MARK W UNGER C.S.
NPI 1831357912
Specialist in Ashland, MA
NPI Status: Active since May 27, 2008
Contact Information
117 ALGONQUIN TRL
ASHLAND, MA
ZIP 01721
Phone: (508) 881-3000
Fax: (610) 980-3000
NPPES record last updated: May 27, 2008. Verified against the NPPES registry weekly; last sync: July 12, 2026.
- Individual
- Male
- Specialist
About MARK UNGER
This page provides the complete NPI Profile along with additional information for Mark Unger, a provider established in Ashland, Massachusetts with a medical specialization in Specialist. The healthcare provider is registered in the NPI registry with number 1831357912 assigned on May 2008. The practitioner's primary taxonomy code is 174400000X. The provider is registered as an individual and his NPI record was last updated 18 years ago.
- NPI
- 1831357912
- Provider Name
- MARK W UNGER C.S.
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 117 ALGONQUIN TRL ASHLAND, MA 01721
- Location Phone
- (508) 881-3000
- Location Fax
- (610) 980-3000
- Mailing Address
- 117 ALGONQUIN TRL ASHLAND, MA 01721
- Mailing Phone
- (508) 881-3000
- Mailing Fax
- (610) 980-3000
- Is Sole Proprietor?
- Yes
- Enumeration Date
- 05-27-2008
- Last Update Date
- 05-27-2008
- 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
Specialist
- Taxonomy Code
- 174400000X
- Type
- Other Service Providers
- Taxonomy Description
- An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.
Reviews for MARK W UNGER C.S.
There are currently no reviews for this provider. Be the first person to share your experience with this provider by filling out our review form. Your insights are appreciated and will help others make informed decisions.
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 1831357912, we treat the final digit (2) 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 68. The final step is to find the difference between that total and the next multiple of ten (70 - 68 = 2).
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 68 is 70. The difference is the calculated check digit.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1831357912, enumerated as an "individual" on May 27, 2008.
The provider is located at 117 ALGONQUIN TRL ASHLAND, MA 01721 and the phone number is (508) 881-3000.
Specialist with taxonomy code 174400000X.
