Medicare Enrolled
Dr. Martin Ahn, M.D.
Family Medicine · Buena Park, CA
Practice pattern: Clinical Cardiology
— Primarily office-based clinical cardiology
Low-engagement
Very High
DATA COVERAGE
Data in 4 of 4 federal sources
Measures public federal data availability — not provider quality
Informational, not a quality rating.
This page presents federal public records about Dr. Ahn from CMS (NPPES, Open Payments, Medicare Provider Utilization, PECOS). It is not medical advice, an endorsement, or a judgment of clinical quality. Always consult the provider directly and a licensed clinician for medical decisions. Read methodology →
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What this data tells you about Dr. Ahn
Dr. Martin Ahn is a family medicine specialist in Buena Park, CA, with 19 years of NPI registration. Based on federal Medicare data, Dr. Ahn performed 4,267 Medicare services across 2,197 unique beneficiaries.
Between the years covered by Open Payments, Dr. Ahn received a total of $10,535 from 52 pharmaceutical and/or device companies across 583 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in family medicine. 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.
✓ 19 years in practice
▲ Top 4% volume in CA
$10,535 industry payments
Medicare Practice Summary
Medicare Utilization ↗4,267
Medicare services
Top 4% in CA for family medicine
2,197
Unique beneficiaries
$38
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~225 Medicare services per year of practice
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 |
|---|---|---|---|
| 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. |
903 | $86 | $120 |
| 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. |
482 | $12 | $30 |
| Blood draw (venipuncture) Insertion of a needle into a vein to collect a blood sample. |
372 | $8 | $10 |
| Vitamin B-12 injection An injection of vitamin B-12 (cyanocobalamin) with a dose of up to 1000 mcg. |
371 | $1 | $20 |
| Automated urinalysis An automated laboratory test performed on a urine sample to analyze its chemical and physical properties. The procedure uses machinery to detect various substances and cells within the urine. |
247 | $2 | $10 |
| Creatinine test (kidney function) A blood test that measures the amount of creatinine to assess kidney function or detect muscle injury. |
228 | $5 | $10 |
| Telephone medical discussion, 11-20 minutes A phone conversation with a physician lasting between 11 and 20 minutes. |
227 | $41 | $60 |
| Urine microalbumin test A laboratory test that measures the amount of a specific protein called microalbumin in a urine sample. This analysis helps assess kidney function. |
208 | $6 | $10 |
| Dexamethasone injection (steroid) An injection of dexamethasone sodium phosphate, a corticosteroid medication, administered in a dose of 1 milligram. |
116 | $0 | $10 |
| Quadrivalent influenza vaccine, cell-culture derived A flu shot containing four strains of influenza virus, produced using cell culture technology rather than eggs. This formulation is free from preservatives and antibiotics. |
110 | $33 | $50 |
| Flu vaccine administration This procedure involves the administration of the influenza virus vaccine. It covers the process of delivering the vaccine to the patient. |
109 | $33 | $38 |
| Annual wellness visit, follow-up A follow-up annual wellness visit that includes a personalized prevention plan of service. |
95 | $137 | $250 |
| Ceftriaxone antibiotic injection This code represents the administration of ceftriaxone sodium, an antibiotic medication. The charge is calculated for every 250 mg of the drug administered. |
76 | $0 | $20 |
| 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. |
71 | $63 | $85 |
| Office visit, established patient (10-19 min) An office visit for an existing patient lasting 10 to 19 minutes. The visit involves medical evaluation and management of the patient's condition. |
54 | $47 | $65 |
| Normal saline infusion, 500 ml Administration of sterile normal saline solution through an intravenous line. This procedure involves the infusion of a 500 ml unit of the solution. |
51 | $1 | $10 |
| Intravenous hydration infusion, 31-60 minutes Administration of fluids into a vein to maintain hydration. This procedure involves an infusion lasting between 31 and 60 minutes. |
50 | $29 | $115 |
| Additional hour of intravenous hydration This code represents each additional hour of intravenous fluid administration beyond the initial hour. It is used to bill for extended hydration therapy. |
50 | $11 | $33 |
| Magnesium sulfate injection, per 500 mg An injection of magnesium sulfate administered in 500 mg increments. |
50 | $1 | $20 |
| Blood glucose test using hand-held instrument A test that measures the level of sugar in the blood using a portable device. The result helps monitor blood glucose levels. |
49 | $3 | $10 |
| Hemoglobin blood test A blood test that measures the amount of hemoglobin, the protein in red blood cells that carries oxygen. |
