AcetatesChromatography, High Pressure LiquidChromatography, Reverse-Phase
Dr. Gregory Joseph Weissler II, MD
NPI1861029514
- Publications
- 1
- Industry payments
- $17
- Affiliated sites
- 2
- Medical group
- 1
- State license
- 1
- Practice address
- 1011 Bowles Ave, Fenton, MO 63026
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
SSM Cancer Care South Schc - HOPD
Acute Care Hospital outpatient department · Fenton, Missouri
Find Dr. Weissler's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Gregory Joseph Weissler II is a pediatrician in Fenton, Missouri
Dr. Weissler practices at SSM Cancer Care South Schc - HOPD in Fenton, Missouri.
Dr. Weissler's NPI, 1861029514, was assigned on March 24, 2020. Dr. Weissler holds Missouri license 2023013879.
NPI and contact details
- NPI
- 1861029514NPI Registry (opens in a new tab)
- NPI enumeration date
- March 24, 2020
- NPI status
- Active
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Gregory Joseph Weissler II practices at SSM Cancer Care South Schc - HOPD in Fenton, Missouri
Dr. Weissler's primary practice is SSM Cancer Care South Schc - HOPD, at 1011 Bowles Ave, Fenton, MO 63026.
- SSM Cancer Care South Schc - HOPD1011 Bowles Ave, Fenton, MO 63026
Source: Dmand AI Affiliation Data
Dr. Gregory Joseph Weissler II is affiliated with 2 sites of care and 1 medical group
Dr. Weissler's primary practice is SSM Cancer Care South Schc - HOPD in Fenton, Missouri. The medical group on file is SSM Health Medical Group. Dmand AI also links Dr. Weissler to 1 more group practice or clinic, named with a free account. Dr. Weissler's employer is on file too: a hospital.
SSM Cancer Care South Schc - HOPDPrimary
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Gregory Joseph Weissler II's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Weissler practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| SSM Cancer Care South Schc - HOPD | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gregory Joseph Weissler II is one of 1,158 pediatricians in Missouri
Pediatrics is Dr. Weissler's primary specialty in the NPI Registry, under taxonomy code 208000000X. Dr. Weissler is licensed in Missouri.
Specialties and state licenses
- Pediatrics, MissouriPrimary
Pediatricians near Dr. Weissler
Counts of pediatricians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Gregory Joseph Weissler II's patients have a median age of 8
Across all payers, Dmand AI patient panel data puts Dr. Weissler's median patient age at 8, with 41% women.
Dr. Weissler's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 8
Patient panel by sex, all payers
- Women41%
- Men59%
Source: Dmand AI Patient Panel Data
Dr. Gregory Joseph Weissler II has 1 publication on record
Dmand AI links 1 paper to Dr. Weissler in 2016. Dr. Weissler's most frequent co-author is Daniel Pike, MD, PhD.
Papers1
Dr. Weissler's most frequent co-authors
Recent publications by Dr. Weissler
See who Dr. Weissler researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Weissler works with, so you can find a warm path to the right pediatricians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Gregory Joseph Weissler II received $17 in industry payments in 2023
CMS Open Payments shows 1 general payment to Dr. Weissler from 1 drug or device company in 2023. Food and beverage make up the largest share, 100% of the total. Exact Sciences Corporation paid the most, $17.
Companies that paid Dr. Weissler the most, 2023 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Gregory Joseph Weissler II's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Gregory Joseph Weissler II
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Gregory Joseph Weissler II's NPI number?
Dr. Gregory Joseph Weissler II's NPI number is 1861029514. It was assigned on March 24, 2020, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory Joseph Weissler II?
Dr. Gregory Joseph Weissler II is a pediatrician in Fenton, Missouri. The primary specialty in the NPI Registry is Pediatrics Physician (taxonomy code 208000000X).
Where does Dr. Gregory Joseph Weissler II practice?
Dr. Weissler practices at 1011 Bowles Ave, Fenton, MO 63026. Dr. Weissler's primary practice is SSM Cancer Care South Schc - HOPD in Fenton, Missouri. Dmand AI also links Dr. Weissler to 1 group practice or clinic.
What is Dr. Gregory Joseph Weissler II's medical license number?
Dr. Weissler holds Missouri license 2023013879.
What medical group is Dr. Gregory Joseph Weissler II part of?
Dr. Weissler is linked to SSM Health Medical Group.
Has Dr. Gregory Joseph Weissler II received payments from drug or device companies?
CMS Open Payments shows $17 in general payments to Dr. Weissler from 1 company from 2023 to 2023. The largest total came from Exact Sciences Corporation.
How long has Dr. Gregory Joseph Weissler II been practicing?
Dr. Weissler's NPI was assigned in 2020.
Does Dr. Gregory Joseph Weissler II do research?
Dmand AI links 1 publication to Dr. Weissler.
Who does Dr. Gregory Joseph Weissler II publish with?
Dr. Weissler's most frequent co-authors are Daniel Pike, MD, PhD (1 shared paper).
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