JOSEPH WILLIAMSON III PA-C
NPI 1326849407
Physician Assistant in Greer, SC
NPI Status: Active since March 24, 2025
Contact Information
405 LANCASTER AVE
GREER, SC
ZIP 29650
Phone: (864) 977-7000
- Individual
- Male
- Years of Experience 2
- Physician Assistant
- Accepts Insurance
- Accepts Medicare Approved Payment
- PECOS Enrolled
About JOSEPH WILLIAMSON
This page provides the complete NPI Profile along with additional information for Joseph Williamson, a primary care provider established in Greer, South Carolina with a medical specialization in Physician Assistant and more than 2 years of experience. The healthcare provider is registered in the NPI registry with number 1326849407 assigned on March 2025. The practitioner's primary taxonomy code is 363A00000X with license number 5815 (SC). The provider is registered as an individual and his NPI record was last updated one year ago.
- NPI
- 1326849407
- Provider Name
- JOSEPH WILLIAMSON III PA-C
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 405 LANCASTER AVE GREER, SC 29650
- Location Phone
- (864) 977-7000
- Mailing Address
- 405 LANCASTER AVE GREER, SC 29650
- Medical School Name
- OTHER
- Graduation Year
- 2024
- Is Sole Proprietor?
- No
- Enumeration Date
- 03-24-2025
- Last Update Date
- 06-10-2025
- Code Navigator
A primary care provider (PCP) like Joseph Williamson sees people with common medical problems. The primary care provider might be a doctor, physician assistant, nurse practitioner or clinic that are usually involved in your long-term care. A PCP might provide preventive care, treat common medical conditions, identify urgent medical problems and refer you to specialists when necessary. Primary care is usually provided in an outpatient facility but if you are admitted to a hospital your PCP may assist in your care. The most common medical conditions seen by primary care providers are: hypertension, upper respiratory tract infections, depression or anxiety, back pain, arthritis, dermatitis, diabetes, urinary tract infections, etc
Location Map
Secondary Locations
- 22580 Highway 76 E Ste 300
Laurens, SC 29360
(864) 939-1070 - 102 Rockcreek Blvd
Greenwood, SC 29649
(864) 725-5020
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
Physician Assistant
- Taxonomy Code
- 363A00000X
- Type
- Physician Assistants & Advanced Practice Nursing Providers
- License No.
- 5815
- License State
- SC
- Taxonomy Description
- A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
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 | 363A00000X | Physician Assistants & Advanced Practice Nursing Providers | Physician Assistant |
Insurance Plans Accepted
According to publicly available information the provider might be accepting the following health plans from these health insurance companies:
- Elite Bronze - HMO
- Elite Bronze + Vision + Adult Dental - HMO
- Everyday Bronze - HMO
- Everyday Bronze + Vision + Adult Dental - HMO
- Focused Silver - HMO
- Standard Expanded Bronze - HMO
- Standard Gold - HMO
- Standard Silver - HMO
- Standard Silver + Vision + Adult Dental - HMO
- Clear Silver with $0 Insulin Options - HMO
- Complete Gold - HMO
- Complete Gold + Vision + Adult Dental - HMO
- Complete Gold with Atrium Health - HMO
- Complete Gold with Atrium Health + Vision + Adult Dental - HMO
- Elite Bronze - HMO
- Elite Bronze + Vision + Adult Dental - HMO
- Elite Bronze with Atrium Health - HMO
- Elite Bronze with Atrium Health + Vision + Adult Dental - HMO
- Enhanced Asthma/COPD Care Silver with $0 Drug Options - HMO
- Enhanced Asthma/COPD Care Silver with $0 Drug Options + Vision + Adult Dental - HMO
- Everyday Bronze - HMO
- Everyday Bronze + Vision + Adult Dental - HMO
- Everyday Bronze with Atrium Health - HMO
- Everyday Bronze with Atrium Health + Vision + Adult Dental - HMO
- Focused Silver with Atrium Health - HMO
- Focused Silver with Atrium Health + Vision + Adult Dental - HMO
- Standard Expanded Bronze - HMO
- Standard Expanded Bronze + Vision + Adult Dental - HMO
- Standard Expanded Bronze with Atrium Health - HMO
*Please verify directly with this provider to make sure your insurance plan is currently accepted.
Medicare Participation & PECOS Enrollment Status
Joseph Williamson 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.
Joseph Williamson 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: 9335658509
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: I20250530002448
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
Physician Visit Costs
The typical physician office visit costs for Medicare beneficiaries in this area are: $20.79 for a new patient copayment and $16.78 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 29650 ZIP code area.
New Patients Visit Costs *
The most utilized procedure code for new patients office visits is 99203
- Average New Patient Price $83.18
- Minimum New Patient Price $53.57
- Maximum New Patient Price $163.84
- Average New Patient Copayment $20.79
- Minimum New Patient Copayment $13.39
- Maximum New Patient Copayment $40.96
Established Patients Visit Costs *
The most utilized procedure code for established patients office visits is 99213
- Average Established Patient Price $67.12
- Minimum Established Patient Price $16.96
- Maximum Established Patient Price $133.52
- Average Established Patient Copayment $16.78
- Minimum Established Patient Copayment $4.24
- Maximum Established Patient Copayment $33.38
* 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.
Find Provider Hospital Affiliations - Privileges
Doctors and physicians must apply for hospital privileges to treat patients at hospitals. Find out if your doctor has privileges to practice at your preferred hospital by using the hospital affiliation information below based on recent medical claims.
Hospital affiliation is identified through self-reporting data, inpatient, outpatient, physician and ancillary service claims linked by the medical claims NPI number and place of service code. Additionally, to further determine provider hospital affiliation the clinician must have provided services to at least three patients on three different dates in the last 12 months. Joseph Williamson is affiliated with the following medical facilities:
| Hospital Name | Address | Phone | Hospital Type | Overall Rating |
|---|---|---|---|---|
| SELF REGIONAL HEALTHCARE | 1325 SPRING STREET GREENWOOD, SC 29646 | (864) 227-4111 | Acute Care Hospitals |
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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 1326849407, we treat the final digit (7) 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 63. The final step is to find the difference between that total and the next multiple of ten (70 - 63 = 7).
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 63 is 70. The difference is the calculated check digit.
Other Providers at the Same Location
The following 8 providers are registered at the same or a nearby location.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1326849407, enumerated as an "individual" on March 24, 2025.
The provider is located at 405 LANCASTER AVE GREER, SC 29650 and the phone number is (864) 977-7000.
Physician Assistant with taxonomy code 363A00000X.
The provider might be accepting Accepts: Ambetter from Absolute Total Care and Ambetter of. Please consult your insurance carrier or call the provider to verify.
Joseph Williamson is affiliated with: SELF REGIONAL HEALTHCARE.