Dr. Garwen Chen, MD
- Medicare services, 2024
- 378
- Medicare patients, 2024
- 81
- Part D claims, 2024
- 477
- Hospital affiliations
- 2
- Industry payments
- $417
- Practice address
- 10010 Kennerly Rd, Saint Louis, MO 63128
- Practice phone
- Call (314) 525-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Mercy Hospital South - Hyland Behavioral Health Center
Saint Louis, Missouri
Find Dr. Chen'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. Garwen Chen is a psychiatrist in Saint Louis, Missouri
Dr. Chen practices at Mercy Hospital South - Hyland Behavioral Health Center in Saint Louis, Missouri.
Dr. Chen's NPI, 1972959617, was assigned on May 12, 2016. Dr. Chen graduated from University of Alabama School of Medicine in 2016. Dr. Chen holds Missouri license 2020042681.
- NPI
- 1972959617NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1850627001
- NPI enumeration date
- May 12, 2016
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (314) 525-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 36
- Medical school graduation
- 2016
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Garwen Chen practices at Mercy Hospital South - Hyland Behavioral Health Center in Saint Louis, Missouri
Dr. Chen's primary practice is Mercy Hospital South - Hyland Behavioral Health Center, at 10010 Kennerly Rd, Saint Louis, MO 63128 in Saint Louis County. The practice phone is (314) 525-1000.
- Mercy Hospital South - Hyland Behavioral Health Center10010 Kennerly Rd, Saint Louis, MO 63128 · Saint Louis CountyPhone(314) 525-1000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Garwen Chen is affiliated with 4 sites of care and 6 medical groups
Dr. Chen's primary practice is Mercy Hospital South - Hyland Behavioral Health Center in Saint Louis, Missouri. Dr. Chen is also affiliated with Kindred Hospital St. Louis South. The medical group on file is Mercy Clinic South Hospitalists. Dmand AI also links Dr. Chen to 1 more hospital, 5 medical groups and 1 group practice or clinic, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Garwen Chen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chen practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mercy Hospital South - Hyland Behavioral Health Center | Available with a free account |
| +3 more sites and 5 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Garwen Chen is one of 679 psychiatrists in Missouri
Psychiatry is Dr. Chen's primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Dmand AI has Dr. Chen's licenses on file in 3 states: Missouri, Kentucky and Oklahoma.
Specialties and state licenses
- Psychiatry, MissouriPrimary
- Kentucky license
- Oklahoma license
Psychiatrists near Dr. Chen
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. Garwen Chen billed Medicare for 378 services in 2024
CMS data shows 378 Medicare services from Dr. Chen across 4 procedure codes in 2024, for 81 Medicare patients. Medicare paid $27,656 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Chen's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2302024: 37864%
Dr. Chen compared with the Missouri median for psychiatrists, 2024
- Dr. Chen
- Missouri median
- Medicare services
- 378vs 1332.8 times
- Medicare patients
- 81vs 4965% above
- Part D claims
- 298vs 295Close to median
Medians across 752 psychiatrists in Missouri with Dmand AI profiles that report each measure.
Dr. Chen's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chen and other psychiatrists in Missouri.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Garwen Chen treated 81 Medicare patients in 2024, average age 55
CMS counts 81 Medicare patients who saw Dr. Chen in 2024. The largest group is under 65, with 50 patients. 75% of them have anxiety, and 75% have depression. 64% are also on Medicaid. Their average risk score is 1.61, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Chen's median patient age at 41, with 58% women.
Dr. Chen's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Chen's Medicare patients by sex, 2024
- Women3847%
- Men4353%
Chronic conditions among Dr. Chen's Medicare patients, 2024
- Anxiety75%
- Depression75%
- Mood disorders75%
- Schizophrenia and other psychoses75%
- High blood pressure69%
- Bipolar disorder67%
- High cholesterol63%
- Alcohol and drug use disorders57%
Share of Medicare patients with each condition. A patient can have several.
