2026 NPPES data Optometrist NPI 1275532467 O.D.
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NATHANIEL SHILMAN, O.D.

Optometrist in DICKINSON, 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
284
Medicare Part D claims · 71 beneficiaries · Optometrist avg: 257
Generic prescribing
64%
generic claims · 36% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$14.65
1 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

NATHANIEL SHILMAN, O.D. filed 284 Medicare Part D claims in 2023 as a Optometrist in DICKINSON, North Dakota, prescribing 64% generic.

284
Part D claims, 2023
64%
generic prescribing
$14.65
industry payments (Sunshine Act)

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.

NATHANIEL SHILMAN, O.D.'s Medicare Part D volume vs every U.S. prescriber

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

284 49th percentile higher than 49% 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

What does the federal data show about NATHANIEL SHILMAN, O.D.?

Quality data not reported

NPI registry status

Active

Issued 07/19/2005

NPI 1275532467

Primary specialty

Optometrist

High-volume

60,463 US NPIs in this specialty

Medicare Part D claims

284 11% vs specialty avg

2023 prescription claims

Specialty avg: 257

Specialty distribution in North Dakota

How Optometrist compares to other specialties among North Dakota providers

North Dakota providers

Optometrist share within North Dakota

1. Optometrist42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Optometrist share within North Dakota

Specialty board-certification context

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

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

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

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

NATHANIEL SHILMAN, O.D. is a Optometrist provider practicing in DICKINSON, North Dakota, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: O.D.. NPI: 1275532467. 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.

NATHANIEL SHILMAN, O.D. appears in the CMS NPPES registry as a Optometrist provider holding O.D. credentials at 2273 3RD AVE W, DICKINSON, ND, 58601, with a listed phone of (701) 225-7886. NPI 1275532467 was issued on 07/19/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what SHILMAN 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 284 prescription claims written by this provider, covering 71 Medicare beneficiaries and totaling roughly $24K in drug spend, split 36% brand-name and 64% 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.

Optometrist is a high-volume specialty nationwide, with 60,463 enrolled providers across 56 states and an average of 257 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

2273 3RD AVE W
DICKINSON, ND 58601

Provider Details

NPI 1275532467
Specialty Optometrist
Credentials O.D.
Gender Male
NPI Issued 07/19/2005

Hospital and facility affiliations

Facilities where NATHANIEL SHILMAN, O.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.

MELANIE OLTMANNS OD PC
DICKINSON, 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 NATHANIEL SHILMAN, O.D.. Source: openpaymentsdata.cms.gov.

Total received

$15

Largest payer

Alcon Vision 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.

Brand vs generic prescribing mix · Above average

NATHANIEL SHILMAN, O.D. — brand share 36.0%
Specialty average (est.)

36% brand-name claims vs 64% generic, on 284 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.

284
Total Claims
$24K
Total Drug Cost
71
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
459
Total Day Supply
12,574
Brand vs Generic
36% brand / 64% generic
Brand Drug Cost
$20K
Generic Drug Cost
$4K

Patient Demographics

Average Patient Age
75.4 years
Avg HCC Risk Score
1.07
Gender Split
62% female / 38% male

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Latanoprost
133
Timolol Maleate
48
Prednisolone Acetate
15
Brimonidine Tartrate
13
Cyclosporine
11

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

Optometrist Overview

How NATHANIEL SHILMAN, O.D. fits within the Optometrist landscape nationally.

60,463
Optometrist Providers in US
56
States with Optometrist
257
Avg Claims per Provider

NATHANIEL SHILMAN, O.D.'s 284 claims are above the specialty average of 257.

Nearby Optometrist Providers in North Dakota

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

Compare Optometrist nationally: see state-by-state distribution →

Frequently Asked Questions

What is NATHANIEL SHILMAN, O.D.'s specialty?
NATHANIEL SHILMAN, O.D. specializes in Optometrist and practices in DICKINSON, North Dakota. Credentials: O.D..
How much does NATHANIEL SHILMAN, O.D. prescribe under Medicare Part D?
In 2023, NATHANIEL SHILMAN, O.D. wrote 284 Medicare Part D claims totaling $24K in drug costs for 71 beneficiaries.
Where is NATHANIEL SHILMAN, O.D. located?
NATHANIEL SHILMAN, O.D. is located at 2273 3RD AVE W, DICKINSON, ND, 58601. Phone: (701) 225-7886.
What is NATHANIEL SHILMAN, O.D.'s NPI number?
NATHANIEL SHILMAN, O.D.'s National Provider Identifier (NPI) is 1275532467, issued on 07/19/2005.
Does NATHANIEL SHILMAN, O.D. prescribe more brand-name or generic drugs?
NATHANIEL SHILMAN, O.D.'s prescribing is 36% brand-name and 64% generic drugs by claim count, with $20K in brand drug costs.
How many Optometrist providers are there in the US?
There are 60,463 Optometrist providers across 56 states in the US. The average Optometrist provider writes 257 Medicare Part D claims per year.
What drugs does NATHANIEL SHILMAN, O.D. prescribe most often?
Based on 2023 Medicare Part D data, NATHANIEL SHILMAN, O.D.'s most frequently prescribed drugs include Latanoprost, Timolol Maleate, Prednisolone Acetate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does NATHANIEL SHILMAN, O.D. accept Medicare?
NATHANIEL SHILMAN, O.D. appears in CMS Medicare data with 284 Part D claims and 71 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify NATHANIEL SHILMAN, O.D.'s credentials?
NATHANIEL SHILMAN, O.D.'s NPI is 1275532467 with credentials O.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