FRANK S CALANDRINO JR MD LLC
NPI 1053257006
Internal Medicine - Pulmonary Disease in Saint Charles, MO
NPI Status: Active since April 23, 2026
Contact Information
300 1ST CAPITOL DR
SAINT CHARLES, MO
ZIP 63301
Phone: (314) 330-8616
Fax: (636) 333-4510
Some details in this NPI profile have been updated in the NPI registry within the last 30 days.
- Organization
- Internal Medicine
- Pulmonary Disease
About FRANK S CALANDRINO JR MD LLC
This page provides the complete NPI Profile along with additional information for Frank S Calandrino Jr Md Llc, an internist established in Saint Charles, Missouri operating as a Internal Medicine, focusing in pulmonary disease . The healthcare provider is registered in the NPI registry with number 1053257006 assigned on April 2026. The practitioner's primary taxonomy code is 207RP1001X. The provider is registered as an organization and their NPI record was last updated May 2026. Frank S Calandrino Jr Md Llc operates as a Multi-Specialty Group with one or more individual practitioners, who practice different areas of specialization. The authorized official of this NPI record is Frank S. Calandrino Jr. Md (Owner, Physician)
- NPI
- 1053257006
- Provider Name
- FRANK S CALANDRINO JR MD LLC
- Entity Type
- Organization
- Location Address
- 300 1ST CAPITOL DR SAINT CHARLES, MO 63301
- Location Phone
- (314) 330-8616
- Location Fax
- (636) 333-4510
- Mailing Address
- PO BOX 31038 DES PERES, MO 63131
- Mailing Phone
- (314) 330-8616
- Mailing Fax
- (636) 333-4510
- Is Sole Proprietor?
- No
- Is Organization Subpart?
- No
- Enumeration Date
- 04-23-2026
- Last Update Date
- 05-29-2026
- Code Navigator
An internist like Frank S Calandrino Jr Md 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 Pulmonary Disease
- Taxonomy Code
- 207RP1001X
- Type
- Allopathic & Osteopathic Physicians
- Taxonomy Description
- An internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational and environmental diseases, bronchitis, sleep disorders, emphysema and other complex disorders of the lungs.
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 | 207RC0200X | Allopathic & Osteopathic Physicians | Internal Medicine | |
| 2 | 207RS0012X | Allopathic & Osteopathic Physicians | Internal Medicine |
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.
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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 1053257006, we treat the final digit (6) 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 44. The final step is to find the difference between that total and the next multiple of ten (50 - 44 = 6).
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 44 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.
SAINT CHARLES, MO 63301
SAINT CHARLES, MO 63301
SAINT CHARLES, MO 63301
SAINT CHARLES, MO 63301
SAINT CHARLES, MO 63301
SAINT CHARLES, MO 63301
SAINT CHARLES, MO 63301
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1053257006, enumerated as an "organization" on April 23, 2026.
The provider is located at 300 1ST CAPITOL DR SAINT CHARLES, MO 63301 and the phone number is (314) 330-8616.
Internal Medicine with taxonomy code 207RP1001X and a focus in Pulmonary Disease.
