Elizabeth K. McMasters, MD
Psychiatry Physician · McHenry, IL
Elizabeth K. McMasters, MD is a psychiatry physician with a practice address in McHenry, Illinois, and NPI 1427067180, issued on Aug 5, 2006. Check the license (Illinois 036-087029, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Elizabeth K. McMasters
- Credential
- MD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 036-087029 IL
Self-reported in NPPES; status is on the state search - Practice location
- 4201 W Medical Center Dr, McHenry, IL 60050
- Phone
- (815) 338-6600
- Enumerated
- Aug 5, 2006
- Record last updated
- Jan 28, 2019 (not updated in 7 years: call before relying on the address or phone)
- Medicaid ID
- 036087029 IL
- Medicare enrollment
- Enrolled (PECOS I20080430000610); accepts Medicare assignment
- Medical or professional school
- Northwestern University Feinberg Medical School, 1992
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 2,147 in Illinois → Look up another NPI →
Also registered at 4201 W Medical Center Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Elias AbousaadInternal Medicine Physician1952751877
- Kimberly Ackert, PA-CPhysician Assistant1538172739
- Van AliEmergency Medicine Physician1457674582
- Wasfia Alikhan, M.D.Diagnostic Radiology Physician1902291834
- Yasser Almadani, MDStudent in an Organized Health Care Education/Training Program1881497634
- Altaf Aman, M.D.Hospitalist Physician1942381132
Verify Elizabeth K. McMasters in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036-087029Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
41% fewer Medicare Part D claims than the average psychiatry physician in 2024
589 Medicare Part D claims for 78 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
- Quetiapine Fumarate78 claims
- Lamotrigine55 claims
- Gabapentin32 claims
- Sertraline Hcl31 claims
- Alprazolam28 claims
- Divalproex Sodium27 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.
The MIPS final score for 2023 (Medicare payment program): 94.1 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Central Dupage Physician GroupHuntley, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Elizabeth K. McMasters among 2,147 psychiatry physician records in Illinois
Elizabeth K. McMasters, MD 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 fileYes · 41% of these records are
- Graduated1992 · median 2004 among the 877 with a school on file
- Record last updated2019 · 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).
Psychiatry Physician providers in Illinois
There are 2,147 psychiatry physician records in Illinois.
All 2,147 in Illinois → Every provider in McHenry → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Ebelechukwu Chinweze, MDMcHenry, IL 600501114040904
- Derek Ho, MDMcHenry, IL 600501477909083
- Paul Berkowitz, M.D.Libertyville, IL 600481275564197
- Elvina Berman, M.DLibertyville, IL 600481366487688
- Elisabeth Desapereira, MDLibertyville, IL 600481134196678
- Michael Greenbaum, MDLibertyville, IL 600481598792970
- Nicole Jacques, LSWLibertyville, IL 600481013870609
- Qurat Ul Ain KhanLibertyville, IL 600481487817128
Common questions
What is Elizabeth K. McMasters, MD's NPI number?
Elizabeth K. McMasters, MD's National Provider Identifier (NPI) is 1427067180, issued on Aug 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Elizabeth K. McMasters, MD located?
The NPPES record lists a practice address at 4201 W Medical Center Dr, McHenry, IL, 60050. Phone: (815) 338-6600. Providers update this record themselves, so call before visiting.
How can I verify Elizabeth K. McMasters, MD's license?
NPPES lists Illinois license number 036-087029, as entered by the provider. 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 Elizabeth K. McMasters, MD prescribe under Medicare Part D?
In 2024, Elizabeth K. McMasters, MD had 589 Medicare Part D claims for 78 beneficiaries; the average among psychiatry physician prescribers was 1,000. Part D covers Medicare prescriptions only.
What is Elizabeth K. McMasters, MD's MIPS final score?
The 2023 MIPS final score is 94.1 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.