2026 NPPES data Anesthesiology Physician NPI 1184042533 DO
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BRIAN MAXFIELD, DO

Anesthesiology Physician in MAYWOOD, Illinois. 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
4K
Medicare Part D claims · 713 beneficiaries · Anesthesiology Physician avg: 860
Generic prescribing
98%
generic claims · 2% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
96.3822/100
▲ 13 pts above national avg 83.1 · [object Object]
Industry payments
$764.3
14 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

BRIAN MAXFIELD, DO reported a CMS MIPS final score of 96.3822/100 — above the 83.1 national average — and filed 4,042 Medicare Part D claims in 2023.

96.3822/100
MIPS score · +13 vs avg
4K
Part D claims, 2023
98%
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.

BRIAN MAXFIELD, DO's MIPS score vs every scored U.S. clinician

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

96 Top 17% higher than 83% 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%). Below this entry. 90–100: 189,403 scored providers (40%). This entry sits in this band. 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)

BRIAN MAXFIELD, DO 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 BRIAN MAXFIELD, DO?

High performer (top quartile)

NPI registry status

Active

Issued 04/02/2014

NPI 1184042533

Primary specialty

Anesthesiology Physician

High-volume

56,398 US NPIs in this specialty

Medicare Part D claims

4,042 370% vs specialty avg

2023 prescription claims

Specialty avg: 860

MIPS final score

96.3822/100 13.282200000000003% pts

Exceptional band

vs 83.1 national avg

Specialty distribution in Illinois

How Anesthesiology Physician compares to other specialties among Illinois providers

Illinois providers

Anesthesiology Physician share within Illinois

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

Medicare quality performance — MIPS

BRIAN MAXFIELD, DO's 2023 MIPS final score plotted against the Anesthesiology Physician national average

High performer (top quartile)
MIPS Final Score
96.3822/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Anesthesiology Physician) — 96.3822/100 vs national avg 83.1

0%100%National avg83%96.4%
MIPS final score (Anesthesiology Physician) — 96.3822/100 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).

BRIAN MAXFIELD, DO appears in the CMS NPPES registry as a Anesthesiology Physician provider holding DO credentials at 2160 S 1ST AVE, MAYWOOD, IL, 60153, with a listed phone of (708) 216-9169. NPI 1184042533 was issued on 04/02/2014. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what MAXFIELD 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 4,042 prescription claims written by this provider, covering 713 Medicare beneficiaries and totaling roughly $162K in drug spend, split 2% brand-name and 98% generic by claim count, with an opioid prescribing rate of 70.2%. 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 96.3822/100 for the 2023 performance year (Quality 80.5353), compared with the national average of 83.1.

Anesthesiology Physician is a high-volume specialty nationwide, with 56,398 enrolled providers across 56 states and an average of 860 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

2160 S 1ST AVE
MAYWOOD, IL 60153

Provider Details

NPI 1184042533
Specialty Anesthesiology Physician
Credentials DO
Gender Male
NPI Issued 04/02/2014

CMS Quality Score (MIPS)

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

96.3822
Final Score
Avg: 83.1
80.5353
Quality
100
Promoting Interoperability

Reporting: Individual

Hospital and facility affiliations

Facilities where BRIAN MAXFIELD, DO 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.

LOYOLA UNIVERSITY MEDICAL CENTER
★★☆☆☆ 2/5
MAYWOOD, IL
Acute Care Hospitals
CMS CCN: 140276

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 BRIAN MAXFIELD, DO. Source: openpaymentsdata.cms.gov.

Total received

$764

Largest payer

Abbott Laboratories

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 — Illinois IDFPR 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 ~42K Illinois medical licensees in 2023 — they are NOT specific to BRIAN MAXFIELD, DO. To verify BRIAN MAXFIELD, DO's current license status, search the IDFPR public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

106
Total board actions, Illinois 2023
Across 103 cases
2.52
Actions per 1,000 licensees
Illinois statewide rate
probation
Most common action type
38 cases

IDFPR 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 Illinois disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Brand vs generic prescribing mix · Generic-heavy

BRIAN MAXFIELD, DO — brand share 2.0%
Specialty average (est.)

