Doctor profile · Federal record
Dr. Mark Williams, MD
Anesthesiology Physician (CMS: Anesthesiology) · Phoenix, AZ
- NPI 1679505440
- Accepts Medicare
- 40 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
250 E Dunlap Ave
Phoenix, AZ 85020
(602) 273-9333
fax (480) 609-9350 - Mailing address
-
Po Box 13385
Scottsdale, AZ 852673385
Credentials & registration
- NPI registered
- July 2006 — 20 yrs on file
- Profile last updated
- May 16, 2008
- Year of graduation
- 1986 — 40 yrs since
- Specialty taxonomy
- 207L00000X — NUCC code
- State license (1)
- Arizona #22063
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1679505440. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
48
Distinct HCPCS
2
Medicare allowed
$21,158
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
36620 |
Insertion of artery tube for blood sampling or infusion through skin | 25 | 24 | $43 | |
00670 |
Anesthesia for extensive surgery on spine | 23 | 22 | $873 |
In context: peer comparison
Among 166 peers in Phoenix Anesthesiology Physician, average services per provider: 34. This provider delivers 1.4× the peer median.Frequently asked questions
What is Dr. Mark Williams's medical specialty?
Dr. Mark Williams practices Anesthesiology Physician in Phoenix, AZ.
Where does Dr. Mark Williams practice?
Dr. Mark Williams practices at 250 E Dunlap Ave, Phoenix, AZ 85020. Office phone: 6022739333.
What is Dr. Mark Williams's NPI?
Dr. Mark Williams's National Provider Identifier (NPI) is 1679505440, 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: Insertion of artery tube for blood sampling or infusion through skin (HCPCS 36620); Anesthesia for extensive surgery on spine (HCPCS 00670). Source: CMS Medicare Physician & Other Practitioners file.