ROBERT STEPHEN WALKER MD
NPI 1639531908
Orthopaedic Surgery - Hand Surgery in Scottsdale, AZ
NPPES record last updated: November 4, 2025. Verified against the NPPES registry weekly; last sync: July 19, 2026.
Record update history: Nov 4, 2025, Aug 11, 2022, Mar 24, 2016 (3 updates tracked since 2016).
- Individual
- Male
- Years of Experience 6
- Orthopaedic Surgery
- Hand Surgery
- Accepts Insurance
- Accepts Medicare Approved Payment
- PECOS Enrolled
About ROBERT WALKER
This page provides the complete NPI Profile along with additional information for Robert Walker, a provider established in Scottsdale, Arizona with a medical specialization in Orthopaedic Surgery, focusing in hand surgery and more than 6 years of experience. He graduated from University Of Arizona College Of Medicine - Phoenix in 2021. The healthcare provider is registered in the NPI registry with number 1639531908 assigned on March 2016. The practitioner's primary taxonomy code is 207XS0106X with license number 65804 (AZ). The provider is registered as an individual and his NPI record was last updated one year ago.
- NPI
- 1639531908
- Provider Name
- ROBERT STEPHEN WALKER MD
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 7960 E THOMPSON PEAK PKWY SCOTTSDALE, AZ 85255
- Location Phone
- (877) 821-4657
- Mailing Address
- 7960 E THOMPSON PEAK PKWY STE 104 SCOTTSDALE, AZ 85255
- Mailing Phone
- (877) 821-4657
- Medical School Name
- UNIVERSITY OF ARIZONA COLLEGE OF MEDICINE - PHOENIX
- Graduation Year
- 2021
- Is Sole Proprietor?
- No
- Enumeration Date
- 03-24-2016
- Last Update Date
- 11-04-2025
- 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
Orthopaedic Surgery Hand Surgery
- Taxonomy Code
- 207XS0106X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- 65804
- License State
- AZ
- Taxonomy Description
- An orthopaedic surgeon trained in the investigation, preservation and restoration by medical, surgical and rehabilitative means of all structures of the upper extremity directly affecting the form and function of the hand and wrist.
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 | 207X00000X | Allopathic & Osteopathic Physicians | Orthopaedic Surgery | 65804 (AZ) |
Insurance Plans Accepted
According to publicly available information the provider might be accepting the following health plans from these health insurance companies:
- Choice Bronze HSA - HMO
- Choice Bronze HSA + Vision + Adult Dental - HMO
- Complete Gold - HMO
- Complete Gold + Vision + Adult Dental - HMO
- Complete Silver - HMO
- Complete Silver + Vision + Adult Dental - HMO
- Elite Gold - HMO
- Elite Gold + Vision + Adult Dental - HMO
- Everyday Bronze - HMO
- Everyday Bronze + Vision + Adult Dental - HMO
- Standard Expanded Bronze - HMO
- Standard Expanded Bronze + Vision + Adult Dental - HMO
- Standard Gold - HMO
- Standard Gold + Vision + Adult Dental - HMO
- Standard Silver - HMO
- Standard Silver + Vision + Adult Dental - HMO
- Bronze Classic Standard - HMO
- Bronze Elite + PCP Saver Plus - HMO
- Bronze Simple - HMO
- Bronze Simple Breathe Easy with Enhanced COPD Benefits - HMO
- Bronze Simple Chronic Care CKM - HMO
- Buena Salud Bronce Simple Para Diabetes - HMO
- Gold Classic - HMO
- Gold Classic Standard - HMO
- Gold Simple - HMO
- Gold Simple Diabetes - HMO
- Silver Classic Standard - HMO
- Silver Elite Saver Plus - HMO
- Silver Simple Chronic Care CKM - HMO
- Silver Simple Diabetes - HMO
- Silver Simple PCP Saver - HMO
- Silver Simple Specialist Saver with COPD - HMO
- Silver Simple Women's Health with Menopause Benefits - HMO
- UHC Bronze Copay Focus $0 Indiv Med Ded ($0 Virtual Urgent Care) - HMO
- UHC Bronze Copay Focus+ $0 Indiv Med Ded ($0 Virtual Urgent Care, Dental + Vision) - HMO
- UHC Bronze Essential ($0 Virtual Urgent Care) - HMO
- UHC Bronze Standard - HMO
- UHC Bronze Standard+ (Dental + Vision) - HMO
- UHC Gold Advantage ($0 Virtual Urgent Care, $3 Tier 2 Rx) - HMO
- UHC Gold Advantage+ ($0 Virtual Urgent Care, $3 Tier 2 Rx, Dental + Vision) - HMO
- UHC Gold Copay Focus $0 Indiv Med Ded ($0 Virtual Urgent Care, $3 Tier 2 Rx) - HMO
- UHC Gold Standard - HMO
- UHC Silver Advantage ($0 Virtual Urgent Care, $8 Tier 2 Rx) - HMO
