DR. JOHN EDWIN ATWOOD M.D.
NPI 1023117090
Internal Medicine - Cardiovascular Disease in Bethesda, MD
NPI Status: Active since September 22, 2006
Contact Information
8901 ROCKVILLE PIKE
BETHESDA, MD
ZIP 20889
Phone: (301) 295-4000
NPPES record last updated: April 2, 2024. Verified against the NPPES registry weekly; last sync: July 12, 2026.
Record update history: Apr 2, 2024, Jun 14, 2019 (2 updates tracked since 2019).
- Individual
- Male
- Internal Medicine
- Cardiovascular Disease
About JOHN ATWOOD
This page provides the complete NPI Profile along with additional information for John Atwood, an internist established in Bethesda, Maryland with a medical specialization in Internal Medicine, focusing in cardiovascular disease . The healthcare provider is registered in the NPI registry with number 1023117090 assigned on September 2006. The practitioner's primary taxonomy code is 207RC0000X with license number D0094988 (MD). The provider is registered as an individual and his NPI record was last updated 2 years ago.
- NPI
- 1023117090
- Provider Name
- DR. JOHN EDWIN ATWOOD M.D.
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 8901 ROCKVILLE PIKE BETHESDA, MD 20889
- Location Phone
- (301) 295-4000
- Mailing Address
- 8901 WISCONSIN AVE BETHESDA, MD 20889
- Mailing Phone
- (012) 954-5003
- Is Sole Proprietor?
- Yes
- Enumeration Date
- 09-22-2006
- Last Update Date
- 04-02-2024
- Code Navigator
An internist like John Atwood 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 Cardiovascular Disease
- Taxonomy Code
- 207RC0000X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- D0094988
- License State
- MD
- Taxonomy Description
- An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.
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 | 207RC0000X | Allopathic & Osteopathic Physicians | Internal Medicine | 28900098 (CA) |
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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 1023117090, we treat the final digit (0) 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 50. The final step is to find the difference between that total and the next multiple of ten (50 - 50 = 0).
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 50 is 50. 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.
BETHESDA, MD 20889
BETHESDA, MD 20889
BETHESDA, MD 20889
BETHESDA, MD 20889
BETHESDA, MD 20889
BETHESDA, MD 20889
BETHESDA, MD 20889
BETHESDA, MD 20889
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1023117090, enumerated as an "individual" on September 22, 2006.
The provider is located at 8901 ROCKVILLE PIKE BETHESDA, MD 20889 and the phone number is (301) 295-4000.
Internal Medicine with taxonomy code 207RC0000X and a focus in Cardiovascular Disease.
