Provider Profile
Margaret Walker is a hospitalist practicing in Madison, WI. Margaret trained at Northwestern University Feinberg Medical School, graduating in 2020. Margaret is also listed as specializing in hematology & oncology. Medicare claims data shows Margaret provided 531 services to 299 patients.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Source: NPPES NPI Registry
600 HIGHLAND AVE
Madison, WI 53792
Within Hospital Medicine generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Brain & nerves
Breathing & lungs
Digestive health
General medical
Heart & circulation
Hormones & diabetes
Infections
Kidney & urinary
Access & tubes
Breathing support
Diagnostic procedures
Draining fluids
Hospital services
Medication & fluids
531 services · 299 patients · 5 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
316 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | Office visit | 99233 |
73 |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | Office visit | 99223 |
54 |
| Hospital discharge day management, more than 30 minutes | Office visit | 99239 |
52 |
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | Office visit | 99222 |
36 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Dr. Walker is a hospitalist in Madison, WI. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “HOSPITALIST”.
NPI registry
Dr. Walker is listed at 600 HIGHLAND AVE, Madison, WI 53792. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
The number on file is (608) 263-6400. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
Dr. Walker's National Provider Identifier is 1396291233. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Dr. Walker attended Northwestern University Feinberg Medical School, graduating in 2020. This comes from the CMS National Downloadable File.
CMS public data
Dr. Walker has 6 years experience. Calculated from a graduation year of 2020, reported in the CMS National Downloadable File.
CMS public data
According to Medicare billing data, Dr. Walker the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Walker. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.