CAITLIN KEENAN MD
NPI 1518600410
Internal Medicine - Hematology & Oncology in Boston, MA

NPI Status: Active since April 18, 2022

Contact Information

860 WASHINGTON ST
BOSTON, MA
ZIP 02111
Phone: (617) 636-5291

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  • Individual
  • Female
  • Internal Medicine
  • Hematology & Oncology

About CAITLIN KEENAN

This page provides the complete NPI Profile along with additional information for Caitlin Keenan, an internist established in Boston, Massachusetts with a medical specialization in Internal Medicine, focusing in hematology & oncology . The healthcare provider is registered in the NPI registry with number 1518600410 assigned on April 2022. The practitioner's primary taxonomy code is 207RH0003X with license number 3018092 (MA). The provider is registered as an individual and her NPI record was last updated one year ago.

NPI
1518600410
Provider Name
CAITLIN KEENAN MD
Gender
Female
Entity Type
Individual
Location Address
860 WASHINGTON ST BOSTON, MA 02111
Location Phone
(617) 636-5291
Mailing Address
860 WASHINGTON ST BOSTON, MA 02111
Is Sole Proprietor?
No
Enumeration Date
04-18-2022
Last Update Date
07-16-2025
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An internist like Caitlin Keenan 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 Hematology & Oncology

Taxonomy Code
207RH0003X
Type
Allopathic & Osteopathic Physicians
License No.
3018092
License State
MA
Taxonomy Description
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.

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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 1518600410, 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 50. The final step is to find the difference between that total and the next multiple of ten (50 - 50 = 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
5
Unchanged
Pos 3
1
Doubled → 2
Pos 4
8
Unchanged
Pos 5
6
Doubled → 12 → 1 + 2
Pos 6
0
Unchanged
Pos 7
0
Doubled → 0
Pos 8
4
Unchanged
Pos 9
1
Doubled → 2
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 1 → 2 6 → 12 → 3 0 → 0 1 → 2

Step 2: Add all digits plus the NPI constant

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

2 + 5 + 2 + 8 + 1 + 2 + 0 + 0 + 4 + 2 + 24 = 50

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

The next multiple of ten after 50 is 50. The difference is the calculated check digit.

50 - 50 = 0
This NPI is valid
The calculated check digit is 0, which matches the last digit of 1518600410.

Other Providers at the Same Location


The following 9 providers are registered at the same or a nearby location.

Audiologist
860 WASHINGTON ST
BOSTON, MA 02111
Social Worker (Clinical)
860 WASHINGTON ST
BOSTON, MA 02111
Otolaryngology
860 WASHINGTON ST
BOSTON, MA 02111
Physician Assistant
860 WASHINGTON ST
BOSTON, MA 02111
Physician Assistant
860 WASHINGTON ST
BOSTON, MA 02111
Radiology (Diagnostic Radiology)
860 WASHINGTON ST
BOSTON, MA 02111
Thoracic Surgery (Cardiothoracic Vascular Surgery)
860 WASHINGTON ST
BOSTON, MA 02111
Otolaryngology (Otolaryngology/Facial Plastic Surgery)
860 WASHINGTON ST
BOSTON, MA 02111
Internal Medicine (Gastroenterology)
860 WASHINGTON ST, SOUTH BUILDING 4TH FLOOR
BOSTON, MA 02111

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1518600410, enumerated as an "individual" on April 18, 2022.

The provider is located at 860 WASHINGTON ST BOSTON, MA 02111 and the phone number is (617) 636-5291.

Internal Medicine with taxonomy code 207RH0003X and a focus in Hematology & Oncology.