DR. MARK ROBERT STEWARD PH.D.
NPI 1821152828
Psychologist - Adult Development & Aging in Newton Centre, MA
NPI Status: Active since December 21, 2006
Contact Information
53 LANGLEY RD
SUITE 340D
NEWTON CENTRE, MA
ZIP 02459
Phone: (617) 484-7604
- Individual
- Male
- Psychologist
- Adult Development & Aging
About MARK STEWARD
This page provides the complete NPI Profile along with additional information for Mark Steward, a provider established in Newton Centre, Massachusetts with a medical specialization in Psychologist, focusing in adult development & aging . The healthcare provider is registered in the NPI registry with number 1821152828 assigned on December 2006. The practitioner's primary taxonomy code is 103TA0700X with license number 4784 (MA). The provider is registered as an individual and his NPI record was last updated one year ago.
- NPI
- 1821152828
- Provider Name
- DR. MARK ROBERT STEWARD PH.D.
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 53 LANGLEY RD SUITE 340D NEWTON CENTRE, MA 02459
- Location Phone
- (617) 484-7604
- Mailing Address
- 17 EDGEMOOR RD BELMONT, MA 02478
- Mailing Phone
- (617) 484-7604
- Is Sole Proprietor?
- Yes
- Enumeration Date
- 12-21-2006
- Last Update Date
- 09-11-2025
- Code Navigator
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
Psychologist Adult Development & Aging
- Taxonomy Code
- 103TA0700X
- Type
- Behavioral Health & Social Service Providers
- License No.
- 4784
- License State
- MA
- Taxonomy Description
- A psychologist who specializes in geropsychology, which applies the knowledge and methods of psychology to understanding and helping older persons and their families to maintain well-being, overcome problems and achieve maximum potential during later life. Professional geropsychology appreciates the wide diversity among older adults, the complex ethical issues that can arise in geriatric practice and the importance of interdisciplinary models of care.
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 | 103T00000X | Behavioral Health & Social Service Providers | Psychologist | 4784 (MA) |
| 2 | 103TC0700X | Behavioral Health & Social Service Providers | Psychologist | 4784 (MA) |
| 3 | 103TC2200X | Behavioral Health & Social Service Providers | Psychologist | 4784 (MA) |
| 4 | 103TF0000X | Behavioral Health & Social Service Providers | Psychologist | 4784 (MA) |
| 5 | 103TP2701X | Behavioral Health & Social Service Providers | Psychologist | 4784 (MA) |
| 6 | 103TS0200X | Behavioral Health & Social Service Providers | Psychologist | 4784 (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.
*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 |
|---|---|---|---|
| W04555 | OTHER (01) | MA | BLUE CROSS BLUE SHIELD |
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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 1821152828, we treat the final digit (8) 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 62. The final step is to find the difference between that total and the next multiple of ten (70 - 62 = 8).
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 62 is 70. The difference is the calculated check digit.
Other Providers at the Same Location
The following 20 providers are registered at the same or a nearby location.
NEWTON CENTER, MA 02459
NEWTON CENTER, MA 02459
NEWTON CENTER, MA 02459
NEWTON CENTRE, MA 02459
NEWTON CENTRE, MA 02459
NEWTON CENTRE, MA 02459
NEWTON CENTRE, MA 02459
NEWTON CENTRE, MA 02459
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1821152828, enumerated as an "individual" on December 21, 2006.
The provider is located at 53 LANGLEY RD SUITE 340D NEWTON CENTRE, MA 02459 and the phone number is (617) 484-7604.
Psychologist with taxonomy code 103TA0700X and a focus in Adult Development & Aging.
The provider might be accepting Accepts: Blue Cross Blue Shield, Medicare and Medicaid. Please consult your insurance carrier or call the provider to verify.
