2026 NPPES data Addiction Medicine (Family Medicine) Physician NPI 1669559100 MD
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MARK DELON LIM, MD

Addiction Medicine (Family Medicine) Physician in BIDDEFORD, 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
246
Medicare Part D claims · 22 beneficiaries · Addiction Medicine (Family Medicine) Physician avg: 1K
Generic prescribing
96%
generic claims · 4% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
98.0699/100
▲ 15 pts above national avg 83.1 · [object Object]
What the federal data reveals: MARK DELON LIM, MD is a Addiction Medicine (Family Medicine) Physician ([object Object]) practicing in BIDDEFORD, Maine with a Medicare Part D prescribing footprint of 246 claims across 22 beneficiaries — 4% brand-name prescribing . Their CMS MIPS Final Score of 98.0699/100 (national average: 83.1) reflects performance across Quality, Cost, Interoperability, and Improvement Activities .

What stands out: MARK DELON LIM, MD reported a CMS MIPS final score of 98.0699 out of 100, above the 83.1 national average, and filed 246 Medicare Part D claims in 2023. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

MARK DELON LIM, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

MARK DELON LIM, MD at a glance

High performer (top quartile)

NPI registry status

Active

Issued 11/01/2006

NPI 1669559100

Primary specialty

Addiction Medicine (Family Medicine) Physician

Niche

763 US NPIs in this specialty

Medicare Part D claims

246 78% vs specialty avg

2023 prescription claims

Specialty avg: 1,134

MIPS final score

98.0699/100 14.96990000000001% pts

Exceptional band

vs 83.1 national avg

Specialty distribution in Maine

How Addiction Medicine (Family Medicine) Physician compares to other specialties among Maine providers

Maine providers

Addiction Medicine (Family Medicine) Physician share within Maine

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

Medicare quality performance — MIPS

MARK DELON LIM, MD's 2023 MIPS final score plotted against the Addiction Medicine (Family Medicine) Physician national average

High performer (top quartile)
MIPS Final Score
98.0699/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Addiction Medicine (Family Medicine) Physician) — 98.0699/100 vs national avg 83.1

0%100%National avg83%98.1%
MIPS final score (Addiction Medicine (Family Medicine) Physician) — 98.0699/100 vs national avg 83.1

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).

MARK DELON LIM, MD is a Addiction Medicine (Family Medicine) Physician provider practicing in BIDDEFORD, Maine, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1669559100. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

MARK DELON LIM, MD appears in the CMS NPPES registry as a Addiction Medicine (Family Medicine) Physician provider holding MD credentials at 235 MAIN ST, BIDDEFORD, ME, 04005, with a listed phone of (207) 283-7660. NPI 1669559100 was issued on 11/01/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what LIM 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 246 prescription claims written by this provider, covering 22 Medicare beneficiaries and totaling roughly $16K in drug spend, split 4% brand-name and 96% 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. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 98.0699/100 for the 2023 performance year (Quality 86.1398), compared with the national average of 83.1.

Addiction Medicine (Family Medicine) Physician is a narrow specialty nationwide, with 763 enrolled providers across 48 states and an average of 1,134 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

235 MAIN ST
BIDDEFORD, ME 04005

Provider Details

NPI 1669559100
Specialty Addiction Medicine (Family Medicine) Physician
Credentials MD
Gender Male
NPI Issued 11/01/2006

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

98.0699
Final Score
Avg: 83.1
86.1398
Quality
100
Promoting Interoperability

Reporting: Alternative Payment Model

Hospital and facility affiliations

Facilities where MARK DELON LIM, 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.

MAINEHEALTH
PORTLAND, ME

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 · Generic-heavy

MARK DELON LIM, MD — brand share 4.0%
Specialty average (est.)

4% brand-name claims vs 96% generic, on 246 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.

246
Total Claims
$16K
Total Drug Cost
22
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
250
Total Day Supply
3,884
Brand vs Generic
4% brand / 96% generic
Brand Drug Cost
$4K
Generic Drug Cost
$12K

Patient Demographics

Average Patient Age
56.5 years
Avg HCC Risk Score
1.30
Gender Split
50% female / 50% 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
Buprenorphine-Naloxone
Buprenorphine Hcl/Naloxone Hcl
200
Gabapentin
26

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

Addiction Medicine (Family Medicine) Physician Overview

How MARK DELON LIM, MD fits within the Addiction Medicine (Family Medicine) Physician landscape nationally.

763
Addiction Medicine (Family Medicine) Physician Providers in US
48
States with Addiction Medicine (Family Medicine) Physician
1,134
Avg Claims per Provider

MARK DELON LIM, MD's 246 claims are below the specialty average of 1,134.

Nearby Addiction Medicine (Family Medicine) Physician Providers in Maine

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

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

Frequently Asked Questions

What is MARK DELON LIM, MD's specialty?
MARK DELON LIM, MD specializes in Addiction Medicine (Family Medicine) Physician and practices in BIDDEFORD, Maine. Credentials: MD.
How much does MARK DELON LIM, MD prescribe under Medicare Part D?
In 2023, MARK DELON LIM, MD wrote 246 Medicare Part D claims totaling $16K in drug costs for 22 beneficiaries.
What is MARK DELON LIM, MD's Medicare quality score?
MARK DELON LIM, MD has a CMS MIPS Final Score of 98.0699/100 (Quality: 86.1398). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is MARK DELON LIM, MD located?
MARK DELON LIM, MD is located at 235 MAIN ST, BIDDEFORD, ME, 04005. Phone: (207) 283-7660.
What is MARK DELON LIM, MD's NPI number?
MARK DELON LIM, MD's National Provider Identifier (NPI) is 1669559100, issued on 11/01/2006.
Does MARK DELON LIM, MD prescribe more brand-name or generic drugs?
MARK DELON LIM, MD's prescribing is 4% brand-name and 96% generic drugs by claim count, with $4K in brand drug costs.
How many Addiction Medicine (Family Medicine) Physician providers are there in the US?
There are 763 Addiction Medicine (Family Medicine) Physician providers across 48 states in the US. The average Addiction Medicine (Family Medicine) Physician provider writes 1,134 Medicare Part D claims per year.
What drugs does MARK DELON LIM, MD prescribe most often?
Based on 2023 Medicare Part D data, MARK DELON LIM, MD's most frequently prescribed drugs include Buprenorphine-Naloxone, Gabapentin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does MARK DELON LIM, MD accept Medicare?
MARK DELON LIM, MD appears in CMS Medicare data with 246 Part D claims and 22 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify MARK DELON LIM, MD's credentials?
MARK DELON LIM, MD's NPI is 1669559100 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.
Quality Performance
CMS Merit-based Incentive Payment System (MIPS) — 2023 performance year.
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