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Dr. Christopher W. Tjoa, MD
NPI1528266137
- Part D claims, 2022
- 11
- Publications
- 9
- Industry payments
- $703
- Insurance carriers
- 2
- State licenses
- 15
- Practice address
- 3400 Spruce St, Philadelphia, PA 19104-4238
- Practice phone
- Call (215) 349-8222
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Tjoa'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. Christopher W. Tjoa is a psychiatrist in Philadelphia, Pennsylvania
Dr. Tjoa practices in Philadelphia, Pennsylvania.
Dr. Tjoa's NPI, 1528266137, was assigned on July 5, 2007. Dr. Tjoa graduated from Jacobs School of Medicine and Biomedical Sciences in 2007. Dr. Tjoa's Pennsylvania license number on file is MD437793.
NPI and contact details
- NPI
- 1528266137NPI Registry (opens in a new tab)
- NPI enumeration date
- July 5, 2007
- NPI status
- Active
- Practice phone
- (215) 349-8222
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Medical school graduation
- 2007
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dr. Christopher W. Tjoa's practice address is in Philadelphia, Pennsylvania
Dr. Tjoa's practice address in the NPI Registry is 3400 Spruce St, Philadelphia, PA 19104-4238. The practice phone is (215) 349-8222.
- NPI Registry address3400 Spruce St, Philadelphia, PA 19104-4238Phone(215) 349-8222
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. Christopher W. Tjoa's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Tjoa practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dr. Tjoa's practice | Available with a free account |
Source: Dmand AI Technology Install Data
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See the EHR and IT leaders at every site where Dr. Tjoa practices
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Dr. Christopher W. Tjoa is one of 1,873 psychiatrists in Pennsylvania
Psychiatry is Dr. Tjoa's primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Dr. Tjoa is board certified in psychiatry by the American Board of Psychiatry and Neurology. Dmand AI has Dr. Tjoa's licenses on file in 15 states: Pennsylvania, Arkansas, Florida, Washington, Georgia, Missouri, North Carolina, Virginia, California, Indiana, New Jersey, Nevada, Texas, New Mexico and South Carolina.
Specialties and state licenses
- Psychiatry, PennsylvaniaPrimary
- Arkansas license
- Florida license
- Washington license
- Georgia license
- Missouri license
- North Carolina license
- Virginia license
- California license
- Indiana license
- New Jersey license
- Nevada license
- Texas license
- New Mexico license
- South Carolina license
Psychiatrists near Dr. Tjoa
Counts of psychiatrists 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. Christopher W. Tjoa wrote 11 Medicare Part D claims in 2022
In 2022, Dr. Tjoa wrote 11 Medicare Part D claims. They cover 1 drug, with $232 in total drug cost. In 2021, CMS named 13 claims across 1 drug.
Part D claims, 202211
Drugs named by CMS1
Total drug cost$232
Dr. Tjoa's most prescribed drugs by claims, 2022
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2021 to 2022
- 2021
- 2022
- Claims for drugs CMS names
- 2021: 132022: 1115%
Drugs named by CMS: 1 in 2022, 1 in 2021.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Find psychiatrists like Dr. Tjoa by procedure volume and prescribing
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Dr. Christopher W. Tjoa has 9 publications on record
Dmand AI links 9 papers to Dr. Tjoa, published from 2011 to 2022. 2022 was the busiest year, with 2. The most frequent topics are Brain, Magnetic Resonance Imaging and Analgesics, Opioid. Dr. Tjoa's most frequent co-authors are Srinivas Reddy Puli, MD and Kyle M. Kampman, MD.
Papers9
Years published2011 to 2022
Dr. Tjoa's papers by year, 2011 to 2022
Topics Dr. Tjoa writes about most
- Brain
- Magnetic Resonance Imaging
- Analgesics, Opioid
- Atrophy
- Brain Mapping
- Image Processing, Computer-Assisted
- Multiple Sclerosis
- Regression Analysis
Dr. Tjoa's most frequent co-authors
Recent publications by Dr. Tjoa
Am J Manag Care
Analgesics, OpioidInappropriate PrescribingManaged Care Programs
AlgorithmsBrainBrain Mapping
See who Dr. Tjoa researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Tjoa works with, so you can find a warm path to the right psychiatrists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Christopher W. Tjoa received $703 in industry payments from 2023 to 2025
CMS Open Payments shows 6 general payments to Dr. Tjoa from 6 drug and device companies from 2023 to 2025. Food and beverage make up the largest share, 100% of the total. AstraZeneca Pharmaceuticals LP paid the most, $130.
