DR. STEPHEN BEAVEN CALDERWOOD MD
NPI 1134119746
Internal Medicine in Boston, MA
NPI Status: Active since October 25, 2005
Contact Information
55 FRUIT STREET GRJ 5
INFECTIOUS DISEASE ASSOCIATES
BOSTON, MA
ZIP 02114
Phone: (617) 726-3811
Fax: (617) 726-7416
NPPES record last updated: September 11, 2025. Verified against the NPPES registry weekly; last sync: July 12, 2026.
- Individual
- Male
- Internal Medicine
About STEPHEN CALDERWOOD
This page provides the complete NPI Profile along with additional information for Stephen Calderwood, an internist established in Boston, Massachusetts with a medical specialization in Internal Medicine. The healthcare provider is registered in the NPI registry with number 1134119746 assigned on October 2005. The practitioner's primary taxonomy code is 207R00000X with license number 42807 (MA). The provider is registered as an individual and his NPI record was last updated one year ago.
- NPI
- 1134119746
- Provider Name
- DR. STEPHEN BEAVEN CALDERWOOD MD
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 55 FRUIT STREET GRJ 5 INFECTIOUS DISEASE ASSOCIATES BOSTON, MA 02114
- Location Phone
- (617) 726-3811
- Location Fax
- (617) 726-7416
- Mailing Address
- PO BOX 9142 MASS GENERAL PHYSICIAN ORGANIZATION CHARLESTOWN, MA 02129
- Mailing Phone
- (617) 724-0287
- Mailing Fax
- (617) 726-2894
- Is Sole Proprietor?
- No
- Enumeration Date
- 10-25-2005
- Last Update Date
- 09-11-2025
- Code Navigator
An internist like Stephen Calderwood 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.
- 42807
- 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.
Secondary Taxonomies
The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.
| No. | Taxonomy Code | Type | Classification / Specialization |
License No. (State) |
|---|---|---|---|---|
| 1 | 207RI0200X | Allopathic & Osteopathic Physicians | Internal Medicine | 42807 (MA) |
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.
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 |
|---|---|---|---|
| 0161993 | MEDICAID (05) | MA | |
| E05759 | OTHER (01) | MA | BCBS MA |
| 042807 | OTHER (01) | MA | TUFTS HEALTH PLAN |
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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 1134119746, we treat the final digit (6) 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 64. The final step is to find the difference between that total and the next multiple of ten (70 - 64 = 6).
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.
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.
Step 2: Add all digits plus the NPI constant
Add the transformed values, the unchanged digits, and the constant 24.
Step 3: Find the amount needed to reach the next multiple of 10
The next multiple of ten after 64 is 70. The difference is the calculated check digit.
Other Providers at the Same Location
The following 2 providers are registered at the same or a nearby location.
BOSTON, MA 02114
BOSTON, MA 02114
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1134119746, enumerated as an "individual" on October 25, 2005.
The provider is located at 55 FRUIT STREET GRJ 5 INFECTIOUS DISEASE ASSOCIATES BOSTON, MA 02114 and the phone number is (617) 726-3811.
Internal Medicine with taxonomy code 207R00000X.
The provider might be accepting Accepts: Medicare, Medicaid, Blue Cross Blue Shield and. Please consult your insurance carrier or call the provider to verify.
