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Edit this profileWhere to find Sam S. Ahn, M.D.
- Napa location main office
1100 Pear Tree Ln, Napa, CA 94558 - Sonoma location
414 W Napa St Ste B, Sonoma, CA 95476
About Dr. Ahn
Sam S. Ahn, M.D. practices allergy/immunology in Napa, CA. Sam is a 2003 graduate of Harvard Medical School. Sam is also listed as specializing in internal medicine. According to Medicare claims data, Sam cared for 1,611 Medicare patients across 29,270 services. The services billed most often include injection, omalizumab, 5 mg, test for allergy using allergenic extract, and professional service for multiple injections of allergen. The provider's National Provider Identifier (NPI) is 1558423814.
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
- (707) 258-8100
- Email not available
Practice Locations
1100 PEAR TREE LN
Napa, CA 94558
414 W Napa St Ste B
Sonoma, CA 95476
Conditions Commonly Evaluated or Treated
Within Allergy and Immunology 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
Most searched conditions
- Asthma
- Eczema
- Food allergies
- Hives
- Seasonal allergies
Allergies
- Angioedema
- Cockroach Allergy
- Histamine Intolerance
- Oral Allergy Syndrome
- Red Meat Allergy
Digestive
- Eosinophilic esophagitis
Drug allergies
- Sulfa Drug Allergy
Drug allergy
- Aspirin Allergy
- Drug Allergies
- Penicillin Allergy
- Vaccine Allergy
Emergency
- Severe Allergic Shock
Environmental
- Dust Mite Allergy
- Insect Sting Allergy
- Latex Allergy
- Mold Allergy
- Pet Allergies
Eye
Food allergies
- Egg Allergy
- Milk Allergy
- Peanut Allergy
- Shellfish Allergy
- Soy Allergy
- Tree Nut Allergy
- Wheat Allergy
Immune conditions
Immunology
- Common Variable Immunodeficiency
- Frequent Infections
- Hereditary Angioedema
- Mast Cell Activation Syndrome
- Weak Immune System
Lung conditions
- Allergic Asthma
- Wheezing
Respiratory
- Chronic cough
Sinus
- Chronic sinusitis
- Loss or reduction of smell
- Nasal polyps
- Nonallergic rhinitis
- Post-Nasal Drip
Sinus conditions
- Sinus Headaches
Skin
- Cold Allergy
- Contact dermatitis
- Nickel Allergy
- Sun Allergy
Skin conditions
- Chronic itching
- Poison Ivy Rash
- Skin Writing Rash
Procedures & services
Most searched procedures
- Allergy testing
- Immunotherapy
- Patch testing
Allergy treatments
- Allergy Drops
- Asthma Biologics
- Food Desensitization
- Peanut Allergy Pill Treatment
- Sublingual Dust Mite Treatment
- Under-The-Tongue Allergy Tablets
Diagnostic
- Asthma challenge test
- Drug Challenge Test
- Exercise Challenge Breathing Test
- Exhaled nitric oxide test
- Ice Cube Test for Cold Allergy
- Immune System Blood Test
- Nasal endoscopy
- Oral Food Challenge
- Peak Flow Test
- Penicillin Allergy Testing
- Spirometry
- Tryptase Blood Test
- Vaccine Challenge Test
- Vaccine Response Antibody Test
Infusion
- C1 Esterase Inhibitor Infusion
- IVIG Infusion
- Subcutaneous Immunoglobulin Infusion
Medication therapy
- Fasenra Injections
- Nucala Injections
- Tezspire Injections
Medications
- Dupixent Injections
- Targeted therapy
- Xolair Injections
Preventive
- Anaphylaxis Emergency Action Plan
- Epinephrine Autoinjector Training
Respiratory
- Inhaler technique instruction
- Nebulizer Breathing Treatment
Tests
- Allergy Blood Testing
- Allergy Skin Prick Test
- Blood Component Allergy Test
- Complement Blood Test
- Eosinophil Blood Count
- Intradermal Allergy Test
- Pulmonary function test
- Skin Test For Metal Allergy
- Total IgE Blood Test
Treatment
- Aspirin Desensitization
- Dietary Allergen Elimination Plan
- Drug Desensitization Protocol
- Sinus Rinse Training
Procedures Most Often Billed to Medicare
29,270 services · 1,611 patients · 15 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Test for allergy using allergenic extract | Treatment | 95004 |
9,216 | More than most peers in Allergy/Immunology |
| Professional service for multiple injections of allergen | Treatment | 95117 |
1,492 | More than most peers in Allergy/Immunology |
| Test for allergy using allergenic extract injected into skin | Treatment | 95024 |
1,257 | More than most peers in Allergy/Immunology |
| Professional service for preparation and provision of 1 or more antigens | Treatment | 95165 |
1,223 | As often as other peers in Allergy/Immunology |
| Injection of drug or substance under skin or into muscle | Treatment | 96372 |
754 | More than most peers in Allergy/Immunology |
| Professional service for single injection of allergen | Treatment | 95115 |
340 | More often than most peers in Allergy/Immunology |
| Test to measure the level of nitric oxide gas | Treatment | 95012 |
231 | More than most peers in Allergy/Immunology |
| Test to measure rate of airflow | Treatment | 94375 |
100 | More often than most peers in Allergy/Immunology |
| Influenza vaccine split virus, preservative free | Treatment | 90662 |
58 | More often than most peers in Allergy/Immunology |
| Injection, omalizumab, 5 mg | Drug given | J2357 |
13,695 | Too few peers to compare |
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 allergy/immunology specialists at this location 1
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.
Trained at Harvard Medical School 8
Other providers in the same specialty who trained at the same institution.
More connections — 16 related providers in 2 groups
Class of 2003 at Harvard Medical School 8
Providers who graduated from the same medical school in the same year.
Also performs Test for allergy using allergenic extract 8
Providers in CA who bill this service to Medicare most often.
Common questions
What kind of doctor is Sam S. Ahn?
Sam S. Ahn is an allergy/immunology in Napa, CA. That is the designation recorded for this NPI in the federal registry.
NPI registry
What is Sam S. Ahn's address?
Sam S. Ahn is listed at 1100 Pear Tree Ln, Napa, CA 94558. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Sam S. Ahn?
The number on file is (707) 258-8100. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Sam S. Ahn's NPI number?
Sam S. Ahn's National Provider Identifier is 1558423814. 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 Sam S. Ahn train?
Sam S. Ahn attended Harvard Medical School, graduating in 2003. This comes from the CMS National Downloadable File.
CMS public data
How long has Sam S. Ahn been practicing?
Sam S. Ahn has 23 years experience. Calculated from a graduation year of 2003, reported in the CMS National Downloadable File.
CMS public data
What procedures does Sam S. Ahn perform?
According to Medicare billing data, Sam S. Ahn provides treatments such as test for allergy using allergenic extract and professional service for multiple injections of allergen, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Sam S. Ahn confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Sam S. Ahn. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.