MARSHALL MEDICAL CENTER
NPI 1659554285
Internal Medicine - Hematology & Oncology in Cameron Park, CA

NPI Status: Active since December 05, 2007

Contact Information

3581 PALMER DR
SUITE 400
CAMERON PARK, CA
ZIP 95682
Phone: (530) 676-6600
Fax: (530) 676-6603

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  • Organization
  • Internal Medicine
  • Hematology & Oncology

About MARSHALL MEDICAL CENTER

This page provides the complete NPI Profile along with additional information for Marshall Medical Center, an internist established in Cameron Park, California operating as a Internal Medicine, focusing in hematology & oncology . The healthcare provider is registered in the NPI registry with number 1659554285 assigned on December 2007. The practitioner's primary taxonomy code is 207RH0003X. The provider is registered as an organization and their NPI record was last updated March 2026. 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 provider's . The authorized official of this NPI record is Siri Nelson (Ceo)

NPI
1659554285
Provider Legal Name
MARSHALL MEDICAL CENTER
Other Organization Name
Other Name Type
(6)
Entity Type
Organization
Location Address
3581 PALMER DR SUITE 400 CAMERON PARK, CA 95682
Location Phone
(530) 676-6600
Location Fax
(530) 676-6603
Mailing Address
PO BOX 45680 SAN FRANCISCO, CA 94145
Mailing Phone
(530) 626-2787
Mailing Fax
(530) 676-6603
Is Sole Proprietor?
No
Is Organization Subpart?
No
Enumeration Date
12-05-2007
Last Update Date
03-09-2026
Code Navigator

An internist like Marshall Medical Center 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 Hematology & Oncology

Taxonomy Code
207RH0003X
Type
Allopathic & Osteopathic Physicians
Taxonomy Description
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.

Group Taxonomy 193400000X 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.

Authorized Official

The authorized official is the designated individual with the legal authority to make changes to the provider’s official NPI record. For organizations, the authorized official must be a general partner, chairman of the board, CEO, CFO or a direct owner holding at least a 5 percent stake in the medical organization.

Authorized Official Name

SIRI NELSON

Authorized Official Title
CEO
Authorized Official Phone
(530) 622-1441

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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 1659554285, 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.

Pos 1
1
Doubled → 2
Pos 2
6
Unchanged
Pos 3
5
Doubled → 10 → 1 + 0
Pos 4
9
Unchanged
Pos 5
5
Doubled → 10 → 1 + 0
Pos 6
5
Unchanged
Pos 7
4
Doubled → 8
Pos 8
2
Unchanged
Pos 9
8
Doubled → 16 → 1 + 6
Check
5
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 5 → 10 → 1 5 → 10 → 1 4 → 8 8 → 16 → 7

Step 2: Add all digits plus the NPI constant

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

2 + 6 + 1 + 0 + 9 + 1 + 0 + 5 + 8 + 2 + 1 + 6 + 24 = 65

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.

70 - 65 = 5
This NPI is valid
The calculated check digit is 5, which matches the last digit of 1659554285.

Other Providers at the Same Location


The following 19 providers are registered at the same or a nearby location.

Radiology (Radiation Oncology)
3581 PALMER DR, STE 303
CAMERON PARK, CA 95682
Family Medicine
3581 PALMER DR, SUITE 602
CAMERON PARK, CA 95682
Radiology (Radiation Oncology)
3581 PALMER DR, SUITE 303
CAMERON PARK, CA 95682
Nurse Practitioner
3581 PALMER DR, SUITE 608
CAMERON PARK, CA 95682
Nurse Practitioner
3581 PALMER DR, SUITE 602
CAMERON PARK, CA 95682
Radiology (Diagnostic Radiology)
3581 PALMER DR, SUITE 303
CAMERON PARK, CA 95682
Pediatrics
3581 PALMER DR, STE. 401
CAMERON PARK, CA 95682
Internal Medicine (Hematology & Oncology)
3581 PALMER DR, SUITE 202
CAMERON PARK, CA 95682
Allergy & Immunology
3581 PALMER DR, SUITE #203
CAMERON PARK, CA 95682
Family Medicine
3581 PALMER DR, SUITE 602
CAMERON PARK, CA 95682
Family Medicine
3581 PALMER DR, SUITE 602
CAMERON PARK, CA 95682
Nurse Practitioner (Family)
3581 PALMER DR, SUITE 602
CAMERON PARK, CA 95682
Internal Medicine
3581 PALMER DR, SUIT 602
CAMERON PARK, CA 95682
Internal Medicine (Hematology & Oncology)
3581 PALMER DR, SUITE 202
CAMERON PARK, CA 95682
Orthopaedic Surgery
3581 PALMER DR, SUITE 201
CAMERON PARK, CA 95682
Clinic/Center (Multi-Specialty)
3581 PALMER DR, SUITE 402
CAMERON PARK, CA 95682
Pediatrics
3581 PALMER DR, STE. 401
CAMERON PARK, CA 95682
Internal Medicine
3581 PALMER DR, STE. 401
CAMERON PARK, CA 95682
Physician Assistant (Medical)
3581 PALMER DR, STE. 401
CAMERON PARK, CA 95682

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1659554285, enumerated as an "organization" on December 05, 2007.

The provider is located at 3581 PALMER DR SUITE 400 CAMERON PARK, CA 95682 and the phone number is (530) 676-6600.

Internal Medicine with taxonomy code 207RH0003X and a focus in Hematology & Oncology.