John Williamson, M.D.
NPI 1922069186 · Pain Medicine Physician · Huntsville, TX
Enrolled with Medicare as Practitioner - Pain Management · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Provider details
- NPI number
- 1922069186
- Entity type
- Individual
- Primary specialty
- Pain Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- J2414 (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
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,972 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) |
|---|---|---|
| Chronic Pain Management and Treatment, Monthly Bundle Including, Diagnosis; Assessment and Monitoring; Administration of a Validated Pain Rating Scale Or Tool; the Development, Implementation, Revision, And/Or Maintenance of a Person-Centered Care Plan ThaG3002 | 463 | $75 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 410 | $117 |
| Testing for Presence of Drug, By Chemistry Analyzers80307 | 196 | $59 |
| Drug Test(s), Definitive, Utilizing (1) Drug Identification Methods Able to Identify Individual Drugs and Distinguish Between Structural Isomers (but Not Necessarily Stereoisomers), Including, But Not Limited to Gc/Ms (any Type, Single Or Tandem) and Lc/MsG0482 | 196 | $190 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 140 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 29 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 677 | 112 |
| Gabapentin | 527 | 124 |
| Tramadol Hcl | 178 | 52 |
| Oxycodone Hcl/Acetaminophenbrand: Oxycodone-Acetaminophen | 171 | 34 |
| Pregabalin | 130 | 30 |
| Tizanidine Hcl | 118 | 31 |
| Baclofen |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$416 across 14 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
Additional practice locations (2)
- 1901 Medi ParkSuite 2002Amarillo, TX 79106-2110Phone: (806) 353-4699Fax: (806) 353-4551
- 1020 Riverwood Ct Ste 200Conroe, TX 77304-2974Phone: (936) 756-3444Fax: (936) 756-3452
Registry dates
- Enumerated
- 2006-03-29
- Last updated
- 2019-12-11
- Certified
- 2019-12-11
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.