Doctor profile · Federal record
Dr. Mark Williams, M.D.
Anesthesiology Physician (CMS: Anesthesiology) · Pain Medicine (Anesthesiology) Physician · Longview, TX
- NPI 1174590947
- Accepts Medicare
- MIPS 92.1 / 100 · 2023
- 40 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
2901 N. 4Th St.
Longview, TX 756055128
(903) 247-2050
fax (903) 934-8280 - Mailing address
-
Po Box 614
Longview, TX 756060614
Credentials & registration
- NPI registered
- March 2006 — 20 yrs on file
- Profile last updated
- January 31, 2023
- Year of graduation
- 1986 — 40 yrs since
- Specialty taxonomy
- 207L00000X — NUCC code
- State license (1)
- Texas #H3845
- Medicaid
- TX #138869601
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1174590947. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
500
Distinct HCPCS
10
Medicare allowed
$38,647
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
00812 |
Anesthesia for exam of colon using an endoscope | 75 | 73 | $50 | |
00731 |
Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope | 63 | 63 | $64 | |
00142 |
Anesthesia for lens surgery | 59 | 53 | $55 | |
01938 |
Anesthesia for injection, drainage or aspiration procedures on spine or spinal cord of lower back accessed through skin using imaging guidance | 55 | 51 | $50 | |
00811 |
Anesthesia for other procedure on large bowel using an endoscope | 39 | 38 | $62 | |
00813 |
Anesthesia for procedure on small and large bowel using an endoscope | 30 | 30 | $74 | |
01992 |
Anesthesia for nerve block and injection procedure, prone position | 22 | 21 | $58 | |
01810 |
Anesthesia for procedure on nerves, muscles, tendons, and tissue of forearm, wrist, and hand | 19 | 19 | $66 | |
01402 |
Anesthesia for procedure for total knee joint replacement | 17 | 17 | $143 | |
00400 |
Anesthesia for other procedure on skin of arms, legs, and front body | 16 | 15 | $77 |
In context: peer comparison
Among 5 peers in Longview Anesthesiology Physician, average services per provider: 26. This provider delivers 19× the peer median.Open Payments
Industry payments received
All-time total
$17
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Janssen Pharmaceuticals, INC | 1 | $16.72 |
By nature of payment
Hospital affiliations
Frequently asked questions
What is Dr. Mark Williams's medical specialty?
Dr. Mark Williams practices Anesthesiology Physician in Longview, TX.
Where does Dr. Mark Williams practice?
Dr. Mark Williams practices at 2901 N. 4Th St., Longview, TX 756055128. Office phone: 9032472050.
What is Dr. Mark Williams's NPI?
Dr. Mark Williams's National Provider Identifier (NPI) is 1174590947, 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: Anesthesia for exam of colon using an endoscope (HCPCS 00812); Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (HCPCS 00731); Anesthesia for lens surgery (HCPCS 00142). Source: CMS Medicare Physician & Other Practitioners file.