Active NPI 1225033111 Individual Practitioner Male Practitioner

Dr. Mark Chung-Hsun Tsai , MD

Internal Medicine • Paramount, CA

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Mark Tsai, MD is a certified Internal Medicine practicing in Paramount, CA. With approximately 25 years of clinical experience since graduating from University Of Pittsburgh School Of Medicine in 2001, Dr. Tsai delivers high-quality medical care to the local community at 16415 COLORADO AVE.

Dr. Tsai accepts Medicare assignment.

Frequently performed procedures and clinical services include established patient outpatient office visit, 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 servic, annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

16415 Colorado Ave
Suite 101

Paramount, CA 907235035

Telephone 5626346341

Fax 5626348949

Associated Practice Facility / Clinic

🏢 Koung Y Chen Md, A Professional Corporation Facility NPI 1932309317

Medicare Profile & Education

Medical School

University Of Pittsburgh School Of Medicine

Graduation Year

2001

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Internal Medicine in Paramount, CA

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

25 Yrs -3.2 yrs vs City Avg

City Avg: 28.2 Yrs

State Avg: 26.6 Yrs

Regional Practice Density

8 Specialists

Practicing in Paramount, CA (18502 Statewide)

Telehealth Adoption Rate

12.5% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

29.9% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Tsai (25 Years) 25 Yrs

Paramount Specialty Average (28.2 Years) 28.2 Yrs

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2024)

Reporting Year:

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	401	167	$132.02	$98.51
G2012 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 servic	223	93	$20.00	$14.82
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	142	74	$125.56	$61.86
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	68	68	$210.59	$139.46
G0008 Administration of influenza virus vaccine	64	63	$30.00	$29.40
90656 Vaccine for influenza for administration into muscle, 0.5 ml dosage	30	29	$60.00	$21.90
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	24	21	$152.92	$138.42
90658 Influenza vaccine, trivalent, 0.5 ml dosage	22	22	$40.00	$21.42
90662 Influenza vaccine split virus, preservative free	13	13	$75.00	$73.50
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	11	11	$180.00	$120.22

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	388	154	$130.00	$98.54
G2012 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 servic	299	111	$20.00	$15.18
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	167	93	$120.00	$62.33
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	62	62	$210.00	$140.36
G0008 Administration of influenza virus vaccine	54	53	$30.00	$29.40
90688 Vaccine for influenza for administration into muscle, 0.5 ml dosage	36	36	$40.00	$20.46
93000 Routine ekg using at least 12 leads including interpretation and report	16	15	$50.00	$15.91
90662 Influenza vaccine split virus, preservative free	14	14	$75.00	$71.69
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	12	12	$150.00	$139.21

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	356	146	$123.85	$100.03
G2012 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 servic	254	108	$20.00	$15.54
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	160	73	$112.44	$62.74
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	63	63	$205.40	$144.39
G0008 Administration of influenza virus vaccine	50	48	$30.00	$29.42
90686 Vaccine for influenza for administration into muscle, 0.5 ml dosage	39	39	$40.00	$21.09
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	18	15	$150.00	$141.17

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	288	127	$106.32	$97.03
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	150	79	$92.53	$63.00
G2012 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 servic	90	53	$18.83	$15.63
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	57	57	$148.42	$134.37
G0008 Administration of influenza virus vaccine	50	50	$30.00	$19.19
90688 Vaccine for influenza for administration into muscle, 0.5 ml dosage	28	28	$40.00	$19.91
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	22	21	$124.55	$122.22
99238 Hospital discharge day management, 30 minutes or less	18	15	$101.67	$77.88
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	18	15	$167.78	$145.27
90662 Influenza vaccine split virus, preservative free	16	16	$65.00	$65.00
93000 Routine ekg using at least 12 leads including interpretation and report	12	11	$50.00	$16.58

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	231	123	$80.00	$79.87
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	136	73	$70.00	$50.94
G2012 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 servic	73	53	$15.00	$14.96
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	65	13	$80.00	$78.25
G0008 Administration of influenza virus vaccine	54	53	$30.00	$18.95
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	44	44	$130.00	$128.72
90688 Vaccine for influenza for administration into muscle, 0.5 ml dosage	36	35	$30.00	$19.12
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	29	29	$160.00	$119.28
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	18	18	$160.00	$148.97
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	17	17	$100.00	$99.88
90662 Influenza vaccine split virus, preservative free	17	17	$65.00	$60.98
99238 Hospital discharge day management, 30 minutes or less	15	15	$90.00	$79.75

