William J. Giakas, M.D.
Psychiatry Physician · Rockford, IL
William J. Giakas, M.D. is a psychiatry physician with a practice address in Rockford, Illinois, and NPI 1821009127, issued on Aug 11, 2006. Check the license (Illinois 36083961, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- William J. Giakas
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 36083961 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1639 N Alpine, Rockford, IL 61107
- Phone
- (815) 654-7772
- Enumerated
- Aug 11, 2006
- Record last updated
- Sep 24, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (815) 654-7009
- Medicaid ID
- 036083961 IL
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 2,147 in Illinois → Look up another NPI →
Verify William J. Giakas 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 36083961Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
13% fewer Medicare Part D claims than the average psychiatry physician in 2024
873 Medicare Part D claims for 87 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims.
Most prescribed
- Alprazolam154 claims
- Zolpidem Tartrate64 claims
- Olanzapine62 claims
- Spravato60 claims
- Fluoxetine Hcl53 claims
- Sertraline Hcl51 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: $31.60
1 payment: food and beverage; the largest payer was Alkermes, Inc. The 13,693 providers of this specialty with any payment received $4,954.93 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.
William J. Giakas among 2,147 psychiatry physician records in Illinois
William J. Giakas, 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 updated2015 · 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 Rockford → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Imad Albasha, MDRockford, IL 611071467584516
- Raymond Garcia, MDRockford, IL 611071245217959
- Steven Kouris, DORockford, IL 611071154306389
- Kamal Modir, MDRockford, IL 611071568447795
- Jessica Stier, M.D.Rockford, IL 611071447608492
- David Wight, M.D.Rockford, IL 611071740471317
- Uma Srivastava, MDRockford, IL 611081194815290
- Khatija Vaid, M.DRockford, IL 611081366641714
Common questions
What is William J. Giakas, M.D.'s NPI number?
William J. Giakas, M.D.'s National Provider Identifier (NPI) is 1821009127, issued on Aug 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William J. Giakas, M.D. located?
The NPPES record lists a practice address at 1639 N Alpine, Rockford, IL, 61107. Phone: (815) 654-7772. Providers update this record themselves, so call before visiting.
How can I verify William J. Giakas, M.D.'s license?
NPPES lists Illinois license number 36083961, 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 William J. Giakas, M.D. prescribe under Medicare Part D?
In 2024, William J. Giakas, M.D. had 873 Medicare Part D claims for 87 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.