Doctor profile · Federal record
Dr. Mark Williams, MD, PHD
Surgery Physician (CMS: General Surgery) · Surgery Physician · Muscatine, IA
- NPI 1417986001
- Accepts Medicare
- 26 yrs in practice
- Licensed in 2 states
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
1518 Mulberry Ave Ste 102
Muscatine, IA 527613433
(563) 264-4112
Credentials & registration
- NPI registered
- July 2006 — 20 yrs on file
- Profile last updated
- November 14, 2025
- Year of graduation
- 2000 — 26 yrs since
- Specialty taxonomy
- 208600000X — NUCC code
- State licenses (2)
- Iowa #49587 · South Carolina #TL25609
- Medicaid
- IL #036116745
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1417986001. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
19
Distinct HCPCS
1
Medicare allowed
$2,303
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 19 | 19 | $121 |
In context: peer comparison
Among 1 peers in Muscatine Surgery Physician, average services per provider: 19. This provider delivers 1.0× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
30
Patients
30
Total drug cost
$198
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) | Brand | 30 | 30 | $198 |
Frequently asked questions
What is Dr. Mark Williams's medical specialty?
Dr. Mark Williams practices Surgery Physician in Muscatine, IA.
Where does Dr. Mark Williams practice?
Dr. Mark Williams practices at 1518 Mulberry Ave Ste 102, Muscatine, IA 527613433. Office phone: 5632644112.
What is Dr. Mark Williams's NPI?
Dr. Mark Williams's National Provider Identifier (NPI) is 1417986001, issued by NPPES.
Does Dr. Mark Williams accept Medicare assignment?
Yes. Dr. Mark Williams accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Mark Williams commonly perform?
Top Medicare-reported procedures in 2023: Initial hospital care with straightforward or low-level medical decision making (HCPCS 99222). Source: CMS Medicare Physician & Other Practitioners file.