General payments to Dr. Tjoa by program year, 2023 to 2025
Companies that paid Dr. Tjoa the most, 2023 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Christopher W. Tjoa graduated from Jacobs School of Medicine and Biomedical Sciences
Dr. Tjoa graduated from Jacobs School of Medicine and Biomedical Sciences in 2007.
- Medical school
- Board certified in psychiatry
Source: Dmand AI Professional Profile Data
Dr. Christopher W. Tjoa accepts plans from 2 insurance carriers
Dr. Tjoa is in network with 2 carriers, including Aetna and DE State Medicaid. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Aetna
- DE State Medicaid
Plan types Dr. Tjoa accepts, by number of carriers
- EPO1
- HMO1
- Medicaid1
- Medicare1
- POS1
- PPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. Christopher W. Tjoa'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (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. Christopher W. Tjoa
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. Christopher W. Tjoa's NPI number?
Dr. Christopher W. Tjoa's NPI number is 1528266137. It was assigned on July 5, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Christopher W. Tjoa?
Dr. Christopher W. Tjoa is a psychiatrist in Philadelphia, Pennsylvania. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Dr. Christopher W. Tjoa practice?
Dr. Tjoa practices at 3400 Spruce St, Philadelphia, PA 19104-4238.
What is Dr. Christopher W. Tjoa's office phone number?
The practice phone on file for Dr. Tjoa is (215) 349-8222.
What is Dr. Christopher W. Tjoa's medical license number?
Dr. Tjoa's Pennsylvania license number on file is MD437793, one of the licenses on file in 15 states.
Which states has Dr. Christopher W. Tjoa been licensed in?
Dmand AI has state licenses on file for Dr. Tjoa in Pennsylvania (2007 to 2024), Arkansas (2022 to 2027), Florida (2023 to 2027), Washington (2024 to 2027), Georgia (2023 to 2026), Missouri (2023 to 2026), North Carolina (2022 to 2026), Virginia (2022 to 2026), California (2023 to 2025), Indiana (2022 to 2025), New Jersey (2022 to 2025), Nevada (2024 to 2025), Texas (2024 to 2025), New Mexico (2023 to 2024) and South Carolina (2022 to 2023).
Is Dr. Christopher W. Tjoa board certified?
Yes. Dr. Tjoa is board certified in psychiatry by the American Board of Psychiatry and Neurology.
Where did Dr. Christopher W. Tjoa go to medical school?
Dr. Tjoa graduated from Jacobs School of Medicine and Biomedical Sciences in 2007.
What drugs does Dr. Christopher W. Tjoa prescribe most?
In 2022 Medicare Part D data, Dr. Tjoa's most prescribed drugs by claims were Dextroamphetamine-Amphetamine.
Has Dr. Christopher W. Tjoa received payments from drug or device companies?
CMS Open Payments shows $703 in general payments to Dr. Tjoa from 6 companies from 2023 to 2025. The largest total came from AstraZeneca Pharmaceuticals LP.
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How long has Dr. Christopher W. Tjoa been practicing?
Dr. Tjoa graduated from medical school in 2007, 19 years ago.
Does Dr. Christopher W. Tjoa do research?
Dmand AI links 9 publications to Dr. Tjoa, published from 2011 to 2022.
Who does Dr. Christopher W. Tjoa publish with?
Dr. Tjoa's most frequent co-authors are Srinivas Reddy Puli, MD (2 shared papers) and Kyle M. Kampman, MD (1 shared paper).
What insurance does Dr. Christopher W. Tjoa accept?
Dr. Tjoa is in network with 2 carriers, including Aetna and DE State Medicaid. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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