ROBERT A. NUSSBAUM, MD, P.C.
NPI 1598041477
Internal Medicine - Gastroenterology in Alexandria, VA
NPI Status: Active since October 24, 2011
Contact Information
6355 WALKER LN
STE 309
ALEXANDRIA, VA
ZIP 22310
Phone: (703) 313-8400
Fax: (703) 313-9666
- Organization
- Internal Medicine
- Gastroenterology
- CLIA Number: 49D0968758
- CLIA Cert. Type: Physician Office
- CLIA Exp. Date: 12-20-2027
About ROBERT A. NUSSBAUM, MD, P.C.
This page provides the complete NPI Profile along with additional information for Robert A. Nussbaum, Md, P.c., an internist established in Alexandria, Virginia operating as a Internal Medicine, focusing in gastroenterology . The healthcare provider is registered in the NPI registry with number 1598041477 assigned on October 2011. The practitioner's primary taxonomy code is 207RG0100X with license number 0101047887 (VA). The provider is registered as an organization and their NPI record was last updated 12 years ago. The organization operates as a Single Specialty Group with one or more individual practitioners, all of who practice with the same area of specialization. The authorized official of this NPI record is Dr. Robert A Nussbaum M.d. (President)
- NPI
- 1598041477
- Provider Name
- ROBERT A. NUSSBAUM, MD, P.C.
- Entity Type
- Organization
- Location Address
- 6355 WALKER LN STE 309 ALEXANDRIA, VA 22310
- Location Phone
- (703) 313-8400
- Location Fax
- (703) 313-9666
- Mailing Address
- 6355 WALKER LN STE 309 ALEXANDRIA, VA 22310
- Mailing Phone
- (703) 313-8400
- Mailing Fax
- (703) 313-9666
- Is Sole Proprietor?
- No
- Is Organization Subpart?
- No
- Enumeration Date
- 10-24-2011
- Last Update Date
- 03-04-2014
- Code Navigator
An internist like Robert A. Nussbaum, Md, P.c. 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 Gastroenterology
- Taxonomy Code
- 207RG0100X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- 0101047887
- License State
- VA
- Taxonomy Description
- An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
Group Taxonomy 193400000X SINGLE SPECIALTY GROUP
This provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.
CLIA Information
The Clinical Laboratory Improvement Amendments (CLIA) of 1988 applies to facilities or sites that test human specimens for health assessment or to diagnose, prevent, or treat disease. The CLIA Program sets standards for clinical laboratory testing and issues certificates. The NPI / CLIA crosswalk information for this NPI number is:
- CLIA Number
- 49D0968758
- Facility Type
- Physician Office
- Certificate Effective Date
- December 21, 2025
- Certificate Expiration Date
- December 20, 2027
- Laboratory Director
- ROBERT A. NUSSBAUM MD
- Certificate Type
- Certificate of Waiver
- Certificate Type Description
- This CLIA certificate is issued to Robert A. Nussbaum, Md, P.c. to perform only waived tests. CLIA defines waived tests as simple tests with a low risk for an incorrect result. Waived tests include certain tests listed in CLIA regulations, tests cleared by the FDA for home use and tests approved by the FDA for waived status and that meet CLIA waiver criteria.
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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 1598041477, we treat the final digit (7) 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 63. The final step is to find the difference between that total and the next multiple of ten (70 - 63 = 7).
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 63 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.
ALEXANDRIA, VA 22310
ALEXANDRIA, VA 22310
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1598041477, enumerated as an "organization" on October 24, 2011.
The provider is located at 6355 WALKER LN STE 309 ALEXANDRIA, VA 22310 and the phone number is (703) 313-8400.
Internal Medicine with taxonomy code 207RG0100X and a focus in Gastroenterology.
