Mary-Margaret Williams Warrick Looker, D.D.S.
Dentist · Springfield, IL
Mary-Margaret Williams Warrick Looker, D.D.S. is a dentist with a practice address in Springfield, Illinois, and NPI 1073718920, issued on Jun 20, 2007. Check the license (Illinois 019.027535, as entered in NPPES) with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mary-Margaret Williams Warrick Looker
- Credential
- D.D.S.
- Primary taxonomy
- Dentist 122300000X
- License numbers
- 019.027535 IL
12010980A IN
Self-reported in NPPES; status is on the state search - Practice location
- 2239 E Cook St, Springfield, IL 62703
- Phone
- (217) 788-2300
- Enumerated
- Jun 20, 2007
- Record last updated
- Jan 23, 2012 (not updated in 14 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest dentist records → All 4,522 in Illinois → Look up another NPI →
Also registered at 2239 E Cook St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Yunus Ahmed, DDSGeneral Practice Dentistry1629800867
- Ashlyn Bartels, FNPFamily Nurse Practitioner1073963120
- Mohammed Baseer, M.DInternal Medicine Physician1720272321
- Lindsey BirkFamily Nurse Practitioner1174930754
- Isabel ButterfieldFamily Nurse Practitioner1154035111
- Edgard Cumpa, MDInternal Medicine Physician1497743488
Verify Mary-Margaret Williams Warrick Looker in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Illinois board licenses this profession
Search for license 019.027535Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
28% fewer Medicare Part D claims than the average dentist in 2024
62 Medicare Part D claims for 43 beneficiaries, against an average of 86 among the 51,021 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Amoxicillin43 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.
Mary-Margaret Williams Warrick Looker among 4,522 dentist records in Illinois
Mary-Margaret Williams Warrick Looker, D.D.S. is one of 4,522 dentist records with a practice address in Illinois. 64% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 19% of them.
- NPI issued2007 · 19% of these records are older, 62% newer
- In a Medicare fileYes · 64% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2012 · 74% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 122300000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
65 dentist records list a practice address in Springfield
They are 65 of the 4,997 NPPES records with a practice address in Springfield, and 4,522 dentist records in Illinois.
All 4,522 in Illinois → Every provider in Springfield → Dentist nationwide →
The 8 dentist records with the nearest ZIP codes
- Casie Burk Jones, D.M.D.Springfield, IL 627031598956732
- Refaat Hassan, DDSSpringfield, IL 627031568531697
- Robert Larison, D.D.S.Springfield, IL 627031720205115
- Ibrahim Massoud, DDSSpringfield, IL 627031598834616
- Jorge Mosquera Castrillon, DDSSpringfield, IL 627031871190884
- Tulin Ozyurt, DMDSpringfield, IL 627031013145226
- Pratik Patel, D.M.DSpringfield, IL 627031598147027
- Muzammil Saeed, DDSSpringfield, IL 627031053309054
Common questions
What is Mary-Margaret Williams Warrick Looker, D.D.S.'s NPI number?
Mary-Margaret Williams Warrick Looker, D.D.S.'s National Provider Identifier (NPI) is 1073718920, issued on Jun 20, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Mary-Margaret Williams Warrick Looker, D.D.S. located?
The NPPES record lists a practice address at 2239 E Cook St, Springfield, IL, 62703. Phone: (217) 788-2300. Providers update this record themselves, so call before visiting.
How can I verify Mary-Margaret Williams Warrick Looker, D.D.S.'s license?
NPPES lists Illinois license number 019.027535, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.
How much does Mary-Margaret Williams Warrick Looker, D.D.S. prescribe under Medicare Part D?
In 2024, Mary-Margaret Williams Warrick Looker, D.D.S. had 62 Medicare Part D claims for 43 beneficiaries; the average among dentist prescribers was 86. 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.