DR. MARK WILLIAMS MD
NPI 1770558702
Internal Medicine - Nephrology in Winter Park, FL
NPI Status: Active since February 22, 2006
Contact Information
3727 N GOLDENROD RD STE 105
WINTER PARK, FL
ZIP 32792
Phone: (407) 657-0296
- Individual
- Male
- Internal Medicine
- Nephrology
- Accepts Insurance
- PECOS Enrolled
About MARK WILLIAMS
This page provides the complete NPI Profile along with additional information for Mark Williams, an internist established in Winter Park, Florida with a medical specialization in Internal Medicine, focusing in nephrology . The healthcare provider is registered in the NPI registry with number 1770558702 assigned on February 2006. The practitioner's primary taxonomy code is 207RN0300X with license number ME54570 (FL). The provider is registered as an individual and his NPI record was last updated 4 years ago.
- NPI
- 1770558702
- Provider Name
- DR. MARK WILLIAMS MD
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 3727 N GOLDENROD RD STE 105 WINTER PARK, FL 32792
- Location Phone
- (407) 657-0296
- Mailing Address
- 3885 OAKWATER CIR ORLANDO, FL 32806
- Mailing Phone
- (407) 816-5700
- Mailing Fax
- Is Sole Proprietor?
- No
- Enumeration Date
- 02-22-2006
- Last Update Date
- 11-07-2022
- Code Navigator
An internist like Mark Williams 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
Secondary Locations
- 3885 Oakwater Cir
Orlando, FL 32806
(407) 816-5700
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 Nephrology
- Taxonomy Code
- 207RN0300X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- ME54570
- License State
- FL
- Taxonomy Description
- An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.
Insurance Plans Accepted
According to publicly available information the provider might be accepting the following health plans from these health insurance companies:
- Complete VALUE Gold - HMO
- Focused VALUE Silver - HMO
- Focused VALUE Silver + Vision + Adult Dental - HMO
- Standard Gold VALUE - HMO
- Standard Silver VALUE - HMO
- Standard Silver VALUE + Vision + Adult Dental - HMO
- Clarity Silver - HMO
- Clarity VALUE Silver - HMO
- Complete Gold - HMO
- Complete Gold + Vision + Adult Dental - HMO
- Complete VALUE Gold - HMO
- Elite Bronze - HMO
- Elite Bronze + Vision + Adult Dental - HMO
- Elite VALUE Bronze - HMO
- Enhanced Diabetes Care Silver with $0 Drug Options - HMO
- Enhanced Diabetes Care Silver with $0 Drug Options + Vision + Adult Dental - HMO
- Complete Gold - EPO
- Complete Gold + Vision + Adult Dental - EPO
- Elite Bronze - EPO
- Elite Bronze + Vision + Adult Dental - EPO
- Elite Gold - EPO
- Elite Gold + Vision + Adult Dental - EPO
- Enhanced Diabetes Care Silver with $0 Drug Options - EPO
- Enhanced Diabetes Care Silver with $0 Drug Options + Vision + Adult Dental - EPO
- Everyday Bronze - EPO
- Everyday Bronze + Vision + Adult Dental - EPO
- AvMed Entrust Bronze 600 (2026) - HMO
- AvMed Entrust Bronze 650 (2026) - HMO
- AvMed Entrust Expanded Bronze Standard (2026) - HMO
- AvMed Entrust Gold 125 (2026) - HMO
- AvMed Entrust Gold 125 Dental+Vision (2026) - HMO
- AvMed Entrust Gold Standard (2026) - HMO
- AvMed Entrust Platinum 25 (2026) - HMO
- AvMed Entrust Platinum 25 Dental+Vision (2026) - HMO
- AvMed Entrust Platinum Standard (2026) - HMO
- AvMed Entrust Silver 350 (2026) - HMO
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.
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 |
|---|---|---|---|
| 0624921 | OTHER (01) | FL | AETNA |
| 061510200 | MEDICAID (05) | FL | |
| 08545 | OTHER (01) | FL | BC/BS |
| 3100042 | OTHER (01) | FL | UNITED HEALTHCARE |
Medicare Participation & PECOS Enrollment Status
Mark Williams 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.
