JOHN W. RIORDAN, MD
NPI 1124217443
Specialist in San Francisco, CA

NPI Status: Active since October 23, 2007

Contact Information

2100 WEBSTER ST
STE 412
SAN FRANCISCO, CA
ZIP 94115
Phone: (415) 923-3815
Fax: (415) 749-5713

NPI Profile Information
Primary Taxonomy
Group Taxonomy
Insurance Plans Accepted
Authorized Official
NPI Validation
Other Providers Same Location
Frequently Asked Questions

Organization
Specialist

About JOHN W. RIORDAN, MD

This page provides the complete NPI Profile along with additional information for John W. Riordan, Md, a provider established in San Francisco, California operating as a Specialist. The healthcare provider is registered in the NPI registry with number 1124217443 assigned on October 2007. The practitioner's primary taxonomy code is 174400000X with license number A052155 (CA). The provider is registered as an organization and their NPI record was last updated 18 years ago. The organization operates as a single speciality business group with one or more individual providers who practice the same area of specialization. The authorized official of this NPI record is Dr. John William Riordan M.d. (Md)

NPI: 1124217443
Provider Name: JOHN W. RIORDAN, MD
Entity Type: Organization
Location Address: 2100 WEBSTER ST STE 412 SAN FRANCISCO, CA 94115
Location Phone: (415) 923-3815
Location Fax: (415) 749-5713
Mailing Address: 2100 WEBSTER ST STE 412 SAN FRANCISCO, CA 94115
Mailing Phone: (415) 923-3815
Mailing Fax: (415) 749-5713
Is Sole Proprietor?: No
Is Organization Subpart?: No
Enumeration Date: 10-23-2007
Last Update Date: 10-23-2007
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: Specialist
Taxonomy Code: 174400000X
Type: Other Service Providers
License No.: A052155
License State: CA
Taxonomy Description: An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.

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.

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.

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: DR. JOHN WILLIAM RIORDAN M.D.
Authorized Official Title: MD
Authorized Official Phone: (415) 923-3815

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
A052155	OTHER (01)	CA	LICENSE NUMBER
ZZZ459972Z	MEDICARE PIN (08)	CA
GR0068330	MEDICAID (05)	CA
F78574	MEDICARE UPIN (02)	CA

NPI Validation Check Digit Calculation

The following table explains the step by step NPI number validation process using the ISO standard Luhn algorithm.

Start with the original NPI number, the last digit is the check digit and is not used in the calculation.
1	1	2	4	2	1	7	4	4	3
Step 1: Double the value of the alternate digits, beginning with the rightmost digit.
2	1	4	4	4	1	14	4	8
Step 2: Add all the doubled and unaffected individual digits from step 1 plus the constant number 24.
2 + 1 + 4 + 4 + 4 + 1 + 1 + 4 + 4 + 8 + 24 = 57
Step 3: Subtract the total obtained in step 2 from the next higher number ending in zero, the result is the check digit.
60 - 57 = 3									3

The NPI number 1124217443 is valid because the calculated check digit 3 using the Luhn validation algorithm matches the last digit of the original NPI number.

Other Providers at the Same Location

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

DR. ARLENE F. HOFFMAN DPM, PHD

Podiatrist

2100 WEBSTER ST
STE 202
SAN FRANCISCO, CA
ZIP 94115

About JOHN W. RIORDAN, MD

Location Map

Specialty - Primary Taxonomy

Specialist

Group Taxonomy 193400000X SINGLE SPECIALTY GROUP

Insurance Plans Accepted

Medicare

Medicaid

Authorized Official

DR. JOHN WILLIAM RIORDAN M.D.

Additional Identifiers

Reviews for JOHN W. RIORDAN, MD

NPI Validation Check Digit Calculation

Other Providers at the Same Location

Frequently Asked Questions

What is JOHN W. RIORDAN, MD's NPI number?

Where is the provider located?

What is the provider's specialty?

What insurance does JOHN W. RIORDAN, MD accept?