William Sadlack, M.D.
NPI 1104819168 · Orthopaedic Surgery Physician · Bethesda, MD
William Sadlack, M.D. is a Orthopaedic Surgery Physician provider in Bethesda, MD (NPI 1104819168).
Provider details
- NPI number
- 1104819168
- Entity type
- Individual
- Primary specialty
- Orthopaedic Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- D0019207 (MD)
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
- 2005-08-25
- Last updated
- 2013-05-09
Frequently asked questions
- What is William Sadlack's NPI number?
- William Sadlack's National Provider Identifier (NPI) is 1104819168, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Sadlack's specialty?
- William Sadlack is listed in the NPPES registry with a primary specialty of Orthopaedic Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is William Sadlack located?
- William Sadlack's practice location on file with NPPES is 6420 Rockledge Dr, Bethesda, MD 20817-7837.
- What is William Sadlack's phone number?
- The practice phone number listed in the NPPES registry for William Sadlack is (301) 530-3220.
- Is William Sadlack's NPI active?
- Yes — William Sadlack's NPI (1104819168) is active in the NPPES registry as of the last update on 2013-05-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.