John A. Los, DDS
General Practice Dentistry · Hinsdale, IL
John A. Los, DDS is a general practice dentistry with a practice address in Hinsdale, Illinois, and NPI 1932327483, issued on Apr 22, 2007. Check the license (Illinois 019-18245, as entered in NPPES) with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- John A. Los
- Credential
- DDS
- Primary taxonomy
- General Practice Dentistry 1223G0001X
- License number
- 019-18245 IL
Self-reported in NPPES; status is on the state search - Practice location
- 201 E Ogden Ave, Hinsdale, IL 60521
- Phone
- (630) 323-9540
- Enumerated
- Apr 22, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (630) 323-9545
- Entity
- Type 1 · individual
8 nearest general practice dentistry records → All 5,276 in Illinois → Look up another NPI →
Also registered at 201 E Ogden Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Stephanie Bakosh, MSN, ANP-BCPsychiatric/Mental Health Nurse Practitioner1093156408
- Mayumi BarrackPhysical Therapist1487088795
- Jodyne Bilstrom, MSW, LCSWClinical Social Worker1801293857
- Martha Calden, DOInternal Medicine Physician1306919972
- Kevin Callahan, DPTPhysical Therapist1801836358
- Krista Foster, LMTMassage Therapist1790199230
Verify John A. Los in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Illinois board licenses this profession
Search for license 019-18245Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
19% fewer Medicare Part D claims than the average general practice dentistry in 2024
67 Medicare Part D claims for 33 beneficiaries, against an average of 83 among the 70,290 providers of this specialty who prescribed in Part D.
Most prescribed
- Amoxicillin30 claims
- Azithromycin14 claims
- Chlorhexidine Gluconate11 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.
John A. Los among 5,276 general practice dentistry records in Illinois
John A. Los, DDS 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).
23 general practice dentistry records list a practice address in Hinsdale
They are 23 of the 1,290 NPPES records with a practice address in Hinsdale, and 5,276 general practice dentistry records in Illinois.
All 5,276 in Illinois → Every provider in Hinsdale → General Practice Dentistry nationwide →
The 8 general practice dentistry records with the nearest ZIP codes
- Zivile Chirban, D.D.S.Hinsdale, IL 605211316071434
- Thomas Cratin, D.D.S.Hinsdale, IL 605211801941828
- Gregory Daniels, DDSHinsdale, IL 605211083773493
- Thomas Karagiannis, DMDHinsdale, IL 605211598873937
- William Kleiber, DDSHinsdale, IL 605211528284890
- Diane Kleiber, DDSHinsdale, IL 605211164648416
- James Lovelace, D.D.S.Hinsdale, IL 605211447321799
- Michael Novak, DDSHinsdale, IL 605211346302973
Common questions
What is John A. Los, DDS's NPI number?
John A. Los, DDS's National Provider Identifier (NPI) is 1932327483, issued on Apr 22, 2007. An NPI identifies a provider in billing; it is not a license.
Where is John A. Los, DDS located?
The NPPES record lists a practice address at 201 E Ogden Ave, Hinsdale, IL, 60521. Phone: (630) 323-9540. Providers update this record themselves, so call before visiting.
How can I verify John A. Los, DDS's license?
NPPES lists Illinois license number 019-18245, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.
How much does John A. Los, DDS prescribe under Medicare Part D?
In 2024, John A. Los, DDS had 67 Medicare Part D claims for 33 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.