William Grubbs, MD
NPI 1568533644 · Internal Medicine Physician · Naples, FL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Grubbs, MD is a Internal Medicine Physician provider in Naples, FL (NPI 1568533644).
Provider details
- NPI number
- 1568533644
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- ME0055721 (FL)
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
- 2006-11-13
- Last updated
- 2007-07-08
Frequently asked questions
- What is William Grubbs's NPI number?
- William Grubbs's National Provider Identifier (NPI) is 1568533644, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Grubbs's specialty?
- William Grubbs is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Grubbs located?
- William Grubbs's practice location on file with NPPES is 90 Cypress Way E Ste 40, Naples, FL 34110-9275.
- What is William Grubbs's phone number?
- The practice phone number listed in the NPPES registry for William Grubbs is (239) 591-2141.
- Does William Grubbs accept Medicare?
- William Grubbs is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Grubbs's NPI active?
- Yes — William Grubbs's NPI (1568533644) 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.