Doctor profile · Federal record
Dr. William Marsteller, M.D.
Gastroenterology Physician (CMS: Gastroenterology) · Student in an Organized Health Care Education/Training Program · Charleston, SC
- NPI 1992917504
- Accepts Medicare
- MIPS 82.4 / 100 · 2023
- 20 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1962 Charlie Hall Blvd.
Charleston, SC 29414
(843) 722-8000
fax (843) 647-6066 - Mailing address
-
2001 2Nd Ave Ste 101
Summerville, SC 294867887
Credentials & registration
- NPI registered
- May 2007 — 19 yrs on file
- Profile last updated
- May 7, 2020
- Year of graduation
- 2006 — 20 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- South Carolina #32824
- Medicaid
- SC #GP0680
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1992917504. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,304
Distinct HCPCS
10
Medicare allowed
$169,122
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 337 | 263 | $118 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 226 | 226 | $92 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 181 | 172 | $82 | |
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 173 | 169 | $228 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 129 | 129 | $155 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 57 | 24 | $75 | |
43450 |
Dilation of esophagus | 43 | 43 | $37 | |
76705 |
Limited ultrasound scan of abdomen | 34 | 30 | $55 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 22 | 22 | $165 | |
74177 |
Ct scan of abdomen and pelvis with contrast | 21 | 21 | $210 |
In context: peer comparison
Among 10 peers in this city , average services per provider: 75. This provider delivers 17× the peer median.Open Payments
Industry payments received
All-time total
$189
Transactions
4
Manufacturers
4
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Madrigal Pharmaceuticals | 1 | $142.48 | |
| Intercept Pharmaceuticals, Inc. | 1 | $16.59 | |
| Sandoz Inc. | 1 | $15.33 | |
| Merck Sharp & Dohme LLC | 1 | $14.99 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
1,527
Patients
629
Total drug cost
$131,173
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Pantoprazole Sodium | Generic | 419 | 144 | $6,211 |
| Omeprazole | Generic | 268 | 94 | $4,289 |
| Famotidine | Generic | 185 | 64 | $2,991 |
| Sod Sulf-Potass Sulf-Mag Sulf (Sodium, Potassium,mag Sulfates) | Brand | 116 | 111 | $8,957 |
| Sucralfate | Generic | 59 | 28 | $2,988 |
| Dexlansoprazole Dr (Dexlansoprazole) | Brand | 58 | 12 | $20,262 |
| Linzess (Linaclotide) | Brand | 57 | 17 | $55,971 |
| Rabeprazole Sodium | Generic | 55 | 16 | $2,752 |
| Colestipol Hcl | Generic | 48 | 16 | $6,515 |
| Promethazine Hcl | Generic | 47 | 0 | $296 |
Hospital affiliations
Frequently asked questions
What is Dr. William Marsteller's medical specialty?
Dr. William Marsteller practices Gastroenterology Physician in Charleston, SC.
Where does Dr. William Marsteller practice?
Dr. William Marsteller practices at 1962 Charlie Hall Blvd., Charleston, SC 29414. Office phone: 8437228000.
What is Dr. William Marsteller's NPI?
Dr. William Marsteller's National Provider Identifier (NPI) is 1992917504, issued by NPPES.
Does Dr. William Marsteller accept Medicare assignment?
Yes. Dr. William Marsteller accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. William Marsteller commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Biopsy of large bowel using a flexible endoscope (HCPCS 45380); Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (HCPCS 43239). Source: CMS Medicare Physician & Other Practitioners file.