Daniel Christopher Leonard, D.D.S.
General Practice Dentistry · Chicago, IL
Daniel Christopher Leonard, D.D.S. is a general practice dentistry with a practice address in Chicago, Illinois, and NPI 1336280064, issued on Feb 8, 2007. Check the license with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Daniel Christopher Leonard
- Credential
- D.D.S.
- Primary taxonomy
- General Practice Dentistry 1223G0001X
- Practice location
- 326 S Marshfield Ave, Chicago, IL 60612
- Phone
- (312) 942-0200
- Enumerated
- Feb 8, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (312) 666-4640
- Entity
- Type 1 · individual
8 nearest general practice dentistry records → All 5,276 in Illinois → Look up another NPI →
Also registered at 326 S Marshfield Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- John Leonard, D.M.DDentist1447444641
Verify Daniel Christopher Leonard in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Illinois board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
5% more Medicare Part D claims than the average general practice dentistry in 2024
87 Medicare Part D claims for 36 beneficiaries, against an average of 83 among the 70,290 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 12 claims were for opioids.
Most prescribed
- Penicillin V Potassium28 claims
- Ibuprofen19 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: $71.71
2 payments; by number, the most common kind was food and beverage; the largest payer was Envista Holdings Corporation. The 41,669 providers of this specialty with any payment received $597.01 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.
Daniel Christopher Leonard among 5,276 general practice dentistry records in Illinois
Daniel Christopher Leonard, D.D.S. is one of 5,276 general practice dentistry 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 32% of them.
- NPI issued2007 · 32% of these records are older, 43% 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 updated2007 · 75% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1223G0001X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,148 general practice dentistry records list a practice address in Chicago
They are 1,148 of the 63,379 NPPES records with a practice address in Chicago, and 5,276 general practice dentistry records in Illinois.
All 5,276 in Illinois → Every provider in Chicago → General Practice Dentistry nationwide →
The 8 general practice dentistry records with the nearest ZIP codes
- Peter Feimer, D.D.S.Chicago, IL 606121295818656
- Dena Fischer, DDS,MSD,MSChicago, IL 606121669425005
- Amul Gandhi, D.D.S.Chicago, IL 606121982715298
- Kenneth Gehrke, DDSChicago, IL 606121013120203
- George Joseph, D.D.S.,M.S.Chicago, IL 606121164413233
- George Knight, D.D.S.Chicago, IL 606121689727372
- Alyson Koslow, DDSChicago, IL 606121992927685
- Eugene Leonard, DDSChicago, IL 606121821120908
Common questions
What is Daniel Christopher Leonard, D.D.S.'s NPI number?
Daniel Christopher Leonard, D.D.S.'s National Provider Identifier (NPI) is 1336280064, issued on Feb 8, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Daniel Christopher Leonard, D.D.S. located?
The NPPES record lists a practice address at 326 S Marshfield Ave, Chicago, IL, 60612. Phone: (312) 942-0200. Providers update this record themselves, so call before visiting.
How can I verify Daniel Christopher Leonard, D.D.S.'s license?
Search the Illinois board that licenses this profession; the NPPES record confirms identity only.
How much does Daniel Christopher Leonard, D.D.S. prescribe under Medicare Part D?
In 2024, Daniel Christopher Leonard, D.D.S. had 87 Medicare Part D claims for 36 beneficiaries; the average among general practice dentistry prescribers was 83. 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.