DOUGLAS G ARMSTRONG MD
NPI 1467486712
Orthopaedic Surgery - Adult Reconstructive Orthopaedic Surgery in Antioch, IL
NPI Status: Active since July 11, 2006
Contact Information
906 WOODLAND DR
ANTIOCH, IL
ZIP 60002
Phone: (717) 480-7441
- Individual
- Male
- Orthopaedic Surgery
- Adult Reconstructive Orthopaedic Surgery
About DOUGLAS ARMSTRONG
This page provides the complete NPI Profile along with additional information for Douglas Armstrong, a provider established in Antioch, Illinois with a medical specialization in Orthopaedic Surgery, focusing in adult reconstructive orthopaedic surgery . The healthcare provider is registered in the NPI registry with number 1467486712 assigned on July 2006. The practitioner's primary taxonomy code is 207XS0114X with license number MD433764 (PA). The provider is registered as an individual and his NPI record was last updated April 2026.
- NPI
- 1467486712
- Provider Name
- DOUGLAS G ARMSTRONG MD
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 906 WOODLAND DR ANTIOCH, IL 60002
- Location Phone
- (717) 480-7441
- Mailing Address
- 906 WOODLAND DR ANTIOCH, IL 60002
- Mailing Phone
- (717) 480-7441
- Is Sole Proprietor?
- Yes
- Enumeration Date
- 07-11-2006
- Last Update Date
- 04-27-2026
- Code Navigator
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
Orthopaedic Surgery Adult Reconstructive Orthopaedic Surgery
- Taxonomy Code
- 207XS0114X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- MD433764
- License State
- PA
- Taxonomy Description
- Recognized by several state medical boards as a fellowship subspecialty program of orthopaedic surgery, adult reconstructive orthopaedic surgeons deal with reconstructive procedures such as joint arthroplasty (i.e., hip and knee), osteotomy, arthroscopy, soft-tissue reconstruction, and a variety of other adult reconstructive surgical procedures.
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 | 207X00000X | Allopathic & Osteopathic Physicians | Orthopaedic Surgery | 35-083386 (OH) |
| 2 | 207XP3100X | Allopathic & Osteopathic Physicians | Orthopaedic Surgery | MD433764 (PA) |
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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 1467486712, we treat the final digit (2) 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 68. The final step is to find the difference between that total and the next multiple of ten (70 - 68 = 2).
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 68 is 70. The difference is the calculated check digit.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1467486712, enumerated as an "individual" on July 11, 2006.
The provider is located at 906 WOODLAND DR ANTIOCH, IL 60002 and the phone number is (717) 480-7441.
Orthopaedic Surgery with taxonomy code 207XS0114X and a focus in Adult Reconstructive Orthopaedic Surgery.
