Michael Walker, M.D.
Psychiatry Physician · Worcester, MA
Michael Walker, M.D. is a psychiatry physician with a practice address in Worcester, Massachusetts, and NPI 1467891796, issued on Jun 20, 2013. Check the license (Massachusetts 256943, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Michael Walker
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 256943 MA
Self-reported in NPPES; status is on the state search - Practice location
- 55 Lake Ave N, Worcester, MA 01655
- Phone
- (508) 334-1000
- Enumerated
- Jun 20, 2013
- Record last updated
- Jun 20, 2013 (not updated in 13 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 2,736 in Massachusetts → Look up another NPI →
Also registered at 55 Lake Ave N
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Zainab AbbasDermatology Physician1609028000
- Mary-Alice Abbott, MDClinical Genetics (M.D.) Physician1982799417
Verify Michael 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 256943Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average psychiatry physician in 2024
12 Medicare Part D claims, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Alprazolam12 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.
Michael Walker among 2,736 psychiatry physician records in Massachusetts
Michael Walker, M.D. is one of 2,736 psychiatry physician records with a practice address in Massachusetts. 65% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 74% of them.
- NPI issued2013 · 74% of these records are older, 24% newer
- In a Medicare fileYes · 65% of these records are
- In the CMS Doctors and Clinicians fileNo · 45% of these records are
- Record last updated2013 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
133 psychiatry physician records list a practice address in Worcester
They are 133 of the 13,166 NPPES records with a practice address in Worcester, and 2,736 psychiatry physician records in Massachusetts.
All 2,736 in Massachusetts → Every provider in Worcester → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Nancy Byatt, D.O.Worcester, MA 016551487635736
- Cezar Cimpeanu, M.D.Worcester, MA 016551235120858
- Kimberlee Kusiak, M.D.Worcester, MA 016551639157050
- Margaret Lawler, MDWorcester, MA 016551225016702
- Mercedes Menendez, M.D.Worcester, MA 016551891779054
- David Morin, M.D.Worcester, MA 016551215910914
- David Olson, M.D.Worcester, MA 016551982687679
- Paul Plasky, M.D.Worcester, MA 016551144203027
Common questions
What is Michael Walker, M.D.'s NPI number?
Michael Walker, M.D.'s National Provider Identifier (NPI) is 1467891796, issued on Jun 20, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Michael Walker, M.D. located?
The NPPES record lists a practice address at 55 Lake Ave N, Worcester, MA, 01655. Phone: (508) 334-1000. Providers update this record themselves, so call before visiting.
How can I verify Michael Walker, M.D.'s license?
NPPES lists Massachusetts license number 256943, 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 Michael Walker, M.D. prescribe under Medicare Part D?
In 2024, Michael Walker, M.D. had 12 Medicare Part D claims; the average among psychiatry physician prescribers was 1,000. 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.