2026 NPPES data Family Medicine Physician NPI 1497372940 MD
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COLIN BONNAR, MD

Family Medicine Physician in LEWISTON, Maine. 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
947
Medicare Part D claims · 104 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
80%
generic claims · 20% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

COLIN BONNAR, MD filed 947 Medicare Part D claims in 2023 as a Family Medicine Physician in LEWISTON, Maine, prescribing 80% generic.

947
Part D claims, 2023
80%
generic prescribing

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.

COLIN BONNAR, MD's Medicare Part D volume vs every U.S. prescriber

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

947 Top 25% higher than 75% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). This entry sits in this band. 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-eligible specialty (heuristic — not verified)

COLIN BONNAR, MD practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about COLIN BONNAR, MD?

Quality data not reported

NPI registry status

Active

Issued 07/01/2020

NPI 1497372940

Primary specialty

Family Medicine Physician

High-volume

147,640 US NPIs in this specialty

Medicare Part D claims

947 72% vs specialty avg

2023 prescription claims

Specialty avg: 3,418

Specialty distribution in Maine

How Family Medicine Physician compares to other specialties among Maine providers

Maine providers

Family Medicine Physician share within Maine

1. Family Medicine Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Family Medicine Physician share within Maine

Specialty board-certification context

Estimated specialty board-certified rate — Family Medicine Physician (ABMS / AOA reference)

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

Est. board-certified rate (Family Medicine Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Family Medicine 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).

COLIN BONNAR, MD appears in the CMS NPPES registry as a Family Medicine Physician provider holding MD credentials at 76 HIGH ST, LEWISTON, ME, 04240, with a listed phone of (207) 795-2800. NPI 1497372940 was issued on 07/01/2020. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what BONNAR 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 947 prescription claims written by this provider, covering 104 Medicare beneficiaries and totaling roughly $169K in drug spend, split 20% brand-name and 80% generic by claim count. 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.

Family Medicine Physician is a high-volume specialty nationwide, with 147,640 enrolled providers across 56 states and an average of 3,418 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

76 HIGH ST
LEWISTON, ME 04240

Provider Details

NPI 1497372940
Specialty Family Medicine Physician
Credentials MD
Gender Male
NPI Issued 07/01/2020

Brand vs generic prescribing mix · Typical

COLIN BONNAR, MD — brand share 20.0%
Specialty average (est.)

20% brand-name claims vs 80% generic, on 947 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.

947
Total Claims
$169K
Total Drug Cost
104
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,952
Total Day Supply
57,098
Brand vs Generic
20% brand / 80% generic
Brand Drug Cost
$147K
Generic Drug Cost
$21K

Patient Demographics

Average Patient Age
62.5 years
Avg HCC Risk Score
1.71
Gender Split
51% female / 49% male
Age Distribution
<65: 46, 65-74: 41, 75-84: N/A, 85+: N/A

Top Prescribed Drugs (Medicare Part D)

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

What COLIN BONNAR, MD prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Atorvastatin Calcium
72
Lisinopril
64
Albuterol Sulfate Hfa
Albuterol Sulfate
41
Losartan Potassium
36
Sertraline Hcl
32
Metformin Hcl
28
Trulicity
Dulaglutide
28
Pregabalin
21
Trazodone Hcl
21
Gabapentin
20

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

Family Medicine Physician Overview

How COLIN BONNAR, MD fits within the Family Medicine Physician landscape nationally.

147,640
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,418
Avg Claims per Provider

COLIN BONNAR, MD's 947 claims are below the specialty average of 3,418.

Nearby Family Medicine Physician Providers in Maine

Other clinicians with the same primary specialty enrolled in Maine, drawn from the same CMS NPPES roster as BONNAR.

Compare Family Medicine Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is COLIN BONNAR, MD's specialty?
COLIN BONNAR, MD specializes in Family Medicine Physician and practices in LEWISTON, Maine. Credentials: MD.
How much does COLIN BONNAR, MD prescribe under Medicare Part D?
In 2023, COLIN BONNAR, MD wrote 947 Medicare Part D claims totaling $169K in drug costs for 104 beneficiaries.
Where is COLIN BONNAR, MD located?
COLIN BONNAR, MD is located at 76 HIGH ST, LEWISTON, ME, 04240. Phone: (207) 795-2800.
What is COLIN BONNAR, MD's NPI number?
COLIN BONNAR, MD's National Provider Identifier (NPI) is 1497372940, issued on 07/01/2020.
Does COLIN BONNAR, MD prescribe more brand-name or generic drugs?
COLIN BONNAR, MD's prescribing is 20% brand-name and 80% generic drugs by claim count, with $147K in brand drug costs.
How many Family Medicine Physician providers are there in the US?
There are 147,640 Family Medicine Physician providers across 56 states in the US. The average Family Medicine Physician provider writes 3,418 Medicare Part D claims per year.
What drugs does COLIN BONNAR, MD prescribe most often?
Based on 2023 Medicare Part D data, COLIN BONNAR, MD's most frequently prescribed drugs include Atorvastatin Calcium, Lisinopril, Albuterol Sulfate Hfa. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does COLIN BONNAR, MD accept Medicare?
COLIN BONNAR, MD appears in CMS Medicare data with 947 Part D claims and 104 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify COLIN BONNAR, MD's credentials?
COLIN BONNAR, MD's NPI is 1497372940 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