2026 NPPES data Medical Oncology Physician NPI 1366598955 MD
Verify on CMS →

GABRIEL BROOKS, MD

Medical Oncology Physician in LEBANON, New Hampshire. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
152
Medicare Part D claims · 35 beneficiaries · Medical Oncology Physician avg: 689
Generic prescribing
76%
generic claims · 24% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

GABRIEL BROOKS, MD filed 152 Medicare Part D claims in 2023 as a Medical Oncology Physician in LEBANON, New Hampshire, prescribing 76% generic.

152
Part D claims, 2023
76%
generic prescribing
Likely
board-certified (heuristic)

Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) — no proprietary rating or editorial opinion is applied.

GABRIEL BROOKS, MD's Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

152 35th percentile higher than 35% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). This entry sits in this band. 200–400: 182,923 prescribers (13%). Above this entry. 400–600: 90,619 prescribers (7%). Above this entry. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source CMS Medicare Part D Prescriber Public Use File · 2023

Board certification likely (heuristic — not verified)

GABRIEL BROOKS, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 hospital affiliations — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about GABRIEL BROOKS, MD?

Quality data not reported

NPI registry status

Active

Issued 01/26/2007

NPI 1366598955

Primary specialty

Medical Oncology Physician

Niche

3,792 US NPIs in this specialty

Medicare Part D claims

152 78% vs specialty avg

2023 prescription claims

Specialty avg: 689

Specialty distribution in New Hampshire

How Medical Oncology Physician compares to other specialties among New Hampshire providers

New Hampshire providers

Medical Oncology Physician share within New Hampshire

1. Medical Oncology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Medical Oncology Physician share within New Hampshire

Specialty board-certification context

Estimated specialty board-certified rate — Medical Oncology Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Medical Oncology Physician ABMS/AOA estimate

Est. board-certified rate (Medical Oncology Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Medical Oncology Physician) — ABMS / AOA estimate

The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.

Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).

GABRIEL BROOKS, MD appears in the CMS NPPES registry as a Medical Oncology Physician provider holding MD credentials at 1 MEDICAL CENTER DR, LEBANON, NH, 03756, with a listed phone of (603) 650-7854. NPI 1366598955 was issued on 01/26/2007. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what BROOKS most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 152 prescription claims written by this provider, covering 35 Medicare beneficiaries and totaling roughly $100K in drug spend, split 24% brand-name and 76% generic by claim count, with an opioid prescribing rate of 14.5%. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Medical Oncology Physician is a narrow specialty nationwide, with 3,792 enrolled providers across 53 states and an average of 689 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist — always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.

Practice Address

1 MEDICAL CENTER DR
LEBANON, NH 03756

Provider Details

NPI 1366598955
Specialty Medical Oncology Physician
Credentials MD
Gender Male
NPI Issued 01/26/2007

Hospital and facility affiliations

Facilities where GABRIEL BROOKS, MD bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" — a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.

MARY HITCHCOCK MEMORIAL HOSPITAL
★★★☆☆ 3/5
LEBANON, NH
Acute Care Hospitals
CMS CCN: 300003
DARTMOUTH-HITCHCOCK CLINIC
LEBANON, NH

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

Brand vs generic prescribing mix · Typical

GABRIEL BROOKS, MD — brand share 24.0%
Specialty average (est.)

24% brand-name claims vs 76% generic, on 152 2023 Medicare Part D claims.

The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

152
Total Claims
$100K
Total Drug Cost
35
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
190
Total Day Supply
4,501
Brand vs Generic
24% brand / 76% generic
Brand Drug Cost
$78K
Generic Drug Cost
$22K
Opioid Claims
22 (14.5% rate)

Patient Demographics

Average Patient Age
72.8 years
Avg HCC Risk Score
2.51
Gender Split
43% female / 57% male

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

Drug Claims
Imatinib Mesylate
21
Xarelto
Rivaroxaban
17

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Medical Oncology Physician Overview

How GABRIEL BROOKS, MD fits within the Medical Oncology Physician landscape nationally.

3,792
Medical Oncology Physician Providers in US
53
States with Medical Oncology Physician
689
Avg Claims per Provider

GABRIEL BROOKS, MD's 152 claims are below the specialty average of 689.

Nearby Medical Oncology Physician Providers in New Hampshire

Other clinicians with the same primary specialty enrolled in New Hampshire, drawn from the same CMS NPPES roster as BROOKS.

Compare Medical Oncology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is GABRIEL BROOKS, MD's specialty?
GABRIEL BROOKS, MD specializes in Medical Oncology Physician and practices in LEBANON, New Hampshire. Credentials: MD.
How much does GABRIEL BROOKS, MD prescribe under Medicare Part D?
In 2023, GABRIEL BROOKS, MD wrote 152 Medicare Part D claims totaling $100K in drug costs for 35 beneficiaries.
Where is GABRIEL BROOKS, MD located?
GABRIEL BROOKS, MD is located at 1 MEDICAL CENTER DR, LEBANON, NH, 03756. Phone: (603) 650-7854.
What is GABRIEL BROOKS, MD's NPI number?
GABRIEL BROOKS, MD's National Provider Identifier (NPI) is 1366598955, issued on 01/26/2007.
Does GABRIEL BROOKS, MD prescribe more brand-name or generic drugs?
GABRIEL BROOKS, MD's prescribing is 24% brand-name and 76% generic drugs by claim count, with $78K in brand drug costs.
Does GABRIEL BROOKS, MD prescribe opioids?
Yes, GABRIEL BROOKS, MD had 22 opioid claims in 2023 with an opioid prescribing rate of 14.5%.
How many Medical Oncology Physician providers are there in the US?
There are 3,792 Medical Oncology Physician providers across 53 states in the US. The average Medical Oncology Physician provider writes 689 Medicare Part D claims per year.
What drugs does GABRIEL BROOKS, MD prescribe most often?
Based on 2023 Medicare Part D data, GABRIEL BROOKS, MD's most frequently prescribed drugs include Imatinib Mesylate, Xarelto. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does GABRIEL BROOKS, MD accept Medicare?
GABRIEL BROOKS, MD appears in CMS Medicare data with 152 Part D claims and 35 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify GABRIEL BROOKS, MD's credentials?
GABRIEL BROOKS, MD's NPI is 1366598955 with credentials MD. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.

Data Sources

Provider Directory
CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
Specialty Classification
NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
Prescribing Data
CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
Limitations
Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.

See our complete data methodology for details on how we collect and process government data.

Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).

Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology