DR. JOSEPH D CHUN M.D.
NPI 1710015425
Allergy & Immunology in Fullerton, CA
NPI Status: Active since March 02, 2007
Contact Information
1501 W COMMONWEALTH AVE
FULLERTON, CA
ZIP 92833
Phone: (714) 410-3100
- Individual
- Male
- Years of Experience 42
- Allergy & Immunology
- Accepts Medicare Approved Payment
- PECOS Enrolled
About JOSEPH CHUN
This page provides the complete NPI Profile along with additional information for Joseph Chun, a provider established in Fullerton, California with a medical specialization in Allergy & Immunology and more than 42 years of experience. He graduated from University Of California, Geffen School Of Medicine in 1984. The healthcare provider is registered in the NPI registry with number 1710015425 assigned on March 2007. The practitioner's primary taxonomy code is 207K00000X with license number G61950 (CA). The provider is registered as an individual and his NPI record was last updated February 2026.
- NPI
- 1710015425
- Provider Name
- DR. JOSEPH D CHUN M.D.
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 1501 W COMMONWEALTH AVE FULLERTON, CA 92833
- Location Phone
- (714) 410-3100
- Mailing Address
- PO BOX 35380 LAS VEGAS, NV 89133
- Mailing Phone
- (702) 579-3203
- Medical School Name
- UNIVERSITY OF CALIFORNIA, GEFFEN SCHOOL OF MEDICINE
- Graduation Year
- 1984
- Is Sole Proprietor?
- No
- Enumeration Date
- 03-02-2007
- Last Update Date
- 02-04-2026
- Code Navigator
Location Map
Secondary Locations
- 6261 Stanton Ave
Buena Park, CA 90621
(714) 739-4325
Specialty - Primary Taxonomy
The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.
- Classification
Allergy & Immunology
- Taxonomy Code
- 207K00000X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- G61950
- License State
- CA
- Taxonomy Description
- An allergist-immunologist is trained in evaluation, physical and laboratory diagnosis, and management of disorders involving the immune system. Selected examples of such conditions include asthma, anaphylaxis, rhinitis, eczema, and adverse reactions to drugs, foods, and insect stings as well as immune deficiency diseases (both acquired and congenital), defects in host defense, and problems related to autoimmune disease, organ transplantation, or malignancies of the immune system.
Secondary Taxonomies
The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.
| No. | Taxonomy Code | Type | Classification / Specialization |
License No. (State) |
|---|---|---|---|---|
| 1 | 207R00000X | Allopathic & Osteopathic Physicians | Internal Medicine | G61950 (CA) |
| 2 | 208000000X | Allopathic & Osteopathic Physicians | Pediatrics | G61950 (CA) |
Insurance Plans Accepted
According to publicly available information the provider might be accepting the following health plans from these health insurance companies:
Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.
Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.
*Please verify directly with this provider to make sure your insurance plan is currently accepted.
Additional Identifiers
The NPI Enumerator encourages providers to submit additional identifiers with their NPI application although the submission of this information is optional. The additional identifier(s) section includes other numbers or codes currently or formerly used as an identifier for the provider by other public healthcare entities. The identifiers may include UPIN, NSC, OSCAR, DEA, Medicaid State or PIN identification numbers.
| Identifier | Type / Code | Identifier State | Identifier Issuer |
|---|---|---|---|
| GR00088840 | MEDICAID (05) | CA |
Medicare Participation & PECOS Enrollment Status
Joseph Chun is registered with Medicare and accepts claims assignment, this means the provider accepts the approved amount for the cost of rendered services as full payment. Participating providers may not charge beneficiaries more than the approved amount for their services. Please keep in mind that beneficiaries still have to pay a coinsurance or copayment amount for a visit or service.
Joseph Chun is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.
What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.
Is the provider registered in PECOS? Yes
PECOS PAC ID: 1355331935
What is the PECOS Associate Control ID?
A PAC ID is a unique 10-digit number assigned to an individual or organization healthcare provider in PECOS. The PAC ID is used to link together all the provider information, like tax identification numbers and organizational names. A PAC ID can be connected to multiple Enrollment IDs if an individual or organization has enrolled in PECOS more than once.PECOS Enrollment ID: I20110615000398
What is the Provider Enrollment ID?
The Enrollment ID is a unique alphanumeric 15-digit code assigned to each new provider's PECOS enrollment application. The Enrollment ID is used to link together all the provider enrollment information like enrollment type, state, provider specialty, and reassignment of benefits.Accepts Medicare Assignment? Yes
What does it mean "accepts medicare assignment"?
