Byung Ahn, MD
NPI 1194715193 · Cardiovascular Disease Physician · Upland, CA
Enrolled with Medicare as Practitioner - Cardiovascular Disease (cardiology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Byung Ahn, MD is a Cardiovascular Disease Physician provider in Upland, CA (NPI 1194715193).
Provider details
- NPI number
- 1194715193
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- A39266 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
2,168 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 705 | $135 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 264 | $15 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 231 | $191 |
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function93306 | 188 | $210 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 175 | $81 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 63 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Metoprolol Succinate | 758 | 241 |
| Apixabanbrand: Eliquis | 581 | 142 |
| Atorvastatin Calcium | 511 | 172 |
| Carvedilol | 459 | 156 |
| Losartan Potassium | 428 | 145 |
| Rivaroxabanbrand: Xarelto | 324 | 85 |
| Amlodipine Besylate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$967 across 49 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 1382 E Foothill BlvdUpland, CA 91786-4014Phone: (909) 982-6500Fax: (909) 920-0406
Registry dates
- Enumerated
- 2005-10-21
- Last updated
- 2026-03-25
- Certified
- 2026-03-25
Frequently asked questions
- What is Byung Ahn's NPI number?
- Byung Ahn's National Provider Identifier (NPI) is 1194715193, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Byung Ahn's specialty?
- Byung Ahn is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Byung Ahn located?
- Byung Ahn's practice location on file with NPPES is 685 N 13th Ave Ste 1, Upland, CA 91786-4963.
- What is Byung Ahn's phone number?
- The practice phone number listed in the NPPES registry for Byung Ahn is (909) 500-8683.
- Does Byung Ahn accept Medicare?
- Byung Ahn is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Byung Ahn's NPI active?
- Yes — Byung Ahn's NPI (1194715193) is active in the NPPES registry as of the last update on 2026-03-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.