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	272	88	$70.00	$50.19
99213 Established patient office or other outpatient visit, typically 15 minutes	186	94	$80.00	$78.89
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	124	30	$80.00	$77.42
99308 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes	104	12	$80.00	$74.26
G0008 Administration of influenza virus vaccine	48	48	$30.00	$18.58
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	46	38	$160.00	$145.56
99238 Hospital discharge day management, 30 minutes or less	43	36	$90.00	$78.53
90688 Vaccine for influenza for administration into muscle, 0.5 ml dosage	40	40	$30.00	$17.48
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	36	36	$130.00	$127.45
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	14	14	$100.00	$98.99

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	237	114	$80.00	$78.04
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	195	71	$70.00	$47.40
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	112	40	$80.00	$75.52
99308 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes	99	13	$80.00	$72.72
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	55	48	$160.00	$141.49
99238 Hospital discharge day management, 30 minutes or less	49	44	$90.00	$76.52
G0008 Administration of influenza virus vaccine	45	45	$30.00	$23.13
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	36	32	$100.00	$99.05
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	35	35	$130.00	$125.23
90686 Vaccine for influenza for administration into muscle, 0.5 ml dosage	27	27	$40.00	$18.65
90662 Influenza vaccine split virus, preservative free	18	18	$30.00	$29.40
36415 Insertion of needle into vein for collection of blood sample	18	16	$15.00	$2.94

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	199	101	$80.00	$77.75
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	182	74	$70.00	$46.83
36415 Insertion of needle into vein for collection of blood sample	81	69	$15.00	$2.94
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	47	17	$80.00	$74.77
G0008 Administration of influenza virus vaccine	46	46	$30.00	$28.74
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	41	37	$100.00	$98.72
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	36	36	$130.00	$123.31
90662 Influenza vaccine split virus, preservative free	26	26	$30.00	$29.40
90686 Vaccine for influenza for administration into muscle, 0.5 ml dosage	19	19	$40.00	$18.65
99238 Hospital discharge day management, 30 minutes or less	19	18	$90.00	$75.73
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	18	17	$160.00	$141.81

Medical Specialties & State Licenses

Internal Medicine Primary Specialty

NUCC Taxonomy Code: 207R00000X

State License CA A81875

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

Additional State Medicaid & Healthcare Payer Identifiers

Commercial Insurance / Payer ID California License

A81875 (CA)

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

1 Associated Practitioners

Dr. Koung Chen , MD

General Practice

NPI 1679575336

Doctor of Medicine (M.D.)

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

11 Historical Events

✅

NPI Profile Active April 03, 2017

NPI status registered as active in NPPES database

📍

Updated Practice Location April 03, 2017

Registered at 16415 COLORADO AVE, SUITE 101, PARAMOUNT, CA 907235035 (Tel: 5626346341)

📍

Updated Business Mailing Address April 03, 2017

Registered at 16415 COLORADO AVE, SUITE 101, PARAMOUNT, CA 907235035 (Tel: 5626346341)

👤

Provider Name / Credentials Updated April 03, 2017

Recorded as MARK TSAI, M.D.

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) April 03, 2017

Internal Medicine (License #A81875 in CA)

✅

NPI Profile Active July 08, 2007

NPI status registered as active in NPPES database

📍

Updated Practice Location July 08, 2007

Registered at 16415 COLORADO AVE, STE 101, PARAMOUNT, CA 907235051 (Tel: 5626346341)

📍

Updated Business Mailing Address July 08, 2007

Registered at 12152 BARTLETT ST, GARDEN GROVE, CA 928451526 (Tel: 3108973697)

👤

Provider Name / Credentials Updated July 08, 2007

Recorded as MARK TSAI, M.D.

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) July 08, 2007

Internal Medicine (License #A81875 in CA)

🟢

Initial NPI Registration & Enumeration June 16, 2005

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1225033111

Entity Type:

Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)

Enumeration Date: June 16, 2005

Last Update: April 03, 2017

Sole Proprietor: Yes

Update or Correct Profile

Mailing Address

16415 Colorado Ave, Suite 101

Paramount, CA 907235035

Phone: 5626346341

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).

⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.