Physician Profile
Unclaimed ProfileAbout TSAI
Mark Chung-Hsun Tsai, M.D. is a healthcare provider in Paramount, CA specializing in internal medicine. Mark trained at University of Pittsburgh School of Medicine, graduating in 2001. Medicare claims data shows Mark provided 998 services to 561 patients.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Common questions
What does Dr. Tsai specialize in?
Dr. Tsai is an internal medicine in Paramount, CA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “INTERNAL MEDICINE”.
NPI registry
Where is Dr. Tsai located?
Dr. Tsai is listed at 16415 COLORADO AVE SUITE 101, Paramount, CA 90723. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Tsai's phone number?
The number on file is (562) 634-6341. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Tsai?
Dr. Tsai's National Provider Identifier is 1225033111. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Tsai go to medical school?
Dr. Tsai attended University of Pittsburgh School of Medicine, graduating in 2001. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Tsai have?
Dr. Tsai has 25 years experience. Calculated from a graduation year of 2001, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Tsai do most often?
According to Medicare billing data, Dr. Tsai provides treatments such as influenza vaccine, trivalent, split virus, preservative-free, 0.5 ml dosage and influenza vaccine, trivalent, 0.5 ml dosage, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Tsai's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Tsai. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (562) 634-6341
- Email not available
Practice Locations
16415 COLORADO AVE SUITE 101
Paramount, CA 90723
Procedures Most Often Billed to Medicare
998 services · 561 patients · 10 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Influenza vaccine, trivalent, split virus, preservative-free, 0.5 ml dosage | Treatment | 90656 |
30 |
| Influenza vaccine, trivalent, 0.5 ml dosage | Treatment | 90658 |
22 |
| Influenza vaccine split virus, preservative free | Treatment | 90662 |
13 |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
401 |
| Brief communication technology-based service, e.g. virtual check-in, by a physician or other qualified health care professional who can report evaluation and management services, provided to an established patient, not originating from a related e/m servi | Billing code | G2012 |
223 |
| Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more | Office visit | 99212 |
142 |
| Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | Billing code | G0439 |
68 |
| Administration of influenza virus vaccine | Billing code | G0008 |
64 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
24 |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
11 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
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Claim this profileRelated providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other internal medicines at this location 1
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 4
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 28 related providers in 4 groups
Other internal medicines in Paramount 4
Same specialty, same city.
Trained at University of Pittsburgh School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 2001 at University of Pittsburgh School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Influenza vaccine, trivalent, split virus, preservative-free, 0.5 ml dosage 8
Providers in CA who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.