JOHNNA TANJI AU.D.
NPI 1225539422
Audiologist-Hearing Aid Fitter in San Jose, CA

NPI Status: Active since February 22, 2018

Contact Information

200 JOSE FIGUERES AVE STE 280
SAN JOSE, CA
ZIP 95116
Phone: (408) 937-8900

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NPPES record last updated: December 13, 2023. Verified against the NPPES registry weekly; last sync: July 12, 2026.

Record update history: Dec 13, 2023, Dec 3, 2021, Feb 22, 2018 (3 updates tracked since 2018).

  • Individual
  • Female
  • Years of Experience 12
  • Audiologist-Hearing Aid Fitter
  • May Accept Medicare Approved Payment

About JOHNNA TANJI

This page provides the complete NPI Profile along with additional information for Johnna Tanji, a provider established in San Jose, California with a medical specialization in Audiologist-hearing Aid Fitter and more than 12 years of experience. The healthcare provider is registered in the NPI registry with number 1225539422 assigned on February 2018. The practitioner's primary taxonomy code is 237600000X with license number AU3316 (CA). The provider is registered as an individual and her NPI record was last updated 3 years ago.

NPI
1225539422
Provider Name
JOHNNA TANJI AU.D.
Gender
Female
Entity Type
Individual
Location Address
200 JOSE FIGUERES AVE STE 280 SAN JOSE, CA 95116
Location Phone
(408) 937-8900
Mailing Address
2010 EL CAMINO REAL STE 723 SANTA CLARA, CA 95050
Mailing Phone
(808) 348-6860
Medical School Name
OTHER
Graduation Year
2015
Is Sole Proprietor?
No
Enumeration Date
02-22-2018
Last Update Date
12-13-2023
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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

Audiologist-Hearing Aid Fitter

Taxonomy Code
237600000X
Type
Speech, Language and Hearing Service Providers
License No.
AU3316
License State
CA
Taxonomy Description
An audiologist/hearing aid fitter is the professional who specializes in evaluating and treating people with hearing loss, conducts a wide variety of tests to determine the exact nature of an individual's hearing problem, presents a variety of treatment options to patients, dispenses and fits hearing aids, administers tests of balance to evaluate dizziness and provides hearing rehabilitation training. This classification should be used where individuals are licensed as audiologist-hearing aid fitters as opposed to states that license individuals as audiologists.

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)
1231H00000XSpeech, Language and Hearing Service Providers

Audiologist

AU3316 (CA)
2231HA2400XSpeech, Language and Hearing Service Providers

Audiologist
Assistive Technology Practitioner

AU3316 (CA)

Medicare Participation & PECOS Enrollment Status

Johnna Tanji is registered with Medicare but may not accept claims assignment. If you are a Medicare beneficiary call and confirm with the provider before seeking any services.

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.

  • PECOS PAC ID: 5193077329

    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: I20181016002015

    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? Maybe

    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.

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.

Comprehensive hearing and speech recognition test

A comprehensive hearing and speech recognition test assesses your ability to hear and understand spoken words. It includes hearing tests to check for issues with sound perception and speech tests to evaluate your word recognition. It's a crucial step in identifying any hearing or speech problems.

This service was performed 392 times for 392 patients

Placement of ear probe for computerized measurement of repeated sounds with interpretation and report

This procedure involves placing a probe in your ear to measure how it responds to repeated sounds. The data is then interpreted by a computer to assess your hearing health. The findings are compiled into a report for further evaluation.

This service was performed 227 times for 227 patients

Test for eardrum and muscle function

This test assesses the health of your eardrum and muscles linked to hearing. A small device is placed in your ear that creates pressure changes and sounds. Your ear's responses are recorded to determine if they are functioning properly.

This service was performed 291 times for 291 patients

Test to assess middle ear function

A test to assess middle ear function, also known as an impedance audiometry, helps evaluate how well your middle ear works. It measures the movement of your eardrum in response to changes in air pressure. This can help identify issues like fluid build-up, ear infections, or eardrum perforations.

This service was performed 96 times for 96 patients

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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 1225539422, we treat the final digit (2) 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 58. The final step is to find the difference between that total and the next multiple of ten (60 - 58 = 2).

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
2
Unchanged
Pos 3
2
Doubled → 4
Pos 4
5
Unchanged
Pos 5
5
Doubled → 10 → 1 + 0
Pos 6
3
Unchanged
Pos 7
9
Doubled → 18 → 1 + 8
Pos 8
4
Unchanged
Pos 9
2
Doubled → 4
Check
2
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 2 → 4 5 → 10 → 1 9 → 18 → 9 2 → 4

Step 2: Add all digits plus the NPI constant

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

2 + 2 + 4 + 5 + 1 + 0 + 3 + 1 + 8 + 4 + 4 + 24 = 58

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

The next multiple of ten after 58 is 60. The difference is the calculated check digit.

60 - 58 = 2
This NPI is valid
The calculated check digit is 2, which matches the last digit of 1225539422.

Other Providers at the Same Location


The following 6 providers are registered at the same or a nearby location.

Hearing Instrument Specialist
200 JOSE FIGUERES AVE STE 280
SAN JOSE, CA 95116
Audiologist
200 JOSE FIGUERES AVE STE 280
SAN JOSE, CA 95116
Audiologist-Hearing Aid Fitter
200 JOSE FIGUERES AVE STE 280
SAN JOSE, CA 95116
Audiologist
200 JOSE FIGUERES AVE STE 280
SAN JOSE, CA 95116
Audiologist-Hearing Aid Fitter
200 JOSE FIGUERES AVE STE 280
SAN JOSE, CA 95116
Hearing Instrument Specialist
200 JOSE FIGUERES AVE STE 280
SAN JOSE, CA 95116

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1225539422, enumerated as an "individual" on February 22, 2018.

The provider is located at 200 JOSE FIGUERES AVE STE 280 SAN JOSE, CA 95116 and the phone number is (408) 937-8900.

Audiologist-Hearing Aid Fitter with taxonomy code 237600000X.