James Harley, MD
NPI 1174582738 · Hospitalist Physician · Mchenry, IL
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
James Harley, MD is a Hospitalist Physician provider in Mchenry, IL (NPI 1174582738).
Provider details
- NPI number
- 1174582738
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 036-096836 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
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
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
491 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) |
|---|---|---|
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 380 | $135 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 92 | $176 |
| Initial Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 40 Minutes99221 | 19 | $87 |
Typical Medicare-allowed amounts for these services range $87–$176 (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
Additional practice locations (2)
- 800 W Central RdArlington Heights, IL 60005-2349Phone: (877) 635-9229Fax: (847) 618-3259
- 2222 W Division StSuite 205Chicago, IL 60622-2990Phone: (773) 486-8820Fax: (773) 227-3753
Registry dates
- Enumerated
- 2006-03-22
- Last updated
- 2023-03-01
- Certified
- 2023-03-01
Frequently asked questions
- What is James Harley's NPI number?
- James Harley's National Provider Identifier (NPI) is 1174582738, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Harley's specialty?
- James Harley is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is James Harley located?
- James Harley's practice location on file with NPPES is 4309 W Medical Center Dr Ste A102, Mchenry, IL 60050-8436.
- What is James Harley's phone number?
- The practice phone number listed in the NPPES registry for James Harley is (815) 338-6600.
- Does James Harley accept Medicare?
- James Harley is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is James Harley's NPI active?
- Yes — James Harley's NPI (1174582738) is active in the NPPES registry as of the last update on 2023-03-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.