Mark Klaas, M.D.
NPI 1215994298 · Pulmonary Disease Physician · Waukesha, WI
Mark Klaas, M.D. is a Pulmonary Disease Physician provider in Waukesha, WI (NPI 1215994298).
Provider details
- NPI number
- 1215994298
- Entity type
- Individual
- Primary specialty
- Pulmonary Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 31805 (WI)
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 tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-04-26
- Last updated
- 2009-11-20
Frequently asked questions
- What is Mark Klaas's NPI number?
- Mark Klaas's National Provider Identifier (NPI) is 1215994298, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Klaas's specialty?
- Mark Klaas is listed in the NPPES registry with a primary specialty of Pulmonary Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Klaas located?
- Mark Klaas's practice location on file with NPPES is 725 American Ave, Waukesha, WI 53188-5031.
- What is Mark Klaas's phone number?
- The practice phone number listed in the NPPES registry for Mark Klaas is (262) 928-2391.
- Is Mark Klaas's NPI active?
- Yes — Mark Klaas's NPI (1215994298) is active in the NPPES registry as of the last update on 2009-11-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.