48 | $2 | $10 |
| Ultrasound of leg arteries or grafts An imaging test that uses sound waves to create pictures of the blood vessels in the legs or any surgical grafts present. |
39 | $206 | $634 |
| Ultrasound of head and neck blood flow, bilateral An ultrasound exam that uses sound waves to visualize and assess blood flow in the vessels of both the head and the neck. |
37 | $126 | $503 |
| Complete ultrasound of abdomen A diagnostic imaging test that uses sound waves to create detailed pictures of the organs and structures within the abdomen. |
36 | $86 | $250 |
| Electrocardiogram (EKG), 12-lead A standard heart rhythm test using at least 12 leads to record electrical activity. A healthcare provider interprets the results and provides a written report. |
36 | $11 | $42 |
| Echocardiogram, transthoracic An ultrasound of the heart that uses color to show blood flow, rate, direction, and valve function. |
36 | $140 | $450 |
| Ultrasound of arm or leg veins An ultrasound exam of the veins in the arm or leg. The test uses sound waves to check blood flow and may include compression and other maneuvers. |
25 | $127 | $514 |
| Urine microalbumin test (kidney screening) A laboratory test that measures the amount of microalbumin, a small protein, in a urine sample. This test is used to detect early signs of kidney damage. |
24 | $6 | $20 |
| Pneumonia vaccine administration This procedure involves the injection of a vaccine to protect against pneumococcal disease. It is administered by a healthcare provider. |
23 | $33 | $40 |
| Initial preventive physical examination, new Medicare beneficiary A comprehensive preventive health visit for new Medicare beneficiaries during their first 12 months of enrollment. The service is conducted as a face-to-face visit and is limited to preventive care. |
18 | $173 | $220 |
| Pneumococcal vaccine, 23-valent A vaccine that protects against 23 types of pneumococcal bacteria. It is used to prevent infections caused by these bacteria. |
13 | $131 | $175 |
| New patient office visit (45-59 min) An initial office visit for a new patient lasting between 45 and 59 minutes. This code covers the total time spent by the physician or qualified healthcare professional on the date of the encounter. |
13 | $99 | $195 |
How to read this data: This reflects Medicare patients only (typically 65+). Payment amounts are what Medicare paid the provider, not your out-of-pocket cost. A higher procedure volume generally indicates more experience with that procedure.
3.2% high complexity
28.9% medium
67.9% routine
Industry Payment Transparency
Open Payments through 2024 ↗$10,535
Total received (2018-2024)
Avg $1,505/year across 7 years
Top 4% in CA for family medicine
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
52
Companies
583
Individual payments
All payments are legal and publicly reported · Not evidence of wrongdoing · How to interpret →
Payment profile
Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.
Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$10,535 (100.0%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$1,515
2023
$1,193
2022
$1,180
2021
$2,104
2020
$1,882
2019
$1,376
2018
$1,284
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
AstraZeneca Pharmaceuticals LP
$305
Lilly USA, LLC
$213
Amgen Inc.
$212
ABBVIE INC.
$184
Bayer Healthcare Pharmaceuticals Inc.
$92
Boehringer Ingelheim Pharmaceuticals, Inc.
$91
GlaxoSmithKline, LLC.
$82
Salix Pharmaceuticals, a division of Bausch Health US, LLC
$58
Corcept Therapeutics
$52
Novo Nordisk Inc
$45
Merck Sharp & Dohme LLC
$43
Exact Sciences Corporation
$43
Hologic Sales and Service, LLC
$25
Ardelyx, Inc.
$24
Sumitomo Pharma America, Inc.
$16
Abbott Laboratories
$15
AIMMUNE THERAPEUTICS, INC.
$15
Top 3 companies account for 48.2% of 2024 payments
All-time payments by company (2018-2024) ›
AstraZeneca Pharmaceuticals LP
$1,828
Amgen Inc.
$1,599
Lilly USA, LLC
$1,047
AbbVie Inc.
$819
Amarin Pharma Inc.
$662
PFIZER INC.
$650
Novo Nordisk Inc
$421
ABBVIE INC.
$396
Boehringer Ingelheim Pharmaceuticals, Inc.
$385
GlaxoSmithKline, LLC.
$319
Merck Sharp & Dohme LLC
$311
SANOFI-AVENTIS U.S. LLC
$217
Merck Sharp & Dohme Corporation
$144
Bayer Healthcare Pharmaceuticals Inc.
$133
Bayer HealthCare Pharmaceuticals Inc.
$127
Salix Pharmaceuticals, a division of Bausch Health US, LLC
$110
Novartis Pharmaceuticals Corporation
$109
Astellas Pharma US Inc
$94
Horizon Therapeutics plc
$84
Abbott Laboratories
$83
Nestle HealthCare Nutrition Inc.
$83
Corcept Therapeutics
$74
Allergan Inc.
$69
Janssen Pharmaceuticals, Inc
$64
Esperion Therapeutics, Inc.
$58
Exact Sciences Corporation
$43
E.R. Squibb & Sons, L.L.C.
$40
Radius Health, Inc.
$40
Genentech USA, Inc.
$39
AbbVie, Inc.
$38
Allergan, Inc.
$33
Mannkind Corporation
$33
Takeda Pharmaceuticals U.S.A., Inc.
$28
MannKind Corporation
$26
Hologic Sales and Service, LLC
$25
Ardelyx, Inc.
