Mark Decker, MD
NPI 1235244484 · Preventive Medicine/Occupational Environmental Medicine Physician · Milwaukee, WI
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Decker, MD is a Preventive Medicine/Occupational Environmental Medicine Physician provider in Milwaukee, WI (NPI 1235244484).
Provider details
- NPI number
- 1235244484
- Entity type
- Individual
- Primary specialty
- Preventive Medicine/Occupational Environmental Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 26951 (WI)
Specialties & taxonomies
- Preventive Medicine/Occupational Environmental Medicine PhysicianPrimary2083P0500XLicense 26951-020 (WI)
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
19 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
- 2006-08-20
- Last updated
- 2023-03-07
Frequently asked questions
- What is Mark Decker's NPI number?
- Mark Decker's National Provider Identifier (NPI) is 1235244484, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Decker's specialty?
- Mark Decker is listed in the NPPES registry with a primary specialty of Preventive Medicine/Occupational Environmental Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Decker located?
- Mark Decker's practice location on file with NPPES is 215 North 35th Street, Milwaukee, WI 53208-4106.
- What is Mark Decker's phone number?
- The practice phone number listed in the NPPES registry for Mark Decker is (414) 931-7600.
- Does Mark Decker accept Medicare?
- Mark Decker is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Decker's NPI active?
- Yes — Mark Decker's NPI (1235244484) is active in the NPPES registry as of the last update on 2023-03-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.