2% brand-name claims vs 98% generic, on 4,042 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.

4,042
Total Claims
$162K
Total Drug Cost
713
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
4,271
Total Day Supply
115,780
Brand vs Generic
2% brand / 98% generic
Brand Drug Cost
$16K
Generic Drug Cost
$145K
Opioid Claims
2,837 (70.2% rate)
Antibiotic Claims
28

Patient Demographics

Average Patient Age
63.9 years
Avg HCC Risk Score
1.86
Gender Split
64% female / 36% male
Age Distribution
<65: 340, 65-74: 274, 75-84: 85, 85+: 14

Top Prescribed Drugs (Medicare Part D)

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

What BRIAN MAXFIELD, DO 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
Hydrocodone-Acetaminophen
Hydrocodone/Acetaminophen
1,725
Oxycodone-Acetaminophen
Oxycodone Hcl/Acetaminophen
636
Gabapentin
317
Cyclobenzaprine Hcl
247
Pregabalin
194
Oxycodone Hcl
170
Tizanidine Hcl
159
Tramadol Hcl
131
Morphine Sulfate
66
Acetaminophen-Codeine
Acetaminophen With Codeine
44

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

Anesthesiology Physician Overview

How BRIAN MAXFIELD, DO fits within the Anesthesiology Physician landscape nationally.

56,398
Anesthesiology Physician Providers in US
56
States with Anesthesiology Physician
860
Avg Claims per Provider

BRIAN MAXFIELD, DO's 4,042 claims are above the specialty average of 860.

Nearby Anesthesiology Physician Providers in Illinois

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

Compare Anesthesiology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is BRIAN MAXFIELD, DO's specialty?
BRIAN MAXFIELD, DO specializes in Anesthesiology Physician and practices in MAYWOOD, Illinois. Credentials: DO.
How much does BRIAN MAXFIELD, DO prescribe under Medicare Part D?
In 2023, BRIAN MAXFIELD, DO wrote 4,042 Medicare Part D claims totaling $162K in drug costs for 713 beneficiaries.
What is BRIAN MAXFIELD, DO's Medicare quality score?
BRIAN MAXFIELD, DO has a CMS MIPS Final Score of 96.3822/100 (Quality: 80.5353). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is BRIAN MAXFIELD, DO located?
BRIAN MAXFIELD, DO is located at 2160 S 1ST AVE, MAYWOOD, IL, 60153. Phone: (708) 216-9169.
What is BRIAN MAXFIELD, DO's NPI number?
BRIAN MAXFIELD, DO's National Provider Identifier (NPI) is 1184042533, issued on 04/02/2014.
Does BRIAN MAXFIELD, DO prescribe more brand-name or generic drugs?
BRIAN MAXFIELD, DO's prescribing is 2% brand-name and 98% generic drugs by claim count, with $16K in brand drug costs.
Does BRIAN MAXFIELD, DO prescribe opioids?
Yes, BRIAN MAXFIELD, DO had 2,837 opioid claims in 2023 with an opioid prescribing rate of 70.2%.
How many Anesthesiology Physician providers are there in the US?
There are 56,398 Anesthesiology Physician providers across 56 states in the US. The average Anesthesiology Physician provider writes 860 Medicare Part D claims per year.
What drugs does BRIAN MAXFIELD, DO prescribe most often?
Based on 2023 Medicare Part D data, BRIAN MAXFIELD, DO's most frequently prescribed drugs include Hydrocodone-Acetaminophen, Oxycodone-Acetaminophen, Gabapentin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does BRIAN MAXFIELD, DO accept Medicare?
BRIAN MAXFIELD, DO appears in CMS Medicare data with 4,042 Part D claims and 713 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify BRIAN MAXFIELD, DO's credentials?
BRIAN MAXFIELD, DO's NPI is 1184042533 with credentials DO. 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