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DR. MARK WILLIAMS MD
NPI 1770558702
Internal Medicine - Nephrology in Winter Park, FL

Active since February 22, 2006PECOS Enrolled
3727 N GOLDENROD RD STE 105, WINTER PARK, FL 32792(407) 657-0296 Get Directions Write a Review

NPPES record last updated: November 7, 2022. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Dr. Mark Williams Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. MARK WILLIAMS MD (NPI 1770558702) is an individual nephrology provider in Winter Park, Florida, licensed in Florida (ME54570) and active in the NPI registry since February 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1770558702
Entity TypeIndividualMale
Primary Taxonomy207RN0300X
Provider Legal NameDR. MARK WILLIAMSCredential: MD
Location Address3727 N GOLDENROD RD STE 105Winter Park, FL 32792-8611
Mailing Address3885 Oakwater CirOrlando, FL 32806-6257 · (407) 816-5700 · Fax (407) 812-6766
Phone(407) 657-0296
Sole ProprietorNo
Enumeration DateFebruary 22, 2006
Last NPPES UpdateNovember 7, 2022
NPPES CertifiedNovember 7, 2022
✔ NPI 1770558702 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians
Taxonomy Code207RN0300X
License✔ Licensed in FL · ME54570
Definition
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.
3727 N GOLDENROD RD STE 105, Winter Park, FL 32792
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Other Identifiers 4

Other0624921FL · Aetna
Medicaid061510200FL
Other08545FL · Bc/bs
Other3100042FL · United Healthcare

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Superior HealthPlan, Ambetter Health, Ambetter of Alabama and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Mark Williams Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 32792 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$130.04 typical visit price
range $56.00 – $171.84
Typical copayment $32.51 (range $14.00 – $42.96)
Most-billed visit code 99204
Established Patient
$99.16 typical visit price
range $17.57 – $139.16
Typical copayment $24.79 (range $4.39 – $34.79)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims 3

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Tacrolimus, immediate release, oral, 1 mg J7507
Treatment-Treatment - Miscellaneous · category RX029N
2 suppliers22 claims2,070 services$0.30 avg. paid by Medicare
Mycophenolic acid, oral, 180 mg J7518
Treatment-Treatment - Miscellaneous · category RX029N
1 supplier14 claims2,400 services$0.95 avg. paid by Medicare
Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for a subsequent prescription in a 30-day period Q0512
Treatment-Chemotherapy · category RH012N
3 suppliers23 claims25 services$12.64 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. CHIDAMBARAM SUNDER VALLIAPPAN M.D.
Internal Medicine (Nephrology)
3727 N GOLDENROD RD STE 105
WINTER PARK, FL 32792
Orange County (407) 657-0296

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Mark Williams's NPI number?

The NPI number for Mark Williams is 1770558702. It was assigned to this individual provider in the NPPES registry on February 22, 2006.

Where is Mark Williams located?

Mark Williams practices at 3727 N Goldenrod Rd Ste 105, Winter Park, FL 32792. The listed phone number is (407) 657-0296.

What is Mark Williams's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Is Mark Williams enrolled in Medicare?

Yes. Mark Williams is registered in the Medicare PECOS enrollment system.

What insurance does Mark Williams accept?

Health plans from Ambetter Health, Ambetter from Superior HealthPlan, Ambetter of Alabama and AvMed list Mark Williams as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Mark Williams was last updated on November 7, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.