ALASKA FIERRO MD
NPI 1659068625
Hospitalist in New York, NY
NPI Status: Active since April 20, 2023
Contact Information
520 EAST 70TH ST, STARR PAVILION, ST-05-507
NEW YORK, NY
ZIP 10021
Phone: (212) 746-4071
Fax: (212) 746-4734
Some details in this NPI profile have been updated in the NPI registry within the last 30 days.
NPPES record last updated: June 25, 2026. Verified against the NPPES registry weekly; last sync: July 12, 2026.
- Individual
- Male
- Hospitalist
About ALASKA FIERRO
This page provides the complete NPI Profile along with additional information for Alaska Fierro, a provider established in New York, New York with a medical specialization in Hospitalist. The healthcare provider is registered in the NPI registry with number 1659068625 assigned on April 2023. The practitioner's primary taxonomy code is 208M00000X with license number 339743-01 (NY). The provider is registered as an individual and his NPI record was last updated June 2026.
- NPI
- 1659068625
- Provider Name
- ALASKA FIERRO MD
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 520 EAST 70TH ST, STARR PAVILION, ST-05-507 NEW YORK, NY 10021
- Location Phone
- (212) 746-4071
- Location Fax
- (212) 746-4734
- Mailing Address
- 520 EAST 70TH ST, STARR PAVILION, ST-05-507 NEW YORK, NY 10021
- Mailing Phone
- (212) 746-4071
- Mailing Fax
- (212) 746-4734
- Is Sole Proprietor?
- No
- Enumeration Date
- 04-20-2023
- Last Update Date
- 06-25-2026
- 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
Hospitalist
- Taxonomy Code
- 208M00000X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- 339743-01
- License State
- NY
- Taxonomy Description
- Hospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient care, teaching, research, and leadership related to Hospital Medicine. The term 'hospitalist' refers to physicians whose practice emphasizes providing care for hospitalized patients.
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 | 207R00000X | Allopathic & Osteopathic Physicians | Internal Medicine | 339743-01 (NY) |
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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 1659068625, we treat the final digit (5) 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 65. The final step is to find the difference between that total and the next multiple of ten (70 - 65 = 5).
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 65 is 70. The difference is the calculated check digit.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1659068625, enumerated as an "individual" on April 20, 2023.
The provider is located at 520 EAST 70TH ST, STARR PAVILION, ST-05-507 NEW YORK, NY 10021 and the phone number is (212) 746-4071.
Hospitalist with taxonomy code 208M00000X.
