ALEXANDER SCOTT WILLIAMS DO
NPI 1154075877
Internal Medicine in Fpo, AA
NPI Status: Active since February 10, 2022
Contact Information
NAVAL HOSPITAL GUANTANAMO BAY
PSC 1005 BOX 110185
FPO, AA
ZIP 34009
Phone: (619) 597-5184
- Individual
- Male
- Internal Medicine
- PECOS Enrolled
About ALEXANDER WILLIAMS
This page provides the complete NPI Profile along with additional information for Alexander Williams, an internist established in Fpo, with a medical specialization in Internal Medicine. The healthcare provider is registered in the NPI registry with number 1154075877 assigned on February 2022. The practitioner's primary taxonomy code is 207R00000X with license number 0102208115 (VA). The provider is registered as an individual and his NPI record was last updated one year ago.
- NPI
- 1154075877
- Provider Name
- ALEXANDER SCOTT WILLIAMS DO
- Gender
- Male
- Entity Type
- Individual
- Location Address
- NAVAL HOSPITAL GUANTANAMO BAY PSC 1005 BOX 110185 FPO, AA 34009
- Location Phone
- (619) 597-5184
- Mailing Address
- NAVAL HOSPITAL GUANTANAMO BAY PSC 1005 BOX 110185 FPO, AA 34009
- Is Sole Proprietor?
- No
- Enumeration Date
- 02-10-2022
- Last Update Date
- 04-08-2025
- Code Navigator
An internist like Alexander Williams 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
- License No.
- 0102208115
- License State
- VA
- 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.
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 | 390200000X | Student, Health Care | Student in an Organized Health Care Education/Training Program |
Medicare Participation & PECOS Enrollment Status
Alexander Williams is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.
What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.
Is the provider registered in PECOS? Yes
Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes
Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes
Eligible to Order or Refer a Home Health Agency (HHA): Yes
Eligible to Order or Refer Power Mobility Devices: Yes
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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 1154075877, 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 53. The final step is to find the difference between that total and the next multiple of ten (60 - 53 = 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 53 is 60. The difference is the calculated check digit.
Other Providers at the Same Location
The following 9 providers are registered at the same or a nearby location.
FPO, AA 34009
FPO, AA 34009
FPO, AA 34009
FPO, AA 34009
FPO, AA 34009
FPO, AA 34009
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1154075877, enumerated as an "individual" on February 10, 2022.
The provider is located at NAVAL HOSPITAL GUANTANAMO BAY PSC 1005 BOX 110185 FPO, AA 34009 and the phone number is (619) 597-5184.
Internal Medicine with taxonomy code 207R00000X.
