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Gregory Buck, MD
NPI 1417989641 · Internal Medicine Physician · Wauwatosa, WI
Gregory Buck, MD is a Internal Medicine Physician provider in Wauwatosa, WI (NPI 1417989641).
Provider details
- NPI number
- 1417989641
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 25211 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(91/100 index)
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
3289 N Mayfair Rd
Wauwatosa, WI 53222-3203
Phone: (414) 771-7900
Fax: (414) 607-6336
Street-level locationGet directions
Mailing address
3003 W Good Hope Road
Milwaukee, WI 53209
Registry dates
- Enumerated
- 2006-07-07
- Last updated
- 2010-09-23
Frequently asked questions
- What is Gregory Buck's NPI number?
- Gregory Buck's National Provider Identifier (NPI) is 1417989641, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Buck's specialty?
- Gregory Buck is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Buck located?
- Gregory Buck's practice location on file with NPPES is 3289 N Mayfair Rd, Wauwatosa, WI 53222-3203.
- What is Gregory Buck's phone number?
- The practice phone number listed in the NPPES registry for Gregory Buck is (414) 771-7900.
- Is Gregory Buck's NPI active?
- Yes — Gregory Buck's NPI (1417989641) is active in the NPPES registry as of the last update on 2010-09-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.