John Grum, M.D.
NPI 1033144720 · Diagnostic Radiology Physician · Milwaukee, WI
John Grum, M.D. is a Diagnostic Radiology Physician provider in Milwaukee, WI (NPI 1033144720).
Provider details
- NPI number
- 1033144720
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 21699-020 (WI)
Specialties & taxonomies
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
- 2006-07-11
- Last updated
- 2013-01-11
Frequently asked questions
- What is John Grum's NPI number?
- John Grum's National Provider Identifier (NPI) is 1033144720, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Grum's specialty?
- John Grum is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is John Grum located?
- John Grum's practice location on file with NPPES is 945 N 12th St, Milwaukee, WI 53233-1305.
- What is John Grum's phone number?
- The practice phone number listed in the NPPES registry for John Grum is (414) 219-2000.
- Is John Grum's NPI active?
- Yes — John Grum's NPI (1033144720) is active in the NPPES registry as of the last update on 2013-01-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.