | 135 |
| Furosemide | 344 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$42 across 2 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-04-19
- Last updated
- 2009-09-04
Frequently asked questions
- What is Don Callens's NPI number?
- Don Callens's National Provider Identifier (NPI) is 1528285079, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Don Callens's specialty?
- Don Callens is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Don Callens located?
- Don Callens's practice location on file with NPPES is 720 Travis, Liberty, TX 77575-4828.
- What is Don Callens's phone number?
- The practice phone number listed in the NPPES registry for Don Callens is (936) 336-6439.
- Does Don Callens accept Medicare?
- Don Callens is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Don Callens's NPI active?
- Yes — Don Callens's NPI (1528285079) is active in the NPPES registry as of the last update on 2009-09-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.