Quick answers
- Does William L. Hall Ii accept Medicare assignment?
- Medicare's clinician data says William L. Hall Ii may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
- How many Medicare patients does William L. Hall Ii see?
- In 2024, CMS data shows 79 Original Medicare patients and 427 services for William L. Hall Ii. This counts Original Medicare only and measures volume, not quality.
- What is William L. Hall Ii's NPI number?
- 1588613301. 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 William L. Hall Ii, 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 | 79 |
|---|---|
| Services billed to Medicare | 427 |
| Different services or procedures | 84 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)46 services
- Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count (85025)28 services
- Infusion, normal saline solution, sterile (500 ml = 1 unit) (J7040)25 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)23 services
- Blood test, basic group of blood chemicals (calcium, total) (80048)19 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 cholesterol68%
- High blood pressure47%
- Arthritis42%
- Depression25%
- Ischemic heart disease20%
- Anxiety19%
Practice locations
Addresses where William L. Hall Ii is enrolled with Medicare (CMS data updated October 2, 2026).
- 2600 Horizon Dr SEGrand Rapids, MI 49546
- 354 Echo Canyon CtGrand Junction, CO 81507
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Grand Rapids
Clinicians with the same Medicare primary specialty in Grand Rapids, MI — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Colorado School Of Medicine, Denver |
| Graduation year | 1999 (27 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1588613301 |
| 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
- 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