Dr. Sam Ahn, M.D.
What this data tells you about Dr. Ahn
Dr. Sam Ahn is an allergy & immunology physician in Napa, CA, with 19 years of NPI registration. Based on federal Medicare data, Dr. Ahn performed 26,096 Medicare services across 1,587 unique beneficiaries.
Between the years covered by Open Payments, Dr. Ahn received a total of $22,313 from 46 pharmaceutical and/or device companies across 433 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in allergy & immunology (internal medicine) physician. Most payments are for meals and travel — low-value interactions common across virtually all practicing physicians. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Ahn is Very High — reflecting how much public federal data is available about this provider. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.
Medicare Practice Summary
Medicare Utilization ↗Top procedures by volume
Ranked by number of services performed for Medicare patients. Avg. submitted charge is what the provider billed; avg. Medicare payment is what CMS paid.
| Procedure | Volume | Avg. paid | Avg. submitted |
|---|---|---|---|
| Omalizumab injection (Xolair) for asthma/allergy | 11,160 | $30 | $59 |
| Allergy skin test A diagnostic test performed to identify specific allergies by applying or introducing allergenic extracts to the body. The procedure measures the patient's immune response to various potential allergens. |
8,902 | $4 | $12 |
| Allergy injection therapy, multiple injections A professional service involving the administration of multiple allergen injections. |
1,505 | $10 | $38 |
| Allergy immunotherapy preparation A professional service involving the preparation and administration of one or more antigens. |
1,196 | $14 | $30 |
| Skin allergy test A test where small amounts of potential allergens are injected into the skin to check for allergic reactions. |
996 | $8 | $15 |
| Drug injection, under skin or into muscle A procedure involving the administration of a medication or substance via injection into the subcutaneous tissue or muscle. |
674 | $12 | $50 |
| Allergen injection administration Professional service for the administration of a single allergen injection. |
316 | $9 | $30 |
| Office visit, established patient (20-29 min) An office visit for an existing patient lasting between 20 and 29 minutes. The visit involves medical evaluation and management of the patient's condition. |
316 | $72 | $175 |
| Office visit, established patient (30-39 min) A follow-up office visit for an existing patient lasting between 30 and 39 minutes. The visit involves medical evaluation and management of the patient's condition. |
252 | $102 | $225 |
| Nitric oxide gas level test A test that measures the level of nitric oxide gas in the body. |
218 | $17 | $55 |
| New patient office visit (30-44 min) An initial office visit for a new patient lasting between 30 and 44 minutes. This code is used when the total time spent on the date of the encounter falls within this range. |
173 | $87 | $250 |
| Flu vaccine administration This procedure involves the administration of the influenza virus vaccine. It covers the process of delivering the vaccine to the patient. |
111 | $34 | $35 |
| Flu vaccine, high-dose High-dose seasonal influenza vaccine for adults aged 65 and older. Contains four times the antigen of standard-dose flu vaccines (60 mcg per strain), split-virus formulation, preservative-free, single-dose syringe. |
104 | $72 | $125 |
| Airflow rate measurement test A test that measures the rate of airflow. This procedure assesses how quickly air moves. |
104 | $33 | $72 |
| Office visit for established patient An office visit for an existing patient that may not require the healthcare professional to be present. |
56 | $20 | $40 |
| Breathing device use evaluation An assessment of how a patient uses a breathing device. The provider reviews the patient's technique and device handling. |
13 | $17 | $32 |
Industry Payment Transparency
Open Payments through 2024 ↗Payment profile
Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
Payments by company (2024)
All-time payments by company (2018-2024) ›
Associated products mentioned in payments ›
Most payments (50%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Geographic Context
0.0 mi
Data Sources
| Provider Registry | ✓ NPPES | Weekly updates |
| Medicare Enrollment | ✓ PECOS | Monthly updates |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not public | N/A |
This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This reflects how much public data is available about a provider. How we calculate this →
Summary
Dr. Ahn is a mixed practice specialist, with above-average Medicare volume (top 12% in CA), with mixed engagement industry engagement in the top 15% of CA peers, with 19 years of NPI registration.
This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →
Frequently Asked Questions
Is Dr. Ahn experienced with omalizumab injection (xolair) for asthma/allergy?
Does Dr. Ahn receive payments from pharmaceutical companies?
How do Dr. Ahn's costs compare to other allergy & immunology physicians in Napa?
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All data on this page is sourced verbatim from public federal records published by the U.S. Centers for Medicare & Medicaid Services (CMS): NPPES ↗, Open Payments ↗, Medicare Provider Utilization ↗, and PECOS. Publication is mandated by the Physician Payments Sunshine Act (§6002 ACA, 42 U.S.C. §1320a-7h) and the Freedom of Information Act.
This page is not medical advice, an endorsement, a recommendation, or a quality rating. Data Coverage reflects data completeness — how much federal information exists for this provider — not clinical performance, patient outcomes, or quality of care. Always verify information directly with the provider and consult a licensed clinician before making medical decisions.
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