Doctor profile · Federal record
Dr. Mark Williams, MBBS
Anesthesiology Physician (CMS: Anesthesiology) · Medical Physician Assistant · Student in an Organized Health Care Education/Training Program · Rochester, NY
- NPI 1295178242
- Accepts Medicare
- MIPS 68.0 / 100 · 2023
- 19 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
University of Rochester Medical Ctr, 601 Elmwood Ave, Box 604
Rochester, NY 146420001
(585) 275-1384 - Mailing address
-
601 Elmwood Ave Box 604
Rochester, NY 146420001
Credentials & registration
- NPI registered
- April 2013 — 13 yrs on file
- Profile last updated
- July 7, 2023
- Year of graduation
- 2007 — 19 yrs since
- Specialty taxonomy
- 207L00000X — NUCC code
- State license (1)
- New York #286923
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1295178242. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
157
Distinct HCPCS
3
Medicare allowed
$15,974
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 104 | 80 | $96 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 41 | 41 | $128 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 12 | 11 | $60 |
In context: peer comparison
Among 59 peers in Rochester Anesthesiology Physician, average services per provider: 29. This provider delivers 5.4× the peer median.Open Payments
Industry payments received
All-time total
$714
Transactions
24
Manufacturers
4
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Abbott Laboratories | 10 | $393.14 | |
| Spr Therapeutics, INC | 11 | $155.86 | |
| Vertos Medical, INC. | 2 | $110.24 | |
| Nevro Corp. | 1 | $54.96 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
17
Patients
0
Total drug cost
$337
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Gabapentin | Generic | 17 | 0 | $337 |
Frequently asked questions
What is Dr. Mark Williams's medical specialty?
Dr. Mark Williams practices Anesthesiology Physician in Rochester, NY.
Where does Dr. Mark Williams practice?
Dr. Mark Williams practices at University of Rochester Medical Ctr, Rochester, NY 146420001. Office phone: 5852751384.
What is Dr. Mark Williams's NPI?
Dr. Mark Williams's National Provider Identifier (NPI) is 1295178242, 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: Established patient office or other outpatient visit (HCPCS 99214); New patient office or other outpatient visit (HCPCS 99204); Established patient office or other outpatient visit (HCPCS 99213). Source: CMS Medicare Physician & Other Practitioners file.