Alex Sidlak, M.D.
Emergency Medicine Physician · Washington, DC
Alex Sidlak, M.D. is an emergency medicine physician with a practice address in Washington, District of Columbia, and NPI 1063827434, issued on Jun 24, 2014. Check the license (District of Columbia MD500001758, as entered in NPPES) on the District of Columbia Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Alex Sidlak
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- MD500001758 DC
MD206234 PA
0101268264 VA
0101268284 VA
Self-reported in NPPES; status is on the state search - Practice location
- 900 23RD St NW, Washington, DC 20037
- Phone
- (202) 715-4000
- Enumerated
- Jun 24, 2014
- Record last updated
- Oct 11, 2023
- Medicare enrollment
- Enrolled (PECOS I20200915001076); accepts Medicare assignment
- Medical or professional school
- Northwestern University Feinberg Medical School, 2014
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 360 in District of Columbia → Look up another NPI →
Also registered at 900 23RD St NW
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Alex Sidlak in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersDistrict of Columbia Board of Medicine
Search for license MD500001758Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
42% fewer Medicare Part D claims than the average emergency medicine physician in 2024
130 Medicare Part D claims for 95 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 13 claims were for opioids.
Most prescribed
- Cephalexin13 claims
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.
Bills Medicare through one group practice
- Emergency Medicine Associates P.A., P.C.Washington, DC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Alex Sidlak among 360 emergency medicine physician records in District of Columbia
Alex Sidlak, M.D. is one of 360 emergency medicine physician records with a practice address in District of Columbia. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 63% of them.
- NPI issued2014 · 63% of these records are older, 32% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 44% of these records are
- Graduated2014 · median 2014 among the 160 with a school on file
- Record last updated2023 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a District of Columbia practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
360 emergency medicine physician records list a practice address in Washington
They are 360 of the 45,857 NPPES records with a practice address in Washington, and 360 emergency medicine physician records in District of Columbia.
All 360 in District of Columbia → Every provider in Washington → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Keith Boniface, MDWashington, DC 200371659329498
- Yolanda Haywood, MDWashington, DC 200371326058231
- Thomas Kirsch, M.D.Washington, DC 200371790726776
- John Lafleur, MDWashington, DC 200371992719108
- Jennifer Lee, MDWashington, DC 200371295838613
- David Marcozzi, M.D., MHS-CLWashington, DC 200371154405033
- Larissa May, MDWashington, DC 200371083624282
- Andrew Meltzer, M.D.Washington, DC 200371366478505
Common questions
What is Alex Sidlak, M.D.'s NPI number?
Alex Sidlak, M.D.'s National Provider Identifier (NPI) is 1063827434, issued on Jun 24, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Alex Sidlak, M.D. located?
The NPPES record lists a practice address at 900 23RD St NW, Washington, DC, 20037. Phone: (202) 715-4000. Providers update this record themselves, so call before visiting.
How can I verify Alex Sidlak, M.D.'s license?
NPPES lists District of Columbia license number MD500001758, as entered by the provider. Search the District of Columbia Board of Medicine at https://dchealth.dc.gov/bomed. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Alex Sidlak, M.D. prescribe under Medicare Part D?
In 2024, Alex Sidlak, M.D. had 130 Medicare Part D claims for 95 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.