Dr. Chen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 41
Patient panel by sex, all payers
- Women58%
- Men42%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Garwen Chen wrote 477 Medicare Part D claims in 2024
In 2024, Dr. Chen wrote 477 Medicare Part D claims for 108 patients. 95% of them were for generic drugs. CMS names the drug for 298 of them, across 17 drugs with 11 or more claims each, at $4,950 in total drug cost. In 2023, CMS named 136 claims across 8 drugs.
Dr. Chen's Part D claims by kind of drug, 2024
- Generic453 claims95%
- Brand-name and other24 claims5%
Dr. Chen'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. Chen's Part D claims, 2024
- Antipsychotics, patients 65 and over5%26 of 477 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: 1362024: 298119%
Drugs named by CMS: 17 in 2024, 8 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
Dr. Garwen Chen offers telehealth to Medicare patients
Dr. Chen accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Chen as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Garwen Chen received $417 in industry payments from 2018 to 2019
CMS Open Payments shows 9 general payments to Dr. Chen from 2 drug and device companies from 2018 to 2019. Food and beverage make up the largest share, 100% of the total. Otsuka America Pharmaceutical, Inc. paid the most, $388.
General payments to Dr. Chen by program year, 2018 to 2019
Companies that paid Dr. Chen the most, 2018 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Garwen Chen graduated from University of Alabama School of Medicine
Dr. Chen graduated from University of Alabama School of Medicine in 2016.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Garwen Chen'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 |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand 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 DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| 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) |
| 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 Dr. Garwen Chen
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. Garwen Chen's NPI number?
Dr. Garwen Chen's NPI number is 1972959617. It was assigned on May 12, 2016, and it is active in the NPI Registry.
What kind of doctor is Dr. Garwen Chen?
Dr. Garwen Chen is a psychiatrist in Saint Louis, Missouri. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Dr. Garwen Chen practice?
Dr. Chen practices at 10010 Kennerly Rd, Saint Louis, MO 63128. Dr. Chen's primary practice is Mercy Hospital South - Hyland Behavioral Health Center in Saint Louis, Missouri. Dmand AI also links Dr. Chen to 1 hospital, 5 medical groups and 1 group practice or clinic.
What is Dr. Garwen Chen's office phone number?
The practice phone on file for Dr. Chen is (314) 525-1000.
What is Dr. Garwen Chen's medical license number?
Dr. Chen holds Missouri license 2020042681, one of the licenses on file in 3 states.
Which states has Dr. Garwen Chen been licensed in?
Dmand AI has state licenses on file for Dr. Chen in Missouri, Kentucky and Oklahoma.
Which hospitals is Dr. Garwen Chen affiliated with?
Dr. Chen is affiliated with Kindred Hospital St. Louis South. Dmand AI links Dr. Chen to 1 more hospital.
What medical group is Dr. Garwen Chen part of?
Dr. Chen is linked to Mercy Clinic South Hospitalists. Dmand AI links Dr. Chen to 5 more medical groups.
Does Dr. Garwen Chen accept Medicare?
Yes. CMS data shows Dr. Chen billed Medicare for 378 services in 2024, and Dr. Chen accepts Medicare assignment.
Does Dr. Garwen Chen offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Chen as offering telehealth services.
Show 6 more questionsShow fewer questions
How many Medicare patients does Dr. Garwen Chen see?
CMS counts 81 Medicare patients who saw Dr. Chen in 2024, with an average age of 55.
What services does Dr. Garwen Chen bill to Medicare?
In 2024, Dr. Chen's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99223) and hospital inpatient care (99239).
Where did Dr. Garwen Chen go to medical school?
Dr. Chen graduated from University of Alabama School of Medicine in 2016.
What drugs does Dr. Garwen Chen prescribe most?
In 2024 Medicare Part D data, Dr. Chen's most prescribed drugs by claims were Levothyroxine Sodium, Olanzapine and Trazodone HCl.
Has Dr. Garwen Chen received payments from drug or device companies?
CMS Open Payments shows $417 in general payments to Dr. Chen from 2 companies from 2018 to 2019. The largest total came from Otsuka America Pharmaceutical, Inc.
How long has Dr. Garwen Chen been practicing?
Dr. Chen graduated from medical school in 2016, 10 years ago.
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