James Willey, M.D.
NPI 1134579774 · Hospitalist Physician · Iowa City, IA
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
James Willey, M.D. is a Hospitalist Physician provider in Iowa City, IA (NPI 1134579774).
Provider details
- NPI number
- 1134579774
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD-46364 (IA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
10 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
161 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 67 | $112 |
| Prolonged Hospital Inpatient Or Observation Care Evaluation and Management Service(s) Beyond the Total Time for the Primary Service (when the Primary Service Has Been Selected Using Time on the Date of the Primary Service); Each Additional 15 Minutes By ThG0316 | 64 | $28 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 19 | $109 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 11 | $71 |
Typical Medicare-allowed amounts for these services range $28–$112 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Registry dates
- Enumerated
- 2016-06-14
- Last updated
- 2025-03-05
- Certified
- 2025-03-05
Frequently asked questions
- What is James Willey's NPI number?
- James Willey's National Provider Identifier (NPI) is 1134579774, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Willey's specialty?
- James Willey is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is James Willey located?
- James Willey's practice location on file with NPPES is 200 Hawkins Dr, Iowa City, IA 52242-1009.
- What is James Willey's phone number?
- The practice phone number listed in the NPPES registry for James Willey is (319) 356-4019.
- Does James Willey accept Medicare?
- James Willey is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is James Willey's NPI active?
- Yes — James Willey's NPI (1134579774) is active in the NPPES registry as of the last update on 2025-03-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.