Active NPI 1326136854 Individual Practitioner Male Practitioner

Dr. Tommy Ho-Yin Chen , MD

Dermatology • Pasadena, CA

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Tommy Chen, MD is a certified Dermatology practicing in Pasadena, CA. With approximately 52 years of clinical experience since graduating from Emory University School Of Medicine in 1974, Dr. Chen delivers high-quality medical care to the local community at 50 BELLEFONTAINE ST.

Dr. Chen accepts Medicare assignment.

Frequently performed procedures and clinical services include established patient outpatient office visit, destruction of precancer skin growth, destruction of up to 14 skin growths. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

50 Bellefontaine St
#301

Pasadena, CA 911053132

Telephone 6267934857

Fax 6267938812

Associated Practice Facility / Clinic

🏢 Fairmont Pharmacy Llc Facility NPI 1043249105

Medicare Profile & Education

Medical School

Emory University School Of Medicine

Graduation Year

1974

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Dermatology in Pasadena, CA

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

52 Yrs +28.0 yrs vs City Avg

City Avg: 24.0 Yrs

State Avg: 24.9 Yrs

Regional Practice Density

22 Specialists

Practicing in Pasadena, CA (2182 Statewide)

Telehealth Adoption Rate

13.6% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

26.9% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Chen (52 Years) 52 Yrs

Pasadena Specialty Average (24.0 Years) 24.0 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	200	107	$120.28	$92.27
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	66	47	$153.94	$129.48
17004 Destruction of precancer skin growth, 15 or more growths	65	32	$230.00	$174.98
17110 Destruction of up to 14 skin growths	45	37	$200.00	$117.74
11102 Tangential biopsy of single skin lesion	43	31	$130.00	$102.21
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	33	33	$160.91	$113.85
11103 Biopsy of related skin growth, each additional growth	15	13	$74.67	$52.16
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	13	13	$203.85	$168.98
11104 Punch biopsy, first skin growth	11	11	$200.00	$124.97

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	312	144	$119.94	$98.37
17004 Destruction of precancer skin growth, 15 or more growths	107	50	$229.72	$191.36
11102 Tangential biopsy of single skin lesion	71	57	$130.00	$110.76
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	54	54	$157.22	$121.63
17110 Destruction of up to 14 skin growths	40	30	$197.50	$126.37
11103 Biopsy of related skin growth, each additional growth	29	20	$72.41	$57.28
17000 Destruction of skin growth	14	12	$101.43	$62.18
11104 Punch biopsy, first skin growth	11	11	$200.00	$137.63

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	330	164	$110.06	$99.76
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	225	13	$69.71	$62.62
17004 Destruction of precancer skin growth, 15 or more growths	97	47	$230.46	$193.73
11102 Tangential biopsy of single skin lesion	78	64	$130.06	$110.63
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	60	60	$150.00	$123.25
17110 Destruction of up to 14 skin growths	51	39	$199.61	$125.23
11103 Biopsy of related skin growth, each additional growth	19	12	$70.00	$59.08
17000 Destruction of skin growth	18	14	$107.22	$63.66
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	17	15	$178.24	$139.60
11104 Punch biopsy, first skin growth	13	13	$200.00	$141.77

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	390	191	$107.23	$99.97
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	347	17	$66.95	$61.74
17004 Destruction of precancer skin growth, 15 or more growths	120	50	$229.33	$190.37
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	79	79	$151.65	$124.38
17003 Destruction of precancer skin growth, 2-14 growths	72	17	$11.07	$7.10
17110 Destruction of up to 14 skin growths	65	53	$192.31	$123.35
11102 Tangential biopsy of single skin lesion	63	52	$128.73	$112.69
17000 Destruction of skin growth	33	23	$100.30	$65.38
11104 Punch biopsy, first skin growth	20	18	$199.00	$147.84
11103 Biopsy of related skin growth, each additional growth	14	12	$65.71	$58.86
12032 Intermediate repair of wound of scalp, underarms, trunk, arms, or legs, 2.6-7.5 cm	12	11	$387.50	$341.65
10060 Simple or single drainage of skin abscess	11	11	$213.64	$134.71

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	345	183	$89.91	$81.75
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	263	13	$55.00	$50.98
17004 Destruction of precancer skin growth, 15 or more growths	74	44	$230.00	$181.12
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	72	72	$150.00	$119.48
11102 Tangential biopsy of single skin lesion	67	57	$130.00	$98.12
17110 Destruction of up to 14 skin growths	50	45	$198.60	$123.24
11104 Punch biopsy, first skin growth	21	20	$204.76	$145.28
17000 Destruction of skin growth	17	15	$108.24	$61.09
11103 Biopsy of related skin growth, each additional growth	13	11	$64.62	$58.43

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	413	212	$90.17	$81.36
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	320	22	$55.09	$50.10
96910 Skin application of tar and ultraviolet B or petrolatum and ultraviolet B	302	12	$150.00	$134.92
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	115	115	$149.48	$118.37
11102 Tangential biopsy of single skin lesion	85	72	$133.12	$104.51
17004 Destruction of precancer skin growth, 15 or more growths	75	43	$230.00	$168.07
17003 Destruction of precancer skin growth, 2-14 growths	71	18	$13.49	$6.32
17110 Destruction of up to 14 skin growths	49	39	$190.61	$110.86
11104 Punch biopsy, first skin growth	44	40	$195.00	$135.02
17000 Destruction of skin growth	42	30	$104.64	$64.46
12032 Intermediate repair of wound of scalp, underarms, trunk, arms, or legs, 2.6-7.5 cm	18	12	$370.00	$342.83
11103 Biopsy of related skin growth, each additional growth	15	13	$86.00	$59.77
10060 Simple or single drainage of skin abscess	12	12	$187.50	$124.26

