Dr. Tammy T. Chen, MD
- Medicare services, 2024
- 530
- Medicare patients, 2024
- 83
- Part D claims, 2024
- 4,189
- Industry payments
- $7,543
- Affiliated sites
- 1
- Practice address
- 2424 India Hook Rd, Rock Hill, SC 29732-2784
- Practice phone
- Call (803) 328-8255
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Southern Psychiatric Practice
Physician office · Rock Hill, South Carolina
Find Dr. Chen's professional email, personal email and mobile number
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Dr. Tammy T. Chen is a psychiatrist in Rock Hill, South Carolina
Dr. Chen practices at Southern Psychiatric Practice in Rock Hill, South Carolina.
Dr. Chen's NPI, 1013055706, was assigned on February 2, 2007. Dr. Chen graduated from Tulane University School of Medicine in 2001. Dr. Chen holds South Carolina license 31361.
- NPI
- 1013055706NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4880647668
- NPI enumeration date
- February 2, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (803) 328-8255
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 51
- Medical school graduation
- 2001
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Tammy T. Chen practices at Southern Psychiatric Practice in Rock Hill, South Carolina
Dr. Chen's primary practice is Southern Psychiatric Practice, at 2424 India Hook Rd, Rock Hill, SC 29732-2784. The practice phone is (803) 328-8255.
- Southern Psychiatric Practice2424 India Hook Rd, Rock Hill, SC 29732-2784Phone(803) 328-8255
Source: Dmand AI Affiliation Data
Dr. Tammy T. Chen is affiliated with 1 site of care
Dr. Chen's primary practice is Southern Psychiatric Practice in Rock Hill, South Carolina.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Tammy T. Chen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chen practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Southern Psychiatric Practice | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Tammy T. Chen is one of 630 psychiatrists in South Carolina
Psychiatry is Dr. Chen's primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Dr. Chen is licensed in South Carolina.
Specialties and state licenses
- Psychiatry, South CarolinaPrimary
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. Tammy T. Chen billed Medicare for 530 services in 2024
CMS data shows 530 Medicare services from Dr. Chen across 3 procedure codes in 2024, for 83 Medicare patients. Medicare paid $42,379 for them. Every service was in an office.
Dr. Chen's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 3422024: 26523%
- Office and hospital visits
- 2023: 3552024: 26525%
Dr. Chen compared with the South Carolina median for psychiatrists, 2024
- Dr. Chen
- South Carolina median
- Medicare services
- 530vs 1294.1 times
- Medicare patients
- 83vs 4969% above
- Part D claims
- 4,085vs 16824.3 times
Medians across 616 psychiatrists in South Carolina 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 South Carolina.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Tammy T. Chen treated 83 Medicare patients in 2024, average age 69
CMS counts 83 Medicare patients who saw Dr. Chen in 2024. The largest group is 65 to 74, with 41 patients. 75% of them have anxiety, and 75% have depression. 16% are also on Medicaid. Their average risk score is 1.10, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Chen's median patient age at 63, with 77% 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
- Women6882%
- Men1518%
Chronic conditions among Dr. Chen's Medicare patients, 2024
- Anxiety75%
- Depression75%
- High cholesterol75%
- Mood disorders75%
- High blood pressure61%
- Arthritis48%
- ADHD and conduct disorders37%
- Diabetes20%
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 63
Patient panel by sex, all payers
- Women77%
- Men21%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Tammy T. Chen wrote 4,189 Medicare Part D claims in 2024
In 2024, Dr. Chen wrote 4,189 Medicare Part D claims for 193 patients. 90% of them were for generic drugs. CMS names the drug for 4,085 of them, across 66 drugs with 11 or more claims each, at $640,668 in total drug cost. In 2023, CMS named 4,365 claims across 67 drugs.
Dr. Chen's Part D claims by kind of drug, 2024
- Generic3,779 claims90%
- Brand-name410 claims10%
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 over4%187 of 4,189 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: 4,3652024: 4,0856%
Drugs named by CMS: 66 in 2024, 67 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. Tammy T. Chen takes part in Medicare
Dr. Chen 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. Tammy T. Chen received $7,543 in industry payments from 2016 to 2025
CMS Open Payments shows 551 general payments to Dr. Chen from 29 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 91% of the total. Abbvie Inc. paid the most, $1,125.
General payments to Dr. Chen by program year, 2016 to 2025
General payments to Dr. Chen by kind, 2016 to 2025
- Food and beverage$6,88991%
- Education$3545%
- Speaker and faculty fees$1502%
- Consulting fees$1502%
Companies that paid Dr. Chen 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. Tammy T. Chen graduated from Tulane University School of Medicine
Dr. Chen graduated from Tulane University School of Medicine in 2001.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Tammy T. 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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation 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. Tammy T. 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. Tammy T. Chen's NPI number?
Dr. Tammy T. Chen's NPI number is 1013055706. It was assigned on February 2, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Tammy T. Chen?
Dr. Tammy T. Chen is a psychiatrist in Rock Hill, South Carolina. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Dr. Tammy T. Chen practice?
Dr. Chen practices at 2424 India Hook Rd, Rock Hill, SC 29732-2784. Dr. Chen's primary practice is Southern Psychiatric Practice in Rock Hill, South Carolina.
What is Dr. Tammy T. Chen's office phone number?
The practice phone on file for Dr. Chen is (803) 328-8255.
What is Dr. Tammy T. Chen's medical license number?
Dr. Chen holds South Carolina license 31361.
Does Dr. Tammy T. Chen accept Medicare?
Yes. CMS data shows Dr. Chen billed Medicare for 530 services in 2024, and Dr. Chen accepts Medicare assignment.
How many Medicare patients does Dr. Tammy T. Chen see?
CMS counts 83 Medicare patients who saw Dr. Chen in 2024, with an average age of 69.
What services does Dr. Tammy T. Chen bill to Medicare?
In 2024, Dr. Chen's most billed Medicare services were office visit, established patient (99214), psychiatric service (90838) and psychiatric service (90836).
Where did Dr. Tammy T. Chen go to medical school?
Dr. Chen graduated from Tulane University School of Medicine in 2001.
What drugs does Dr. Tammy T. Chen prescribe most?
In 2024 Medicare Part D data, Dr. Chen's most prescribed drugs by claims were Alprazolam, Clonazepam and Dextroamphetamine-Amphetamine.
Has Dr. Tammy T. Chen received payments from drug or device companies?
CMS Open Payments shows $7,543 in general payments to Dr. Chen from 29 companies from 2016 to 2025. The largest total came from Abbvie Inc.
How long has Dr. Tammy T. Chen been practicing?
Dr. Chen graduated from medical school in 2001, 25 years ago.
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