2026 NPPES data Nurse Practitioner NPI 1255355756 N.P.
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CHARLES OSLER, N.P.

Nurse Practitioner in COLCHESTER, Vermont. 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
65
Medicare Part D claims · 49 beneficiaries · Nurse Practitioner avg: 1K

What the federal data shows

CHARLES OSLER, N.P. filed 65 Medicare Part D claims in 2023 as a Nurse Practitioner in COLCHESTER, Vermont.

65
Part D claims, 2023

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.

CHARLES OSLER, N.P.'s Medicare Part D volume vs every U.S. prescriber

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

65 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 CHARLES OSLER, N.P.?

Quality data not reported

NPI registry status

Active

Issued 07/27/2006

NPI 1255355756

Primary specialty

Nurse Practitioner

High-volume

87,227 US NPIs in this specialty

Medicare Part D claims

65 94% vs specialty avg

2023 prescription claims

Specialty avg: 1,084

Specialty distribution in Vermont

How Nurse Practitioner compares to other specialties among Vermont providers

Vermont providers

Nurse Practitioner share within Vermont

1. Nurse Practitioner42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Nurse Practitioner share within Vermont

Specialty board-certification context

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

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

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

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

CHARLES OSLER, N.P. is a Nurse Practitioner provider practicing in COLCHESTER, Vermont, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: N.P.. NPI: 1255355756. 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.

CHARLES OSLER, N.P. appears in the CMS NPPES registry as a Nurse Practitioner provider holding N.P. credentials at 790 COLLEGE PKWY, COLCHESTER, VT, 05446, with a listed phone of (802) 847-7572. NPI 1255355756 was issued on 07/27/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what OSLER 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 65 prescription claims written by this provider, covering 49 Medicare beneficiaries and totaling roughly $608 in drug spend. 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.

Nurse Practitioner is a high-volume specialty nationwide, with 87,227 enrolled providers across 56 states and an average of 1,084 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

790 COLLEGE PKWY
COLCHESTER, VT 05446

Provider Details

NPI 1255355756
Specialty Nurse Practitioner
Credentials N.P.
Gender Male
NPI Issued 07/27/2006

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

65
Total Claims
$608
Total Drug Cost
49
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
65
Total Day Supply
451
Generic Drug Cost
$586
Antibiotic Claims
36

Patient Demographics

Average Patient Age
67.4 years
Avg HCC Risk Score
0.93
Gender Split
41% female / 59% male
Age Distribution
<65: 14, 65-74: 21, 75-84: N/A, 85+: N/A

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Cephalexin
15

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

Nurse Practitioner Overview

How CHARLES OSLER, N.P. fits within the Nurse Practitioner landscape nationally.

87,227
Nurse Practitioner Providers in US
56
States with Nurse Practitioner
1,084
Avg Claims per Provider

CHARLES OSLER, N.P.'s 65 claims are below the specialty average of 1,084.

Nearby Nurse Practitioner Providers in Vermont

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

Compare Nurse Practitioner nationally: see state-by-state distribution →

Frequently Asked Questions

What is CHARLES OSLER, N.P.'s specialty?
CHARLES OSLER, N.P. specializes in Nurse Practitioner and practices in COLCHESTER, Vermont. Credentials: N.P..
How much does CHARLES OSLER, N.P. prescribe under Medicare Part D?
In 2023, CHARLES OSLER, N.P. wrote 65 Medicare Part D claims totaling $608 in drug costs for 49 beneficiaries.
Where is CHARLES OSLER, N.P. located?
CHARLES OSLER, N.P. is located at 790 COLLEGE PKWY, COLCHESTER, VT, 05446. Phone: (802) 847-7572.
What is CHARLES OSLER, N.P.'s NPI number?
CHARLES OSLER, N.P.'s National Provider Identifier (NPI) is 1255355756, issued on 07/27/2006.
How many Nurse Practitioner providers are there in the US?
There are 87,227 Nurse Practitioner providers across 56 states in the US. The average Nurse Practitioner provider writes 1,084 Medicare Part D claims per year.
What drugs does CHARLES OSLER, N.P. prescribe most often?
Based on 2023 Medicare Part D data, CHARLES OSLER, N.P.'s most frequently prescribed drugs include Cephalexin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does CHARLES OSLER, N.P. accept Medicare?
CHARLES OSLER, N.P. appears in CMS Medicare data with 65 Part D claims and 49 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify CHARLES OSLER, N.P.'s credentials?
CHARLES OSLER, N.P.'s NPI is 1255355756 with credentials N.P.. 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