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Edit this profileAt a glance
- 1425 S Main St, Medical Office Building 1St Floor, Walnut Creek, CA 94596
About Dr. Nguyen
Nathan K. Nguyen, M.D. is a healthcare provider in Walnut Creek, CA specializing in internal medicine. Nathan trained at State University of Ny Upstate Medical University, graduating in 2007. Nathan is also listed as specializing in critical care medicine. According to Medicare claims data, the services billed most often include critical care, first 30-74 minutes. This provider record is associated with NPI 1861636615.
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
- (925) 295-4050
- Email not available
Practice Locations
1425 S MAIN ST MEDICAL OFFICE BUILDING 1ST FLOOR
Walnut Creek, CA 94596
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
Heart & circulation
Heart health
Hospital-based procedures
Imaging referral
Immunizations
Infection & Microbiology Tests
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
Exams & Consultations
Lab tests
Minor procedures
Office procedures
Pain management
Preventive & Routine Care
Sexual health
Procedures Most Often Billed to Medicare
16 services · 12 patients · 1 distinct code
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Critical care, first 30-74 minutes | Office visit | 99291 |
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.
Other internists at this location 3
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 2
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 — 22 related providers in 3 groups
Other internists in Walnut Creek 6
Same specialty, same city.
Trained at State University of Ny Upstate Medical University 8
Other providers in the same specialty who trained at the same institution.
Class of 2007 at State University of Ny Upstate Medical University 8
Providers who graduated from the same medical school in the same year.
Common questions
What does Nathan K. Nguyen specialize in?
Nathan K. Nguyen is an internist in Walnut Creek, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Internal Medicine”.
NPI registry
Where is Nathan K. Nguyen located?
Nathan K. Nguyen is listed at 1425 S Main St Medical Office Building 1St Floor, Walnut Creek, CA 94596. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Nathan K. Nguyen's phone number?
The number on file is (925) 295-4050. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Nathan K. Nguyen?
Nathan K. Nguyen's National Provider Identifier is 1861636615. 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 Nathan K. Nguyen train?
Nathan K. Nguyen attended State University of Ny Upstate Medical University, graduating in 2007. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Nathan K. Nguyen have?
Nathan K. Nguyen has 19 years experience. Calculated from a graduation year of 2007, reported in the CMS National Downloadable File.
CMS public data
What does Nathan K. Nguyen do most often?
According to Medicare billing data, Nathan K. Nguyen the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Nathan K. Nguyen's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Nathan K. Nguyen. If this is you, claiming it is free.
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