Doctor profile · Federal record
Dr. Anthony Williams, M.D.
Gastroenterology Physician (CMS: Gastroenterology) · Southfield, MI
- NPI 1245246354
- Accepts Medicare
- 33 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
23077 Greenfield RD, Ste 231
Southfield, MI 480753709
(248) 569-2160
fax (248) 569-5756 - Additional location
-
3304 Cooley CT
Portage, MI 490247430
(269) 349-2266
Credentials & registration
- NPI registered
- July 2006 — 20 yrs on file
- Profile last updated
- October 27, 2023
- Year of graduation
- 1993 — 33 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- Michigan #4301062274
- Medicaid
- MI #4221369
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1245246354. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
171
Distinct HCPCS
5
Medicare allowed
$19,201
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99212 |
Established patient office or other outpatient visit, 10-19 minutes | 48 | 37 | $57 | |
G0121 |
Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk | 42 | 42 | $189 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 29 | 29 | $113 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 27 | 26 | $89 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 25 | 25 | $112 |
In context: peer comparison
Among 7 peers in Southfield Gastroenterology Physician, average services per provider: 69. This provider delivers 2.5× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
2,248
Patients
744
Total drug cost
$130,187
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Pantoprazole Sodium | Generic | 340 | 81 | $7,835 |
| Sucralfate | Generic | 330 | 83 | $12,814 |
| Gavilyte-G (Peg3350/Sod Sulf,Bicarb,Cl/Kcl) | Brand | 301 | 280 | $5,025 |
| Omeprazole | Generic | 293 | 81 | $6,721 |
| Famotidine | Generic | 238 | 57 | $6,028 |
| Dicyclomine Hcl | Generic | 184 | 31 | $8,808 |
| Baclofen | Generic | 94 | 20 | $3,162 |
| Metoclopramide Hcl | Generic | 92 | 13 | $788 |
| Linzess (Linaclotide) | Brand | 71 | 15 | $45,188 |
| Loperamide (Loperamide Hcl) | Brand | 71 | 17 | $1,716 |
Frequently asked questions
What is Dr. Anthony Williams's medical specialty?
Dr. Anthony Williams practices Gastroenterology Physician in Southfield, MI.
Where does Dr. Anthony Williams practice?
Dr. Anthony Williams practices at 23077 Greenfield RD, Southfield, MI 480753709. Office phone: 2485692160.
What is Dr. Anthony Williams's NPI?
Dr. Anthony Williams's National Provider Identifier (NPI) is 1245246354, issued by NPPES.
Does Dr. Anthony Williams accept Medicare assignment?
Yes. Dr. Anthony Williams accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Anthony Williams commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99212); Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk (HCPCS G0121); New patient office or other outpatient visit (HCPCS 99203). Source: CMS Medicare Physician & Other Practitioners file.