1. Home
  2. Directory
  3. Michigan
  4. Southfield
  5. Internal Medicine
  6. NPI Profile

DR. ANTHONY DWAYNE WILLIAMS M.D.
NPI 1245246354
Internal Medicine - Gastroenterology in Southfield, MI

Active since July 31, 2006PECOS EnrolledAccepts Medicare Assignment
23077 GREENFIELD RD, STE 231, SOUTHFIELD, MI 48075(248) 569-2160(248) 569-5756 Get Directions Write a Review

NPPES record last updated: October 27, 2023. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Anthony Dwayne Williams M.d. NPPES

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

DR. ANTHONY DWAYNE WILLIAMS M.D. (NPI 1245246354) is an individual gastroenterology provider in Southfield, Michigan, licensed in Michigan (4301062274) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, is affiliated with Henry Ford Health Hospital, and maintains a secondary practice location in Portage.

NPPES Registry Identity

NPI1245246354
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameDR. ANTHONY DWAYNE WILLIAMSCredential: M.D.
Location Address23077 GREENFIELD RD, STE 231Southfield, MI 48075-3709
Mailing Address23077 Greenfield Rd, Ste 231Southfield, MI 48075-3709 · (248) 569-2160 · Fax (248) 569-4875
Phone(248) 569-2160
Fax(248) 569-5756
Sole ProprietorYes
Medical School CMSWayne State University School Of MedicineGraduated 1993
Enumeration DateJuly 31, 2006
Last NPPES UpdateOctober 27, 2023
NPPES CertifiedOctober 27, 2023
✔ NPI 1245246354 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
License✔ Licensed in MI · 4301062274
Definition
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
23077 GREENFIELD RD, Southfield, MI 48075
Open in Google Maps ↗

Secondary Practice Location 1

Location 13304 Cooley CtPortage, MI 49024-7430 · Phone (269) 349-2266

Other Identifiers 2

Other0N16240MI · Medicare Ptan
Medicaid4221369MI

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Buckeye Health Plan, Ambetter from Meridian, Ambetter Health 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

Dr. Anthony Dwayne 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 ID5395830699
PECOS Enrollment IDI20071002000261
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

5

Medicare enrollment records show Anthony Williams reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Vhs Physicians Of Michigan
5.3 mi
Internal Medicine
29201 TELEGRAPH RD STE 404N
Southfield, MI 48034
  • Reassigned Medicare billing, Michigan enrollment
  • 407 clinicians in this Medicare group
NPI 1073827101 (248) 450-3507
Henry Ford Wyandotte Hospital
17 mi
Surgery
2070 BIDDLE AVE, SUITE 200
Wyandotte, MI 48192
  • Reassigned Medicare billing, Michigan enrollment
  • 157 clinicians in this Medicare group
NPI 1699102244 (734) 225-9100
W.A. Foote Memorial Hospital
53 mi
Urology
205 N. EAST AVE, ATTN: PROVIDER ENROLLMENT
Jackson, MI 49201
  • Reassigned Medicare billing, Michigan enrollment
  • 474 clinicians in this Medicare group
NPI 1073051199 (517) 841-7843
Ella E M Brown Charitable Circle
85 mi
Medical
420 S HILLSDALE ST
Homer, MI 49245
  • Reassigned Medicare billing, Michigan enrollment
  • 168 clinicians in this Medicare group
NPI 1518159169 (517) 568-4481
Bronson Methodist Hospital
122 mi
Hospitalist
601 JOHN STREET
Kalamazoo, MI 49007
  • Reassigned Medicare billing, Michigan enrollment
  • 1,133 clinicians in this Medicare group
NPI 1417961137 (269) 341-7654

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 10

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.

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.
48 services48 patients
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239
This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.
34 services34 patients
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203
This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.
32 services32 patients
Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk G0121
Colorectal cancer screening, such as a colonoscopy, is a preventive measure to detect early signs of cancer in the large intestine. For individuals not at high risk, it's typically recommended at age 50. A small, flexible tube with a camera is used to examine your colon. It's a safe, effective way to catch issues early.
32 services32 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.
21 services18 patients
Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43235
This procedure, known as an upper endoscopy, involves inserting a thin, flexible tube with a camera down the throat to examine the esophagus, stomach, and upper small bowel. It helps diagnose conditions like ulcers or inflammation.
19 services19 patients

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Henry Ford Health Hospital

Acute Care Hospitals · Detroit, MI
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number230053
Location2799 W Grand BlvdDetroit, MI 48202 · Wayne County
Emergency services Birthing friendly

Henry Ford Health Wyandotte Hospital

Acute Care Hospitals · Wyandotte, MI
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number230146
Location2333 Biddle AveWyandotte, MI 48192 · Wayne County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 48075 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
$134.28 typical visit price
range $58.04 – $177.36
Typical copayment $33.57 (range $14.51 – $44.34)
Most-billed visit code 99204
Established Patient
$102.35 typical visit price
range $18.32 – $143.49
Typical copayment $25.58 (range $4.58 – $35.87)
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.

