Colby J. Gerth, DMD
General Practice Dentistry · Mokena, IL
Colby J. Gerth, DMD is a general practice dentistry with a practice address in Mokena, Illinois, and NPI 1821615139, issued on Jul 2, 2020. Check the license (Illinois 019.032596, as entered in NPPES) with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Colby J. Gerth
- Credential
- DMD
- Primary taxonomy
- General Practice Dentistry 1223G0001X
- License number
- 019.032596 IL
Self-reported in NPPES; status is on the state search - Practice location
- 9990 W 190TH St Ste D, Mokena, IL 60448
- Phone
- (708) 479-9797
- Enumerated
- Jul 2, 2020
- Record last updated
- Jul 2, 2020 (not updated in 6 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest general practice dentistry records → All 5,276 in Illinois → Look up another NPI →
Verify Colby J. Gerth in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Illinois board licenses this profession
Search for license 019.032596Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
6% more Medicare Part D claims than the average general practice dentistry in 2024
88 Medicare Part D claims for 57 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.
Most prescribed
- Amoxicillin36 claims
- Methylprednisolone22 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.
Colby J. Gerth among 5,276 general practice dentistry records in Illinois
Colby J. Gerth, DMD 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 2020, is newer than 83% of them.
- NPI issued2020 · 83% of these records are older, 15% 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 updated2020 · 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).
General Practice Dentistry providers in Illinois
There are 5,276 general practice dentistry records in Illinois.
All 5,276 in Illinois → Every provider in Mokena → General Practice Dentistry nationwide →
The 8 general practice dentistry records with the nearest ZIP codes
- Thomas Maloney, DDSMokena, IL 604481699813485
- Karim Rizk, DMDMokena, IL 604481184362808
- Leon Witkowski, DDSMokena, IL 604481528192168
- Therese Bogs, DDSMonee, IL 604491891831749
- James McGehee, DDSMinooka, IL 604471629109020
- Jumana Quafisheh, DMDMinooka, IL 604471801779442
- Kurt Barth, DDSMorris, IL 604501538271572
- Hector Cabrera, DMDMorris, IL 604501225566029
Common questions
What is Colby J. Gerth, DMD's NPI number?
Colby J. Gerth, DMD's National Provider Identifier (NPI) is 1821615139, issued on Jul 2, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Colby J. Gerth, DMD located?
The NPPES record lists a practice address at 9990 W 190TH St Ste D, Mokena, IL, 60448. Phone: (708) 479-9797. Providers update this record themselves, so call before visiting.
How can I verify Colby J. Gerth, DMD's license?
NPPES lists Illinois license number 019.032596, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.
How much does Colby J. Gerth, DMD prescribe under Medicare Part D?
In 2024, Colby J. Gerth, DMD had 88 Medicare Part D claims for 57 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.