John Willis, DO
NPI 1205891207 · Internal Medicine Physician · Mansfield, TX
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Willis, DO is a Internal Medicine Physician provider in Mansfield, TX (NPI 1205891207).
Provider details
- NPI number
- 1205891207
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- J0366 (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
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
721 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 322 | $89 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 267 | $126 |
| Administration of Influenza Virus VaccineG0008 | 52 | $32 |
| Advance Care Planning, First 30 Minutes99497 | 19 | $80 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 19 | $127 |
| Administration of Pneumococcal VaccineG0009 | 17 | $32 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 144 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 449 | 130 |
| Amlodipine Besylate | 444 | 130 |
| Losartan Potassium | 419 | 110 |
| Levothyroxine Sodium | 274 | 75 |
| Metformin Hcl | 229 | 68 |
| Lisinopril | 204 | 53 |
| Gabapentin |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$386 across 19 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 (1)
- 2800 E Broad St Ste 512Mansfield, TX 76063-6417Phone: (817) 473-6867Fax: (817) 453-0954
Registry dates
- Enumerated
- 2006-04-20
- Last updated
- 2022-03-23
- Certified
- 2022-03-23
Frequently asked questions
- What is John Willis's NPI number?
- John Willis's National Provider Identifier (NPI) is 1205891207, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Willis's specialty?
- John Willis is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Willis located?
- John Willis's practice location on file with NPPES is 252 Matlock Rd Ste 130, Mansfield, TX 76063-4295.
- What is John Willis's phone number?
- The practice phone number listed in the NPPES registry for John Willis is (682) 242-8990.
- Does John Willis accept Medicare?
- John Willis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Willis's NPI active?
- Yes — John Willis's NPI (1205891207) is active in the NPPES registry as of the last update on 2022-03-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.