Alexander O. Walker, M.D.
Emergency Medicine Physician · Melrose, MA
Alexander O. Walker, M.D. is an emergency medicine physician with a practice address in Melrose, Massachusetts, and NPI 1033182688, issued on Feb 13, 2006. Check the license (Massachusetts 216791, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Alexander O. Walker
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- 216791 MA
A85740 CA
Self-reported in NPPES; status is on the state search - Practice location
- 585 Lebanon St, Melrose, MA 02176
- Phone
- (781) 979-3635
- Enumerated
- Feb 13, 2006
- Record last updated
- Apr 28, 2008 (not updated in 18 years: call before relying on the address or phone)
- Medicaid ID
- 2013568 MA
- Medicare enrollment
- Enrolled (PECOS I20050505000145); accepts Medicare assignment
- Medical or professional school
- Boston University School Of Medicine, 2000
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,829 in Massachusetts → Look up another NPI →
Also registered at 585 Lebanon St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Fatima AbdallaNurse Practitioner1326407529
- Amnah Abdulrhman M. AbdulhaqPharmacist1538023221
- Jacalyn Agrillo, PT, MSPTPhysical Therapist1326259342
- Therese Almeida, PTPhysical Therapist1477764173
- Mohammed Alqaryan, PHARMDPharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1235007584
- Najlaa Alsini, PHARMDPharmacist1982558441
Verify Alexander O. Walker in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 216791Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
77% fewer Medicare Part D claims than the average emergency medicine physician in 2024
52 Medicare Part D claims for 18 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
Most prescribed
- Hydrochlorothiazide11 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.
Industry payments in 2024: $20.00
1 payment: education; the largest payer was Csl Behring. The 12,335 providers of this specialty with any payment received $953.79 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Hallmark Health Urgent Care Physicians LLCMedford, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Alexander O. Walker among 1,829 emergency medicine physician records in Massachusetts
Alexander O. Walker, M.D. is one of 1,829 emergency medicine physician records with a practice address in Massachusetts. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 59% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2000 · median 2011 among the 1,200 with a school on file
- Record last updated2008 · 57% 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 Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
10 emergency medicine physician records list a practice address in Melrose
They are 10 of the 485 NPPES records with a practice address in Melrose, and 1,829 emergency medicine physician records in Massachusetts.
All 1,829 in Massachusetts → Every provider in Melrose → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Sonia Beauvais, MDMelrose, MA 021761891733218
- Elijah Berg, MDMelrose, MA 021761902875107
- Shannon Bottari, MDMelrose, MA 021761922020353
- Christopher Defazio, MDMelrose, MA 021761396711602
- Gary Kleeman, DOMelrose, MA 021761992743744
- Ariel Leroy, M.D.Melrose, MA 021761295154920
- Thomas Michelman, M.D.Melrose, MA 021761093752214
- Steven Sbardella, M.D.Melrose, MA 021761275594400
Common questions
What is Alexander O. Walker, M.D.'s NPI number?
Alexander O. Walker, M.D.'s National Provider Identifier (NPI) is 1033182688, issued on Feb 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Alexander O. Walker, M.D. located?
The NPPES record lists a practice address at 585 Lebanon St, Melrose, MA, 02176. Phone: (781) 979-3635. Providers update this record themselves, so call before visiting.
How can I verify Alexander O. Walker, M.D.'s license?
NPPES lists Massachusetts license number 216791, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Alexander O. Walker, M.D. prescribe under Medicare Part D?
In 2024, Alexander O. Walker, M.D. had 52 Medicare Part D claims for 18 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.