ADAM Z. TILLOWITZ MD – NPI #1245869510
Internal Medicine
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.
ADAM TILLOWITZ is a physician located in WASHINGTON, DC. NPPES has assigned the NPI number 1245869510 to ADAM TILLOWITZ on April 07, 2020. It is a Type-1 NPI, indicating this NPI number is associated with an individual. He is also known by his former name ADAM ZACHARY HOROWITZ. The primary taxonomy selected by this provider is 207RG0100X from the Health Care Provider Taxonomy code set, which is classified as Internal Medicine, specializing in Gastroenterology
The NPI profile was last updated on May 18, 2026. Use the NPI data found here to bill health insurance companies, identify providers enrolled in Medicare and Medicaid services or other HIPAA compliant transactions. See the complete NPI profile for ADAM TILLOWITZ below.
NPI Profile for
ADAM Z. TILLOWITZ
(more than 6 years ago)
2150 PENNSYLVANIA AVE
WASHINGTON, DC 20037 Phone: (202) 741-3000 Fax:
1 Other location(s):
Providence, RI 02904-2609
Phone: (401) 274-4800
DALLAS, TX 75320-2230 Phone: (401) 421-8800 Fax:
Note: NPPES allows providers to attest to the accuracy of their NPI data. When a provider request any change to the NPI record, they will be able to attest to their changed NPI data, resulting in an updated certification date.
A taxonomy code is a code that describes the health care service provider's type, classification, and the area of specialization. The primary specialty for this provider is indicated as (Primary) below.
| Taxonomy Classification / Specialization | State | License |
|---|---|---|
| 207RG0100X - Internal Medicine / Gastroenterology (Primary) |
RI | MD21210 |
The taxonomy codes are selected by the provider at the time of NPI registration. Selection of a taxonomy code does not replace any credentialing or validation process that the provider requesting the code should complete.