Donald Westerhausen, MD
NPI 1437491974 · Pulmonary Disease Physician · Mishawaka, IN
Enrolled with Medicare as Practitioner - Pulmonary Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Donald Westerhausen, MD is a Pulmonary Disease Physician provider in Mishawaka, IN (NPI 1437491974).
Provider details
- NPI number
- 1437491974
- Entity type
- Individual
- Primary specialty
- Pulmonary Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 01076759A (IN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
13 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
702 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 128 | $119 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 98 | $154 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 88 | $84 |
| Test to Examine How Well the Lungs Exchange Gases94729 | 64 | $8 |
| Test to Measure Expiratory Airflow and Volume Changes Before and After Medication Administration94060 | 63 | $9 |
| Test to Determine Lung Volumes Using Sensors94726 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 19 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Fluticasone/Umeclidin/Vilanterbrand: Trelegy Ellipta | 158 | 48 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 147 | 44 |
| Budesonide/Glycopyr/Formoterolbrand: Breztri Aerosphere | 62 | 23 |
| Prednisone | 48 | 27 |
| Azithromycin | 26 | 18 |
| Tiotropium Bromidebrand: Spiriva Respimat | 26 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$6,896 across 79 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2013-03-22
- Last updated
- 2023-08-07
- Certified
- 2023-08-07
Frequently asked questions
- What is Donald Westerhausen's NPI number?
- Donald Westerhausen's National Provider Identifier (NPI) is 1437491974, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Donald Westerhausen's specialty?
- Donald Westerhausen is listed in the NPPES registry with a primary specialty of Pulmonary Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Donald Westerhausen located?
- Donald Westerhausen's practice location on file with NPPES is 611 E Douglas Rd Ste 309, Mishawaka, IN 46545-1467.
- What is Donald Westerhausen's phone number?
- The practice phone number listed in the NPPES registry for Donald Westerhausen is (574) 335-6900.
- Does Donald Westerhausen accept Medicare?
- Donald Westerhausen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Donald Westerhausen's NPI active?
- Yes — Donald Westerhausen's NPI (1437491974) is active in the NPPES registry as of the last update on 2023-08-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.