Quick answers
- Does James M. Lehman accept Medicare assignment?
- Yes. Medicare's clinician data says James M. Lehman 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 James M. Lehman see?
- In 2024, CMS data shows 639 Original Medicare patients and 816 services for James M. Lehman. This counts Original Medicare only and measures volume, not quality.
- What is James M. Lehman's NPI number?
- 1578571766. 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 James M. Lehman, 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 | 639 |
|---|---|
| Services billed to Medicare | 816 |
| Different services or procedures | 28 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)416 services
- Emergency department visit with high level of medical decision making (99285)173 services
- Emergency department visit with moderate level of medical decision making (99284)144 services
- Emergency department visit with low level of medical decision making (99283)25 services
- Critical care, first 30-74 minutes (99291)12 services
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 pressure75%
- High cholesterol75%
- Arthritis56%
- Diabetes41%
- Ischemic heart disease41%
- Chronic kidney disease41%
Hospitals where James M. Lehman works
Medicare's Facility Affiliation Data lists James M. Lehman 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.
- Stormont Vail Health Flint Hills, LLCJunction City, KS · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 170074
- Stormont Vail HospitalTopeka, KS · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 170086
Practice locations
Addresses where James M. Lehman is enrolled with Medicare (CMS data updated October 2, 2026).
- 1102 Saint Marys RdJunction City, KS 66441 (785) 762‑2585
- 1823 College AveManhattan, KS 66502 (785) 354‑9591
Group practices
Medicare enrollment lists James M. Lehman as a member of these groups (CMS data updated October 2, 2026).
- Cotton-O'neil Clinic Revocable Trust666 clinicians in the group
- Stormont Vail Health Flint Hills LLC48 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Junction City
Clinicians with the same Medicare primary specialty in Junction City, KS — not a recommendation.
Other clinicians in Cotton-O'neil Clinic Revocable Trust
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Kansas School Of Med (kc/wich/sal) |
| Graduation year | 2003 (23 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1578571766 |
| 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