2026 NPPES data Family Medicine Physician NPI 1164041455 MD
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TIMOTHY CHMIELEWSKI, MD

Family Medicine Physician in CHESTERFIELD, Michigan. 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
711
Medicare Part D claims · 262 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
91%
generic claims · 9% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
86.691/100
▲ 4 pts above national avg 83.1 · [object Object]
Industry payments
$650.18
20 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

TIMOTHY CHMIELEWSKI, MD reported a CMS MIPS final score of 86.691/100 — above the 83.1 national average — and filed 711 Medicare Part D claims in 2023.

86.691/100
MIPS score · +4 vs avg
711
Part D claims, 2023
91%
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.

TIMOTHY CHMIELEWSKI, MD's MIPS score vs every scored U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023 — the federal quality measure

87 Top 48% higher than 52% of 477,587 scored providers

0–10: 8,684 scored providers (2%). Below this entry. 10–20: 3,008 scored providers (1%). Below this entry. 20–30: 3,069 scored providers (1%). Below this entry. 30–40: 2,746 scored providers (1%). Below this entry. 40–50: 2,928 scored providers (1%). Below this entry. 50–60: 5,882 scored providers (1%). Below this entry. 60–70: 13,906 scored providers (3%). Below this entry. 70–80: 118,074 scored providers (25%). Below this entry. 80–90: 129,887 scored providers (27%). This entry sits in this band. 90–100: 189,403 scored providers (40%). Above this entry. This provider 0 100 every MIPS-scored clinician, bucketed by value

Each bar is a band; taller bars hold more scored providers. 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 Merit-based Incentive Payment System (MIPS) · 2023

Board certification likely (heuristic — not verified)

TIMOTHY CHMIELEWSKI, 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).

What does the federal data show about TIMOTHY CHMIELEWSKI, MD?

High performer (top quartile)

NPI registry status

Active

Issued 04/16/2020

NPI 1164041455

Primary specialty

Family Medicine Physician

High-volume

147,640 US NPIs in this specialty

Medicare Part D claims

711 79% vs specialty avg

2023 prescription claims

Specialty avg: 3,418

MIPS final score

86.691/100 3.591000000000008% pts

Above neutral band

vs 83.1 national avg

Specialty distribution in Michigan

How Family Medicine Physician compares to other specialties among Michigan providers

Michigan providers

Family Medicine Physician share within Michigan

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

Medicare quality performance — MIPS

TIMOTHY CHMIELEWSKI, MD's 2023 MIPS final score plotted against the Family Medicine Physician national average

High performer (top quartile)
MIPS Final Score
86.691/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Family Medicine Physician) — 86.691/100 vs national avg 83.1

0%100%National avg83%86.7%
MIPS final score (Family Medicine Physician) — 86.691/100 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).

TIMOTHY CHMIELEWSKI, MD appears in the CMS NPPES registry as a Family Medicine Physician provider holding MD credentials at 36750 26 MILE RD STE 220, CHESTERFIELD, MI, 48047, with a listed phone of (586) 725-0477. NPI 1164041455 was issued on 04/16/2020. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what CHMIELEWSKI 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 711 prescription claims written by this provider, covering 262 Medicare beneficiaries and totaling roughly $60K in drug spend, split 9% brand-name and 91% 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 86.691/100 for the 2023 performance year (Quality 91.9174, Cost 63.7194), compared with the national average of 83.1.

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

36750 26 MILE RD STE 220
CHESTERFIELD, MI 48047

Provider Details

NPI 1164041455
Specialty Family Medicine Physician
Credentials MD
Gender Male
NPI Issued 04/16/2020

CMS Quality Score (MIPS)

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

86.691
Final Score
Avg: 83.1
91.9174
Quality
63.7194
Cost
100
Promoting Interoperability

Reporting: Group practice

Hospital and facility affiliations

Facilities where TIMOTHY CHMIELEWSKI, 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.

ASCENSION MICHIGAN-CMG
NEW BALTIMORE, MI

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

Industry payments received (2024) — CMS Open Payments transparency data

The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for TIMOTHY CHMIELEWSKI, MD. Source: openpaymentsdata.cms.gov.