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	461	243	$89.95	$75.82
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	246	25	$55.00	$46.05
11100 Biopsy of single growth of skin and/or tissue	158	119	$129.87	$106.78
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	107	107	$150.00	$111.83
88305 Pathology examination of tissue using a microscope, intermediate complexity	102	63	$71.27	$40.27
17004 Destruction of precancer skin growth, 15 or more growths	92	54	$230.00	$152.76
17110 Destruction of up to 14 skin growths	71	59	$194.93	$117.27
11101 Biopsy of each additional growth of skin and/or tissue	42	33	$50.00	$33.80
17000 Destruction of skin growth	39	33	$109.23	$62.78
17003 Destruction of precancer skin growth, 2-14 growths	34	15	$15.53	$5.55
12032 Intermediate repair of wound of scalp, underarms, trunk, arms, or legs, 2.6-7.5 cm	13	12	$364.62	$319.32
10060 Simple or single drainage of skin abscess	13	12	$203.85	$125.45

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	465	249	$90.26	$77.31
88305 Pathology examination of tissue using a microscope, intermediate complexity	247	128	$70.34	$40.63
11100 Biopsy of single growth of skin and/or tissue	188	147	$130.27	$106.19
96910 Skin application of tar and ultraviolet B or petrolatum and ultraviolet B	167	11	$94.97	$79.94
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	158	29	$55.82	$46.54
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	157	157	$150.00	$114.23
17110 Destruction of up to 14 skin growths	88	61	$197.61	$121.17
17004 Destruction of precancer skin growth, 15 or more growths	83	50	$229.64	$161.61
17003 Destruction of precancer skin growth, 2-14 growths	69	24	$13.81	$6.10
17000 Destruction of skin growth	55	44	$107.45	$60.81
11101 Biopsy of each additional growth of skin and/or tissue	53	35	$52.83	$34.57
J3301 Injection, triamcinolone acetonide, not otherwise specified, 10 mg	34	12	$6.76	$1.80
88304 Pathology examination of tissue using a microscope, moderately low complexity	27	11	$28.89	$13.70
12032 Intermediate repair of wound of scalp, underarms, trunk, arms, or legs, 2.6-7.5 cm	22	19	$370.00	$312.67
10060 Simple or single drainage of skin abscess	20	16	$191.25	$119.34

Medical Specialties & State Licenses

Dermatology Primary Specialty

NUCC Taxonomy Code: 207N00000X

State License CA C37340

A dermatologist is trained to diagnose and treat pediatric and adult patients with benign and malignant disorders of the skin, mouth, external genitalia, hair and nails, as well as a number of sexually transmitted diseases. The dermatologist has had additional training and experience in the diagnosis and treatment of skin cancers, melanomas, moles and other tumors of the skin, the management of contact dermatitis and other allergic and nonallergic skin disorders, and in the recognition of the skin manifestations of systemic (including internal malignancy) and infectious diseases. Dermatologists have special training in dermatopathology and in the surgical techniques used in dermatology. They also have expertise in the management of cosmetic disorders of the skin such as hair loss and scars and the skin changes associated with aging.

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid State Provider ID

00C373400 (CA)

Practice Associates & Co-Workers

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

18 Associated Practitioners

Dr. Robert Boardman , MD

Specialist

NPI 1013013481

Doctor of Medicine (M.D.)

Dr. Reiko Russin , MD

Psychiatry & Neurology - Neurology

NPI 1134105331

Doctor of Medicine (M.D.)

Dr. Robert Loitz , MD

Pediatrics - Pediatric Cardiology

NPI 1225010077

Doctor of Medicine (M.D.)

Dr. Gerilynn Okamoto , DDS

Dentist

NPI 1255317954

Doctor of Dental Surgery

Dr. Elizabeth Deoliveira , MD

Pediatrics - Pediatric Cardiology

NPI 1265414833

Doctor of Medicine (M.D.)

Dr. Gustavo Calleros , MD

Family Medicine

NPI 1346358827

Doctor of Medicine (M.D.)

Career & Practice History Timeline

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

6 Historical Events

✅

NPI Profile Active April 24, 2008

NPI status registered as active in NPPES database

📍

Updated Practice Location April 24, 2008

Registered at 50 BELLEFONTAINE ST, #301, PASADENA, CA 911053132 (Tel: 6267934857)

📍

Updated Business Mailing Address April 24, 2008

Registered at 50 BELLEFONTAINE ST, #301, PASADENA, CA 911053132 (Tel: 6267934857)

👤

Provider Name / Credentials Updated April 24, 2008

Recorded as TOMMY CHEN, M.D.

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) April 24, 2008

Dermatology (License #C37340 in CA)

🟢

Initial NPI Registration & Enumeration October 10, 2006

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

0 Reviews

No patient reviews submitted yet for Dr. Tommy Chen. Be the first to share your experience!

Only verified registered users can submit ratings, post feedback, and upload facility photos.

NPI Administrative Meta

NPI Number: 1326136854

Entity Type:

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

Enumeration Date: October 10, 2006

Last Update: April 24, 2008

Sole Proprietor: No

Update or Correct Profile

Mailing Address

50 Bellefontaine St, #301

Pasadena, CA 911053132

Phone: 6267934857

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.