Am J Gastroenterol
Ambulatory CareColonic Diseases, FunctionalDrug Utilization
Dr. John Wong, MD
NPI1659336402PAC ID0749279446
- Medicare services, 2016
- 79
- Part D claims, 2024
- 4,325
- Publications
- 1
- Industry payments
- $765
- Affiliated sites
- 2
- Practice address
- 1221 E Arrow Hwy, Upland, CA 91786
- Practice phone
- Call (909) 985-1903
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Upland Rehabilitation & Care Center
Skilled Nursing Facility · Upland, California
Find Dr. Wong'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. John Wong is an internist in Upland, California
Dr. Wong practices at Upland Rehabilitation & Care Center in Upland, California.
Dr. Wong's NPI, 1659336402, was assigned on April 17, 2006. Dr. Wong graduated from McGill University Faculty of Medicine in 1991. Dr. Wong holds California license A51406.
NPI and contact details
- NPI
- 1659336402NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0749279446
- NPI enumeration date
- April 17, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (909) 985-1903
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 61
- Medical school graduation
- 1991
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John Wong practices at Upland Rehabilitation & Care Center in Upland, California
Dr. Wong's primary practice is Upland Rehabilitation & Care Center, at 1221 E Arrow Hwy, Upland, CA 91786 in San Bernardino County. The practice phone is (909) 985-1903.
- Upland Rehabilitation & Care Center1221 E Arrow Hwy, Upland, CA 91786 · San Bernardino CountyPhone(909) 985-1903
Source: Dmand AI Affiliation Data
Dr. John Wong is affiliated with 2 sites of care and 2 medical groups
Dr. Wong's primary practice is Upland Rehabilitation & Care Center in Upland, California. The medical group on file is Southern California Permanente Medical Group. Dmand AI also links Dr. Wong to 1 more group practice or clinic and 1 medical group, each named with a free account.
Upland Rehabilitation & Care CenterPrimary
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John Wong's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Wong practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Upland Rehabilitation & Care Center | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John Wong is one of 16,751 internists in California
Internal medicine is Dr. Wong's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Wong is board certified in hospice and palliative medicine by the American Board of Internal Medicine. Dmand AI has Dr. Wong's licenses on file in 2 states: California and Oregon.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
- Oregon license
Internists near Dr. Wong
Counts of internists 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. John Wong billed Medicare for 79 services in 2016
CMS data shows 79 Medicare services from Dr. Wong across 1 procedure code in 2016. Medicare paid $3,436 for them. Every service was in an office.
Medicare services, 201679
Paid by Medicare$3,436
Procedure codes1
Dr. Wong compared with the California median for internists, 2016
- Dr. Wong
- California median
- Medicare services
- 79vs 36178% below
- Part D claims
- 3,775vs 4219.0 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Wong's most billed Medicare procedure codes, 2016
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Wong?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Wong and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John Wong's patients have a median age of 82
Across all payers, Dmand AI patient panel data puts Dr. Wong's median patient age at 82, with 63% women.
Dr. Wong's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 82
Patient panel by sex, all payers
- Women63%
- Men37%
Source: Dmand AI Patient Panel Data
Dr. John Wong wrote 4,325 Medicare Part D claims in 2024
In 2024, Dr. Wong wrote 4,325 Medicare Part D claims for 290 patients. 86% of them were for generic drugs. CMS names the drug for 3,775 of them, across 99 drugs with 11 or more claims each, at $212,024 in total drug cost. In 2023, CMS named 2,770 claims across 79 drugs.
Part D claims, 20244,325
Drugs named by CMS99
Total drug cost$212,024
Part D patients290
Dr. Wong's Part D claims by kind of drug, 2024
- Generic3,702 claims86%
- Brand-name and other623 claims14%
Dr. Wong'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 Dr. Wong's Part D claims, 2024
- Opioids7%288 of 4,325 claims
- Antibiotics2%108 of 4,325 claims
- Antipsychotics, patients 65 and over2%71 of 4,325 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 2,7702024: 3,77536%
Drugs named by CMS: 99 in 2024, 79 in 2023.
