MS. GRETCHEN F TWEED PA-C
NPI 1386919256
Physician Assistant in Oakbrook Terrace, IL
NPI Status: Active since March 12, 2012
Contact Information
1 LINCOLN CTR STE 1030
OAKBROOK TERRACE, IL
ZIP 60181
Phone: (312) 319-1031
- Individual
- Female
- Physician Assistant
- PECOS Enrolled
About GRETCHEN TWEED
This page provides the complete NPI Profile along with additional information for Gretchen Tweed, a primary care provider established in Oakbrook Terrace, Illinois with a medical specialization in Physician Assistant. The healthcare provider is registered in the NPI registry with number 1386919256 assigned on March 2012. The practitioner's primary taxonomy code is 363A00000X with license number 2939 (CO). The provider is registered as an individual and her NPI record was last updated January 2026.
- NPI
- 1386919256
- Provider Name
- MS. GRETCHEN F TWEED PA-C
- Gender
- Female
- Entity Type
- Individual
- Location Address
- 1 LINCOLN CTR STE 1030 OAKBROOK TERRACE, IL 60181
- Location Phone
- (312) 319-1031
- Mailing Address
- 13044 KING CIR BROOMFIELD, CO 80020
- Mailing Phone
- (720) 507-5521
- Is Sole Proprietor?
- No
- Enumeration Date
- 03-12-2012
- Last Update Date
- 01-22-2026
- Code Navigator
A primary care provider (PCP) like Gretchen Tweed 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
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.
- 2939
- License State
- CO
- 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.
Insurance Plans Accepted
According to publicly available information the provider might be accepting the following health plans from these health insurance companies:
Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.
Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.
*Please verify directly with this provider to make sure your insurance plan is currently accepted.
Additional Identifiers
The NPI Enumerator encourages providers to submit additional identifiers with their NPI application although the submission of this information is optional. The additional identifier(s) section includes other numbers or codes currently or formerly used as an identifier for the provider by other public healthcare entities. The identifiers may include UPIN, NSC, OSCAR, DEA, Medicaid State or PIN identification numbers.
| Identifier | Type / Code | Identifier State | Identifier Issuer |
|---|---|---|---|
| 15109577 | MEDICAID (05) | CO |
Medicare Participation & PECOS Enrollment Status
Gretchen Tweed 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
Provider Referred Orders for Durable Medical Equipment, Devices & Supplies
The following list reflects the services, supplies or durable medical equipment ordered by this provider to a DME supplier on behalf of patients. The information below is derived from Medicare claims data and reflects the BETOS category, HCPCS code information and the number times each service was submitted under the Medicare fee-for-service program.
Durable Medical Equipment
DME-Oxygen and Supplies (DC000N)
Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing (HCPCS:E0431)
1 DME suppliers used 12 Medicare Claims 12 Services Paid
DME-Oxygen and Supplies (DC002N)
Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate (HCPCS:E1390)
1 DME suppliers used 12 Medicare Claims 12 Services Paid
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.
Established patient custodial care facility, group care, or assisted living visit, typically 1 hour
Established patient custodial care facility, group care, or assisted living visit, typically 15 minutes
Established patient custodial care facility, group care, or assisted living visit, typically 25 minutes
Established patient custodial care facility, group care, or assisted living visit, typically 40 minutes
Established patient office or other outpatient visit, 40-54 minutes
Follow-up nursing facility visit per day, typically 35 minutes
This service involves a healthcare professional visiting an established patient in a group care facility or assisted living for about an hour. The visit may include health checks, medication management, and addressing any health concerns to maintain the patient's well-being.
This service was performed 40 times for 31 patientsThis is a routine 15-minute visit for patients residing in care facilities like nursing homes or assisted living. During this visit, healthcare providers review the patient's health, manage medications, and address any concerns or changes in condition. It ensures continuous, quality care.
This service was performed 23 times for 14 patientsThis refers to a routine medical visit for an established patient living in a group care facility, custodial care, or assisted living. The visit typically lasts 25 minutes and includes a check-up and discussion about ongoing healthcare needs.
This service was performed 63 times for 27 patientsThis is a routine visit for established patients residing in care facilities like nursing homes or assisted living. The visit typically lasts about 40 minutes, during which the healthcare provider checks your overall health, discusses any concerns, and adjusts care plans as needed.
This service was performed 59 times for 34 patientsThis service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
This service was performed 14 times for 11 patientsA follow-up nursing facility visit is a routine check-up that typically lasts about 35 minutes. During this visit, your health status is evaluated, any changes in your condition are noted, and necessary adjustments to your care plan are made. It's an essential part of maintaining your health.
This service was performed 12 times for 11 patientsPhysician 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 60181 ZIP code area.
New Patients Visit Costs *
The most utilized procedure code for new patients office visits is 99203
- Average New Patient Price $93.02
- Minimum New Patient Price $59.81
- Maximum New Patient Price $181.38
- Average New Patient Copayment $23.25
- Minimum New Patient Copayment $14.95
- Maximum New Patient Copayment $45.34
Established Patients Visit Costs *
The most utilized procedure code for established patients office visits is 99213
- Average Established Patient Price $74.38
- Minimum Established Patient Price $19.15
- Maximum Established Patient Price $147.12
- Average Established Patient Copayment $18.59
- Minimum Established Patient Copayment $4.78
- Maximum Established Patient Copayment $36.78
* 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 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 1386919256, we treat the final digit (6) 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 64. The final step is to find the difference between that total and the next multiple of ten (70 - 64 = 6).
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 64 is 70. The difference is the calculated check digit.
Other Providers at the Same Location
The following 1 provider is registered at the same or a nearby location.
OAKBROOK TERRACE, IL 60181
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1386919256, enumerated as an "individual" on March 12, 2012.
The provider is located at 1 LINCOLN CTR STE 1030 OAKBROOK TERRACE, IL 60181 and the phone number is (312) 319-1031.
Physician Assistant with taxonomy code 363A00000X.
The provider might be accepting Accepts: Medicare and Medicaid. Please consult your insurance carrier or call the provider to verify.
