TIMOTHY ALPHONZO WILLIAMS M.D.
NPI 1023335312
Internal Medicine - Nephrology in Birmingham, AL

Q: What is Timothy Williams's NPI number?

The NPI number for Timothy Williams is 1023335312. It was assigned to this individual provider in the NPPES registry on April 26, 2010.

Q: What is Timothy Williams's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Timothy Williams was last updated on October 31, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.

Active since April 26, 2010PECOS EnrolledAccepts Medicare Assignment

30/100

CMS Quality Rating

35 W LAKESHORE DR STE 200, BIRMINGHAM, AL 35209(205) 226-5900(205) 226-5937 Get Directions Write a Review

NPPES record last updated: October 31, 2018. Verified against the NPPES registry weekly; last sync: October 18, 2026.

On this page

About Timothy Alphonzo Williams M.d. NPPES

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

TIMOTHY ALPHONZO WILLIAMS M.D. (NPI 1023335312) is an individual nephrology provider in Birmingham, Alabama, licensed in Alabama (31432) and active in the NPI registry since April 2010. He is enrolled in Medicare PECOS and is a graduate of University Of Alabama School Of Medicine (2010).

NPPES Registry Identity

NPI1023335312

Entity TypeIndividualMale

Primary Taxonomy207RN0300X

Provider Legal NameTIMOTHY ALPHONZO WILLIAMSCredential: M.D.

Location Address35 W LAKESHORE DR STE 200Birmingham, AL 35209-7250

Mailing Address817 Princeton Ave Sw, Pob Ii; Suite 210Birmingham, AL 35211-1333 · (205) 788-7572 · Fax (205) 226-5938

Phone(205) 226-5900

Fax(205) 226-5937

Sole ProprietorNo

Medical School CMSUniversity Of Alabama School Of MedicineGraduated 2010

Enumeration DateApril 26, 2010

Last NPPES UpdateOctober 31, 2018

✔ NPI 1023335312 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 AL · 31432

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.

35 W LAKESHORE DR STE 200, Birmingham, AL 35209

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Accepted Insurance

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

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Timothy Alphonzo Williams M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID1658518410

PECOS Enrollment IDI20150723008091

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.

Medicare Billing Reassignments

Medicare enrollment records show Timothy Williams reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Fresenius Vascular Care Birmingham Mso LLC

0.1 mi

Multi-Specialty

1280 COLUMBIANA RD STE 120
Vestavia Hills, AL 35216

Reassigned Medicare billing, Alabama enrollment
5 clinicians in this Medicare group

NPI 1710766829 (205) 916-5201

Nephrology Associates, PC

2.1 mi

Nephrology

1770 INDEPENDENCE CT
Vestavia Hills, AL 35216

Reassigned Medicare billing, Alabama enrollment
32 clinicians in this Medicare group

NPI 1023030152 (205) 226-5900

Cahaba Medical Care Foundation

39 mi

Multi-Specialty

294 PIERSON AVENUE
Centreville, AL 35042

Reassigned Medicare billing, Alabama enrollment
217 clinicians in this Medicare group

NPI 1093058133 (205) 926-2992

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 14

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-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.

386 services146 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This 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.

182 services124 patients

Dialysis services, 4 or more physician visits per month (20 years or older) 90960

Dialysis 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.

73 services11 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233

Follow-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.

48 services27 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial 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.

47 services47 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This 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.

34 services34 patients

Automated urinalysis test 81003

An automated urinalysis test is a routine examination that checks your urine for various substances. It can help identify potential health issues such as kidney problems or diabetes. The test uses a machine to analyze a small urine sample, providing quick and accurate results.

27 services27 patients

Dialysis procedure including 1 evaluation 90945

Dialysis 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.

26 services13 patients

Hemodialysis procedure with physician evaluation 90935

Hemodialysis 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.

25 services23 patients

Insertion of needle into vein for collection of blood sample 36415

This 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.

22 services17 patients

Insertion of needle and/or tube into hemodialysis circuit and balloon dilation of dialysis segment with review by radiologist 36902

This procedure involves inserting a needle or tube into your hemodialysis circuit, a system that cleans your blood when your kidneys can't. A balloon is then used to widen a narrow section of this circuit. A radiologist reviews the procedure to ensure accuracy.

20 services19 patients

Insertion of needle and/or tube into hemodialysis circuit with review by radiologist 36901

This procedure involves inserting a needle or tube into your hemodialysis circuit, which is part of the system that cleans your blood when your kidneys can't. A radiologist, a doctor specialized in imaging techniques, will review the process to ensure everything is correct.

17 services16 patients

Fluoroscopic guidance for insertion or removal of central vein access device 77001

Fluoroscopic guidance for central vein access device insertion or removal is a procedure where a special X-ray, called a fluoroscope, is used to help accurately place or remove a device in a central vein. This device aids in delivering medications or collecting blood samples.

12 services12 patients

Removal and/or dissolving of blood clot in hemodialysis circuit and balloon dilation of dialysis segment with imaging review by radiologist, with balloon tube 36905

This procedure involves eliminating a blood clot in your hemodialysis circuit, ensuring smooth blood flow. A balloon tube is used to widen the dialysis segment if needed. Images are taken and reviewed by a radiologist to confirm successful completion.

11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 35209 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

$122.31 typical visit price

range $52.65 – $161.63

Typical copayment $30.57 (range $13.16 – $40.40)

Most-billed visit code 99204

Established Patient

$93.72 typical visit price

range $16.56 – $131.65

Typical copayment $23.43 (range $4.14 – $32.91)

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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

30/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Individually scored

Quality

Promoting Interoperability

Improvement Activities

Cost

100

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 Timothy Williams's NPI number?

The NPI number for Timothy Williams is 1023335312. It was assigned to this individual provider in the NPPES registry on April 26, 2010.

Where is Timothy Williams located?

Timothy Williams practices at 35 W Lakeshore Dr Ste 200, Birmingham, AL 35209. The listed phone number is (205) 226-5900.

What is Timothy Williams's specialty?

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

Is Timothy Williams enrolled in Medicare?

Yes. Timothy Williams is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Timothy Williams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Timothy Williams reassigns Medicare benefits to 3 organizations: Fresenius Vascular Care Birmingham Mso LLC (Vestavia Hills, AL), Nephrology Associates, PC (Vestavia Hills, AL) and Cahaba Medical Care Foundation (Centreville, AL). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Timothy Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Timothy Williams accept?

Health plans from Ambetter Health, Ambetter of Alabama, Ambetter of Tennessee, Blue Cross and Blue Shield of Alabama and Oscar Insurance Company and 1 other insurer list Timothy 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 Timothy Williams was last updated on October 31, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.