When a provider accepts Medicare assignment, the provider agrees to be paid directly by Medicare and to accept the payment amount approved by Medicare. Additionally, the provider agrees to not bill patients for more than the Medicare deductible and coinsurance amounts.
A provider who doesn't accept assignment may charge you up to 15% over the Medicare-approved amount. This is known as the limiting charge. You may have to pay this amount, or it may be covered by another insurer.Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes
Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes
Eligible to Order or Refer a Home Health Agency (HHA): Yes
Eligible to Order or Refer Power Mobility Devices: Yes
Provider Referred Orders for Durable Medical Equipment, Devices & Supplies
The following list reflects the services, supplies or durable medical equipment ordered by this provider to a DME supplier on behalf of patients. The information below is derived from Medicare claims data and reflects the BETOS category, HCPCS code information and the number times each service was submitted under the Medicare fee-for-service program.
Durable Medical Equipment
DME-Other DME (DE017N)
Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips (HCPCS:A4253)
15 DME suppliers used 42 Medicare Claims 92 Services Paid
DME-Medical/Surgical Supplies (DA000N)
Lancets, per box of 100 (HCPCS:A4259)
13 DME suppliers used 31 Medicare Claims 37 Services Paid
DME-Hospital Beds (DB000N)
Hospital bed, semi-electric (head and foot adjustment), with any type side rails, with mattress (HCPCS:E0260)
1 DME suppliers used 30 Medicare Claims 30 Services Paid
DME-Hospital Beds (DB000N)
Hospital bed, semi-electric (head and foot adjustment), with any type side rails, without mattress (HCPCS:E0261)
1 DME suppliers used 15 Medicare Claims 15 Services Paid
DME-Wheelchairs (DD000N)
Standard hemi (low seat) wheelchair (HCPCS:K0002)
1 DME suppliers used 12 Medicare Claims 12 Services Paid
DME-Other DME (DE017N)
Supply allowance for therapeutic continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service (HCPCS:K0553)
2 DME suppliers used 12 Medicare Claims 12 Services Paid
DME-Wheelchairs (DD009N)
Power wheelchair, group 2 standard, captains chair, patient weight capacity up to and including 300 pounds (HCPCS:K0823)
1 DME suppliers used 11 Medicare Claims 11 Services Paid
Unknown
Other-Enteral and Parenteral (OB006N)
Enteral feeding supply kit; pump fed, per day, includes but not limited to feeding/flushing syringe, administration set tubing, dressings, tape (HCPCS:B4035)
1 DME suppliers used 13 Medicare Claims 390 Services Paid
Other-Enteral and Parenteral (OB006N)
Enteral formula, nutritionally complete, for special metabolic needs, excludes inherited disease of metabolism, includes altered composition of proteins, fats, carbohydrates, vitamins and/or minerals, may include fiber, administered through an enteral feeding tube, 100 calories = 1 unit (HCPCS:B4154)
1 DME suppliers used 13 Medicare Claims 5700 Services Paid
Areas of Expertise
The following services and procedures, recently provided to Medicare patients, illustrate the range of care this provider offers. This list reflects the variety of services available to all patients visiting the practice and is based on 2022 Medicare dataset. In general, the more frequently a provider treats specific conditions or performs particular procedures, the more experienced they become in addressing similar patient needs. The provider has delivered many of the services listed below to Medicare patients. Please note that this list does not include services provided to patients who are not covered by Medicare.
Administration of influenza virus vaccine
Administration of pneumococcal vaccine
Advance care planning, first 30 minutes
Annual depression screening, 15 minutes
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit
Established patient office or other outpatient visit, 10-19 minutes
Established patient office or other outpatient visit, 20-29 minutes
Established patient office or other outpatient visit, 30-39 minutes
Influenza vaccine, quadrivalent derived from cell cultures
Influenza vaccine, quadrivalent derived from cell cultures, preservative and antibiotic free
Injection of drug or substance under skin or into muscle
New patient office or other outpatient visit, 45-59 minutes
Pneumococcal vaccine, 13-valent
Pneumococcal vaccine, 23-valent
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report
Telephone medical discussion with physician, 5-10 minutes
Urinalysis, manual test
The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.
This service was performed 57 times for 57 patientsThe pneumococcal vaccine helps protect against pneumococcal bacteria, which can cause severe infections like pneumonia and meningitis. The vaccine is given as an injection, typically in the arm. It's recommended for infants, older adults, and those with certain health conditions.
