Doctor profile · Federal record
Dr. Maria Diaz, M.D.
Emergency Medicine Physician (CMS: Emergency Medicine) · Derry, NH
- NPI 1013142959
- Accepts Medicare
- 20 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1 Parkland Dr
Derry, NH 030382746
(603) 421-2220
fax (603) 421-2223 - Mailing address
-
380 Lafayette RD
Hampton, NH 038422222
Credentials & registration
- NPI registered
- May 2009 — 17 yrs on file
- Profile last updated
- December 3, 2012
- Year of graduation
- 2006 — 20 yrs since
- Specialty taxonomy
- 207P00000X — NUCC code
- State license (1)
- New Hampshire #LT3226
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1013142959. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
248
Distinct HCPCS
3
Medicare allowed
$31,267
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99284 |
Emergency department visit with moderate level of medical decision making | 120 | 114 | $115 | |
99285 |
Emergency department visit with high level of medical decision making | 87 | 81 | $168 | |
99283 |
Emergency department visit with low level of medical decision making | 41 | 40 | $68 |
In context: peer comparison
Among 4 peers in this city , average services per provider: 128. This provider delivers 1.9× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
25
Patients
25
Total drug cost
$164
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Oxycodone-Acetaminophen (Oxycodone Hcl/Acetaminophen) | Brand | 14 | 14 | $75 |
| Cephalexin | Generic | 11 | 11 | $89 |
Hospital affiliations
Frequently asked questions
What is Dr. Maria Diaz's medical specialty?
Dr. Maria Diaz practices Emergency Medicine Physician in Derry, NH.
Where does Dr. Maria Diaz practice?
Dr. Maria Diaz practices at 1 Parkland Dr, Derry, NH 030382746. Office phone: 6034212220.
What is Dr. Maria Diaz's NPI?
Dr. Maria Diaz's National Provider Identifier (NPI) is 1013142959, issued by NPPES.
Does Dr. Maria Diaz accept Medicare assignment?
Yes. Dr. Maria Diaz accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Maria Diaz commonly perform?
Top Medicare-reported procedures in 2023: Emergency department visit with moderate level of medical decision making (HCPCS 99284); Emergency department visit with high level of medical decision making (HCPCS 99285); Emergency department visit with low level of medical decision making (HCPCS 99283). Source: CMS Medicare Physician & Other Practitioners file.