Gregg Clifford, MD
NPI 1588639975 · Internal Medicine Physician · Norfolk, VA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregg Clifford, MD is a Internal Medicine Physician provider in Norfolk, VA (NPI 1588639975).
Provider details
- NPI number
- 1588639975
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 0101037676 (VA)
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
- 2006-02-21
- Last updated
- 2012-01-09
Frequently asked questions
- What is Gregg Clifford's NPI number?
- Gregg Clifford's National Provider Identifier (NPI) is 1588639975, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregg Clifford's specialty?
- Gregg Clifford is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gregg Clifford located?
- Gregg Clifford's practice location on file with NPPES is 301 Riverview Ave, Norfolk, VA 23510-1065.
- What is Gregg Clifford's phone number?
- The practice phone number listed in the NPPES registry for Gregg Clifford is (757) 252-9300.
- Does Gregg Clifford accept Medicare?
- Gregg Clifford is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregg Clifford's NPI active?
- Yes — Gregg Clifford's NPI (1588639975) is active in the NPPES registry as of the last update on 2012-01-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.