2026 NPPES data Family Medicine Physician NPI 1881908366 D.O.
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NATHAN ALLEN, D.O.

Family Medicine Physician in TWIN FALLS, Idaho. 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
6K
Medicare Part D claims · 409 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
88%
generic claims · 12% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

NATHAN ALLEN, D.O. filed 6,261 Medicare Part D claims in 2023 as a Family Medicine Physician in TWIN FALLS, Idaho, prescribing 88% generic.

6K
Part D claims, 2023
88%
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.

NATHAN ALLEN, D.O.'s Medicare Part D volume vs every U.S. prescriber

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

6,261 Top 5% higher than 95% 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%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). Below this entry. 1,600–1,800: 19,072 prescribers (1%). Below this entry. 1,800–2,000: 16,451 prescribers (1%). Below this entry. 2,000–2,200: 213,991 prescribers (16%). This entry sits in this band. 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)

NATHAN ALLEN, D.O. 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 NATHAN ALLEN, D.O.?

Quality data not reported

NPI registry status

Active

Issued 07/27/2010

NPI 1881908366

Primary specialty

Family Medicine Physician

High-volume

147,640 US NPIs in this specialty

Medicare Part D claims

6,261 83% vs specialty avg

2023 prescription claims

Specialty avg: 3,418

Specialty distribution in Idaho

How Family Medicine Physician compares to other specialties among Idaho providers

Idaho providers

Family Medicine Physician share within Idaho

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

Specialty board-certification context

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

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

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

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

NATHAN ALLEN, D.O. appears in the CMS NPPES registry as a Family Medicine Physician provider holding D.O. credentials at 2550 ADDISON AVE E, TWIN FALLS, ID, 83301, with a listed phone of (208) 814-7700. NPI 1881908366 was issued on 07/27/2010. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what ALLEN 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 6,261 prescription claims written by this provider, covering 409 Medicare beneficiaries and totaling roughly $431K in drug spend, split 12% brand-name and 88% generic by claim count, with an opioid prescribing rate of 1.6%. 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.

Family Medicine Physician is a high-volume specialty nationwide, with 147,640 enrolled providers across 56 states and an average of 3,418 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

2550 ADDISON AVE E
TWIN FALLS, ID 83301

Provider Details

NPI 1881908366
Specialty Family Medicine Physician
Credentials D.O.
Gender Male
NPI Issued 07/27/2010

Hospital and facility affiliations

Facilities where NATHAN ALLEN, D.O. 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.

ST LUKES CLINIC LLC
TWIN FALLS, ID

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 · Typical

NATHAN ALLEN, D.O. — brand share 12.0%
Specialty average (est.)

12% brand-name claims vs 88% generic, on 6,261 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.

6,261
Total Claims
$431K
Total Drug Cost
409
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
13,722
Total Day Supply
402,687
Brand vs Generic
12% brand / 88% generic
Brand Drug Cost
$326K
Generic Drug Cost
$102K
Opioid Claims
101 (1.6% rate)
Antibiotic Claims
61

Patient Demographics

Average Patient Age
72.3 years
Avg HCC Risk Score
1.23
Gender Split
52% female / 48% male
Age Distribution
<65: 53, 65-74: 186, 75-84: 125, 85+: 45

Top Prescribed Drugs (Medicare Part D)

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

What NATHAN ALLEN, D.O. 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
Atorvastatin Calcium
478
Levothyroxine Sodium
268
Omeprazole
241
Lisinopril
236
Losartan Potassium
216
Amlodipine Besylate
210
Metformin Hcl Er
Metformin Hcl
210
Gabapentin
138
Tamsulosin Hcl
133
Hydrochlorothiazide
124

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

Family Medicine Physician Overview

How NATHAN ALLEN, D.O. fits within the Family Medicine Physician landscape nationally.

147,640
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,418
Avg Claims per Provider

NATHAN ALLEN, D.O.'s 6,261 claims are above the specialty average of 3,418.

Nearby Family Medicine Physician Providers in Idaho

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

Compare Family Medicine Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is NATHAN ALLEN, D.O.'s specialty?
NATHAN ALLEN, D.O. specializes in Family Medicine Physician and practices in TWIN FALLS, Idaho. Credentials: D.O..
How much does NATHAN ALLEN, D.O. prescribe under Medicare Part D?
In 2023, NATHAN ALLEN, D.O. wrote 6,261 Medicare Part D claims totaling $431K in drug costs for 409 beneficiaries.
Where is NATHAN ALLEN, D.O. located?
NATHAN ALLEN, D.O. is located at 2550 ADDISON AVE E, TWIN FALLS, ID, 83301. Phone: (208) 814-7700.
What is NATHAN ALLEN, D.O.'s NPI number?
NATHAN ALLEN, D.O.'s National Provider Identifier (NPI) is 1881908366, issued on 07/27/2010.
Does NATHAN ALLEN, D.O. prescribe more brand-name or generic drugs?
NATHAN ALLEN, D.O.'s prescribing is 12% brand-name and 88% generic drugs by claim count, with $326K in brand drug costs.
Does NATHAN ALLEN, D.O. prescribe opioids?
Yes, NATHAN ALLEN, D.O. had 101 opioid claims in 2023 with an opioid prescribing rate of 1.6%.
How many Family Medicine Physician providers are there in the US?
There are 147,640 Family Medicine Physician providers across 56 states in the US. The average Family Medicine Physician provider writes 3,418 Medicare Part D claims per year.
What drugs does NATHAN ALLEN, D.O. prescribe most often?
Based on 2023 Medicare Part D data, NATHAN ALLEN, D.O.'s most frequently prescribed drugs include Atorvastatin Calcium, Levothyroxine Sodium, Omeprazole. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does NATHAN ALLEN, D.O. accept Medicare?
NATHAN ALLEN, D.O. appears in CMS Medicare data with 6,261 Part D claims and 409 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify NATHAN ALLEN, D.O.'s credentials?
NATHAN ALLEN, D.O.'s NPI is 1881908366 with credentials D.O.. 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