Unknown
Treatment-Treatment - Miscellaneous (RX029N)
Tacrolimus, immediate release, oral, 1 mg (HCPCS:J7507)
2 DME suppliers used 22 Medicare Claims 2070 Services Paid
Treatment-Treatment - Miscellaneous (RX029N)
Mycophenolic acid, oral, 180 mg (HCPCS:J7518)
1 DME suppliers used 14 Medicare Claims 2400 Services Paid
Treatment-Chemotherapy (RH012N)
Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for a subsequent prescription in a 30-day period (HCPCS:Q0512)
3 DME suppliers used 23 Medicare Claims 25 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.
Blood test, comprehensive group of blood chemicals
Blood test, lipids (cholesterol and triglycerides)
Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count
Creatine kinase (cardiac enzyme) level, total
Creatinine level to test for kidney function or muscle injury
Dialysis procedure including 1 evaluation
Dialysis services, 2-3 physician visits per month (20 years or older)
Dialysis services, 4 or more physician visits per month (20 years or older)
Established patient office or other outpatient visit, 30-39 minutes
Established patient office or other outpatient visit, 40-54 minutes
Ferritin (blood protein) level
Follow-up hospital inpatient care per day, typically 25 minutes
Follow-up hospital inpatient care per day, typically 35 minutes
Hemodialysis procedure with physician evaluation
Hemoglobin a1c level
Initial hospital inpatient care per day, typically 70 minutes
Insertion of needle into vein for collection of blood sample
Iron binding capacity
Iron level
New patient office or other outpatient visit, 60-74 minutes
Parathormone (parathyroid hormone) level
Phosphate level
Telephone medical discussion with physician, 21-30 minutes
Total protein level, urine
Uric acid level, blood
Vitamin d-3 level
A comprehensive group of blood chemicals test, also known as a comprehensive metabolic panel, is a blood test that measures your sugar level, electrolyte and fluid balance, kidney function, and liver function. This helps to check your body's overall health.
This service was performed 209 times for 107 patientsA lipid panel is a blood test that measures fats and fatty substances, such as cholesterol and triglycerides. These substances are used by your body as a source of energy. High levels can lead to health issues, including heart disease.
This service was performed 22 times for 15 patientsA Complete Blood Cell Count is a common test that measures various components of the blood, including red cells (carry oxygen), white cells (fight infection), and platelets (help blood clot). An automated test ensures accuracy. The differential count provides detailed information about white cell types.
This service was performed 205 times for 107 patientsThe total Creatine Kinase (CK) level test is a blood test that helps assess the health of your heart. It measures an enzyme called CK that's released into the bloodstream when heart or other muscle tissue is damaged. High levels may indicate a heart attack or muscle disorder.
This service was performed 13 times for 13 patientsA creatinine level test measures the amount of creatinine in your blood. This substance is a waste product from normal muscle use. Higher levels can indicate possible kidney dysfunction or muscle injury. This test helps monitor kidney health.
This service was performed 191 times for 101 patientsDialysis is a treatment that filters and purifies the blood when your kidneys can't do their job. The procedure involves circulating your blood through a machine that removes waste products. An evaluation is done beforehand to assess your health and determine the best approach for your treatment.
This service was performed 109 times for 24 patientsDialysis is a treatment that performs the function of healthy kidneys if they're not working properly. It removes waste and excess fluid from your blood. 2-3 physician visits per month are recommended for monitoring your health and adjusting your treatment as needed. This service is available for those aged 20 years and older.
This service was performed 41 times for 26 patientsDialysis is a treatment that filters and purifies your blood using a machine. It helps keep your fluids and electrolytes in balance when the kidneys can't do their job. This service includes 4 or more visits per month with a physician to monitor your health and adjust your treatment as needed.
This service was performed 192 times for 39 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 428 times for 220 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 Ferritin level test measures the amount of ferritin, a protein that stores iron, in your blood. It helps determine how much iron your body is storing. If levels are low, it may indicate iron deficiency, while high levels could signify conditions like iron overload.
