Walter Groff, M.D.
NPI 1437116423 · Colon & Rectal Surgery Physician · Summit, NJ
Enrolled with Medicare as Practitioner - Colorectal Surgery (proctology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Walter Groff, M.D. is a Colon & Rectal Surgery Physician provider in Summit, NJ (NPI 1437116423).
Provider details
- NPI number
- 1437116423
- Entity type
- Individual
- Primary specialty
- Colon & Rectal Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 25MA03600900 (NJ)
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
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
- 2007-07-08
Frequently asked questions
- What is Walter Groff's NPI number?
- Walter Groff's National Provider Identifier (NPI) is 1437116423, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Walter Groff's specialty?
- Walter Groff is listed in the NPPES registry with a primary specialty of Colon & Rectal Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Walter Groff located?
- Walter Groff's practice location on file with NPPES is 33 Overlook Rd, Summit, NJ 07901-3570.
- What is Walter Groff's phone number?
- The practice phone number listed in the NPPES registry for Walter Groff is (909) 598-0220.
- Does Walter Groff accept Medicare?
- Walter Groff is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Walter Groff's NPI active?
- Yes — Walter Groff's NPI (1437116423) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.