Total received

$650

Largest payer

GlaxoSmithKline, LLC.

Most common payment type

Food and Beverage

Industry payments are not necessarily indicators of bias — they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.

License & disciplinary context — Michigan MI-BOM 2023 annual report

Aggregate state board data only — NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~41K Michigan medical licensees in 2023 — they are NOT specific to TIMOTHY CHMIELEWSKI, MD. To verify TIMOTHY CHMIELEWSKI, MD's current license status, search the MI-BOM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

123
Total board actions, Michigan 2023
Across 120 cases
3.00
Actions per 1,000 licensees
Michigan statewide rate
probation
Most common action type
44 cases

MI-BOM publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Michigan disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Brand vs generic prescribing mix · Generic-heavy

TIMOTHY CHMIELEWSKI, MD — brand share 9.0%
Specialty average (est.)

9% brand-name claims vs 91% generic, on 711 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.

711
Total Claims
$60K
Total Drug Cost
262
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,276
Total Day Supply
32,410
Brand vs Generic
9% brand / 91% generic
Brand Drug Cost
$48K
Generic Drug Cost
$11K
Antibiotic Claims
99

Patient Demographics

Average Patient Age
70.0 years
Avg HCC Risk Score
1.30
Gender Split
56% female / 44% male
Age Distribution
<65: 49, 65-74: 120, 75-84: 70, 85+: 23

Top Prescribed Drugs (Medicare Part D)

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

What TIMOTHY CHMIELEWSKI, 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
Prednisone
54
Atorvastatin Calcium
41
Metformin Hcl
24
Amoxicillin-Clavulanate Potass
Amoxicillin/Potassium Clav
23
Albuterol Sulfate Hfa
Albuterol Sulfate
21
Fluticasone Propionate
21
Azithromycin
20
Famotidine
15
Naproxen
14
Metoprolol Succinate
13

* 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 TIMOTHY CHMIELEWSKI, 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

TIMOTHY CHMIELEWSKI, MD's 711 claims are below the specialty average of 3,418.

Nearby Family Medicine Physician Providers in Michigan

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

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

Frequently Asked Questions

What is TIMOTHY CHMIELEWSKI, MD's specialty?
TIMOTHY CHMIELEWSKI, MD specializes in Family Medicine Physician and practices in CHESTERFIELD, Michigan. Credentials: MD.
How much does TIMOTHY CHMIELEWSKI, MD prescribe under Medicare Part D?
In 2023, TIMOTHY CHMIELEWSKI, MD wrote 711 Medicare Part D claims totaling $60K in drug costs for 262 beneficiaries.
What is TIMOTHY CHMIELEWSKI, MD's Medicare quality score?
TIMOTHY CHMIELEWSKI, MD has a CMS MIPS Final Score of 86.691/100 (Quality: 91.9174, Cost: 63.7194). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is TIMOTHY CHMIELEWSKI, MD located?
TIMOTHY CHMIELEWSKI, MD is located at 36750 26 MILE RD STE 220, CHESTERFIELD, MI, 48047. Phone: (586) 725-0477.
What is TIMOTHY CHMIELEWSKI, MD's NPI number?
TIMOTHY CHMIELEWSKI, MD's National Provider Identifier (NPI) is 1164041455, issued on 04/16/2020.
Does TIMOTHY CHMIELEWSKI, MD prescribe more brand-name or generic drugs?
TIMOTHY CHMIELEWSKI, MD's prescribing is 9% brand-name and 91% generic drugs by claim count, with $48K 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 TIMOTHY CHMIELEWSKI, MD prescribe most often?
Based on 2023 Medicare Part D data, TIMOTHY CHMIELEWSKI, MD's most frequently prescribed drugs include Prednisone, Atorvastatin Calcium, Metformin Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does TIMOTHY CHMIELEWSKI, MD accept Medicare?
TIMOTHY CHMIELEWSKI, MD appears in CMS Medicare data with 711 Part D claims and 262 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify TIMOTHY CHMIELEWSKI, MD's credentials?
TIMOTHY CHMIELEWSKI, MD's NPI is 1164041455 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