Gary Tennison, DO
NPI 1518946813 · Family Medicine Physician · Robinson, IL
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gary Tennison, DO is a Family Medicine Physician provider in Robinson, IL (NPI 1518946813).
Provider details
- NPI number
- 1518946813
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 036099492 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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 · 211 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 799 | 130 |
| Amlodipine Besylate | 794 | 125 |
| Lisinopril | 606 | 101 |
| Levothyroxine Sodium | 593 | 83 |
| Hydrochlorothiazide | 572 | 83 |
| Losartan Potassium | 562 | 84 |
| Omeprazole |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$197 across 12 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
- 2006-01-13
- Last updated
- 2007-07-08
Frequently asked questions
- What is Gary Tennison's NPI number?
- Gary Tennison's National Provider Identifier (NPI) is 1518946813, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gary Tennison's specialty?
- Gary Tennison is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gary Tennison located?
- Gary Tennison's practice location on file with NPPES is 1101 N Allen St, Robinson, IL 62454-1168.
- What is Gary Tennison's phone number?
- The practice phone number listed in the NPPES registry for Gary Tennison is (618) 544-3125.
- Does Gary Tennison accept Medicare?
- Gary Tennison is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gary Tennison's NPI active?
- Yes — Gary Tennison's NPI (1518946813) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.