William Long, MD
NPI 1639183304 · Internal Medicine Physician · Philadelphia, PA
William Long, MD is a Internal Medicine Physician provider in Philadelphia, PA (NPI 1639183304).
Provider details
- NPI number
- 1639183304
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MD009893E (PA)
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
- 2006-07-28
- Last updated
- 2011-02-28
Frequently asked questions
- What is William Long's NPI number?
- William Long's National Provider Identifier (NPI) is 1639183304, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Long's specialty?
- William Long is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Long located?
- William Long's practice location on file with NPPES is 3400 Spruce St, Philadelphia, PA 19104-4206.
- What is William Long's phone number?
- The practice phone number listed in the NPPES registry for William Long is (215) 349-8222.
- Is William Long's NPI active?
- Yes — William Long's NPI (1639183304) is active in the NPPES registry as of the last update on 2011-02-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.