JUAN F. CASTILLO M.D.
NPI 1215138854
Internal Medicine in Union City, NJ
NPI Status: Active since May 30, 2007
Contact Information
322 49TH ST
UNION CITY, NJ
ZIP 07087
Phone: (201) 271-1770
Fax: (201) 271-1773
- Organization
- Internal Medicine
About JUAN F. CASTILLO M.D.
This page provides the complete NPI Profile along with additional information for Juan F. Castillo M.d., an internist established in Union City, New Jersey operating as a Internal Medicine. The healthcare provider is registered in the NPI registry with number 1215138854 assigned on May 2007. The practitioner's primary taxonomy code is 207R00000X with license number 25MA02287200 (NJ). The provider is registered as an organization and their NPI record was last updated one year ago. The organization operates as a Single Specialty Group with one or more individual practitioners, all of who practice with the same area of specialization. The authorized official of this NPI record is Juan F. Castillo M.d. (Owner)
- NPI
- 1215138854
- Provider Name
- JUAN F. CASTILLO M.D.
- Entity Type
- Organization
- Location Address
- 322 49TH ST UNION CITY, NJ 07087
- Location Phone
- (201) 271-1770
- Location Fax
- (201) 271-1773
- Mailing Address
- 322 49TH ST UNION CITY, NJ 07087
- Mailing Phone
- (201) 271-1770
- Mailing Fax
- (201) 271-1773
- Is Sole Proprietor?
- No
- Is Organization Subpart?
- No
- Enumeration Date
- 05-30-2007
- Last Update Date
- 09-11-2025
- Code Navigator
An internist like Juan F. Castillo M.d. 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.
- 25MA02287200
- License State
- NJ
- 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 | 207Q00000X | Allopathic & Osteopathic Physicians | Family Medicine | 25MA02287200 (NJ) |
Group Taxonomy 193400000X MULTIPLE SINGLE SPECIALTY GROUP
This provdier is a business group of one or more individual practitioners, all of who practice with the same area 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 1215138854, we treat the final digit (4) 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 56. The final step is to find the difference between that total and the next multiple of ten (60 - 56 = 4).
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 56 is 60. The difference is the calculated check digit.
Other Providers at the Same Location
The following 2 providers are registered at the same or a nearby location.
UNION CITY, NJ 07087
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1215138854, enumerated as an "organization" on May 30, 2007.
The provider is located at 322 49TH ST UNION CITY, NJ 07087 and the phone number is (201) 271-1770.
Internal Medicine with taxonomy code 207R00000X.
