DR. JONATHAN ISAAC WITONSKY M.D.
NPI 1679005813
Pediatrics - Pediatric Allergy/Immunology in San Francisco, CA

NPI Status: Active since March 28, 2017

Contact Information

1825 4TH ST FL 6
SAN FRANCISCO, CA
ZIP 94143
Phone: (415) 353-7337

NPI Profile Information
Primary Taxonomy
Secondary Taxonomies
Secondary Locations
Medicare Participation & PECOS Status
NPI Validation
Other Providers Same Location
Frequently Asked Questions

Individual
Male
Pediatrics
Pediatric Allergy/Immunology
PECOS Enrolled

About JONATHAN WITONSKY

This page provides the complete NPI Profile along with additional information for Jonathan Witonsky, a pediatrician established in San Francisco, California with a medical specialization in Pediatrics, focusing in pediatric allergy/immunology . The healthcare provider is registered in the NPI registry with number 1679005813 assigned on March 2017. The practitioner's primary taxonomy code is 2080P0201X with license number A160639 (CA). The provider is registered as an individual and his NPI record was last updated 3 years ago.

NPI: 1679005813
Provider Name: DR. JONATHAN ISAAC WITONSKY M.D.
Gender: Male
Entity Type: Individual
Location Address: 1825 4TH ST FL 6 SAN FRANCISCO, CA 94143
Location Phone: (415) 353-7337
Mailing Address: 550 16TH ST FL 4 SAN FRANCISCO, CA 94143
Mailing Phone: (415) 353-7337
Is Sole Proprietor?: No
Enumeration Date: 03-28-2017
Last Update Date: 04-19-2023
Code Navigator

A pediatrician like Jonathan Witonsky is a physician who has completed a pediatric residency and is board-certified or board-eligible in a pediatric specialty. Pediatric care providers are trained to care for newborns, infants, children and adolescents. A pediatrician could perform physical exams, manage vaccinations, monitor development milestones, diagnose illnesses, infections, injuries or other health problems, etc.

Location Map

Secondary Locations

1200 El Camino Real
South San Francisco, CA 94080
(650) 742-2000

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: Pediatrics Pediatric Allergy/Immunology
Taxonomy Code: 2080P0201X
Type: Allopathic & Osteopathic Physicians
License No.: A160639
License State: CA
Taxonomy Description: A pediatrician who specializes in the diagnosis and treatment of allergies, allergic reactions, and immunologic diseases in children.

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	207K00000X	Allopathic & Osteopathic Physicians	Allergy & Immunology	A160639 (CA)
2	208000000X	Allopathic & Osteopathic Physicians	Pediatrics	A160639 (CA)

Medicare Participation & PECOS Enrollment Status

Jonathan Witonsky 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

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 1679005813, we treat the final digit (3) 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 57. The final step is to find the difference between that total and the next multiple of ten (60 - 57 = 3).

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.

Pos 1

Doubled → 2

Pos 2

Unchanged

Pos 3

Doubled → 14 → 1 + 4

Pos 4

Unchanged

Pos 5

Doubled → 0

Pos 6

Unchanged

Pos 7

Doubled → 10 → 1 + 0

Pos 8

Unchanged

Pos 9

Doubled → 2

Check

Target digit

Regular digit Doubled digit Check digit

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.

1 → 2 7 → 14 → 5 0 → 0 5 → 10 → 1 1 → 2