This service was performed 32 times for 32 patientsAdvance care planning is a process where you discuss your healthcare preferences with your doctor. This conversation, lasting up to 30 minutes, helps ensure your wishes are respected if you're unable to communicate them in the future. It's about your care, your way.
This service was performed 72 times for 72 patientsAn annual depression screening is a short, routine evaluation to check for signs of depression. It involves answering a series of questions about your feelings, thoughts, and behaviors. The process takes about 15 minutes and helps detect depression early for better management.
This service was performed 47 times for 47 patientsAn annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
This service was performed 59 times for 59 patientsThis is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.
This service was performed 57 times for 47 patientsThis is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
This service was performed 196 times for 124 patientsThis 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.
This service was performed 205 times for 134 patientsThe quadrivalent influenza vaccine, derived from cell cultures, is a flu shot that protects against four different flu viruses. It's made in labs using cell cultures instead of eggs, making it a good option for those with egg allergies. It's a crucial tool in preventing the flu.
This service was performed 41 times for 41 patientsThe quadrivalent influenza vaccine is a flu shot that protects against four different flu viruses. Derived from cell cultures, it is free of preservatives and antibiotics. It's a safe and effective way to reduce your risk of getting the flu.
This service was performed 14 times for 14 patientsThis procedure involves administering medication directly under the skin or into a muscle. A small needle is used to inject the drug, allowing it to be absorbed quickly into the bloodstream. It's a common method for delivering a variety of medications.
This service was performed 43 times for 27 patientsThis is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
This service was performed 23 times for 23 patientsThe 13-valent pneumococcal vaccine is a shot that helps protect against 13 types of bacteria that can cause serious infections like pneumonia and meningitis. It's often recommended for children under 2 and adults over 65, or people with certain health conditions.
This service was performed 13 times for 13 patientsThe 23-valent pneumococcal vaccine is an injection that helps protect against serious infections caused by 23 types of pneumococcal bacteria. It's vital for those at risk, like older adults or people with certain health conditions, to prevent pneumonia, meningitis, and bloodstream infections.
This service was performed 11 times for 11 patientsAn 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.
This service was performed 35 times for 35 patientsA telephone medical discussion with a physician is a brief, 5-10 minute call where you can discuss your health concerns. It's a convenient way to receive medical advice without needing to visit a clinic. It's important to prepare questions in advance to make the most of this time.
This service was performed 160 times for 97 patientsA urinalysis is a simple, non-invasive test that checks the urine for various elements such as sugar, protein, and signs of infection. It can help detect many common conditions, including kidney disease and diabetes. The manual test involves a lab technician examining a urine sample.
This service was performed 13 times for 12 patientsReviews for DR. JOSEPH D CHUN M.D.
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NPI NPI Number Validation
How NPI Validation Works
The NPI validation process uses the ISO-standard Luhn algorithm, a mathematical "handshake", to ensure that a provider's 10-digit ID is authentic and free of common typing errors.
To verify the NPI 1710015425, we treat the final digit (5) as the Check Digit—the target answer we need to reach. The process begins by taking the first nine digits and adding a constant value of 24, which accounts for the "80840" prefix required for all U.S. health identifiers. We then double every other digit starting from the right and sum the individual digits of those results together. For this specific NPI, that total comes to 45. The final step is to find the difference between that total and the next multiple of ten (50 - 45 = 5).
Digit-by-digit view
Use the first nine digits for the calculation. Starting from the right, double every other digit. The last digit is the check digit and is not part of the calculation.
Step 1: Double every other digit from the right
Starting with the rightmost digit of the first nine digits, double every other value. If doubling creates a two-digit number, add those digits together.
Step 2: Add all digits plus the NPI constant
Add the transformed values, the unchanged digits, and the constant 24.
Step 3: Find the amount needed to reach the next multiple of 10
The next multiple of ten after 45 is 50. The difference is the calculated check digit.
Other Providers at the Same Location
The following 6 providers are registered at the same or a nearby location.
FULLERTON, CA 92833
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1710015425, enumerated as an "individual" on March 02, 2007.
The provider is located at 1501 W COMMONWEALTH AVE FULLERTON, CA 92833 and the phone number is (714) 410-3100.
Allergy & Immunology with taxonomy code 207K00000X.
The provider might be accepting Accepts: Medicare and Medicaid. Please consult your insurance carrier or call the provider to verify.