DR. GRANT ROGER MASAOKA M.D.
NPI 1780677120
Specialist in Anaheim, CA

NPI Status: Active since August 30, 2005

Contact Information

1781 W ROMNEYA DR
SUITE E
ANAHEIM, CA
ZIP 92801
Phone: (714) 774-0414
Fax: (714) 774-0494

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  • Individual
  • Male
  • Specialist
  • CLIA Number: 05D1012354
  • CLIA Cert. Type: Physician Office
  • CLIA Exp. Date: 05-07-2027

About GRANT MASAOKA

This page provides the complete NPI Profile along with additional information for Grant Masaoka, a provider established in Anaheim, California with a medical specialization in Specialist. The healthcare provider is registered in the NPI registry with number 1780677120 assigned on August 2005. The practitioner's primary taxonomy code is 174400000X with license number G19094 (CA). The provider is registered as an individual and his NPI record was last updated 19 years ago.

NPI
1780677120
Provider Name
DR. GRANT ROGER MASAOKA M.D.
Gender
Male
Entity Type
Individual
Location Address
1781 W ROMNEYA DR SUITE E ANAHEIM, CA 92801
Location Phone
(714) 774-0414
Location Fax
(714) 774-0494
Mailing Address
1781 W ROMNEYA DR SUITE E ANAHEIM, CA 92801
Mailing Phone
(714) 774-0414
Mailing Fax
(714) 774-0494
Is Sole Proprietor?
Yes
Enumeration Date
08-30-2005
Last Update Date
07-09-2007
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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

Specialist

Taxonomy Code
174400000X
Type
Other Service Providers
License No.
G19094
License State
CA
Taxonomy Description
An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.

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
00G190940MEDICAID (05)CA 
H18039MEDICARE UPIN (02)CA 

CLIA Information

The Clinical Laboratory Improvement Amendments (CLIA) of 1988 applies to facilities or sites that test human specimens for health assessment or to diagnose, prevent, or treat disease. The CLIA Program sets standards for clinical laboratory testing and issues certificates. The NPI / CLIA crosswalk information for this NPI number is:

CLIA Number
05D1012354
Facility Type
Physician Office
Certificate Effective Date
May 08, 2025
Certificate Expiration Date
May 07, 2027
Laboratory Director
JAMILA MOUCHARRAFIE
Certificate Type
Certificate of Waiver
Certificate Type Description
This CLIA certificate is issued to Grant Masaoka to perform only waived tests. CLIA defines waived tests as simple tests with a low risk for an incorrect result. Waived tests include certain tests listed in CLIA regulations, tests cleared by the FDA for home use and tests approved by the FDA for waived status and that meet CLIA waiver criteria.

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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 1780677120, we treat the final digit (0) 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 60. The final step is to find the difference between that total and the next multiple of ten (60 - 60 = 0).

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
7
Unchanged
Pos 3
8
Doubled → 16 → 1 + 6
Pos 4
0
Unchanged
Pos 5
6
Doubled → 12 → 1 + 2
Pos 6
7
Unchanged
Pos 7
7
Doubled → 14 → 1 + 4
Pos 8
1
Unchanged
Pos 9
2
Doubled → 4
Check
0
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 8 → 16 → 7 6 → 12 → 3 7 → 14 → 5 2 → 4

Step 2: Add all digits plus the NPI constant

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

2 + 7 + 1 + 6 + 0 + 1 + 2 + 7 + 1 + 4 + 1 + 4 + 24 = 60

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

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

60 - 60 = 0
This NPI is valid
The calculated check digit is 0, which matches the last digit of 1780677120.

Other Providers at the Same Location


The following 12 providers are registered at the same or a nearby location.

Internal Medicine
1781 W ROMNEYA DR, STE B
ANAHEIM, CA 92801
Internal Medicine (Cardiovascular Disease)
1781 W ROMNEYA DR, STE B
ANAHEIM, CA 92801
Internal Medicine (Cardiovascular Disease)
1781 W ROMNEYA DR, STE B
ANAHEIM, CA 92801
Surgery
1781 W ROMNEYA DR, SUITE G
ANAHEIM, CA 92801
Family Medicine
1781 W ROMNEYA DR
ANAHEIM, CA 92801
Acupuncturist
1781 W ROMNEYA DR, # F
ANAHEIM, CA 92801
Acupuncturist
1781 W ROMNEYA DR, SUITE I
ANAHEIM, CA 92801
Dentist
1781 W ROMNEYA DR
ANAHEIM, CA 92801
Internal Medicine
1781 W ROMNEYA DR, STE C
ANAHEIM, CA 92801
Podiatrist (Foot Surgery)
1781 W ROMNEYA DR, SUITE I
ANAHEIM, CA 92801
Podiatrist
1781 W ROMNEYA DR, SUITE I
ANAHEIM, CA 92801
Nurse Practitioner (Psychiatric/Mental Health)
1781 W ROMNEYA DR
ANAHEIM, CA 92801

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1780677120, enumerated as an "individual" on August 30, 2005.

The provider is located at 1781 W ROMNEYA DR SUITE E ANAHEIM, CA 92801 and the phone number is (714) 774-0414.

Specialist with taxonomy code 174400000X.

The provider might be accepting Accepts: Medicare and Medicaid. Please consult your insurance carrier or call the provider to verify.