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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. BRIAN L. GRETTA M.D.
NPI 1659356384
Emergency Medicine in Derry, NH

Active since December 15, 2005PECOS EnrolledAccepts Medicare Assignment
1 PARKLAND DR, DERRY, NH 03038(207) 794-3321 Get Directions Write a Review

NPPES record last updated: July 31, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Jul 31, 2026, Oct 5, 2023, Dec 13, 2022 (3 updates tracked since 2022).

About Dr. Brian L. Gretta M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. BRIAN L. GRETTA M.D. (NPI 1659356384) is an individual emergency medicine provider in Derry, New Hampshire, licensed in Maine (MD13084) and active in the NPI registry since December 2005. He is enrolled in Medicare PECOS, is affiliated with Liberty Regional Medical Center, and is a graduate of Other (1986).

NPPES Registry Identity

NPI1659356384
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameDR. BRIAN L. GRETTACredential: M.D.
Location Address1 PARKLAND DRDerry, NH 03038-2746
Mailing Address63 Merganser Cove RdOrrs Island, ME 04066-2408 · (603) 432-1500
Phone(207) 794-3321
Sole ProprietorYes
Medical School CMSOtherGraduated 1986
Enumeration DateDecember 15, 2005
Last NPPES UpdateJuly 31, 20263 updates tracked since enumeration
NPPES CertifiedJuly 31, 2026
✔ NPI 1659356384 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
Licenses✔ Licensed in ME · MD13084✔ Licensed in MA · 205530✔ Licensed in GA · 62698
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
1 PARKLAND DR, Derry, NH 03038
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include WellSense Health Plan.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Brian L. Gretta M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID1456384478
PECOS Enrollment IDI20241009001697
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 3

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Emergency department visit with moderate level of medical decision making 99284
An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.
67 services66 patients
Emergency department visit with high level of medical decision making 99285
An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.
32 services30 patients
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010
A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.
18 services17 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Liberty Regional Medical Center

Critical Access Hospitals · Hinesville, GA
OwnershipGovernment - Hospital District or Authority
CMS Certification Number111335
Location462 E G Miles ParkwayHinesville, GA 31310 · Liberty County
Emergency services

Parkland Medical Center

Acute Care Hospitals · Derry, NH
5/5 CMS rating
OwnershipProprietary
CMS Certification Number300017
Location1 Parkland DriveDerry, NH 03038 · Rockingham County
Emergency services

Portsmouth Regional Hospital

Acute Care Hospitals · Portsmouth, NH
3/5 CMS rating
OwnershipProprietary
CMS Certification Number300029
Location333 Borthwick AvePortsmouth, NH 03801 · Rockingham County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 03038 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$89.14 typical visit price
range $57.75 – $174.26
Typical copayment $22.28 (range $14.43 – $43.56)
Most-billed visit code 99203
Established Patient
$101.54 typical visit price
range $18.70 – $142.15
Typical copayment $25.38 (range $4.67 – $35.53)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

RUNNING BROOK EMERGENCY PHYSICIANS, LLC
Emergency Medicine
1 PARKLAND DR
DERRY, NH 03038
Rockingham County (603) 432-1500
DR. MARIA MICHELLE DIAZ M.D.
Emergency Medicine
1 PARKLAND DR
DERRY, NH 03038
Rockingham County (603) 421-2220
DAVID M BRYSON PA-C
Physician Assistant (Medical)
1 PARKLAND DR
DERRY, NH 03038
Rockingham County (603) 421-2220
HCA HEALTH SERVICES OF NEW HAMPSHIRE, INC.
Psychiatric Unit
1 PARKLAND DR
DERRY, NH 03038
Rockingham County (603) 432-1500
MARIA MAGDALENA RIVERA PA
Physician Assistant
1 PARKLAND DR, EMERGENCY DEPARTMENT
DERRY, NH 03038
Rockingham County (603) 432-1500
NUTFIELD ANESTHESIA ASSOCIATES, P.A.
Anesthesiology
1 PARKLAND DR
DERRY, NH 03038
Rockingham County (603) 421-2476
EDWARD MORGENTHAU PA-C
Physician Assistant
1 PARKLAND DR
DERRY, NH 03038
Rockingham County (603) 432-1500
HCA HEALTH SERVICES OF NEW HAMPSHIRE, INC.
General Acute Care Hospital
1 PARKLAND DR
DERRY, NH 03038
Rockingham County (603) 432-1500

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Brian Gretta's NPI number?

The NPI number for Brian Gretta is 1659356384. It was assigned to this individual provider in the NPPES registry on December 15, 2005.

Where is Brian Gretta located?

Brian Gretta practices at 1 Parkland Dr, Derry, NH 03038. The listed phone number is (207) 794-3321.

What is Brian Gretta's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Brian Gretta enrolled in Medicare?

Yes. Brian Gretta is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Brian Gretta accept?

Health plans from WellSense Health Plan list Brian Gretta as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Brian Gretta affiliated with any hospitals?

According to CMS data, Brian Gretta is affiliated with Liberty Regional Medical Center, Parkland Medical Center and Portsmouth Regional Hospital.

When was this NPI record last updated?

The NPPES record for Brian Gretta was last updated on July 31, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 22 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.