BYUNG DON AHN MD
NPI 1194715193
Internal Medicine - Cardiovascular Disease in Upland, CA

Active since October 21, 2005PECOS EnrolledAccepts Medicare Assignment
685 N 13TH AVE STE 1, UPLAND, CA 91786(909) 500-8683 Get Directions Write a Review

NPPES record last updated: March 25, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Byung Don Ahn Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

BYUNG DON AHN MD (NPI 1194715193) is an individual cardiovascular disease provider in Upland, California, licensed in California (A39266) and active in the NPI registry since October 2005. He is enrolled in Medicare PECOS, maintains a secondary practice location in Upland, and is a graduate of Other (1978).

NPPES Registry Identity

NPI1194715193
Entity TypeIndividualMale
Primary Taxonomy207RC0000X
Provider Legal NameBYUNG DON AHNCredential: MD
Location Address685 N 13TH AVE STE 1Upland, CA 91786-4963
Mailing Address1382 E Foothill BlvdUpland, CA 91786-4014 · (909) 982-6500 · Fax (909) 920-0406
Sole ProprietorYes
Medical School CMSOtherGraduated 1978
Enumeration DateOctober 21, 2005
Last NPPES UpdateMarch 25, 2026
NPPES CertifiedMarch 25, 2026
NPI 1194715193 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RC0000X
License Licensed in CA · A39266
Definition
An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.
685 N 13TH AVE STE 1, Upland, CA 91786

Secondary Practice Location 1

Location 11382 E Foothill BlvdUpland, CA 91786-4014 · Phone (909) 982-6500 · Fax (909) 920-0406

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

Byung Don Ahn Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID1153216197
PECOS Enrollment IDI20080717000193
Eligible to Order & Refer Part B Labs & Imaging Durable Medical Equipment Home Health Agency Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 24

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
705 services384 patients
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 93000
An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.
264 services254 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
231 services189 patients
Ultrasound of heart with color-depicted blood flow, rate, direction and valve function 93306
This is a heart ultrasound, also known as an echocardiogram. It uses sound waves to create pictures of your heart, showing how blood flows through it. The color depicts the blood flow's speed and direction. It also checks the heart's valves to ensure they're working properly.
188 services180 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
175 services50 patients
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010
A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.
95 services85 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91786 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$136.04 typical visit price
range $59.60 – $179.42
Typical copayment $34.01 (range $14.90 – $44.85)
Most-billed visit code 99204
Established Patient
$74.08 typical visit price
range $19.37 – $146.42
Typical copayment $18.52 (range $4.84 – $36.60)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 2

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Nurse Practitioner (Family)
685 N 13TH AVE STE 1
UPLAND, CA 91786
Nurse Practitioner (Family)
685 N 13TH AVE STE 1
UPLAND, CA 91786

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Byung Ahn's NPI number?

The NPI number for Byung Ahn is 1194715193. It was assigned to this individual provider in the NPPES registry on October 21, 2005.

Where is Byung Ahn located?

Byung Ahn practices at 685 N 13th Ave Ste 1, Upland, CA 91786. The listed phone number is (909) 500-8683.

What is Byung Ahn's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Is Byung Ahn enrolled in Medicare?

Yes. Byung Ahn is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for Byung Ahn was last updated on March 25, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.