MATTHEW BARON
NPI 1558958389
Student in an Organized Health Care Education/Training Program in Corte Madera, CA

NPI Status: Active since December 28, 2020

Contact Information

21 TAMAL VISTA BLVD STE 240
CORTE MADERA, CA
ZIP 94925
Phone: (415) 949-0124

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NPPES record last updated: December 28, 2020. Verified against the NPPES registry weekly; last sync: July 12, 2026.

  • Individual
  • Male
  • Student in an Organized Health Care Educ...
  • Opted-Out Medicare

About MATTHEW BARON

This page provides the complete NPI Profile along with additional information for Matthew Baron, a primary care provider established in Corte Madera, California with a medical specialization in Student In An Organized Health Care Education/training Program. The healthcare provider is registered in the NPI registry with number 1558958389 assigned on December 2020. The practitioner's primary taxonomy code is 390200000X. The provider is registered as an individual and his NPI record was last updated 6 years ago.

NPI
1558958389
Provider Name
MATTHEW BARON
Gender
Male
Entity Type
Individual
Location Address
21 TAMAL VISTA BLVD STE 240 CORTE MADERA, CA 94925
Location Phone
(415) 949-0124
Mailing Address
PO BOX 804 WOODACRE, CA 94973
Is Sole Proprietor?
No
Enumeration Date
12-28-2020
Last Update Date
12-28-2020
Code Navigator

A primary care provider (PCP) like Matthew Baron sees people with common medical problems. The primary care provider might be a doctor, physician assistant, nurse practitioner or clinic that are usually involved in your long-term care. A PCP might provide preventive care, treat common medical conditions, identify urgent medical problems and refer you to specialists when necessary. Primary care is usually provided in an outpatient facility but if you are admitted to a hospital your PCP may assist in your care. The most common medical conditions seen by primary care providers are: hypertension, upper respiratory tract infections, depression or anxiety, back pain, arthritis, dermatitis, diabetes, urinary tract infections, etc .

The provider doesn't accept Medicare and has signed an affidavit to be excluded from the Medicare program. If you are a Medicare beneficiary this means a provider can charge whatever they want for services rendered but must follow certain rules to do so. Matthew Baron opted out of Medicare effective on 03-03-2025 until 03-03-2027. Opt out periods last for two years and cannot be terminated unless the provider is opting out for the very first time and the affidavit is terminated no later than 90 days after the opt out effective date. Opt-out affidavits might renew automatically renew every two years. The provider opted out of Medicare and cannot order and refer services to other healthcare providers.

Location Map

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

Student in an Organized Health Care Education/Training Program

Taxonomy Code
390200000X
Type
Student, Health Care
Taxonomy Description
An individual who is enrolled in an organized health care education/training program leading to a degree, certification, registration, and/or licensure to provide health care.

Medicare Participation & PECOS Enrollment Status

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.

  • Opted-Out of Medicare? Yes

  • Opt-Out Effective Date: 03-03-2025

  • Opt-Out End Date: 03-03-2027

  • Eligible to Order and Refer? No

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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 1558958389, we treat the final digit (9) 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 71. The final step is to find the difference between that total and the next multiple of ten (80 - 71 = 9).

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
5
Unchanged
Pos 3
5
Doubled → 10 → 1 + 0
Pos 4
8
Unchanged
Pos 5
9
Doubled → 18 → 1 + 8
Pos 6
5
Unchanged
Pos 7
8
Doubled → 16 → 1 + 6
Pos 8
3
Unchanged
Pos 9
8
Doubled → 16 → 1 + 6
Check
9
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 5 → 10 → 1 9 → 18 → 9 8 → 16 → 7 8 → 16 → 7

Step 2: Add all digits plus the NPI constant

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

2 + 5 + 1 + 0 + 8 + 1 + 8 + 5 + 1 + 6 + 3 + 1 + 6 + 24 = 71

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

The next multiple of ten after 71 is 80. The difference is the calculated check digit.

80 - 71 = 9
This NPI is valid
The calculated check digit is 9, which matches the last digit of 1558958389.

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1558958389, enumerated as an "individual" on December 28, 2020.

The provider is located at 21 TAMAL VISTA BLVD STE 240 CORTE MADERA, CA 94925 and the phone number is (415) 949-0124.

Student in an Organized Health Care Education/Training Program with taxonomy code 390200000X.