$24
Biohaven Pharmaceutical Holding Company Ltd.
$24
Synergy Pharmaceuticals Inc
$24
Averitas Pharma Inc.
$23
Ultragenyx Pharmaceutical Inc.
$22
VIVUS LLC
$20
Lundbeck LLC
$20
Seqirus USA Inc
$20
Oxford Immunotec USA Inc
$18
Biohaven Pharmaceuticals, Inc.
$18
Sumitomo Pharma America, Inc.
$16
Eisai Inc.
$15
Horizon Pharma plc
$15
AIMMUNE THERAPEUTICS, INC.
$15
VBI Vaccines (Delaware) Inc.
$12
Medtronic MiniMed, Inc.
$11
Optos, Inc.
$8
Top 3 companies account for 42.5% of all-time payments
Associated products mentioned in payments ›
AFREZZA · AIRSUPRA · AREXVY · Aimovig · Amitiza · BASAGLAR · BELSOMRA · BREZTRI · BYSTOLIC · CHANTIX · COLOGUARD · COLOGUARD DNA CAPTURE REAGENTS · CREON · Cologuard Collection Kit · Creon · Dayvigo · ELIQUIS · EMGALITY · ENTRESTO · EVENITY · FARXIGA · FLUCELVAX QUADRIVALENT · FREESTYLE LIBRE 3 · FreeStyle Libre 2 · GEMTESA · IBSRELA · INVOKANA · JANUVIA · JARDIANCE · KRYSTEXXA · Kerendia · Korlym · LEQVIO · LINZESS · LYRICA · MOUNJARO · MYRBETRIQ · NEXLETOL · NORTHERA · NURTEC ODT · Otezla · Ozempic · P200DTx · PENNSAID · PREMARIN · PreHevbrio · QSYMIA · QULIPTA · QUTENZA · Repatha · Rybelsus · SHINGRIX · SOLIQUA 100/33 · STEGLATRO · Saxenda · THINPREP 2000 PROCESSOR · TOUJEO · TRADJENTA · TRELEGY ELLIPTA · TRINTELLIX · TRULICITY · TSPOT TB TEST · Tresiba · Trulance · Tymlos · UBRELVY · VERQUVO · VIBERZI · Vascepa · Victoza · Wegovy · XARELTO · XIFAXAN · Xofluza · ZENPEP · ZEPBOUND · iPro2
Should you be concerned? Payments from pharmaceutical and device companies are legal and common — 57% of U.S. physicians receive at least one. They often reflect legitimate consulting, research, or education. What matters is whether a recommended drug or device appears in your doctor's payment records. If so, consider asking your doctor about it. How to interpret this data →
Most payments (100%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians. Total industry engagement is in the top 4% for family medicine in CA.
Geographic Context
Family medicine physicians within 10 mi
3,798
Per 100K population
120.0
County median income
$113,702
Nearest hospital
AHMC ANAHEIM REGIONAL MEDICAL CENTER
3.1 mi
3.1 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 clinical cardiology specialist, with above-average Medicare volume (top 4% in CA), with low-engagement industry engagement in the top 4% 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 office visit, established patient (30-39 min)?
Based on Medicare claims data, Dr. Ahn performed 903 office visit, established patient (30-39 min) services. Research suggests that higher procedure volume is often associated with better outcomes, particularly for complex procedures. Note that Medicare data only captures patients aged 65 and older, so the total practice volume across all patients is likely higher.
Does Dr. Ahn receive payments from pharmaceutical companies?
Yes. Dr. Ahn received a total of $10,535 from 52 companies across 583 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common among physicians — 57% of all U.S. physicians receive at least one industry payment. Patients may wish to ask their doctor about these relationships, especially if a recommended drug or device appears in the payment records.
How do Dr. Ahn's costs compare to other family medicine physicians in Buena Park?
Dr. Ahn's average Medicare payment per service is $38. Note that these figures represent what Medicare pays, not your out-of-pocket cost, which depends on your specific insurance plan and deductible. Procedure-level data above shows both what was submitted and what Medicare paid for each service type.
What does Data Coverage mean?
Data Coverage (currently Very High for Dr. Ahn) measures how much public federal data is available about a provider. It is not a quality rating. A "Very High" or "High" level means the provider has data across multiple federal sources (NPPES, PECOS, Medicare Utilization, Open Payments), indicating a long track record of practice, Medicare participation, and industry disclosure. A "Low" or "Moderate" level may simply mean the provider is newer, does not see Medicare patients, or has not received any industry payments — none of which are inherently negative. Read our full methodology →
Is this data up to date?
Each data source has its own update cycle. Provider registry data (NPPES) is updated weekly. Medicare enrollment (PECOS) is updated monthly. Medicare practice data has a ~2 year lag — the most recent available is typically 2 years prior. Industry payment data (Open Payments) is published annually, usually in June, covering the prior calendar year. We display the data date prominently on each section so you always know how current it is. See our data freshness policy →
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About this page
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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