This service was performed 79 times for 56 patientsFollow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
This service was performed 336 times for 130 patientsFollow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
This service was performed 1,015 times for 363 patientsHemodialysis is a treatment that uses a machine to filter waste and excess fluid from your blood when your kidneys can't. A physician checks your health before, during, and after the procedure to ensure it's working effectively for you.
This service was performed 409 times for 120 patientsHemoglobin A1c (HbA1c) is a test that measures your average blood sugar level over the past 2-3 months. It's used to monitor how well diabetes is being controlled. High levels may indicate that your diabetes treatment plan needs adjustment.
This service was performed 94 times for 56 patientsInitial 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 218 times for 182 patientsThis procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.
This service was performed 264 times for 117 patientsIron binding capacity is a blood test that measures how well your body can bind and transport iron. This helps your healthcare provider assess if your body has too little or too much iron, which can indicate certain health conditions.
This service was performed 79 times for 56 patientsAn iron level test measures the amount of iron in your blood. Iron is crucial for producing hemoglobin, a protein in red blood cells that carries oxygen throughout your body. This test helps identify iron deficiencies or excesses, which can lead to conditions like anemia or hemochromatosis.
This service was performed 79 times for 56 patientsThis is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.
This service was performed 29 times for 29 patientsThe Parathormone level test measures the amount of parathyroid hormone in your blood. This hormone controls calcium and phosphorus levels in the body, which are vital for bone health. Abnormal levels may indicate issues like kidney disease or parathyroid gland disorders.
This service was performed 48 times for 38 patientsA phosphate level test measures the amount of phosphate in your blood. Phosphate is a chemical that contains the mineral phosphorus, crucial for energy production, muscle and nerve function, and bone growth. Imbalances may indicate kidney disease or other health issues.
This service was performed 39 times for 25 patientsThis service involves a 21-30 minute phone conversation with a physician. It's a chance for you to discuss your health concerns, symptoms or treatment plans. It's similar to an in-person consultation, but conducted over the phone for your convenience and safety.
This service was performed 97 times for 59 patientsThe Total Protein Level in urine test measures the amount of protein present in your urine. This helps to check kidney health as high levels may indicate a problem. It's a simple, non-invasive procedure involving a urine sample.
This service was performed 190 times for 101 patientsA blood uric acid level test measures the amount of uric acid in your blood. Uric acid is a waste product that your body produces when it breaks down purines, substances found in your body and in certain foods. High levels may lead to gout or kidney stones.
This service was performed 169 times for 95 patientsA Vitamin D-3 level test measures the amount of Vitamin D-3, a crucial nutrient, in your body. This test helps identify if your levels are too low or too high. Low levels may lead to bone weakness, while high levels could harm your kidneys. It's a simple blood test.
This service was performed 29 times for 22 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 32792 ZIP code area.
New Patients Visit Costs *
The most utilized procedure code for new patients office visits is 99204
- Average New Patient Price $130.04
- Minimum New Patient Price $56
- Maximum New Patient Price $171.84
- Average New Patient Copayment $32.51
- Minimum New Patient Copayment $14
- Maximum New Patient Copayment $42.96
Established Patients Visit Costs *
The most utilized procedure code for established patients office visits is 99214
- Average Established Patient Price $99.16
- Minimum Established Patient Price $17.57
- Maximum Established Patient Price $139.16
- Average Established Patient Copayment $24.79
- Minimum Established Patient Copayment $4.39
- Maximum Established Patient Copayment $34.79
* 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 1770558702, we treat the final digit (2) 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 58. The final step is to find the difference between that total and the next multiple of ten (60 - 58 = 2).
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 58 is 60. 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.
WINTER PARK, FL 32792
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1770558702, enumerated as an "individual" on February 22, 2006.
The provider is located at 3727 N GOLDENROD RD STE 105 WINTER PARK, FL 32792 and the phone number is (407) 657-0296.
Internal Medicine with taxonomy code 207RN0300X and a focus in Nephrology.
The provider might be accepting Accepts: Ambetter from Superior HealthPlan, Ambetter. Please consult your insurance carrier or call the provider to verify.