2026 NPPES data Otolaryngology Physician NPI 1912958836 M.D.
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JUSTIN MCNAMAR, M.D.

Otolaryngology Physician in MADISON, Wisconsin. 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
366
Medicare Part D claims · 203 beneficiaries · Otolaryngology Physician avg: 509
Generic prescribing
94%
generic claims · 6% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

JUSTIN MCNAMAR, M.D. filed 366 Medicare Part D claims in 2023 as a Otolaryngology Physician in MADISON, Wisconsin, prescribing 94% generic.

366
Part D claims, 2023
94%
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.

JUSTIN MCNAMAR, M.D.'s Medicare Part D volume vs every U.S. prescriber

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

366 Top 43% higher than 57% of 1,370,886 prescribers

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

JUSTIN MCNAMAR, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 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 JUSTIN MCNAMAR, M.D.?

Quality data not reported

NPI registry status

Active

Issued 05/15/2006

NPI 1912958836

Primary specialty

Otolaryngology Physician

Mid-sized

10,895 US NPIs in this specialty

Medicare Part D claims

366 28% vs specialty avg

2023 prescription claims

Specialty avg: 509

Specialty distribution in Wisconsin

How Otolaryngology Physician compares to other specialties among Wisconsin providers

Wisconsin providers

Otolaryngology Physician share within Wisconsin

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

Specialty board-certification context

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

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

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

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

JUSTIN MCNAMAR, M.D. appears in the CMS NPPES registry as a Otolaryngology Physician provider holding M.D. credentials at 1821 S STOUGHTON RD, MADISON, WI, 53716, with a listed phone of (608) 260-6000. NPI 1912958836 was issued on 05/15/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what MCNAMAR 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 366 prescription claims written by this provider, covering 203 Medicare beneficiaries and totaling roughly $18K in drug spend, split 6% brand-name and 94% generic by claim count, with an opioid prescribing rate of 9.3%. 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.

Otolaryngology Physician is a mid-sized specialty nationwide, with 10,895 enrolled providers across 54 states and an average of 509 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

1821 S STOUGHTON RD
MADISON, WI 53716

Provider Details

NPI 1912958836
Specialty Otolaryngology Physician
Credentials M.D.
Gender Male
NPI Issued 05/15/2006

Hospital and facility affiliations

Facilities where JUSTIN MCNAMAR, M.D. 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.

DEAN HEALTH SYSTEMS INC
MADISON, WI

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

JUSTIN MCNAMAR, M.D. — brand share 6.0%
Specialty average (est.)

6% brand-name claims vs 94% generic, on 366 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.

366
Total Claims
$18K
Total Drug Cost
203
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
436
Total Day Supply
6,602
Brand vs Generic
6% brand / 94% generic
Brand Drug Cost
$11K
Generic Drug Cost
$6K
Opioid Claims
34 (9.3% rate)
Antibiotic Claims
123

Patient Demographics

Average Patient Age
74.5 years
Avg HCC Risk Score
1.02
Gender Split
52% female / 48% male
Age Distribution
<65: 13, 65-74: 89, 75-84: 71, 85+: 30

Top Prescribed Drugs (Medicare Part D)

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

What JUSTIN MCNAMAR, M.D. 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
Cephalexin
70
Fluticasone Propionate
30
Hydrocodone-Acetaminophen
Hydrocodone/Acetaminophen
28
Ofloxacin
26
Methylprednisolone
25
Amoxicillin
17
Azithromycin
16
Ipratropium Bromide
14
Ondansetron Odt
Ondansetron
14
Ciprofloxacin-Dexamethasone
Ciprofloxacin Hcl/Dexameth
13

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

Otolaryngology Physician Overview

How JUSTIN MCNAMAR, M.D. fits within the Otolaryngology Physician landscape nationally.

10,895
Otolaryngology Physician Providers in US
54
States with Otolaryngology Physician
509
Avg Claims per Provider

JUSTIN MCNAMAR, M.D.'s 366 claims are below the specialty average of 509.

Nearby Otolaryngology Physician Providers in Wisconsin

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

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

Frequently Asked Questions

What is JUSTIN MCNAMAR, M.D.'s specialty?
JUSTIN MCNAMAR, M.D. specializes in Otolaryngology Physician and practices in MADISON, Wisconsin. Credentials: M.D..
How much does JUSTIN MCNAMAR, M.D. prescribe under Medicare Part D?
In 2023, JUSTIN MCNAMAR, M.D. wrote 366 Medicare Part D claims totaling $18K in drug costs for 203 beneficiaries.
Where is JUSTIN MCNAMAR, M.D. located?
JUSTIN MCNAMAR, M.D. is located at 1821 S STOUGHTON RD, MADISON, WI, 53716. Phone: (608) 260-6000.
What is JUSTIN MCNAMAR, M.D.'s NPI number?
JUSTIN MCNAMAR, M.D.'s National Provider Identifier (NPI) is 1912958836, issued on 05/15/2006.
Does JUSTIN MCNAMAR, M.D. prescribe more brand-name or generic drugs?
JUSTIN MCNAMAR, M.D.'s prescribing is 6% brand-name and 94% generic drugs by claim count, with $11K in brand drug costs.
Does JUSTIN MCNAMAR, M.D. prescribe opioids?
Yes, JUSTIN MCNAMAR, M.D. had 34 opioid claims in 2023 with an opioid prescribing rate of 9.3%.
How many Otolaryngology Physician providers are there in the US?
There are 10,895 Otolaryngology Physician providers across 54 states in the US. The average Otolaryngology Physician provider writes 509 Medicare Part D claims per year.
What drugs does JUSTIN MCNAMAR, M.D. prescribe most often?
Based on 2023 Medicare Part D data, JUSTIN MCNAMAR, M.D.'s most frequently prescribed drugs include Cephalexin, Fluticasone Propionate, Hydrocodone-Acetaminophen. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does JUSTIN MCNAMAR, M.D. accept Medicare?
JUSTIN MCNAMAR, M.D. appears in CMS Medicare data with 366 Part D claims and 203 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify JUSTIN MCNAMAR, M.D.'s credentials?
JUSTIN MCNAMAR, M.D.'s NPI is 1912958836 with credentials M.D.. 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