2026 NPPES data Internal Medicine Physician NPI 1548897929 MD
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LUKE CHMIELECKI, MD

Internal Medicine Physician in PORTLAND, 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 · 44 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
84%
generic claims · 16% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: LUKE CHMIELECKI, MD is a Internal Medicine Physician ([object Object]) practicing in PORTLAND, Maine with a Medicare Part D prescribing footprint of 246 claims across 44 beneficiaries — 16% brand-name prescribing .

What stands out: LUKE CHMIELECKI, MD filed 246 Medicare Part D claims in 2023 across PORTLAND, Maine. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board-eligible specialty (heuristic — not verified)

LUKE CHMIELECKI, 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).

LUKE CHMIELECKI, MD at a glance

Quality data not reported

NPI registry status

Active

Issued 03/25/2020

NPI 1548897929

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

246 91% vs specialty avg

2023 prescription claims

Specialty avg: 2,716

Specialty distribution in Maine

How Internal Medicine Physician compares to other specialties among Maine providers

Maine providers

Internal Medicine Physician share within Maine

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

Specialty board-certification context

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

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

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

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

LUKE CHMIELECKI, MD is a Internal Medicine Physician provider practicing in PORTLAND, Maine, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1548897929. 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.

LUKE CHMIELECKI, MD appears in the CMS NPPES registry as a Internal Medicine Physician provider holding MD credentials at 22 BRAMHALL ST, PORTLAND, ME, 04102, with a listed phone of (207) 283-7000. NPI 1548897929 was issued on 03/25/2020. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what CHMIELECKI 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 44 Medicare beneficiaries and totaling roughly $25K in drug spend, split 16% brand-name and 84% 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.

Internal Medicine Physician is a high-volume specialty nationwide, with 172,858 enrolled providers across 56 states and an average of 2,716 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

22 BRAMHALL ST
PORTLAND, ME 04102

Provider Details

NPI 1548897929
Specialty Internal Medicine Physician
Credentials MD
Gender Male
NPI Issued 03/25/2020

Brand vs generic prescribing mix · Typical

LUKE CHMIELECKI, MD — brand share 16.0%
Specialty average (est.)

16% brand-name claims vs 84% 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
$25K
Total Drug Cost
44
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
374
Total Day Supply
10,002
Brand vs Generic
16% brand / 84% generic
Brand Drug Cost
$19K
Generic Drug Cost
$5K
Antibiotic Claims
12

Patient Demographics

Average Patient Age
66.5 years
Avg HCC Risk Score
2.07
Gender Split
43% female / 57% male
Age Distribution
<65: 17, 65-74: 17, 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.

Drug Claims
Amlodipine Besylate
17
Atorvastatin Calcium
16
Furosemide
16
Lisinopril
15
Spironolactone
15
Carvedilol
14
Diclofenac Sodium
14
Jardiance
Empagliflozin
13
Omeprazole
11

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

Internal Medicine Physician Overview

How LUKE CHMIELECKI, MD fits within the Internal Medicine Physician landscape nationally.

172,858
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider

LUKE CHMIELECKI, MD's 246 claims are below the specialty average of 2,716.

Nearby Internal Medicine Physician Providers in Maine

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

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

Frequently Asked Questions

What is LUKE CHMIELECKI, MD's specialty?
LUKE CHMIELECKI, MD specializes in Internal Medicine Physician and practices in PORTLAND, Maine. Credentials: MD.
How much does LUKE CHMIELECKI, MD prescribe under Medicare Part D?
In 2023, LUKE CHMIELECKI, MD wrote 246 Medicare Part D claims totaling $25K in drug costs for 44 beneficiaries.
Where is LUKE CHMIELECKI, MD located?
LUKE CHMIELECKI, MD is located at 22 BRAMHALL ST, PORTLAND, ME, 04102. Phone: (207) 283-7000.
What is LUKE CHMIELECKI, MD's NPI number?
LUKE CHMIELECKI, MD's National Provider Identifier (NPI) is 1548897929, issued on 03/25/2020.
Does LUKE CHMIELECKI, MD prescribe more brand-name or generic drugs?
LUKE CHMIELECKI, MD's prescribing is 16% brand-name and 84% generic drugs by claim count, with $19K in brand drug costs.
How many Internal Medicine Physician providers are there in the US?
There are 172,858 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does LUKE CHMIELECKI, MD prescribe most often?
Based on 2023 Medicare Part D data, LUKE CHMIELECKI, MD's most frequently prescribed drugs include Amlodipine Besylate, Atorvastatin Calcium, Furosemide. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does LUKE CHMIELECKI, MD accept Medicare?
LUKE CHMIELECKI, MD appears in CMS Medicare data with 246 Part D claims and 44 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify LUKE CHMIELECKI, MD's credentials?
LUKE CHMIELECKI, MD's NPI is 1548897929 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