2026 NPPES data Sleep Medicine (Internal Medicine) Physician NPI 1831283936 M.D.
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HAVEN MALISH, M.D.

Sleep Medicine (Internal Medicine) Physician in BISMARCK, North Dakota. 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
554
Medicare Part D claims · 95 beneficiaries · Sleep Medicine (Internal Medicine) Physician avg: 1K
Generic prescribing
39%
generic claims · 61% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$6.4K
47 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

HAVEN MALISH, M.D. filed 554 Medicare Part D claims in 2023 as a Sleep Medicine (Internal Medicine) Physician in BISMARCK, North Dakota, prescribing 39% generic.

554
Part D claims, 2023
39%
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.

HAVEN MALISH, M.D.'s Medicare Part D volume vs every U.S. prescriber

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

554 Top 34% higher than 66% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). This entry sits in this band. 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)

HAVEN MALISH, 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 HAVEN MALISH, M.D.?

Quality data not reported

NPI registry status

Active

Issued 10/03/2006

NPI 1831283936

Primary specialty

Sleep Medicine (Internal Medicine) Physician

Niche

857 US NPIs in this specialty

Medicare Part D claims

554 58% vs specialty avg

2023 prescription claims

Specialty avg: 1,310

Specialty distribution in North Dakota

How Sleep Medicine (Internal Medicine) Physician compares to other specialties among North Dakota providers

North Dakota providers

Sleep Medicine (Internal Medicine) Physician share within North Dakota

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

Specialty board-certification context

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

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

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

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

HAVEN MALISH, M.D. appears in the CMS NPPES registry as a Sleep Medicine (Internal Medicine) Physician provider holding M.D. credentials at 222 N 7TH ST, BISMARCK, ND, 58501, with a listed phone of (701) 323-6000. NPI 1831283936 was issued on 10/03/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what MALISH 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 554 prescription claims written by this provider, covering 95 Medicare beneficiaries and totaling roughly $283K in drug spend, split 61% brand-name and 39% 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.

Sleep Medicine (Internal Medicine) Physician is a narrow specialty nationwide, with 857 enrolled providers across 52 states and an average of 1,310 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

222 N 7TH ST
BISMARCK, ND 58501

Provider Details

NPI 1831283936
Specialty Sleep Medicine (Internal Medicine) Physician
Credentials M.D.
Gender Male
NPI Issued 10/03/2006

Hospital and facility affiliations

Facilities where HAVEN MALISH, 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.

SANFORD BISMARCK
BISMARCK, ND

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 HAVEN MALISH, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$6.4K

Largest payer

INTUITIVE SURGICAL, INC.

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.

Brand vs generic prescribing mix · Brand-heavy

HAVEN MALISH, M.D. — brand share 61.0%
Specialty average (est.)

61% brand-name claims vs 39% generic, on 554 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.

554
Total Claims
$283K
Total Drug Cost
95
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
816
Total Day Supply
22,675
Brand vs Generic
61% brand / 39% generic
Brand Drug Cost
$274K
Generic Drug Cost
$9K
Antibiotic Claims
26

Patient Demographics

Average Patient Age
73.3 years
Avg HCC Risk Score
1.14
Gender Split
51% female / 49% male

Top Prescribed Drugs (Medicare Part D)

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

What HAVEN MALISH, 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
Trelegy Ellipta
Fluticasone/Umeclidin/Vilanter
74
Montelukast Sodium
67
Breo Ellipta
Fluticasone/Vilanterol
65
Albuterol Sulfate Hfa
Albuterol Sulfate
35
Roflumilast
35
Incruse Ellipta
Umeclidinium Bromide
26
Spiriva Respimat
Tiotropium Bromide
25
Xolair
Omalizumab
24
Anoro Ellipta
Umeclidinium Brm/Vilanterol Tr
23
Azithromycin
23

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

Sleep Medicine (Internal Medicine) Physician Overview

How HAVEN MALISH, M.D. fits within the Sleep Medicine (Internal Medicine) Physician landscape nationally.

857
Sleep Medicine (Internal Medicine) Physician Providers in US
52
States with Sleep Medicine (Internal Medicine) Physician
1,310
Avg Claims per Provider

HAVEN MALISH, M.D.'s 554 claims are below the specialty average of 1,310.

Nearby Sleep Medicine (Internal Medicine) Physician Providers in North Dakota

Other clinicians with the same primary specialty enrolled in North Dakota, drawn from the same CMS NPPES roster as MALISH.

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

Frequently Asked Questions

What is HAVEN MALISH, M.D.'s specialty?
HAVEN MALISH, M.D. specializes in Sleep Medicine (Internal Medicine) Physician and practices in BISMARCK, North Dakota. Credentials: M.D..
How much does HAVEN MALISH, M.D. prescribe under Medicare Part D?
In 2023, HAVEN MALISH, M.D. wrote 554 Medicare Part D claims totaling $283K in drug costs for 95 beneficiaries.
Where is HAVEN MALISH, M.D. located?
HAVEN MALISH, M.D. is located at 222 N 7TH ST, BISMARCK, ND, 58501. Phone: (701) 323-6000.
What is HAVEN MALISH, M.D.'s NPI number?
HAVEN MALISH, M.D.'s National Provider Identifier (NPI) is 1831283936, issued on 10/03/2006.
Does HAVEN MALISH, M.D. prescribe more brand-name or generic drugs?
HAVEN MALISH, M.D.'s prescribing is 61% brand-name and 39% generic drugs by claim count, with $274K in brand drug costs.
How many Sleep Medicine (Internal Medicine) Physician providers are there in the US?
There are 857 Sleep Medicine (Internal Medicine) Physician providers across 52 states in the US. The average Sleep Medicine (Internal Medicine) Physician provider writes 1,310 Medicare Part D claims per year.
What drugs does HAVEN MALISH, M.D. prescribe most often?
Based on 2023 Medicare Part D data, HAVEN MALISH, M.D.'s most frequently prescribed drugs include Trelegy Ellipta, Montelukast Sodium, Breo Ellipta. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does HAVEN MALISH, M.D. accept Medicare?
HAVEN MALISH, M.D. appears in CMS Medicare data with 554 Part D claims and 95 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify HAVEN MALISH, M.D.'s credentials?
HAVEN MALISH, M.D.'s NPI is 1831283936 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