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
How Dr. John Wong takes part in Medicare
Dr. Wong accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. John Wong has 1 publication on record
Dmand AI links 1 paper to Dr. Wong. Dr. Wong's most frequent co-author is Joshua Judah Ofman, MD.
Papers1
Dr. Wong's most frequent co-authors
- Joshua Judah Ofman, MD1 shared paper
Recent publications by Dr. Wong
See who Dr. Wong researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Wong works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. John Wong received $765 in industry payments from 2016 to 2025
CMS Open Payments shows 37 general payments to Dr. Wong from 12 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Otsuka America Pharmaceutical, Inc. paid the most, $144.
General payments to Dr. Wong by program year, 2016 to 2025
Companies that paid Dr. Wong the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John Wong graduated from McGill University Faculty of Medicine
Dr. Wong graduated from McGill University Faculty of Medicine in 1991.
- Medical school
- Board certified in hospice and palliative medicine
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. John Wong accepts plans from 4 insurance carriers
Dr. Wong is in network with 4 carriers, including Elevance, Kaiser Permanente and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 3. Check the plan with the practice before a visit.
- Elevance
- Kaiser Permanente
- Blue Cross Blue Shield of Massachusetts
- HCSC
Plan types Dr. Wong accepts, by number of carriers
- Medicare3
- PPO3
- HMO2
- POS2
- EPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. John Wong'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 services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| 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) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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 Dr. John Wong
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. John Wong's NPI number?
Dr. John Wong's NPI number is 1659336402. It was assigned on April 17, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John Wong?
Dr. John Wong is an internist in Upland, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. John Wong practice?
Dr. Wong practices at 1221 E Arrow Hwy, Upland, CA 91786. Dr. Wong's primary practice is Upland Rehabilitation & Care Center in Upland, California. Dmand AI also links Dr. Wong to 1 group practice or clinic and 1 medical group.
What is Dr. John Wong's office phone number?
The practice phone on file for Dr. Wong is (909) 985-1903.
What is Dr. John Wong's medical license number?
Dr. Wong holds California license A51406, one of the licenses on file in 2 states.
Which states has Dr. John Wong been licensed in?
Dmand AI has state licenses on file for Dr. Wong in California (1992 to 2026) and Oregon (1997 to 2017).
What medical group is Dr. John Wong part of?
Dr. Wong is linked to Southern California Permanente Medical Group. Dmand AI links Dr. Wong to 1 more medical group.
Does Dr. John Wong accept Medicare?
Yes. CMS data shows Dr. Wong billed Medicare for 79 services in 2016, and Dr. Wong accepts Medicare assignment.
Is Dr. John Wong board certified?
Yes. Dr. Wong is board certified in hospice and palliative medicine by the American Board of Internal Medicine.
What services does Dr. John Wong bill to Medicare?
In 2016, Dr. Wong's most billed Medicare services were medical service (99334).
Show 7 more questionsShow fewer questions
Where did Dr. John Wong go to medical school?
Dr. Wong graduated from McGill University Faculty of Medicine in 1991.
What drugs does Dr. John Wong prescribe most?
In 2024 Medicare Part D data, Dr. Wong's most prescribed drugs by claims were Hydrocodone-Acetaminophen, Atorvastatin Calcium and Humulin R.
Has Dr. John Wong received payments from drug or device companies?
CMS Open Payments shows $765 in general payments to Dr. Wong from 12 companies from 2016 to 2025. The largest total came from Otsuka America Pharmaceutical, Inc.
How long has Dr. John Wong been practicing?
Dr. Wong graduated from medical school in 1991, 35 years ago.
Does Dr. John Wong do research?
Dmand AI links 1 publication to Dr. Wong.
Who does Dr. John Wong publish with?
Dr. Wong's most frequent co-authors are Joshua Judah Ofman, MD (1 shared paper).
What insurance does Dr. John Wong accept?
Dr. Wong is in network with 4 carriers, including Elevance, Kaiser Permanente and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 3. Check the plan with the practice before a visit.
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