Doctor profile · Federal record
Dr. Mark Williams, PMHNP-BC
Psychiatric/Mental Health Nurse Practitioner (CMS: Nurse Practitioner) · Psychiatric/Mental Health Nurse Practitioner · Mesa, AZ
- NPI 1023786225
- Accepts Medicare
- 5 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
2120 W Guadalupe RD Ste 6
Mesa, AZ 852027366
(602) 230-7373
fax (480) 628-8577 - Additional location
-
3033 N Central Ave Ste 700
Phoenix, AZ 850122806
fax (602) 257-8029 - Mailing address
-
3101 N Central Ave Ste 550
Phoenix, AZ 850122635
Credentials & registration
- NPI registered
- September 2021 — 5 yrs on file
- Profile last updated
- December 12, 2025
- Year of graduation
- 2021 — 5 yrs since
- Specialty taxonomy
- 363LP0808X — NUCC code
- State licenses (2)
- Arizona #AP-263407 · Arizona #RNP263407
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1023786225. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
50
Distinct HCPCS
1
Medicare allowed
$4,264
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 50 | 14 | $85 |
In context: peer comparison
Among 15 peers in Mesa Psychiatric/Mental Health Nurse Practitioner, average services per provider: 74. This provider delivers 0.7× the peer median.Open Payments
Industry payments received
All-time total
$574
Transactions
24
Manufacturers
11
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Iti, INC. (D/B/A Intra-Cellular Therapies, INC.) | 6 | $110.92 | |
| Otsuka America Pharmaceutical, INC. | 1 | $99.13 | |
| Abbvie INC. | 5 | $97.55 | |
| Janssen Pharmaceuticals, INC | 3 | $85.81 | |
| Lundbeck LLC | 2 | $52.34 | |
| Vanda Pharmaceuticals INC. | 2 | $34.50 | |
| Almatica Pharma LLC | 1 | $20.96 | |
| Medline Industries Lp | 1 | $19.86 | |
| Teva Pharmaceuticals USA, INC. | 1 | $19.23 | |
| Braeburn INC. | 1 | $18.22 | |
| Idorsia Pharmaceuticals US INC | 1 | $15.08 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
935
Patients
138
Total drug cost
$18,982
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Quetiapine Fumarate | Generic | 129 | 22 | $1,573 |
| Trazodone Hcl | Generic | 93 | 24 | $891 |
| Aripiprazole | Generic | 73 | 15 | $3,114 |
| Alprazolam | Generic | 72 | 0 | $235 |
| Sertraline Hcl | Generic | 65 | 13 | $527 |
| Clonazepam | Generic | 64 | 12 | $700 |
| Lamotrigine | Generic | 61 | 16 | $675 |
| Gabapentin | Generic | 58 | 0 | $1,116 |
| Fluoxetine Hcl | Generic | 52 | 12 | $825 |
| Buspirone Hcl | Generic | 48 | 12 | $1,297 |
Frequently asked questions
What is Dr. Mark Williams's medical specialty?
Dr. Mark Williams practices Psychiatric/Mental Health Nurse Practitioner in Mesa, AZ.
Where does Dr. Mark Williams practice?
Dr. Mark Williams practices at 2120 W Guadalupe RD Ste 6, Mesa, AZ 852027366. Office phone: 6022307373.
What is Dr. Mark Williams's NPI?
Dr. Mark Williams's National Provider Identifier (NPI) is 1023786225, 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). Source: CMS Medicare Physician & Other Practitioners file.