Thomas Alan Armistead, M.D.
Psychiatry Physician · Chicago, IL
Thomas Alan Armistead, M.D. is a psychiatry physician with a practice address in Chicago, Illinois, and NPI 1912957176, issued on May 10, 2006. Check the license on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Thomas Alan Armistead
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- Practice location
- 4444 W Montrose Ave, Chicago, IL 60641
- Phone
- (773) 286-0668
- Enumerated
- May 10, 2006
- Record last updated
- Mar 28, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (773) 286-0554
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 2,147 in Illinois → Look up another NPI →
Also registered at 4444 W Montrose Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Steven Comrov, M.D.Family Medicine Physician1205885282
Verify Thomas Alan Armistead in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional RegulationCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
About as many Medicare Part D claims as the average psychiatry physician in 2024
1,001 Medicare Part D claims for 50 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 4% of claims.
Most prescribed
- Clozapine64 claims
- Olanzapine54 claims
- Benztropine Mesylate43 claims
- Bupropion Xl41 claims
- Clonazepam41 claims
- Gabapentin39 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.
Thomas Alan Armistead among 2,147 psychiatry physician records in Illinois
Thomas Alan Armistead, M.D. is one of 2,147 psychiatry physician records with a practice address in Illinois. 69% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 65% newer
- In a Medicare fileYes · 69% of these records are
- In the CMS Doctors and Clinicians fileNo · 41% of these records are
- Record last updated2008 · 53% 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 Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
841 psychiatry physician records list a practice address in Chicago
They are 841 of the 63,379 NPPES records with a practice address in Chicago, and 2,147 psychiatry physician records in Illinois.
All 2,147 in Illinois → Every provider in Chicago → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Lisa Siegel, MDChicago, IL 606411104926906
- Jennifer Adams, M.D.Chicago, IL 606401487185260
- Jonathan Adelstein, M.D.Chicago, IL 606401053603613
- Edward BurkeChicago, IL 606401407262314
- Elaine Burke, D.O.Chicago, IL 606401114238680
- Fidel Echevarria, M.D.Chicago, IL 606401841382959
- Kelsey Frain, APRNChicago, IL 606421649057795
- Jamie Fyda, MDChicago, IL 606421518548429
Common questions
What is Thomas Alan Armistead, M.D.'s NPI number?
Thomas Alan Armistead, M.D.'s National Provider Identifier (NPI) is 1912957176, issued on May 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Thomas Alan Armistead, M.D. located?
The NPPES record lists a practice address at 4444 W Montrose Ave, Chicago, IL, 60641. Phone: (773) 286-0668. Providers update this record themselves, so call before visiting.
How can I verify Thomas Alan Armistead, M.D.'s license?
Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Thomas Alan Armistead, M.D. prescribe under Medicare Part D?
In 2024, Thomas Alan Armistead, M.D. had 1,001 Medicare Part D claims for 50 beneficiaries; 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.