DEAN G. KARDASSAKIS MD
NPI 1811906571
Allergy & Immunology - Allergy in San Francisco, CA

NPI Status: Active since August 05, 2006

Contact Information

450 SUTTER ST RM 933
SAN FRANCISCO, CA
ZIP 94108
Phone: (415) 362-5443

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  • Individual
  • Male
  • Years of Experience 41
  • Allergy & Immunology
  • Allergy
  • Accepts Medicare Approved Payment
  • PECOS Enrolled

About DEAN KARDASSAKIS

This page provides the complete NPI Profile along with additional information for Dean Kardassakis, a provider established in San Francisco, California with a medical specialization in Allergy & Immunology, focusing in allergy and more than 41 years of experience. He graduated from University Of Nevada School Of Medicine in 1985. The healthcare provider is registered in the NPI registry with number 1811906571 assigned on August 2006. The practitioner's primary taxonomy code is 207KA0200X with license number G62905 (CA). The provider is registered as an individual and his NPI record was last updated December 2025.

NPI
1811906571
Provider Name
DEAN G. KARDASSAKIS MD
Gender
Male
Entity Type
Individual
Location Address
450 SUTTER ST RM 933 SAN FRANCISCO, CA 94108
Location Phone
(415) 362-5443
Mailing Address
275 W MACARTHUR BLVD OAKLAND, CA 94611
Mailing Phone
(510) 752-1000
Mailing Fax
Medical School Name
UNIVERSITY OF NEVADA SCHOOL OF MEDICINE
Graduation Year
1985
Is Sole Proprietor?
No
Enumeration Date
08-05-2006
Last Update Date
12-16-2025
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Location Map

Secondary Locations

  • 275 W MacArthur
    Oakland, CA 94611
    (510) 752-1000

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 Allergy

Taxonomy Code
207KA0200X
Type
Allopathic & Osteopathic Physicians
License No.
G62905
License State
CA
Taxonomy Description
A physician who specializes in the diagnosis, treatment, and management of allergies. Source: National Uniform Claim Committee

Medicare Participation & PECOS Enrollment Status

Dean Kardassakis 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.

Dean Kardassakis 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: 2567442791

    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: I20040720001159

    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

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.

Established patient office or other outpatient visit, 30-39 minutes

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.

This service was performed 49 times for 28 patients

New patient office or other outpatient visit, 45-59 minutes

This 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 26 times for 26 patients

Test for allergy using allergenic extract

An allergy test with allergenic extract is a diagnostic method to identify substances causing allergic reactions. Small amounts of common allergens are introduced to your body, usually through skin pricks or blood tests. Your body's response helps determine your allergies.

This service was performed 796 times for 12 patients

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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 1811906571, we treat the final digit (1) 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 59. The final step is to find the difference between that total and the next multiple of ten (60 - 59 = 1).

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.

Pos 1
1
Doubled → 2
Pos 2
8
Unchanged
Pos 3
1
Doubled → 2
Pos 4
1
Unchanged
Pos 5
9
Doubled → 18 → 1 + 8
Pos 6
0
Unchanged
Pos 7
6
Doubled → 12 → 1 + 2
Pos 8
5
Unchanged
Pos 9
7
Doubled → 14 → 1 + 4
Check
1
Target digit
Regular digit Doubled digit Check digit

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.

1 → 2 1 → 2 9 → 18 → 9 6 → 12 → 3 7 → 14 → 5

Step 2: Add all digits plus the NPI constant

Add the transformed values, the unchanged digits, and the constant 24.

2 + 8 + 2 + 1 + 1 + 8 + 0 + 1 + 2 + 5 + 1 + 4 + 24 = 59

Step 3: Find the amount needed to reach the next multiple of 10

The next multiple of ten after 59 is 60. The difference is the calculated check digit.

60 - 59 = 1
This NPI is valid
The calculated check digit is 1, which matches the last digit of 1811906571.

Other Providers at the Same Location


The following 13 providers are registered at the same or a nearby location.

Otolaryngology
450 SUTTER ST RM 933, STE 933
SAN FRANCISCO, CA 94108
Otolaryngology
450 SUTTER ST RM 933, STE 933
SAN FRANCISCO, CA 94108
Otolaryngology
450 SUTTER ST RM 933
SAN FRANCISCO, CA 94108
Otolaryngology
450 SUTTER ST RM 933
SAN FRANCISCO, CA 94108
Allergy & Immunology
450 SUTTER ST RM 933
SAN FRANCISCO, CA 94108
Speech-Language Pathologist
450 SUTTER ST RM 933
SAN FRANCISCO, CA 94108
Otolaryngology
450 SUTTER ST RM 933
SAN FRANCISCO, CA 94108
Audiologist
450 SUTTER ST RM 933
SAN FRANCISCO, CA 94108
Otolaryngology
450 SUTTER ST RM 933
SAN FRANCISCO, CA 94108
Speech-Language Pathologist
450 SUTTER ST RM 933
SAN FRANCISCO, CA 94108
Otolaryngology
450 SUTTER ST RM 933
SAN FRANCISCO, CA 94108
Pediatrics
450 SUTTER ST RM 933
SAN FRANCISCO, CA 94108
Pediatrics (Pediatric Allergy/Immunology)
450 SUTTER ST RM 933
SAN FRANCISCO, CA 94108

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1811906571, enumerated as an "individual" on August 05, 2006.

The provider is located at 450 SUTTER ST RM 933 SAN FRANCISCO, CA 94108 and the phone number is (415) 362-5443.

Allergy & Immunology with taxonomy code 207KA0200X and a focus in Allergy.