FRANK WAICHUNG ZHANG DO
NPI 1942729124
Internal Medicine - Pulmonary Disease in Santa Monica, CA

NPI Status: Active since September 19, 2017

Contact Information

1223 16TH ST STE 3400
SANTA MONICA, CA
ZIP 90404
Phone: (310) 449-0939

NPI Profile Information
Primary Taxonomy
Medicare Participation & PECOS Status
Areas of Expertise
Physician Visit Costs
NPI Validation
Other Providers Same Location
Frequently Asked Questions

Individual
Male
Internal Medicine
Pulmonary Disease
PECOS Enrolled

About FRANK ZHANG

This page provides the complete NPI Profile along with additional information for Frank Zhang, an internist established in Santa Monica, California with a medical specialization in Internal Medicine, focusing in pulmonary disease . The healthcare provider is registered in the NPI registry with number 1942729124 assigned on September 2017. The practitioner's primary taxonomy code is 207RP1001X with license number 20A16737 (CA). The provider is registered as an individual and his NPI record was last updated January 2026.

NPI: 1942729124
Provider Name: FRANK WAICHUNG ZHANG DO
Gender: Male
Entity Type: Individual
Location Address: 1223 16TH ST STE 3400 SANTA MONICA, CA 90404
Location Phone: (310) 449-0939
Mailing Address: 5767 W CENTURY BLVD STE 400 LOS ANGELES, CA 90045
Mailing Phone: (310) 301-8707
Is Sole Proprietor?: No
Enumeration Date: 09-19-2017
Last Update Date: 01-05-2026
Code Navigator

An internist like Frank Zhang 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 Pulmonary Disease
Taxonomy Code: 207RP1001X
Type: Allopathic & Osteopathic Physicians
License No.: 20A16737
License State: CA
Taxonomy Description: An internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational and environmental diseases, bronchitis, sleep disorders, emphysema and other complex disorders of the lungs.

Medicare Participation & PECOS Enrollment Status

Frank Zhang 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

Areas of Expertise

The following services and procedures, recently provided to Medicare patients, illustrate the range of care this provider offers. This list reflects the variety of services available to all patients visiting the practice and is based on 2022 Medicare dataset. In general, the more frequently a provider treats specific conditions or performs particular procedures, the more experienced they become in addressing similar patient needs. The provider has delivered many of the services listed below to Medicare patients. Please note that this list does not include services provided to patients who are not covered by Medicare.

Follow-up hospital inpatient care per day, typically 25 minutes

Physician Visit Costs

The pricing information below displays the copayment minimum, maximum and average amount that patients under Medicare are charged when visiting this provider as a new or established patient. Please keep in mind that these prices are just for reference purposes, and the actual prices charged by the provider might be different.

For patients covered under private health plans the prices below are also useful as healthcare pricing for private insurance is usually established as a function of Medicare prices. Private insurance covered patients should check their individual plans to determine the exact pricing.

The prices below reflect the costs for new and established patients in the 90404 ZIP code area.

New Patients Visit Costs *

The most utilized procedure code for new patients office visits is 99204

Average New Patient Price $142.39
Minimum New Patient Price $62.96
Maximum New Patient Price $187.6

Average New Patient Copayment $35.59
Minimum New Patient Copayment $15.74
Maximum New Patient Copayment $46.9

Established Patients Visit Costs *

The most utilized procedure code for established patients office visits is 99214

Average Established Patient Price $109.96
Minimum Established Patient Price $20.84
Maximum Established Patient Price $153.61

Average Established Patient Copayment $27.49
Minimum Established Patient Copayment $5.21
Maximum Established Patient Copayment $38.4

* The physician office visit costs information is generated by statistical analysis of similar providers in the same geographical area. The pricing information above IS NOT the amount charged by this provider.

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 1942729124, we treat the final digit (4) 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 66. The final step is to find the difference between that total and the next multiple of ten (70 - 66 = 4).

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 → 8

Pos 4

Unchanged

Pos 5

Doubled → 14 → 1 + 4

Pos 6

Unchanged

Pos 7

Doubled → 18 → 1 + 8

Pos 8

Unchanged

Pos 9

Doubled → 4

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 4 → 8 7 → 14 → 5 9 → 18 → 9 2 → 4

Step 2: Add all digits plus the NPI constant

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

2 + 9 + 8 + 2 + 1 + 4 + 2 + 1 + 8 + 1 + 4 + 24 = 66

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

The next multiple of ten after 66 is 70. The difference is the calculated check digit.

70 - 66 = 4

This NPI is valid

The calculated check digit is 4, which matches the last digit of 1942729124.