Quick answers
- Does Juan A. Cornejo accept Medicare assignment?
- Yes. Medicare's clinician data says Juan A. Cornejo accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Juan A. Cornejo see?
- In 2024, CMS data shows 31 Original Medicare patients and 55 services for Juan A. Cornejo. This counts Original Medicare only and measures volume, not quality.
- What is Juan A. Cornejo's NPI number?
- 1164751525. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Juan A. Cornejo, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 31 |
|---|---|
| Services billed to Medicare | 55 |
| Different services or procedures | 15 |
| Participating Medicare provider | Yes |
| Average age of these patients | 70 |
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure74%
- High cholesterol71%
- Arthritis48%
Hospitals where Juan A. Cornejo works
Medicare's Facility Affiliation Data lists Juan A. Cornejo at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Duncan Regional Hospital, IncDuncan, OK · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 370023
- Grady Memorial HospitalChickasha, OK · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 370054
- Jefferson County HospitalWaurika, OK · Critical Access Hospital · Emergency services: listed by Medicare · CCN 371311
Practice locations
Addresses where Juan A. Cornejo is enrolled with Medicare (CMS data updated October 2, 2026).
- 1415 N Whisenant DrDuncan, OK 73533 (580) 252‑5300
- 2100 S Iowa AveChickasha, OK 73018 (405) 224‑2229
- 2621 N Whisenant DrDuncan, OK 73533 (580) 252‑5300
- 8148 State Hwy 17Elgin, OK 73538 (580) 454‑2273
Group practices
Medicare enrollment lists Juan A. Cornejo as a member of these groups (CMS data updated October 2, 2026).
- Duncan Regional Hospital, Inc68 clinicians in the group
- Solutions Practice Management21 clinicians in the group
Specialties
- Obstetrics/Gynecologyprimary
Other OB-GYNs in Duncan
Clinicians with the same Medicare primary specialty in Duncan, OK — not a recommendation.
Other clinicians in Duncan Regional Hospital, Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Medical University Of South Carolina College Of Medicine |
| Graduation year | 2006 (20 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1164751525 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians