Philip Williams
Psychiatry Physician · Evanston, IL
Philip Williams is a psychiatry physician with a practice address in Evanston, Illinois, and NPI 1164050159, issued on Mar 27, 2020. Check the license (Illinois 036.171068, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Philip Williams
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 036.171068 IL
Self-reported in NPPES; status is on the state search - Practice location
- 500 Davis St, Evanston, IL 60201
- Phone
- (312) 640-7745
- Enumerated
- Mar 27, 2020
- Record last updated
- Oct 7, 2025
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 2,147 in Illinois → Look up another NPI →
Also registered at 500 Davis St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Philip Williams 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 036.171068Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
82% fewer Medicare Part D claims than the average psychiatry physician in 2024
180 Medicare Part D claims for 21 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims.
Most prescribed
- Lamotrigine21 claims
- Desvenlafaxine Succinate Er13 claims
- Savella12 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: $24.56
1 payment: food and beverage; the largest payer was Iti, Inc. (d/b/a Intra-Cellular Therapies, 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.
Philip Williams among 2,147 psychiatry physician records in Illinois
Philip Williams 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 2020, is newer than 81% of them.
- NPI issued2020 · 81% of these records are older, 16% newer
- In a Medicare fileYes · 69% of these records are
- In the CMS Doctors and Clinicians fileNo · 41% of these records are
- Record last updated2025 · 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).
48 psychiatry physician records list a practice address in Evanston
They are 48 of the 4,013 NPPES records with a practice address in Evanston, and 2,147 psychiatry physician records in Illinois.
All 2,147 in Illinois → Every provider in Evanston → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- David Cella, PHDEvanston, IL 602011922118983
- Stephen Chernaik, MDEvanston, IL 602011184644775
- Scott Feldman, MDEvanston, IL 602011407940166
- Daniel Giacomo, MDEvanston, IL 602011215957568
- Carin Gordon, M.D.Evanston, IL 602011942388681
- Jacqueline Haimes, MDEvanston, IL 602011518053826
- John Halderman, MDEvanston, IL 602011942279179
- Ella Komarovsky, M.D.Evanston, IL 602011912907247
Common questions
What is Philip Williams's NPI number?
Philip Williams's National Provider Identifier (NPI) is 1164050159, issued on Mar 27, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Philip Williams located?
The NPPES record lists a practice address at 500 Davis St, Evanston, IL, 60201. Phone: (312) 640-7745. Providers update this record themselves, so call before visiting.
How can I verify Philip Williams's license?
NPPES lists Illinois license number 036.171068, 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 Philip Williams prescribe under Medicare Part D?
In 2024, Philip Williams had 180 Medicare Part D claims for 21 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.