DR. SHELLEY R. MARDER M.D.
NPI 1184648636
Internal Medicine - Rheumatology in San Francisco, CA

NPI Status: Active since July 27, 2006

Contact Information

2200 OFARRELL ST
SAN FRANCISCO, CA
ZIP 94115
Phone: (415) 833-2000
Fax: (415) 353-8570

NPI Profile Information
Primary Taxonomy
Secondary Taxonomies
Insurance Plans Accepted
NPI Validation
Other Providers Same Location
Frequently Asked Questions

Individual
Female
Internal Medicine
Rheumatology

About SHELLEY MARDER

This page provides the complete NPI Profile along with additional information for Shelley Marder, an internist established in San Francisco, California with a medical specialization in Internal Medicine, focusing in rheumatology . The healthcare provider is registered in the NPI registry with number 1184648636 assigned on July 2006. The practitioner's primary taxonomy code is 207RR0500X with license number G46906 (CA). The provider is registered as an individual and her NPI record was last updated one year ago.

NPI: 1184648636
Provider Name: DR. SHELLEY R. MARDER M.D.
Gender: Female
Entity Type: Individual
Location Address: 2200 OFARRELL ST SAN FRANCISCO, CA 94115
Location Phone: (415) 833-2000
Location Fax: (415) 353-8570
Mailing Address: 65 DORANTES AVE SAN FRANCISCO, CA 94116
Mailing Phone: (415) 833-6012
Is Sole Proprietor?: No
Enumeration Date: 07-27-2006
Last Update Date: 09-11-2025
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An internist like Shelley Marder 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 Rheumatology
Taxonomy Code: 207RR0500X
Type: Allopathic & Osteopathic Physicians
License No.: G46906
License State: CA
Taxonomy Description: An internist who treats diseases of joints, muscle, bones and tendons. This specialist diagnoses and treats arthritis, back pain, muscle strains, common athletic injuries and collagen diseases.

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	G46906 (CA)
2	2085R0202X	Allopathic & Osteopathic Physicians	Radiology Diagnostic Radiology	G46906 (CA)

Insurance Plans Accepted

According to publicly available information the provider might be accepting the following health plans from these health insurance companies:

Medicare

Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.

Medicaid

Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.

*Please verify directly with this provider to make sure your insurance plan is currently accepted.

Additional Identifiers

The NPI Enumerator encourages providers to submit additional identifiers with their NPI application although the submission of this information is optional. The additional identifier(s) section includes other numbers or codes currently or formerly used as an identifier for the provider by other public healthcare entities. The identifiers may include UPIN, NSC, OSCAR, DEA, Medicaid State or PIN identification numbers.

Identifier	Type / Code	Identifier State	Identifier Issuer
00G469060	MEDICAID (05)	CA

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 1184648636, we treat the final digit (6) 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 64. The final step is to find the difference between that total and the next multiple of ten (70 - 64 = 6).

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 → 16 → 1 + 6

Pos 4

Unchanged

Pos 5

Doubled → 12 → 1 + 2

Pos 6

Unchanged

Pos 7

Doubled → 16 → 1 + 6

Pos 8

Unchanged

Pos 9

Doubled → 6

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 8 → 16 → 7 6 → 12 → 3 8 → 16 → 7 3 → 6

Step 2: Add all digits plus the NPI constant

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

2 + 1 + 1 + 6 + 4 + 1 + 2 + 4 + 1 + 6 + 6 + 6 + 24 = 64

Step 3: Find the amount needed to reach the next multiple of 10

The next multiple of ten after 64 is 70. The difference is the calculated check digit.

70 - 64 = 6

This NPI is valid

The calculated check digit is 6, which matches the last digit of 1184648636.