William J. Sadlack, M.D.
Orthopaedic Surgery Physician · Bethesda, MD
William J. Sadlack, M.D. is an orthopaedic surgery physician with a practice address in Bethesda, Maryland, and NPI 1104819168, issued on Aug 25, 2005. Check the license (Maryland D0019207, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- William J. Sadlack
- Credential
- M.D.
- Primary taxonomy
- Orthopaedic Surgery Physician 207X00000X
- License number
- D0019207 MD
Self-reported in NPPES; status is on the state search - Practice location
- 6420 Rockledge Dr, Bethesda, MD 20817
- Phone
- (301) 530-3220
- Enumerated
- Aug 25, 2005
- Record last updated
- May 9, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (301) 530-4120
- Medicaid ID
- 415096100 MD
- Entity
- Type 1 · individual
8 nearest orthopaedic surgery physician records → All 457 in Maryland → Look up another NPI →
Also registered at 6420 Rockledge Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Ada Graham, M.D.Colon & Rectal Surgery Physician1902291081
- Stephen Greco, M.D.Radiation Oncology Physician1659463750
Verify William J. Sadlack in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D0019207Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average orthopaedic surgery physician in 2024
12 Medicare Part D claims, against an average of 346 among the 16,516 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
William J. Sadlack among 457 orthopaedic surgery physician records in Maryland
William J. Sadlack, M.D. is one of 457 orthopaedic surgery physician records with a practice address in Maryland. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 83% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 65% of these records are
- Record last updated2013 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207X00000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Orthopaedic Surgery Physician providers in Maryland
There are 457 orthopaedic surgery physician records in Maryland.
All 457 in Maryland → Every provider in Bethesda → Orthopaedic Surgery Physician nationwide →
The 8 orthopaedic surgery physician records with the nearest ZIP codes
- James Gardiner, M.D.Bethesda, MD 208171295742450
- Hamid Hassanzadeh, M.D.Bethesda, MD 208171710140595
- Min Lu, MDBethesda, MD 208171043521768
- Brian McCormick, MDBethesda, MD 208171932738929
- Rajeev Pandarinath, M.D.Bethesda, MD 208171700023561
- Nirav Patel, MDBethesda, MD 208171992181895
- Christopher Raffo, MDBethesda, MD 208171750398905
- Bahman Sadr, M.D.Bethesda, MD 208171700872637
Common questions
What is William J. Sadlack, M.D.'s NPI number?
William J. Sadlack, M.D.'s National Provider Identifier (NPI) is 1104819168, issued on Aug 25, 2005. An NPI identifies a provider in billing; it is not a license.
Where is William J. Sadlack, M.D. located?
The NPPES record lists a practice address at 6420 Rockledge Dr, Bethesda, MD, 20817. Phone: (301) 530-3220. Providers update this record themselves, so call before visiting.
How can I verify William J. Sadlack, M.D.'s license?
NPPES lists Maryland license number D0019207, as entered by the provider. Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William J. Sadlack, M.D. prescribe under Medicare Part D?
In 2024, William J. Sadlack, M.D. had 12 Medicare Part D claims; the average among orthopaedic surgery physician prescribers was 346. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.