Physician Profile
Unclaimed ProfileAbout HORNEFFER
Mark D. Horneffer, MD practices internal medicine in Wauwatosa, WI. Mark is a 1990 graduate of University of Michigan Medical School. Medicare claims data shows Mark provided 554 services to 372 patients.
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
- (414) 464-4460
- Email not available
Practice Locations
10950 W CAPITOL DR
Wauwatosa, WI 53222
Procedures Most Often Billed to Medicare
554 services · 372 patients · 5 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 |
292 |
| Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | Billing code | G0439 |
126 |
| Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more | Office visit | 99215 |
81 |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
41 |
| Telephone medical discussion with physician, 5-10 minutes | Office visit | 99441 |
14 |
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.
Other internal medicines at this location 5
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 1
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 23 related providers in 3 groups
Other internal medicines in Wauwatosa 7
Same specialty, same city.
Trained at University of Michigan Medical School 8
Other providers in the same specialty who trained at the same institution.
Class of 1990 at University of Michigan Medical School 8
Providers who graduated from the same medical school in the same year.
Common questions
What is Dr. Horneffer's specialty?
Dr. Horneffer is an internal medicine in Wauwatosa, WI. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “INTERNAL MEDICINE”.
NPI registry
Where can I find Dr. Horneffer?
Dr. Horneffer is listed at 10950 W CAPITOL DR, Wauwatosa, WI 53222. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Horneffer?
The number on file is (414) 464-4460. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Horneffer?
Dr. Horneffer's National Provider Identifier is 1710928965. 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
What is Dr. Horneffer's medical education?
Dr. Horneffer attended University of Michigan Medical School, graduating in 1990. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Horneffer have?
Dr. Horneffer has 36 years experience. Calculated from a graduation year of 1990, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Horneffer known for?
According to Medicare billing data, Dr. Horneffer 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
Is Dr. Horneffer's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Horneffer. If this is you, claiming it is free.
Guide.md
Is this your profile?
Verify your identity to control how patients — and AI assistants — describe you.
Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.