ERIKA CHERK
NPI 1871129882
Allergy & Immunology in Palo Alto, CA

NPI Status: Active since March 21, 2020

Contact Information

795 EL CAMINO REAL
PALO ALTO, CA
ZIP 94301
Phone: (650) 853-2981

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  • Individual
  • Female
  • Allergy & Immunology
  • PECOS Enrolled

About ERIKA CHERK

This page provides the complete NPI Profile along with additional information for Erika Cherk, a provider established in Palo Alto, California with a medical specialization in Allergy & Immunology. The healthcare provider is registered in the NPI registry with number 1871129882 assigned on March 2020. The practitioner's primary taxonomy code is 207K00000X with license number A183369 (CA). The provider is registered as an individual and her NPI record was last updated one year ago.

NPI
1871129882
Provider Name
ERIKA CHERK
Gender
Female
Entity Type
Individual
Location Address
795 EL CAMINO REAL PALO ALTO, CA 94301
Location Phone
(650) 853-2981
Mailing Address
795 EL CAMINO REAL PALO ALTO, CA 94301
Mailing Phone
(650) 853-2981
Mailing Fax
Is Sole Proprietor?
No
Enumeration Date
03-21-2020
Last Update Date
12-05-2025
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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

Allergy & Immunology

Taxonomy Code
207K00000X
Type
Allopathic & Osteopathic Physicians
License No.
A183369
License State
CA
Taxonomy Description
An allergist-immunologist is trained in evaluation, physical and laboratory diagnosis, and management of disorders involving the immune system. Selected examples of such conditions include asthma, anaphylaxis, rhinitis, eczema, and adverse reactions to drugs, foods, and insect stings as well as immune deficiency diseases (both acquired and congenital), defects in host defense, and problems related to autoimmune disease, organ transplantation, or malignancies of the immune system.

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)
1208000000XAllopathic & Osteopathic Physicians

Pediatrics

A183369 (CA)

Medicare Participation & PECOS Enrollment Status

Erika Cherk 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

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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 1871129882, 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.

Pos 1
1
Doubled → 2
Pos 2
8
Unchanged
Pos 3
7
Doubled → 14 → 1 + 4
Pos 4
1
Unchanged
Pos 5
1
Doubled → 2
Pos 6
2
Unchanged
Pos 7
9
Doubled → 18 → 1 + 8
Pos 8
8
Unchanged
Pos 9
8
Doubled → 16 → 1 + 6
Check
2
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 1 → 2 9 → 18 → 9 8 → 16 → 7

Step 2: Add all digits plus the NPI constant

Add the transformed values, the unchanged digits, and the constant 24.

2 + 8 + 1 + 4 + 1 + 2 + 2 + 1 + 8 + 8 + 1 + 6 + 24 = 68

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.

70 - 68 = 2
This NPI is valid
The calculated check digit is 2, which matches the last digit of 1871129882.

Other Providers at the Same Location


The following 20 providers are registered at the same or a nearby location.

Occupational Therapist (Hand)
795 EL CAMINO REAL
PALO ALTO, CA 94301
Pharmacist
795 EL CAMINO REAL
PALO ALTO, CA 94301
Physician Assistant
795 EL CAMINO REAL, URGENT CARE
PALO ALTO, CA 94301
Pharmacist
795 EL CAMINO REAL
PALO ALTO, CA 94301
Pharmacist (Pharmacotherapy)
795 EL CAMINO REAL, LEE BUILDING LEVEL A
PALO ALTO, CA 94301
Pharmacist (Pharmacotherapy)
795 EL CAMINO REAL, PHARMACY
PALO ALTO, CA 94301
Pharmacist
795 EL CAMINO REAL
PALO ALTO, CA 94301
Pediatrics
795 EL CAMINO REAL
PALO ALTO, CA 94301
Physical Therapist
795 EL CAMINO REAL
PALO ALTO, CA 94301
Internal Medicine (Infectious Disease)
795 EL CAMINO REAL
PALO ALTO, CA 94301
Pediatrics
795 EL CAMINO REAL
PALO ALTO, CA 94301
Dermatology
795 EL CAMINO REAL
PALO ALTO, CA 94301
Anesthesiology
795 EL CAMINO REAL
PALO ALTO, CA 94301
Anesthesiology
795 EL CAMINO REAL
PALO ALTO, CA 94301
Anesthesiology
795 EL CAMINO REAL
PALO ALTO, CA 94301
Psychiatry & Neurology (Psychiatry)
795 EL CAMINO REAL
PALO ALTO, CA 94301
Internal Medicine (Cardiovascular Disease)
795 EL CAMINO REAL
PALO ALTO, CA 94301
Internal Medicine
795 EL CAMINO REAL
PALO ALTO, CA 94301
Dermatology
795 EL CAMINO REAL
PALO ALTO, CA 94301
Dermatology
795 EL CAMINO REAL
PALO ALTO, CA 94301

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1871129882, enumerated as an "individual" on March 21, 2020.

The provider is located at 795 EL CAMINO REAL PALO ALTO, CA 94301 and the phone number is (650) 853-2981.

Allergy & Immunology with taxonomy code 207K00000X.