JOHN LOOME M.D.
NPI 1023084209
Internal Medicine - Geriatric Medicine in Towson, MD
- Individual
- Male
- Internal Medicine
- Geriatric Medicine
About JOHN LOOME
This page provides the complete NPI Profile along with additional information for John Loome, an internist established in Towson, Maryland with a medical specialization in Internal Medicine, focusing in geriatric medicine . The healthcare provider is registered in the NPI registry with number 1023084209 assigned on February 2006. The practitioner's primary taxonomy code is 207RG0300X with license number D52728 (MD). The provider is registered as an individual and his NPI record was last updated July 2026.
- NPI
- 1023084209
- Provider Name
- JOHN LOOME M.D.
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 515 FAIRMOUNT AVE 9TH FLOOR TOWSON, MD 21286
- Location Phone
- (410) 494-7671
- Mailing Address
- 3523 RUNNYMEDE PL NW WASHINGTON, DC 20015
- Is Sole Proprietor?
- No
- Enumeration Date
- 02-27-2006
- Last Update Date
- 07-13-2026
- Code Navigator
An internist like John Loome 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 Geriatric Medicine
- Taxonomy Code
- 207RG0300X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- D52728
- License State
- MD
- Taxonomy Description
- An internist who has special knowledge of the aging process and special skills in the diagnostic, therapeutic, preventive and rehabilitative aspects of illness in the elderly. This specialist cares for geriatric patients in the patient's home, the office, long-term care settings such as nursing homes and the hospital.
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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 1023084209, we treat the final digit (9) 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 51. The final step is to find the difference between that total and the next multiple of ten (60 - 51 = 9).
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 51 is 60. 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.
TOWSON, MD 21286
TOWSON, MD 21286
TOWSON, MD 21286
TOWSON, MD 21286
BALTIMORE, MD 21286
TOWSON, MD 21286
TOWSON, MD 21286
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1023084209, enumerated as an "individual" on February 27, 2006.
The provider is located at 515 FAIRMOUNT AVE 9TH FLOOR TOWSON, MD 21286 and the phone number is (410) 494-7671.
Internal Medicine with taxonomy code 207RG0300X and a focus in Geriatric Medicine.
