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Marcus Williams, M.D.
NPI 1619057734 · Internal Medicine Physician · Exton, PA
Marcus Williams, M.D. is a Internal Medicine Physician provider in Exton, PA (NPI 1619057734).
Provider details
- NPI number
- 1619057734
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD428872 (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(90/100 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
80 W Welsh Pool Rd
Suite 101s
Exton, PA 19341-1233
Phone: (484) 483-2745
Fax: (484) 879-4098
Street-level locationGet directions
Mailing address
80 W Welsh Pool Rd
Exton, PA 19341-1233
Registry dates
- Enumerated
- 2006-10-16
- Last updated
- 2014-02-04
Frequently asked questions
- What is Marcus Williams's NPI number?
- Marcus Williams's National Provider Identifier (NPI) is 1619057734, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marcus Williams's specialty?
- Marcus Williams is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Marcus Williams located?
- Marcus Williams's practice location on file with NPPES is 80 W Welsh Pool Rd, Exton, PA 19341-1233.
- What is Marcus Williams's phone number?
- The practice phone number listed in the NPPES registry for Marcus Williams is (484) 483-2745.
- Is Marcus Williams's NPI active?
- Yes — Marcus Williams's NPI (1619057734) is active in the NPPES registry as of the last update on 2014-02-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.