John Williamson, PA
NPI 1366448623 · Physician Assistant · Baton Rouge, LA
John Williamson, PA is a Physician Assistant provider in Baton Rouge, LA (NPI 1366448623).
Provider details
- NPI number
- 1366448623
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA
- Sex
- Male
- Sole proprietor
- No
- License
- PAA10380RX (LA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
20 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 20 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 752 | 183 |
| Brimonidine Tartrate/Timololbrand: Combigan | 158 | 46 |
| Azelastine Hcl | 147 | 57 |
| Bimatoprostbrand: Lumigan | 125 | 38 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 113 | 28 |
| Brimonidine Tartrate/Timololbrand: Brimonidine Tartrate-Timolol | 70 | 21 |
| Brimonidine Tartrate | 59 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$329 across 5 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
- 2005-06-22
- Last updated
- 2008-08-26
Frequently asked questions
- What is John Williamson's NPI number?
- John Williamson's National Provider Identifier (NPI) is 1366448623, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Williamson's specialty?
- John Williamson is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is John Williamson located?
- John Williamson's practice location on file with NPPES is 550 Connells Park Ln, Baton Rouge, LA 70806-6539.
- What is John Williamson's phone number?
- The practice phone number listed in the NPPES registry for John Williamson is (225) 924-2020.
- Is John Williamson's NPI active?
- Yes — John Williamson's NPI (1366448623) is active in the NPPES registry as of the last update on 2008-08-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.