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Edit this profileAt a glance
- 12221 Brookhurst St Ste 100, Garden Grove, CA 92840
About Dr. Nguyen
Based in Garden Grove, CA, Tam K. Nguyen, M.D. is listed in the NPI registry under internal medicine. Tam graduated from Tulane University School of Medicine in 1994. According to Medicare claims data, Tam cared for 254 Medicare patients across 1,288 services. 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, injection of drug or substance under skin or into muscle, and physician or allowed practitioner supervision of a patient receiving medicare-covered services provided by a participating home health agency (patient not present) requiring complex and multidisciplinary care modalities involving regular physician or allo. NPI 1720153182 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
- (714) 805-8260
- Email not available
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Practice Locations
12221 BROOKHURST ST STE 100
Garden Grove, CA 92840
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 disorders
Brain & Nerves
Brain and nerves
Cardiac and vascular
Digestive
Heart & Circulation
Infections
Kidney & Bladder
Lungs & Breathing
Mental Health
Neurologic and behavioral
Pain
Rheumatologic and pain
Procedures & services
Addiction & habits
Cancer screening
Cancer Screening
Checkups & exams
Chronic illness
Diagnostics & screening
Environmental health
Fitness & body composition
Heart & Circulation
- Blood Pressure Check
- Heart monitor
Heart & circulation
Heart health
Hospital-based procedures
Imaging 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
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
Office procedures
Pain management
Preventive & Routine Care
Sexual health
Procedures Most Often Billed to Medicare
1,288 services · 254 patients · 5 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Injection of drug or substance under skin or into muscle | Treatment | 96372 |
300 | More 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 |
742 | More than most peers in Internal Medicine |
| Physician or allowed practitioner supervision of a patient receiving medicare-covered services provided by a participating home health agency (patient not present) requiring complex and multidisciplinary care modalities involving regular physician or allo | Billing code | G0181 |
198 | More often than most peers in Internal Medicine |
| Residence visit for established patient with high level of medical decision making, per day, if using time, at least 60 minutes | Office visit | 99350 |
32 | Less often than most peers in Internal Medicine |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
16 | 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.
Also at this address 2
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 Garden Grove 8
Same specialty, same city.
Trained at Tulane University School of Medicine 8
Other providers in the same specialty who trained at the same institution.
More connections — 16 related providers in 2 groups
Class of 1994 at Tulane University School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Injection of drug or substance under skin or into muscle 8
Providers in CA who bill this service to Medicare most often.
Common questions
What is Tam K. Nguyen's specialty?
Tam K. Nguyen is an internist in Garden Grove, 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 Tam K. Nguyen?
Tam K. Nguyen is listed at 12221 Brookhurst St Ste 100, Garden Grove, CA 92840. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Tam K. Nguyen?
The number on file is (714) 805-8260. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Tam K. Nguyen's NPI number?
Tam K. Nguyen's National Provider Identifier is 1720153182. 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 Tam K. Nguyen's education?
Tam K. Nguyen attended Tulane University School of Medicine, graduating in 1994. This comes from the CMS National Downloadable File.
CMS public data
How long has Tam K. Nguyen been practicing?
Tam K. Nguyen has 32 years experience. Calculated from a graduation year of 1994, reported in the CMS National Downloadable File.
CMS public data
What is Tam K. Nguyen known for?
According to Medicare billing data, Tam K. Nguyen provides treatments such as injection of drug or substance under skin or into muscle, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Tam K. Nguyen confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Tam K. Nguyen. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.