William James Prentice, PA
- Part D claims, 2024
- 161
- Hospital affiliations
- 1
- Industry payments
- $25
- Medical group
- 1
- State license
- 1
- Practice address
- 5555 Grossmont Center Drive Box 58, La Mesa, CA 91942
- Practice phone
- Call (619) 465-0711
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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William James Prentice is a surgical physician assistant in La Mesa, California
William Prentice practices at Sharp Grossmont Hospital in La Mesa, California, part of Sharp HealthCare.
William Prentice's NPI, 1285969543, was assigned on October 5, 2009. William Prentice holds California license PA 15229.
- NPI
- 1285969543NPI Registry (opens in a new tab)
- NPI enumeration date
- October 5, 2009
- NPI status
- Active
- Practice phone
- (619) 465-0711
- 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
William James Prentice practices at Sharp Grossmont Hospital in La Mesa, California
William Prentice's primary practice is Sharp Grossmont Hospital, at 5555 Grossmont Center Drive Box 58, La Mesa, CA 91942 in San Diego County. The practice phone is (619) 465-0711.
- Sharp Grossmont Hospital5555 Grossmont Center Drive Box 58, La Mesa, CA 91942 · San Diego CountyPhone(619) 465-0711
Source: Dmand AI Affiliation Data
William James Prentice is affiliated with 1 site of care and 1 medical group
William Prentice's primary practice is Sharp Grossmont Hospital in La Mesa, California, part of Sharp HealthCare. The medical group on file is Marque Urgent Care.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at William James Prentice's practice
Dmand AI tracks the electronic health record (EHR) system at each site where William Prentice practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Sharp Grossmont Hospital | 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 Sharp HealthCare and 6.2K+ hospitals, with verified contacts in the same login.
William James Prentice is one of 883 surgical physician assistants in California
Surgical is William Prentice's primary specialty in the NPI Registry, under taxonomy code 363AS0400X. William Prentice is board certified in certified physician assistant by the National Commission on Certification of Physician Assistants (NCCPA). William Prentice is licensed in California.
Specialties and state licenses
- Surgical physician assistant, CaliforniaPrimary
Surgical physician assistants near William Prentice
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
William James Prentice's patients have a median age of 53
Across all payers, Dmand AI patient panel data puts William Prentice's median patient age at 53, with 76% women.
William Prentice's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 53
Patient panel by sex, all payers
- Women76%
- Men24%
Source: Dmand AI Patient Panel Data
William James Prentice wrote 161 Medicare Part D claims in 2024
In 2024, William Prentice wrote 161 Medicare Part D claims for 107 patients. 82% of them were for generic drugs. CMS names the drug for 64 of them, across 4 drugs with 11 or more claims each, at $287 in total drug cost.
William Prentice's Part D claims by kind of drug, 2024
- Generic132 claims82%
- Brand-name and other29 claims18%
William Prentice'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 William Prentice's Part D claims, 2024
- Antibiotics37%59 of 161 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
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
William James Prentice received $25 in industry payments in 2025
CMS Open Payments shows 1 general payment to William Prentice from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Pfizer Inc. paid the most, $25.
Companies that paid William Prentice the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
William James Prentice is board certified in certified physician assistant
- Board certified in certified physician assistant
Source: Dmand AI Professional Profile Data
Sources for William James Prentice'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) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| 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 William James Prentice
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is William James Prentice's NPI number?
William James Prentice's NPI number is 1285969543. It was assigned on October 5, 2009, and it is active in the NPI Registry.
What does William James Prentice specialize in?
William James Prentice is a surgical physician assistant in La Mesa, California. The primary specialty in the NPI Registry is Surgical Physician Assistant (taxonomy code 363AS0400X).
Where does William James Prentice practice?
William Prentice practices at 5555 Grossmont Center Drive Box 58, La Mesa, CA 91942. William Prentice's primary practice is Sharp Grossmont Hospital in La Mesa, California, part of Sharp HealthCare.
What is William James Prentice's office phone number?
The practice phone on file for William Prentice is (619) 465-0711.
What is William James Prentice's medical license number?
William Prentice holds California license PA 15229.
Which hospitals is William James Prentice affiliated with?
William Prentice practices at Sharp Grossmont Hospital in La Mesa, California.
What medical group is William James Prentice part of?
William Prentice is linked to Marque Urgent Care.
Is William James Prentice board certified?
Yes. William Prentice is board certified in certified physician assistant by the National Commission on Certification of Physician Assistants (NCCPA).
What drugs does William James Prentice prescribe most?
In 2024 Medicare Part D data, William Prentice's most prescribed drugs by claims were Prednisone, Azithromycin and Paxlovid.
Has William James Prentice received payments from drug or device companies?
CMS Open Payments shows $25 in general payments to William Prentice from 1 company from 2025 to 2025. The largest total came from Pfizer Inc.
How long has William James Prentice been practicing?
William Prentice's NPI was assigned in 2009.
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