Are you Gemma TOK HYON Ko, M.D.? This profile is yours to edit: update your address, phone, photo and services.
Edit this profileAt a glance
- 4511 Rosemead Blvd, Pico Rivera, CA 90660
About Dr. Ko
Based in Pico Rivera, CA, Gemma TOK HYON Ko, M.D. is listed in the NPI registry under internal medicine. Gemma graduated from University of Hawaii John A. Burns School of Medicine in 1990. Medicare claims data shows Gemma provided 764 services to 246 patients. The services billed most often include established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, insertion of needle into vein for collection of blood sample, and visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient'. NPI 1437167715 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (562) 692-3388
- Email not available
Practice Locations
4511 ROSEMEAD BLVD
Pico Rivera, CA 90660
Conditions Commonly Evaluated or Treated
Within Internal Medicine generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Cancer Prevention
Cancer risk
Environmental health
- Asbestos Exposure
- Contaminated drinking water exposure
- Heat exhaustion and heat stroke
- Radon gas exposure
- Tick bite and Lyme disease risk
- Toxic Mold Exposure
- Wildfire smoke and air pollution exposure
- Workplace Chemical Exposure
General wellness
Heart health
Infectious Disease
Infectious disease
Kidney health
Lifestyle & wellness
Lifestyle health
Longevity
Metabolic & Lifestyle
Occupational health
Occupational Health
Rashes & allergy
Sexual Health
Sexual health
Substance use
Travel health
Wellness and energy
Workplace health
Most searched conditions
Cardiometabolic
Digestive and liver
Endocrine, blood, and bone
Kidney and urinary
Respiratory
Blood & Circulation
- Blood clots
Blood disorders
- Anemia
Brain & Nerves
Brain and nerves
Cardiac and vascular
- AFib
Digestive
- Diverticulitis
Heart & Circulation
Infections
Kidney & Bladder
Lungs & Breathing
Mental Health
Neurologic and behavioral
Pain
Rheumatologic and pain
Procedures & services
Addiction & habits
Cancer screening
- Colon Cancer Screening Referral
- Lung cancer screening consult
- Mammogram Referral
Cancer Screening
Checkups & exams
Chronic illness
Diagnostics & screening
Environmental health
Fitness & body composition
Heart & Circulation
- Blood Pressure Check
- Heart monitor
Heart & circulation
Heart health
- Cardiac Stress Test Referral
Hospital-based procedures
- Inpatient medical management
Imaging referral
- Abdominal Ultrasound Referral
Immunizations
Infection & Microbiology Tests
- STI and STD Screening
- H. Pylori Breath Test
Lifestyle & Prevention
Longevity
Lower endoscopy
Lungs & Breathing
Metabolic & Weight
Metabolic health
Occupational health
Occupational Health
Office Procedures
- Skin Tag and Mole Removal
- Vitamin B12 Injections
- Wart Removal
Preventive and evaluation
- Preoperative medical clearance
- Medication management
- Post-hospital transitional care
Preventive imaging
Preventive screening
Routine Blood Tests
Screening & labs
Screening and diagnostic testing
- Blood pressure screening
- Cancer screening and prevention planning
- Diabetes and prediabetes screening
- EKG
- Spirometry
Screenings & Diagnostics
Travel Health
Travel medicine
Wellness
Wellness & Screening
Workplace health
Skin growths
Sleep
Most searched procedures
Bones & Joints
Brain and nerves
Digestive
- Endoscopy
Exams & Consultations
Lab tests
Minor procedures
- Ingrown toenail removal
- Suture removal
Office procedures
Pain management
Preventive & Routine Care
Sexual health
- STI Testing
Procedures Most Often Billed to Medicare
764 services · 246 patients · 10 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Insertion of needle into vein for collection of blood sample | Procedure | 36415 |
113 | As often as other peers in Internal Medicine |
| Collection and interpretation of physical parameters stored in computers and/or transmitted by the patient and/or caregiver to qualified health care professional, requiring 30 minutes or more, per 30 days | Treatment | 99091 |
57 | Less often than most peers in Internal Medicine |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
223 | As often as other peers in Internal Medicine |
| Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient' | Billing code | G2211 |
102 | As often as other peers in Internal Medicine |
| Management using the results of remote vital sign monitoring per calendar month, first 20 minutes | Office visit | 99457 |
68 | Less often than most peers in Internal Medicine |
| Remote monitoring of physiologic parameters, initial supply of devices with daily recordings or programmed alerts transmission, each 30 days | Office visit | 99454 |
65 | Less often than most peers in Internal Medicine |
| Telephone medical discussion with physician, 21-30 minutes | Office visit | 99443 |
58 | More often than most peers in Internal Medicine |
| Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | Billing code | G0439 |
33 | Less often than most peers in Internal Medicine |
| Management using the results of remote vital sign monitoring per calendar month, each additional 20 minutes | Office visit | 99458 |
33 | Less often than most peers in Internal Medicine |
| Remote monitoring of physiologic parameters, initial set-up and patient education on use of equipment | Office visit | 99453 |
12 | Less often than most peers in Internal Medicine |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other internists at this location 2
Same specialty, same street address — most likely the same department or group.
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.
Other internists in Pico Rivera 4
Same specialty, same city.
More connections — 23 related providers in 3 groups
Trained at University of Hawaii John A. Burns School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1990 at University of Hawaii John A. Burns School of Medicine 7
Providers who graduated from the same medical school in the same year.
Also performs Insertion of needle into vein for collection of blood sample 8
Providers in CA who bill this service to Medicare most often.
Common questions
What is Gemma TOK HYON Ko's specialty?
Gemma TOK HYON Ko is an internist in Pico Rivera, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Internal Medicine”.
NPI registry
Where can I find Gemma TOK HYON Ko?
Gemma TOK HYON Ko is listed at 4511 Rosemead Blvd, Pico Rivera, CA 90660. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Gemma TOK HYON Ko?
The number on file is (562) 692-3388. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Gemma TOK HYON Ko?
Gemma TOK HYON Ko's National Provider Identifier is 1437167715. 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
What is Gemma TOK HYON Ko's education?
Gemma TOK HYON Ko attended University of Hawaii John A. Burns School of Medicine, graduating in 1990. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Gemma TOK HYON Ko have?
Gemma TOK HYON Ko has 36 years experience. Calculated from a graduation year of 1990, reported in the CMS National Downloadable File.
CMS public data
What is Gemma TOK HYON Ko known for?
According to Medicare billing data, Gemma TOK HYON Ko performs procedures including insertion of needle into vein for collection of blood sample; provides treatments such as collection and interpretation of physical parameters stored in computers and/or transmitted by the patient and/or caregiver to qualified health care professional, requiring 30 minutes or more, per 30 days, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Gemma TOK HYON Ko's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Gemma TOK HYON Ko. If this is you, claiming it is free.
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