Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

REBECA ESTHER VERGARA GREENO MD
NPI 1669167839
Internal Medicine in Boston, MA

Active since April 05, 2023
75 FRANCIS ST, BOSTON, MA 02115(617) 732-5500 Get Directions Write a Review

NPPES record last updated: July 3, 2026. Verified against the NPPES registry weekly; last sync: July 19, 2026.

  • Individual
  • Female
  • Internal Medicine

About REBECA VERGARA GREENO

This page provides the complete NPI Profile along with additional information for Rebeca Vergara Greeno, an internist established in Boston, Massachusetts with a medical specialization in Internal Medicine. The healthcare provider is registered in the NPI registry with number 1669167839 assigned on April 2023. The practitioner's primary taxonomy code is 207R00000X with license number 1015745 (MA). The provider is registered as an individual and her NPI record was last updated July 2026.

NPI
1669167839
Provider Name
REBECA ESTHER VERGARA GREENO MD
Gender
Female
Entity Type
Individual
Location Address
75 FRANCIS ST BOSTON, MA 02115
Location Phone
(617) 732-5500
Mailing Address
55 FRUIT ST BOSTON, MA 02114
Is Sole Proprietor?
No
Enumeration Date
04-05-2023
Last Update Date
07-03-2026
Code Navigator

An internist like Rebeca Vergara Greeno is a physician who has completed an internal medicine residency and is board-certified or board-eligible in an internist specialty. Internists are trained to care for adults of all ages for many different medical conditions. An internist typically monitors chronic physical conditions, identifies acute diseases, provides family planning, provides counseling about wellness and disease prevention, 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

Internal Medicine

Taxonomy Code
207R00000X
Type
Allopathic & Osteopathic Physicians
License No.
1015745
License State
MA
Taxonomy Description
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

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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 1669167839, 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
6
Unchanged
Pos 3
6
Doubled → 12 → 1 + 2
Pos 4
9
Unchanged
Pos 5
1
Doubled → 2
Pos 6
6
Unchanged
Pos 7
7
Doubled → 14 → 1 + 4
Pos 8
8
Unchanged
Pos 9
3
Doubled → 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 6 → 12 → 3 1 → 2 7 → 14 → 5 3 → 6

Step 2: Add all digits plus the NPI constant

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

2 + 6 + 1 + 2 + 9 + 2 + 6 + 1 + 4 + 8 + 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 1669167839.

Other Providers at the Same Location


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

Internal Medicine (Pulmonary Disease)
75 FRANCIS ST, BRIGHAM & WOMEN'S HOSPITAL, PULMONARY & CRITICAL CARE
BOSTON, MA 02115
Anesthesiology
75 FRANCIS ST, DEPARTMENT OF ANESTHESIOLOGY CWN L2
BOSTON, MA 02115
Physician Assistant
75 FRANCIS ST
BOSTON, MA 02115
Radiology (Diagnostic Radiology)
75 FRANCIS ST
BOSTON, MA 02115
Radiology (Diagnostic Radiology)
75 FRANCIS ST, RADIOLOGY, BRIGHAM AND WOMEN'S HOSPITAL
BOSTON, MA 02115
Internal Medicine (Pulmonary Disease)
75 FRANCIS ST, PULMONARY DIVISION BRIGHAM AND WOMEN'S HOSPITAL
BOSTON, MA 02115
Obstetrics & Gynecology (Gynecologic Oncology)
75 FRANCIS ST, BRIGHAM AND WOMEN'S HOSPITAL
BOSTON, MA 02115
Thoracic Surgery (Cardiothoracic Vascular Surgery)
75 FRANCIS ST
BOSTON, MA 02115
Internal Medicine (Cardiovascular Disease)
75 FRANCIS ST
BOSTON, MA 02115
Internal Medicine (Cardiovascular Disease)
75 FRANCIS ST
BOSTON, MA 02115
Internal Medicine (Rheumatology)
75 FRANCIS ST
BOSTON, MA 02115
Internal Medicine (Pulmonary Disease)
75 FRANCIS ST, PBB CLINICS-3
BOSTON, MA 02115
Internal Medicine (Cardiovascular Disease)
75 FRANCIS ST, CARDIOVASCULAR DIVISION, BRIGHAM AND WOMEN'S HOSPITAL
BOSTON, MA 02115
Internal Medicine
75 FRANCIS ST
BOSTON, MA 02115
Internal Medicine (Gastroenterology)
75 FRANCIS ST, DIVISION OF GASTROENTEROLOGY, HEPATOLOGY & ENDOSCOPY
BOSTON, MA 02115
Psychiatry & Neurology (Psychiatry)
75 FRANCIS ST, DEPARTMENT OF PSYCHIATRY
BOSTON, MA 02115
Internal Medicine (Cardiovascular Disease)
75 FRANCIS ST, CARDIOVASCULAR DIVISION
BOSTON, MA 02115
Anesthesiology
75 FRANCIS ST, BWH BRIGHAM & WOMENS HOSPITAL
BOSTON, MA 02115
Surgery
75 FRANCIS ST, BRIGHAM AND WOMEN'S HOSPITAL - ADMINISTRATION
BOSTON, MA 02115
Internal Medicine
75 FRANCIS ST, BRIGHAM AND WOMENS HOSPITAL
BOSTON, MA 02115

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1669167839, enumerated as an "individual" on April 05, 2023.

The provider is located at 75 FRANCIS ST BOSTON, MA 02115 and the phone number is (617) 732-5500.

Internal Medicine with taxonomy code 207R00000X.