DR. RYAN MAYER M.D.
NPI 1255793527
Orthopaedic Surgery - Orthopaedic Trauma in Pomona, CA

NPI Status: Active since March 24, 2016

Contact Information

160 E ARTESIA ST STE 255
POMONA, CA
ZIP 91767
Phone: (095) 964-3469
Fax: (095) 964-3449

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  • Individual
  • Male
  • Years of Experience 10
  • Orthopaedic Surgery
  • Orthopaedic Trauma
  • Accepts Medicare Approved Payment
  • PECOS Enrolled

About RYAN MAYER

This page provides the complete NPI Profile along with additional information for Ryan Mayer, a provider established in Pomona, California with a medical specialization in Orthopaedic Surgery, focusing in orthopaedic trauma and more than 10 years of experience. He graduated from University Of California, Irvine, California College Of Medicine in 2016. The healthcare provider is registered in the NPI registry with number 1255793527 assigned on March 2016. The practitioner's primary taxonomy code is 207XX0801X with license number A178874 (CA). The provider is registered as an individual and his NPI record was last updated August 2025.

NPI
1255793527
Provider Name
DR. RYAN MAYER M.D.
Gender
Male
Entity Type
Individual
Location Address
160 E ARTESIA ST STE 255 POMONA, CA 91767
Location Phone
(095) 964-3469
Location Fax
(095) 964-3449
Mailing Address
160 E ARTESIA ST STE 255 POMONA, CA 91767
Mailing Phone
(095) 964-3469
Mailing Fax
(095) 964-3449
Medical School Name
UNIVERSITY OF CALIFORNIA, IRVINE, CALIFORNIA COLLEGE OF MEDICINE
Graduation Year
2016
Is Sole Proprietor?
No
Enumeration Date
03-24-2016
Last Update Date
08-06-2025
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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

Orthopaedic Surgery Orthopaedic Trauma

Taxonomy Code
207XX0801X
Type
Allopathic & Osteopathic Physicians
License No.
A178874
License State
CA
Taxonomy Description
Recognized by several state medical boards as a fellowship subspecialty program of orthopaedic surgery, orthopaedic trauma surgeons deal with the evaluation and management of acute orthopaedic injuries, evaluation and treatment of post-traumatic deformities and nonunions, acute and delayed reconstruction of pelvic and acetabular fractures, as well as osteotomy in the adult hip for treatment of hip arthritis.

Medicare Participation & PECOS Enrollment Status

Ryan Mayer is registered with Medicare and accepts claims assignment, this means the provider accepts the approved amount for the cost of rendered services as full payment. Participating providers may not charge beneficiaries more than the approved amount for their services. Please keep in mind that beneficiaries still have to pay a coinsurance or copayment amount for a visit or service.

Ryan Mayer 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

  • PECOS PAC ID: 4587936190

    What is the PECOS Associate Control ID?
    A PAC ID is a unique 10-digit number assigned to an individual or organization healthcare provider in PECOS. The PAC ID is used to link together all the provider information, like tax identification numbers and organizational names. A PAC ID can be connected to multiple Enrollment IDs if an individual or organization has enrolled in PECOS more than once.

  • PECOS Enrollment ID: I20220727002624

    What is the Provider Enrollment ID?
    The Enrollment ID is a unique alphanumeric 15-digit code assigned to each new provider's PECOS enrollment application. The Enrollment ID is used to link together all the provider enrollment information like enrollment type, state, provider specialty, and reassignment of benefits.

  • Accepts Medicare Assignment? Yes

    What does it mean "accepts medicare assignment"?
    When a provider accepts Medicare assignment, the provider agrees to be paid directly by Medicare and to accept the payment amount approved by Medicare. Additionally, the provider agrees to not bill patients for more than the Medicare deductible and coinsurance amounts.
    A provider who doesn't accept assignment may charge you up to 15% over the Medicare-approved amount. This is known as the limiting charge. You may have to pay this amount, or it may be covered by another insurer.

  • 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.

Hip replacement

A hip replacement is a surgical procedure where a worn-out or damaged hip joint is replaced with an artificial one. This procedure can greatly reduce pain and improve mobility. It's often recommended when other treatments like physical therapy or medications fail to alleviate symptoms.

