MATTHEW W DAVIS
NPI 1821963661
Student in an Organized Health Care Education/Training Program in Boston, MA

NPI Status: Active since October 10, 2025

Contact Information

221 LONGWOOD AVE
BOSTON, MA
ZIP 02115
Phone: (614) 273-5370

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  • Individual
  • Male
  • Student in an Organized Health Care Educ...

About MATTHEW DAVIS

This page provides the complete NPI Profile along with additional information for Matthew Davis, a primary care provider established in Boston, Massachusetts 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 1821963661 assigned on October 2025. The practitioner's primary taxonomy code is 390200000X. The provider is registered as an individual and his NPI record was last updated one year ago.

NPI
1821963661
Provider Name
MATTHEW W DAVIS
Gender
Male
Entity Type
Individual
Location Address
221 LONGWOOD AVE BOSTON, MA 02115
Location Phone
(614) 273-5370
Mailing Address
221 LONGWOOD AVE BOSTON, MA 02115
Is Sole Proprietor?
Yes
Enumeration Date
10-10-2025
Last Update Date
10-10-2025
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A primary care provider (PCP) like Matthew Davis 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 .

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
License State
MA
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.

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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 1821963661, 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 69. The final step is to find the difference between that total and the next multiple of ten (70 - 69 = 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
2
Doubled → 4
Pos 4
1
Unchanged
Pos 5
9
Doubled → 18 → 1 + 8
Pos 6
6
Unchanged
Pos 7
3
Doubled → 6
Pos 8
6
Unchanged
Pos 9
6
Doubled → 12 → 1 + 2
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 2 → 4 9 → 18 → 9 3 → 6 6 → 12 → 3

Step 2: Add all digits plus the NPI constant

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

2 + 8 + 4 + 1 + 1 + 8 + 6 + 6 + 6 + 1 + 2 + 24 = 69

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

The next multiple of ten after 69 is 70. The difference is the calculated check digit.

70 - 69 = 1
This NPI is valid
The calculated check digit is 1, which matches the last digit of 1821963661.

Other Providers at the Same Location


The following 20 providers are registered at the same or a nearby location.

Internal Medicine (Endocrinology, Diabetes & Metabolism)
221 LONGWOOD AVE
BOSTON, MA 02115
Psychiatry & Neurology (Psychiatry)
221 LONGWOOD AVE, MEZZANINE DEPT OF PSYCHIATRY
BOSTON, MA 02115
Psychiatry & Neurology (Neurology)
221 LONGWOOD AVE
BOSTON, MA 02115
Psychiatry & Neurology (Neurology)
221 LONGWOOD AVE
BOSTON, MA 02115
Internal Medicine (Endocrinology, Diabetes & Metabolism)
221 LONGWOOD AVE, RFB2, ENDOCRINOLOGY DIABETES AND HYPERTENSION
BOSTON, MA 02115
Clinical Neuropsychologist
221 LONGWOOD AVE, BRIGHAM BEHAVIORAL NEUROLOGY GROUP
BOSTON, MA 02115
Psychologist
221 LONGWOOD AVE, BRIGHAM BEHAVIROAL NEUROLOGY
BOSTON, MA 02115
Psychiatry & Neurology (Psychiatry)
221 LONGWOOD AVE, BRIGHAM AND WOMENS HOSPITAL DEPARTMENT OF PSYCHIATRY
BOSTON, MA 02115
Internal Medicine (Endocrinology, Diabetes & Metabolism)
221 LONGWOOD AVE, BRIGHAM AND WOMEN HOSPITAL ENDOCRINOLOGY DIABETES
BOSTON, MA 02115
Psychiatry & Neurology (Psychiatry)
221 LONGWOOD AVE, 4TH FL/PSYCHIATRY
BOSTON, MA 02115
Psychiatry & Neurology (Psychiatry)
221 LONGWOOD AVE
BOSTON, MA 02115
Psychiatry & Neurology (Psychiatry)
221 LONGWOOD AVE, RF-M56
BOSTON, MA 02115
Obstetrics & Gynecology (Gynecology)
221 LONGWOOD AVE, BRIGHAM AND WOMENS HOSP DEPT OF OBSTETRICS AND GYNECOLO
BOSTON, MA 02115
Psychiatry & Neurology (Psychiatry)
221 LONGWOOD AVE, BRIGHAM AND WOMENS HOSPITAL
BOSTON, MA 02115
Dermatology
221 LONGWOOD AVE
BOSTON, MA 02115
Psychiatry & Neurology (Neurology)
221 LONGWOOD AVE, M80
BOSTON, MA 02115
Psychiatry & Neurology (Psychiatry)
221 LONGWOOD AVE, BRIGHAM PSYCHIATRIC SPECIALTIES, 4TH FLOOR
BOSTON, MA 02115
Nurse Practitioner (Adult Health)
221 LONGWOOD AVE
BOSTON, MA 02115
Psychologist (Clinical)
221 LONGWOOD AVE, BWH PSYCHIATRY MEZZ.
BOSTON, MA 02115
Specialist
221 LONGWOOD AVE
BOSTON, MA 02115

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1821963661, enumerated as an "individual" on October 10, 2025.

The provider is located at 221 LONGWOOD AVE BOSTON, MA 02115 and the phone number is (614) 273-5370.

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