2026 NPPES data Optometrist NPI 1821309600 O.D.
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RYAN LOSH, O.D.

Optometrist in MARYVILLE, Missouri. 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
98
Medicare Part D claims · 34 beneficiaries · Optometrist avg: 257
Generic prescribing
80%
generic claims · 20% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$199.82
6 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

RYAN LOSH, O.D. filed 98 Medicare Part D claims in 2023 as a Optometrist in MARYVILLE, Missouri, prescribing 80% generic.

98
Part D claims, 2023
80%
generic prescribing
$199.82
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.

RYAN LOSH, O.D.'s Medicare Part D volume vs every U.S. prescriber

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

98 0th percentile higher than 0% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). This entry sits in this band. 200–400: 182,923 prescribers (13%). Above this entry. 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 RYAN LOSH, O.D.?

Quality data not reported

NPI registry status

Active

Issued 06/28/2010

NPI 1821309600

Primary specialty

Optometrist

High-volume

60,463 US NPIs in this specialty

Medicare Part D claims

98 62% vs specialty avg

2023 prescription claims

Specialty avg: 257

Specialty distribution in Missouri

How Optometrist compares to other specialties among Missouri providers

Missouri providers

Optometrist share within Missouri

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

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).

RYAN LOSH, O.D. appears in the CMS NPPES registry as a Optometrist provider holding O.D. credentials at 109 S BUCHANAN ST, MARYVILLE, MO, 64468, with a listed phone of (660) 241-5001. NPI 1821309600 was issued on 06/28/2010. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what LOSH 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 98 prescription claims written by this provider, covering 34 Medicare beneficiaries and totaling roughly $2K in drug spend, split 20% brand-name and 80% 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

109 S BUCHANAN ST
MARYVILLE, MO 64468

Provider Details

NPI 1821309600
Specialty Optometrist
Credentials O.D.
Gender Male
NPI Issued 06/28/2010

Hospital and facility affiliations

Facilities where RYAN LOSH, 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.

WHITE CLOUD HEALTH CENTER LLC
WHITE CLOUD, KS

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 RYAN LOSH, O.D.. Source: openpaymentsdata.cms.gov.

Total received

$200

Largest payer

RxSight 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 · Typical

RYAN LOSH, O.D. — brand share 20.0%
Specialty average (est.)

20% brand-name claims vs 80% generic, on 98 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.

98
Total Claims
$2K
Total Drug Cost
34
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
126
Total Day Supply
3,095
Brand vs Generic
20% brand / 80% generic
Brand Drug Cost
$703
Generic Drug Cost
$1K

Patient Demographics

Average Patient Age
74.7 years
Avg HCC Risk Score
0.82
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.

What RYAN LOSH, O.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
Latanoprost
35
Timolol Maleate
17
Prednisolone Acetate
14

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

Optometrist Overview

How RYAN LOSH, O.D. fits within the Optometrist landscape nationally.

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

RYAN LOSH, O.D.'s 98 claims are below the specialty average of 257.

Nearby Optometrist Providers in Missouri

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

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

Frequently Asked Questions

What is RYAN LOSH, O.D.'s specialty?
RYAN LOSH, O.D. specializes in Optometrist and practices in MARYVILLE, Missouri. Credentials: O.D..
How much does RYAN LOSH, O.D. prescribe under Medicare Part D?
In 2023, RYAN LOSH, O.D. wrote 98 Medicare Part D claims totaling $2K in drug costs for 34 beneficiaries.
Where is RYAN LOSH, O.D. located?
RYAN LOSH, O.D. is located at 109 S BUCHANAN ST, MARYVILLE, MO, 64468. Phone: (660) 241-5001.
What is RYAN LOSH, O.D.'s NPI number?
RYAN LOSH, O.D.'s National Provider Identifier (NPI) is 1821309600, issued on 06/28/2010.
Does RYAN LOSH, O.D. prescribe more brand-name or generic drugs?
RYAN LOSH, O.D.'s prescribing is 20% brand-name and 80% generic drugs by claim count, with $703 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 RYAN LOSH, O.D. prescribe most often?
Based on 2023 Medicare Part D data, RYAN LOSH, 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 RYAN LOSH, O.D. accept Medicare?
RYAN LOSH, O.D. appears in CMS Medicare data with 98 Part D claims and 34 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify RYAN LOSH, O.D.'s credentials?
RYAN LOSH, O.D.'s NPI is 1821309600 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