This service was performed for 1-10 patients

Initial hospital inpatient care per day, typically 70 minutes

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

This service was performed 16 times for 16 patients

Upper limb (arm) arthroscopy (minimally invasive joint repair)

Upper limb arthroscopy is a minimally invasive procedure used to examine and treat issues within your arm's joints. A small camera, called an arthroscope, is inserted through a tiny incision, providing a clear view of the joint. This method often results in less pain and faster recovery compared to open surgery.

This service was performed for 1-10 patients

Reviews for DR. RYAN MAYER M.D.

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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.
1255793527
Step 1: Double the value of the alternate digits, beginning with the rightmost digit.
22105149654
Step 2: Add all the doubled and unaffected individual digits from step 1 plus the constant number 24.
2 + 2 + 1 + 0 + 5 + 1 + 4 + 9 + 6 + 5 + 4 + 24 = 63
Step 3: Subtract the total obtained in step 2 from the next higher number ending in zero, the result is the check digit.
70 - 63 = 77

The NPI number 1255793527 is valid because the calculated check digit 7 using the Luhn validation algorithm matches the last digit of the original NPI number.

Other Providers at the Same Location


The following 11 providers are registered at the same or nearby location.

NPI Name / Type Taxonomy Address
1982854626DR. HRAYR G BASMAJIAN M.D., M.S.
Individual
Orthopaedic Surgery (Orthopaedic Trauma)160 E ARTESIA ST STE 255
POMONA, CA 91767
(909) 596-4346
1467711713DR. CHRISTOPHER BARRETT HAYES M.D.
Individual
Orthopaedic Surgery (Orthopaedic Trauma)160 E ARTESIA ST STE 255
POMONA, CA 91767
(909) 596-4346
1164983375 AMANDA BALLARD PA-C
Individual
Physician Assistant160 E ARTESIA ST STE 255
POMONA, CA 91767
(909) 596-4346
1861071508RENU ORTHOPEDICS, PMC
Organization
Orthopaedic Surgery160 E ARTESIA ST STE 255
POMONA, CA 91767
(909) 596-4346
1457085763 WINSTON HSIEH
Individual
Physician Assistant160 E ARTESIA ST STE 255
POMONA, CA 91767
(909) 596-4346
1306683321 HAYLEY MARIE WISHNER PA-C
Individual
Physician Assistant160 E ARTESIA ST STE 255
POMONA, CA 91767
(909) 596-4346
1225700321 JAMES TYLER ATKINS DPT
Individual
Physical Therapist (Orthopedic)160 E ARTESIA ST STE 255
POMONA, CA 91767
(909) 596-4346
1265147201 BENJAMIN THOMSON PA-C
Individual
Physician Assistant160 E ARTESIA ST STE 255
POMONA, CA 91767
(909) 596-4346
1407304439PREMIER ORTHOPAEDIC TRAUMA SPECIALISTS, PMC
Organization
Orthopaedic Surgery160 E ARTESIA ST STE 255
POMONA, CA 91767
(909) 596-4346
1497218739 BRIAN M BALLARD
Individual
Preventive Medicine (Occupational Medicine)160 E ARTESIA ST STE 255
POMONA, CA 91767
(095) 964-3469
1154689248DR. JOSEPH LIU M.D.
Individual
Orthopaedic Surgery (Sports Medicine)160 E ARTESIA ST STE 255
POMONA, CA 91767
(909) 596-4346

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1255793527, enumerated in the NPI registry as an "individual" on March 24, 2016

The provider is located at 160 E Artesia St Ste 255 Pomona, Ca 91767 and the phone number is (095) 964-3469

The provider's speciality is Orthopaedic Surgery with taxonomy code 207XX0801X with a focus in Orthopaedic Trauma

The provider has more than 10 years of experience. He graduated from University Of California, Irvine, California College Of Medicine in 2016.

Yes, as of June 20, 2025 the provider is registered in PECOS and is eligible to order health care services or supplies for Medicare patients. If you are a beneficiary 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.

The most common procedures or services performed by this practitioner are: Hip replacement, Initial hospital inpatient care per day, typically 70 minutes and Upper limb (arm) arthroscopy (minimally invasive joint repair).

This NPI record was last updated on March 24, 2016. To officially update your NPI information contact the National Plan and Provider Enumeration System (NPPES) at 1-800-465-3203 (NPI Toll-Free) or by email at [email protected].
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