RIHUA CHEN DPM
NPI 1659013431
Podiatrist - Foot & Ankle Surgery in Biddeford, ME

NPI Status: Active since April 11, 2022

Contact Information

443 MAIN ST
BIDDEFORD, ME
ZIP 04005
Phone: (646) 309-6923

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

Individual
Male
Podiatrist
Foot & Ankle Surgery
PECOS Enrolled

About RIHUA CHEN

This page provides the complete NPI Profile along with additional information for Rihua Chen, a provider established in Biddeford, Maine with a medical specialization in Podiatrist, focusing in foot & ankle surgery . The healthcare provider is registered in the NPI registry with number 1659013431 assigned on April 2022. The practitioner's primary taxonomy code is 213ES0103X with license number POD1141 (ME). The provider is registered as an individual and his NPI record was last updated March 2026.

NPI: 1659013431
Provider Name: RIHUA CHEN DPM
Gender: Male
Entity Type: Individual
Location Address: 443 MAIN ST BIDDEFORD, ME 04005
Location Phone: (646) 309-6923
Mailing Address: 443 MAIN ST BIDDEFORD, ME 04005
Mailing Phone: (646) 309-6923
Is Sole Proprietor?: No
Enumeration Date: 04-11-2022
Last Update Date: 03-04-2026
Code Navigator

Location Map

Secondary Locations

1 Medical Center Dr
Biddeford, ME 04005
(207) 283-7980
25A June St Ste 12
Sanford, ME 04073
(207) 490-7495

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: Podiatrist Foot & Ankle Surgery
Taxonomy Code: 213ES0103X
Type: Podiatric Medicine & Surgery Service Providers
License No.: POD1141
License State: ME

Medicare Participation & PECOS Enrollment Status

Rihua Chen 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) and a Home Health Agency (HHA).

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: No

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 1659013431, we treat the final digit (1) 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 59. The final step is to find the difference between that total and the next multiple of ten (60 - 59 = 1).

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 → 10 → 1 + 0

Pos 4

Unchanged

Pos 5

Doubled → 0

Pos 6

Unchanged

Pos 7

Doubled → 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 5 → 10 → 1 0 → 0 3 → 6 3 → 6

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 + 0 + 1 + 6 + 4 + 6 + 24 = 59

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

The next multiple of ten after 59 is 60. The difference is the calculated check digit.

60 - 59 = 1

This NPI is valid

The calculated check digit is 1, which matches the last digit of 1659013431.