Reported Quality Measures

e-Prescribing
At least one permissible prescription written by the MIPS eligible clinician is queried for a drug formulary and transmitted electronically using certified EHR technology.
91%2,610 patients3/55-star benchmark: 99%
Medication Reconciliation
The MIPS eligible clinician performs medication reconciliation for at least one transition of care in which the patient is transitioned into the care of the MIPS eligible clinician.
100%609 patients5/55-star benchmark: 100%
Patient-Specific Education
The MIPS eligible clinician must use clinically relevant information from CEHRT to identify patient-specific educational resources and provide access to those materials to at least one unique patient seen by the MIPS eligible clinician.
54%1,196 patients3/55-star benchmark: 97%
Provide Patient Access
At least one patient seen by the MIPS eligible clinician during the performance period is provided timely access to view online, download, and transmit to a third party their health information subject to the MIPS eligible clinician's discretion to withhold…
96%1,196 patients4/55-star benchmark: 100%
Secure Messaging
For at least one unique patient seen by the MIPS eligible clinician during the performance period, a secure message was sent using the electronic messaging function of CEHRT to the patient (or the patient-authorized representative), or in response to a secure…
4%1,196 patients1/55-star benchmark: 89%
View, Download, or Transmit (VDT)
At least one patient seen by the MIPS eligible clinician during the performance period (or patient-authorized representative) views, downloads or transmits their health information to a third party during the performance period.
18%1,196 patients
Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Other Providers at the Same Location NPPES 20

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

MR. GASPER NOVARA LMSW
Social Worker (Clinical)
23077 GREENFIELD RD, #430
SOUTHFIELD, MI 48075
Oakland County (248) 552-0066
DR. MARTIN A TUMA MD
Surgery (Vascular Surgery)
23077 GREENFIELD RD, SUITE 110
SOUTHFIELD, MI 48075
Oakland County (947) 282-6304
RENAISSANCE ENDODONTICS, PLLC
Dentist (Endodontics)
23077 GREENFIELD RD, SUITE 285
SOUTHFIELD, MI 48075
Oakland County (248) 395-9800
HORSLEY FOOT AND ANKLE SURGEONS PLLC
Podiatrist (Foot & Ankle Surgery)
23077 GREENFIELD RD, STE 255
SOUTHFIELD, MI 48075
Oakland County (248) 599-5200
ROBINSON CHIROPRACTIC & PERSONAL FITNESS CENTER PC
Chiropractor
23077 GREENFIELD RD, SUITE 260
SOUTHFIELD, MI 48075
Oakland County (248) 443-5545
SAILAJA PEDDIREDDY MD
Internal Medicine
23077 GREENFIELD RD, SUITE 240
SOUTHFIELD, MI 48075
Oakland County (248) 809-6402
UNIVERSITY ALLERGY & ASTHMA CENTER PLLC
Allergy & Immunology
23077 GREENFIELD RD, SUITE 479
SOUTHFIELD, MI 48075
Oakland County (313) 891-1500
GREENFIELD MEDICAL ORTHOPEDIC PLLC
Clinic/Center (Primary Care)
23077 GREENFIELD RD, SUITE 159
SOUTHFIELD, MI 48075
Oakland County (248) 351-1111

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 Anthony Williams's NPI number?

The NPI number for Anthony Williams is 1245246354. It was assigned to this individual provider in the NPPES registry on July 31, 2006.

Where is Anthony Williams located?

Anthony Williams practices at 23077 Greenfield Rd Ste 231, Southfield, MI 48075. The listed phone number is (248) 569-2160.

What is Anthony Williams's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Anthony Williams enrolled in Medicare?

Yes. Anthony 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 Anthony Williams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Anthony Williams reassigns Medicare benefits to 5 organizations: Vhs Physicians Of Michigan (Southfield, MI), Henry Ford Wyandotte Hospital (Wyandotte, MI), W.A. Foote Memorial Hospital (Jackson, MI), Ella E M Brown Charitable Circle (Homer, MI) and Bronson Methodist Hospital (Kalamazoo, MI). 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 Anthony Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Anthony Williams accept?

Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Blue Care Network of Michigan and Blue Cross Blue Shield of Michigan Mutual Insurance Company and 1 other insurer list Anthony 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.

Is Anthony Williams affiliated with any hospitals?

According to CMS data, Anthony Williams is affiliated with Henry Ford Health Hospital and Henry Ford Health Wyandotte Hospital.

When was this NPI record last updated?

The NPPES record for Anthony Williams was last updated on October 27, 2023. 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.