- UHC Silver Advantage+ ($0 Virtual Urgent Care, $8 Tier 2 Rx, Dental + Vision) - HMO
- UHC Silver Copay Focus $0 Indiv Med Ded ($0 Virtual Urgent Care) - HMO
- UHC Silver Copay Focus+ $0 Indiv Med Ded ($0 Virtual Urgent Care, Dental + Vision) - HMO
- UHC Silver Standard - HMO
*Please verify directly with this provider to make sure your insurance plan is currently accepted.
Medicare Participation & PECOS Enrollment Status
Robert Walker 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.
Robert Walker 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: 4486912243
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: I20220824003090
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.
Aspiration and/or injection of fluid from large joint
Aspiration and/or injection of fluid from medium joint
Closed treatment of broken top of upper arm bone
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more
Fluoroscopic guidance for needle placement
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes
Injection into tendon or ligament
Injection, triamcinolone acetonide, not otherwise specified, 10 mg
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
Remote therapeutic monitoring treatment management services by physician or other qualified health care professional, each additional 20 minutes per calendar month
Remote therapeutic monitoring treatment management services by physician or other qualified health care professional, first 20 minutes per calendar month
Set-up and patient education for remote monitoring of therapy
Test or measurement for functional capacity, each 15 minutes
Treatment of broken neck of thigh bone with bone implant
Treatment of upper end of broken thigh bone with placement of stabilizing device or prosthetic replacement
X-ray of elbow, 2 views
X-ray of hand, minimum of 3 views
X-ray of wrist, minimum of 3 views
This procedure involves using a needle to remove (aspiration) or introduce (injection) fluid into a large joint like the knee or hip. It can help diagnose conditions, relieve discomfort, or deliver medication directly to the joint.
This service was performed 119 times for 82 patientsThis procedure involves a needle being inserted into a medium-sized joint, such as a knee or shoulder, to remove (aspirate) excess fluid. Sometimes, medication may also be injected into the joint to reduce inflammation and pain.
This service was performed 14 times for 13 patientsClosed treatment of a broken top of the upper arm bone involves non-surgical methods to heal the fracture. This may include immobilization with a cast or brace, pain management, and physical therapy exercises to restore movement and strength once healing begins.
This service was performed 14 times for 14 patientsThis is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
This service was performed 173 times for 136 patientsThis is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
This service was performed 175 times for 123 patientsThis is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.
This service was performed 45 times for 45 patientsFluoroscopic guidance for needle placement is a medical procedure that uses a special X-ray technology to help accurately place a needle in the body. It's often used in biopsies, injections or other treatments to ensure precision and safety.
This service was performed 150 times for 109 patientsInitial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
This service was performed 24 times for 24 patientsAn injection into a tendon or ligament involves placing medication directly into these areas to help reduce inflammation and pain. It's often used for conditions like arthritis or tendonitis. The procedure is quick and usually involves a local anesthetic.
This service was performed 87 times for 60 patientsTriamcinolone acetonide is a medication used to reduce inflammation in the body. It's given as a 10 mg injection for conditions like allergies, arthritis, or skin problems. The injection helps to decrease swelling, redness, and itching.
This service was performed 821 times for 147 patientsThis service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.
