William Byrne, M.D.
NPI 1841356953 · Internal Medicine Physician · Frederick, MD
William Byrne, M.D. is a Internal Medicine Physician provider in Frederick, MD (NPI 1841356953).
Provider details
- NPI number
- 1841356953
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- D0057818 (MD)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
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
- 2007-01-01
- Last updated
- 2007-07-08
Frequently asked questions
- What is William Byrne's NPI number?
- William Byrne's National Provider Identifier (NPI) is 1841356953, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Byrne's specialty?
- William Byrne is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Byrne located?
- William Byrne's practice location on file with NPPES is 19 W 3rd St, Frederick, MD 21701-5330.
- What is William Byrne's phone number?
- The practice phone number listed in the NPPES registry for William Byrne is (301) 620-0280.
- Is William Byrne's NPI active?
- Yes — William Byrne's NPI (1841356953) 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.