DOCTORS FIRST, LLC
NPI 1912160458
Internal Medicine in Germantown, MD

NPI Status: Active since July 04, 2008

Contact Information

12800 MIDDLEBROOK RD STE 400
GERMANTOWN, MD
ZIP 20874
Phone: (240) 215-3301

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  • Organization
  • Internal Medicine

About DOCTORS FIRST, LLC

This page provides the complete NPI Profile along with additional information for Doctors First, Llc, an internist established in Germantown, Maryland operating as a Internal Medicine. The healthcare provider is registered in the NPI registry with number 1912160458 assigned on July 2008. The practitioner's primary taxonomy code is 207R00000X. The provider is registered as an organization and their NPI record was last updated April 2026. Doctors First, Llc operates as a Multi-Specialty Group with one or more individual practitioners, who practice different areas of specialization. The provider's . The authorized official of this NPI record is Jakelyne Callejas (Office Manager)

NPI
1912160458
Provider Legal Name
DOCTORS FIRST, LLC
Other Organization Name
Other Name Type
(6)
Entity Type
Organization
Location Address
12800 MIDDLEBROOK RD STE 400 GERMANTOWN, MD 20874
Location Phone
(240) 215-3301
Mailing Address
20501 SENECA MEADOWS PKWY STE 200 GERMANTOWN, MD 20876
Mailing Phone
(240) 701-3013
Is Sole Proprietor?
No
Is Organization Subpart?
No
Enumeration Date
07-04-2008
Last Update Date
04-14-2026
Code Navigator

An internist like Doctors First, Llc 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

Taxonomy Code
207R00000X
Type
Allopathic & Osteopathic Physicians
Taxonomy Description
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

Group Taxonomy 193200000X MULTI-SPECIALTY GROUP

This provider is a business group of one or more individual practitioners, who practice with different areas of specialization.

Authorized Official

The authorized official is the designated individual with the legal authority to make changes to the provider’s official NPI record. For organizations, the authorized official must be a general partner, chairman of the board, CEO, CFO or a direct owner holding at least a 5 percent stake in the medical organization.

Authorized Official Name

JAKELYNE CALLEJAS

Authorized Official Title
OFFICE MANAGER
Authorized Official Phone
(301) 515-2901

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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 1912160458, we treat the final digit (8) 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 52. The final step is to find the difference between that total and the next multiple of ten (60 - 52 = 8).

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.

Pos 1
1
Doubled → 2
Pos 2
9
Unchanged
Pos 3
1
Doubled → 2
Pos 4
2
Unchanged
Pos 5
1
Doubled → 2
Pos 6
6
Unchanged
Pos 7
0
Doubled → 0
Pos 8
4
Unchanged
Pos 9
5
Doubled → 10 → 1 + 0
Check
8
Target digit
Regular digit Doubled digit Check digit

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.

1 → 2 1 → 2 1 → 2 0 → 0 5 → 10 → 1

Step 2: Add all digits plus the NPI constant

Add the transformed values, the unchanged digits, and the constant 24.

2 + 9 + 2 + 2 + 2 + 6 + 0 + 4 + 1 + 0 + 24 = 52

Step 3: Find the amount needed to reach the next multiple of 10

The next multiple of ten after 52 is 60. The difference is the calculated check digit.

60 - 52 = 8
This NPI is valid
The calculated check digit is 8, which matches the last digit of 1912160458.

Other Providers at the Same Location


The following 8 providers are registered at the same or a nearby location.

Internal Medicine
12800 MIDDLEBROOK RD STE 400
GERMANTOWN, MD 20874
Nurse Practitioner (Psychiatric/Mental Health)
12800 MIDDLEBROOK RD STE 400
GERMANTOWN, MD 20874
Physician Assistant
12800 MIDDLEBROOK RD STE 400
GERMANTOWN, MD 20874
Technician, Pathology (Phlebotomy)
12800 MIDDLEBROOK RD STE 400
GERMANTOWN, MD 20874
Nurse Practitioner (Gerontology)
12800 MIDDLEBROOK RD STE 400
GERMANTOWN, MD 20874
Nurse Practitioner (Psychiatric/Mental Health)
12800 MIDDLEBROOK RD STE 400
GERMANTOWN, MD 20874
Physician Assistant
12800 MIDDLEBROOK RD STE 400
GERMANTOWN, MD 20874
Physician Assistant
12800 MIDDLEBROOK RD STE 400
GERMANTOWN, MD 20874

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1912160458, enumerated as an "organization" on July 04, 2008.

The provider is located at 12800 MIDDLEBROOK RD STE 400 GERMANTOWN, MD 20874 and the phone number is (240) 215-3301.

Internal Medicine with taxonomy code 207R00000X.