Physician Profile
Unclaimed ProfileAbout MATTHAEUS
Based in Milwaukee, WI, William G Matthaeus, MD is listed in the NPI registry under hematology/oncology. William graduated from Medical College of Wisconsin in 1983. William is also listed as specializing in hospice & palliative medicine and hematology & oncology. According to Medicare claims data, William cared for 315 Medicare patients across 592 services.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (262) 857-5750
- Email not available
Practice Locations
1055 N MAYFAIR RD
Milwaukee, WI 53226
Procedures Most Often Billed to Medicare
592 services · 315 patients · 7 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
247 |
| Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more | Office visit | 99215 |
149 |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
120 |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
28 |
| Telephone medical discussion with physician, 11-20 minutes | Office visit | 99442 |
21 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
15 |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
12 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Also at this address 1
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other hematology/oncology specialists in Milwaukee 8
Same specialty, same city.
Trained at Medical College of Wisconsin 7
Other providers in the same specialty who trained at the same institution.
More connections — 8 related providers in 1 group
Class of 1983 at Medical College of Wisconsin 8
Providers who graduated from the same medical school in the same year.
Common questions
What kind of doctor is Dr. Matthaeus?
Dr. Matthaeus is a hematology/oncology in Milwaukee, WI. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “HEMATOLOGY/ONCOLOGY”.
NPI registry
What is Dr. Matthaeus's address?
Dr. Matthaeus is listed at 1055 N MAYFAIR RD, Milwaukee, WI 53226. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Matthaeus?
The number on file is (262) 857-5750. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Matthaeus's NPI number?
Dr. Matthaeus's National Provider Identifier is 1326039074. 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
Where did Dr. Matthaeus train?
Dr. Matthaeus attended Medical College of Wisconsin, graduating in 1983. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Matthaeus been practicing?
Dr. Matthaeus has 43 years experience. Calculated from a graduation year of 1983, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Matthaeus perform?
According to Medicare billing data, Dr. Matthaeus 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
Has Dr. Matthaeus confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Matthaeus. If this is you, claiming it is free.
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Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.