This service was performed 99 times for 99 patientsThis is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
This service was performed 66 times for 66 patientsRemote therapeutic monitoring treatment management services involve a healthcare professional monitoring your health remotely. They evaluate data from medical devices, adjust your treatment plan if necessary, and communicate with you about your health. This service is for an additional 20 minutes per month.
This service was performed 97 times for 33 patientsRemote therapeutic monitoring treatment management services involve a healthcare professional monitoring your health data remotely. This could include vital signs or other health information. The professional will manage your treatment for the first 20 minutes each month, adjusting as necessary based on the data received.
This service was performed 93 times for 38 patientsRemote therapy monitoring involves using digital devices to track your health and treatment progress from home. You'll receive a device to record health data, like heart rate or blood sugar. This data is shared with your healthcare team, allowing them to adjust your treatment as needed.
This service was performed 30 times for 30 patientsThis procedure measures your functional capacity, or ability to perform tasks, over 15-minute intervals. It can help identify limitations or improvements in your physical abilities. The test may involve activities like walking, lifting, or bending.
This service was performed 61 times for 31 patientsThis procedure involves repairing a fractured thigh bone by inserting a bone implant. The implant helps stabilize the bone, allowing it to heal correctly. It's performed under anesthesia and requires a hospital stay for recovery.
This service was performed 17 times for 17 patientsThis procedure involves treating a fracture at the top of your thigh bone. A stabilizing device or prosthetic replacement is placed to aid in healing. This helps restore mobility and function while reducing pain. The treatment aims for a quick and safe recovery.
This service was performed 21 times for 21 patientsAn elbow X-ray, 2 views, is a quick, painless imaging test. It uses a small amount of radiation to produce detailed images of your elbow from two different angles. This helps in diagnosing conditions like fractures, infection, or arthritis. It's a safe and effective way to monitor your elbow health.
This service was performed 20 times for 14 patientsAn X-ray of the hand, minimum of 3 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of the bones in your hand from different angles. This helps in diagnosing fractures, infections, arthritis, or other abnormalities. It's quick and painless.
This service was performed 51 times for 40 patientsAn X-ray of the wrist, minimum of 3 views, is a diagnostic procedure that uses radiation to create images of your wrist from different angles. This helps detect fractures, infections, or other abnormalities for accurate diagnosis and treatment planning.
This service was performed 25 times for 21 patientsPhysician Visit Costs
The typical physician office visit costs for Medicare beneficiaries in this area are: $21.47 for a new patient copayment and $17.31 for an established patient copayment.
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 85255 ZIP code area.
New Patients Visit Costs *
The most utilized procedure code for new patients office visits is 99203
- Average New Patient Price $85.89
- Minimum New Patient Price $55.44
- Maximum New Patient Price $168.6
- Average New Patient Copayment $21.47
- Minimum New Patient Copayment $13.86
- Maximum New Patient Copayment $42.15
Established Patients Visit Costs *
The most utilized procedure code for established patients office visits is 99213
- Average Established Patient Price $69.24
- Minimum Established Patient Price $17.72
- Maximum Established Patient Price $137.41
- Average Established Patient Copayment $17.31
- Minimum Established Patient Copayment $4.43
- Maximum Established Patient Copayment $34.35
* 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.
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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 1639531908, we treat the final digit (8) 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 62. The final step is to find the difference between that total and the next multiple of ten (70 - 62 = 8).
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.
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.
Step 2: Add all digits plus the NPI constant
Add the transformed values, the unchanged digits, and the constant 24.
Step 3: Find the amount needed to reach the next multiple of 10
The next multiple of ten after 62 is 70. The difference is the calculated check digit.
Other Providers at the Same Location
The following 5 providers are registered at the same or a nearby location.
SCOTTSDALE, AZ 85255
SCOTTSDALE, AZ 85255
SCOTTSDALE, AZ 85255
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1639531908, enumerated as an "individual" on March 24, 2016.
The provider is located at 7960 E THOMPSON PEAK PKWY SCOTTSDALE, AZ 85255 and the phone number is (877) 821-4657.
Orthopaedic Surgery with taxonomy code 207XS0106X and a focus in Hand Surgery.
The provider might be accepting Accepts: Ambetter from Arizona Complete Health, Oscar. Please consult your insurance carrier or call the provider to verify.