Jack Guo
Endodontics · O Fallon, MO
Jack Guo is an endodontics with a practice address in O Fallon, Missouri, and NPI 1669110599, issued on May 20, 2022. Check the license (Missouri 2024015466, as entered in NPPES) with the Missouri board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Jack Guo
- Primary taxonomy
- Endodontics 1223E0200X
- License number
- 2024015466 MO
Self-reported in NPPES; status is on the state search - Practice location
- 113 Church St, O Fallon, MO 63366
- Phone
- (636) 362-4040
- Enumerated
- May 20, 2022
- Record last updated
- Jul 16, 2026
- Entity
- Type 1 · individual
8 nearest endodontics records → All 77 in Missouri → Look up another NPI →
Verify Jack Guo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Missouri board licenses this profession
Search for license 2024015466Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
79% fewer Medicare Part D claims than the average endodontics in 2024
25 Medicare Part D claims for 15 beneficiaries, against an average of 121 among the 4,119 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Amoxicillin12 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: $42.52
1 payment: food and beverage; the largest payer was Envista Holdings Corporation. The 2,057 providers of this specialty with any payment received $49,739.86 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.
Jack Guo among 77 endodontics records in Missouri
Jack Guo is one of 77 endodontics records with a practice address in Missouri. 62% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2022, is newer than 96% of them.
- NPI issued2022 · 96% of these records are older, 3% newer
- In a Medicare fileYes · 62% of these records are
- In the CMS Doctors and Clinicians fileNo · 0% of these records are
- Record last updated2026 · 73% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1223E0200X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endodontics providers in Missouri
There are 77 endodontics records in Missouri.
All 77 in Missouri → Every provider in O Fallon → Endodontics nationwide →
The 8 endodontics records with the nearest ZIP codes
- Spencer Elmore, D.D.S, M.S.Dardenne Prairie, MO 633681285824359
- Shelly Sarich, D.D.S., M.S.Dardenne Prairie, MO 633681841218807
- Gregory Berg, DDSSt Peters, MO 633761942260575
- Scott Newlin, D.M.D.,M.S.,P.CSaint Peters, MO 633761437229739
- Ted Beauchamp, DDSWentzville, MO 633851518198019
- Courtney Kanive, D.M.D., M.S.Wentzville, MO 633851477656742
- Daniel Dunbar, D.M.D., M.S.Saint Louis, MO 631441578723292
- Mark Berg, DDSSt Louis, MO 631411134217318
Common questions
What is Jack Guo's NPI number?
Jack Guo's National Provider Identifier (NPI) is 1669110599, issued on May 20, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Jack Guo located?
The NPPES record lists a practice address at 113 Church St, O Fallon, MO, 63366. Phone: (636) 362-4040. Providers update this record themselves, so call before visiting.
How can I verify Jack Guo's license?
NPPES lists Missouri license number 2024015466, as entered by the provider. Search the Missouri board that licenses this profession; the NPPES record confirms identity only.
How much does Jack Guo prescribe under Medicare Part D?
In 2024, Jack Guo had 25 Medicare Part D claims for 15 beneficiaries; the average among endodontics prescribers was 121. 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.