John David Chapman, PA-C
- Part D claims, 2024
- 2,371
- Hospital affiliations
- 1
- Industry payments
- $7,190
- Medical groups
- 2
- State license
- 1
- Practice address
- 921 Gessner, Houston, TX 77024
- Practice phone
- Call (713) 242-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find John Chapman'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.
John David Chapman is a surgical physician assistant in Houston, Texas
John Chapman practices at Memorial Hermann Memorial City Medical Center in Houston, Texas, part of Memorial Hermann Health System.
John Chapman's NPI, 1184268617, was assigned on October 28, 2019. John Chapman holds Texas license PA13128.
- NPI
- 1184268617NPI Registry (opens in a new tab)
- NPI enumeration date
- October 28, 2019
- NPI status
- Active
- Practice phone
- (713) 242-3000
- 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
John David Chapman practices at Memorial Hermann Memorial City Medical Center in Houston, Texas
John Chapman's primary practice is Memorial Hermann Memorial City Medical Center, at 921 Gessner, Houston, TX 77024 in Harris County. The practice phone is (713) 242-3000.
- Memorial Hermann Memorial City Medical Center921 Gessner, Houston, TX 77024 · Harris CountyPhone(713) 242-3000
Source: Dmand AI Affiliation Data
John David Chapman is affiliated with 2 sites of care and 2 medical groups
John Chapman's primary practice is Memorial Hermann Memorial City Medical Center in Houston, Texas, part of Memorial Hermann Health System. The medical group on file is UT Physicians. Dmand AI also links John Chapman to 1 more group practice or clinic and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at John David Chapman's practice
Dmand AI tracks the electronic health record (EHR) system at each site where John Chapman practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Memorial Hermann Memorial City Medical Center | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Memorial Hermann Health System and 6.2K+ hospitals, with verified contacts in the same login.
John David Chapman is one of 983 surgical physician assistants in Texas
Surgical is John Chapman's primary specialty in the NPI Registry, under taxonomy code 363AS0400X. John Chapman is licensed in Texas.
Specialties and state licenses
- Surgical physician assistant, TexasPrimary
Surgical physician assistants near John Chapman
Counts of surgical physician assistants 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
John David Chapman's patients have a median age of 48
Across all payers, Dmand AI patient panel data puts John Chapman's median patient age at 48, with 4% women.
John Chapman's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 48
Patient panel by sex, all payers
- Women4%
- Men95%
Source: Dmand AI Patient Panel Data
John David Chapman wrote 2,371 Medicare Part D claims in 2024
In 2024, John Chapman wrote 2,371 Medicare Part D claims for 138 patients. 64% of them were for generic drugs. CMS names the drug for 1,917 of them, across 68 drugs with 11 or more claims each, at $2,509,196 in total drug cost.
John Chapman's Part D claims by kind of drug, 2024
- Generic1,523 claims64%
- Brand-name848 claims36%
John Chapman's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in John Chapman's Part D claims, 2024
- Opioids1%20 of 2,371 claims
- Antibiotics3%60 of 2,371 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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John David Chapman received $7,190 in industry payments from 2024 to 2025
CMS Open Payments shows 332 general payments to John Chapman from 21 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 100% of the total. ViiV Healthcare Company paid the most, $3,060.
General payments to John Chapman by program year, 2024 to 2025
Companies that paid John Chapman the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for John David Chapman'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 DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| 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 John David Chapman
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is John David Chapman's NPI number?
John David Chapman's NPI number is 1184268617. It was assigned on October 28, 2019, and it is active in the NPI Registry.
What does John David Chapman specialize in?
John David Chapman is a surgical physician assistant in Houston, Texas. The primary specialty in the NPI Registry is Surgical Physician Assistant (taxonomy code 363AS0400X).
Where does John David Chapman practice?
John Chapman practices at 921 Gessner, Houston, TX 77024. John Chapman's primary practice is Memorial Hermann Memorial City Medical Center in Houston, Texas, part of Memorial Hermann Health System. Dmand AI also links John Chapman to 1 group practice or clinic and 1 medical group.
What is John David Chapman's office phone number?
The practice phone on file for John Chapman is (713) 242-3000.
What is John David Chapman's medical license number?
John Chapman holds Texas license PA13128.
Which hospitals is John David Chapman affiliated with?
John Chapman practices at Memorial Hermann Memorial City Medical Center in Houston, Texas.
What medical group is John David Chapman part of?
John Chapman is linked to UT Physicians. Dmand AI links John Chapman to 1 more medical group.
What drugs does John David Chapman prescribe most?
In 2024 Medicare Part D data, John Chapman's most prescribed drugs by claims were Biktarvy, Atorvastatin Calcium and Descovy.
Has John David Chapman received payments from drug or device companies?
CMS Open Payments shows $7,190 in general payments to John Chapman from 21 companies from 2024 to 2025. The largest total came from ViiV Healthcare Company.
How long has John David Chapman been practicing?
John Chapman's NPI was assigned in 2019.
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