Nicholas Haun, M.D.
NPI 1215225446 · Hospitalist Physician · Madison, WI
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nicholas Haun, M.D. is a Hospitalist Physician provider in Madison, WI (NPI 1215225446).
Provider details
- NPI number
- 1215225446
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
14 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
476 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 326 | $73 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 46 | $106 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 42 | $109 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 31 | $161 |
| Prolonged Hospital Inpatient Or Observation Care Evaluation and Management Service(s) Beyond the Total Time for the Primary Service (when the Primary Service Has Been Selected Using Time on the Date of the Primary Service); Each Additional 15 Minutes By ThG0316 | 16 | $28 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes |
Practice location
Mailing address
Registry dates
- Enumerated
- 2011-07-21
- Last updated
- 2021-01-21
- Certified
- 2021-01-21
Frequently asked questions
- What is Nicholas Haun's NPI number?
- Nicholas Haun's National Provider Identifier (NPI) is 1215225446, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nicholas Haun's specialty?
- Nicholas Haun is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Nicholas Haun located?
- Nicholas Haun's practice location on file with NPPES is Uw Hospital and Clinics, Madison, WI 53792-0001.
- What is Nicholas Haun's phone number?
- The practice phone number listed in the NPPES registry for Nicholas Haun is (608) 263-6400.
- Does Nicholas Haun accept Medicare?
- Nicholas Haun is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nicholas Haun's NPI active?
- Yes — Nicholas Haun's NPI (1215225446) is active in the NPPES registry as of the last update on 2021-01-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.