2026 NPPES data Family Nurse Practitioner NPI 1891101689 APRN
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TIMOTHY BLAIR, APRN

Family Nurse Practitioner in CHESTER, Montana. 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
5K
Medicare Part D claims · 172 beneficiaries · Family Nurse Practitioner avg: 1K
Generic prescribing
87%
generic claims · 13% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

TIMOTHY BLAIR, APRN filed 4,971 Medicare Part D claims in 2023 as a Family Nurse Practitioner in CHESTER, Montana, prescribing 87% generic.

5K
Part D claims, 2023
87%
generic prescribing

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.

TIMOTHY BLAIR, APRN's Medicare Part D volume vs every U.S. prescriber

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

4,971 Top 6% higher than 94% 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

What does the federal data show about TIMOTHY BLAIR, APRN?

Quality data not reported

NPI registry status

Active

Issued 07/01/2014

NPI 1891101689

Primary specialty

Family Nurse Practitioner

High-volume

209,817 US NPIs in this specialty

Medicare Part D claims

4,971 307% vs specialty avg

2023 prescription claims

Specialty avg: 1,222

Specialty distribution in Montana

How Family Nurse Practitioner compares to other specialties among Montana providers

Montana providers

Family Nurse Practitioner share within Montana

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

Specialty board-certification context

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

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

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

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

TIMOTHY BLAIR, APRN is a Family Nurse Practitioner provider practicing in CHESTER, Montana, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: APRN. NPI: 1891101689. 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.

TIMOTHY BLAIR, APRN appears in the CMS NPPES registry as a Family Nurse Practitioner provider holding APRN credentials at 418 WEST MADISON, CHESTER, MT, 59522, with a listed phone of (406) 759-5194. NPI 1891101689 was issued on 07/01/2014. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what BLAIR 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 4,971 prescription claims written by this provider, covering 172 Medicare beneficiaries and totaling roughly $347K in drug spend, split 13% brand-name and 87% generic by claim count, with an opioid prescribing rate of 2.7%. 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 Nurse Practitioner is a high-volume specialty nationwide, with 209,817 enrolled providers across 56 states and an average of 1,222 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

418 WEST MADISON
CHESTER, MT 59522

Provider Details

NPI 1891101689
Specialty Family Nurse Practitioner
Credentials APRN
Gender Male
NPI Issued 07/01/2014

Hospital and facility affiliations

Facilities where TIMOTHY BLAIR, APRN 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.

LIBERTY COUNTY HOSPITAL AND NURSING HOME INC
CHESTER, MT

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

TIMOTHY BLAIR, APRN — brand share 13.0%
Specialty average (est.)

13% brand-name claims vs 87% generic, on 4,971 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.

4,971
Total Claims
$347K
Total Drug Cost
172
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
6,180
Total Day Supply
175,180
Brand vs Generic
13% brand / 87% generic
Brand Drug Cost
$271K
Generic Drug Cost
$74K
Opioid Claims
134 (2.7% rate)
Antibiotic Claims
85

Patient Demographics

Average Patient Age
75.3 years
Avg HCC Risk Score
1.08
Gender Split
58% female / 42% male
Age Distribution
<65: 11, 65-74: 85, 75-84: 41, 85+: 35

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Potassium Chloride
235
Levothyroxine Sodium
209
Atorvastatin Calcium
188
Losartan Potassium
187
Amlodipine Besylate
186
Rosuvastatin Calcium
185
Hydrochlorothiazide
122
Lisinopril
122
Metoprolol Succinate
115
Furosemide
88

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

Family Nurse Practitioner Overview

How TIMOTHY BLAIR, APRN fits within the Family Nurse Practitioner landscape nationally.

209,817
Family Nurse Practitioner Providers in US
56
States with Family Nurse Practitioner
1,222
Avg Claims per Provider

TIMOTHY BLAIR, APRN's 4,971 claims are above the specialty average of 1,222.

Nearby Family Nurse Practitioner Providers in Montana

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

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

Frequently Asked Questions

What is TIMOTHY BLAIR, APRN's specialty?
TIMOTHY BLAIR, APRN specializes in Family Nurse Practitioner and practices in CHESTER, Montana. Credentials: APRN.
How much does TIMOTHY BLAIR, APRN prescribe under Medicare Part D?
In 2023, TIMOTHY BLAIR, APRN wrote 4,971 Medicare Part D claims totaling $347K in drug costs for 172 beneficiaries.
Where is TIMOTHY BLAIR, APRN located?
TIMOTHY BLAIR, APRN is located at 418 WEST MADISON, CHESTER, MT, 59522. Phone: (406) 759-5194.
What is TIMOTHY BLAIR, APRN's NPI number?
TIMOTHY BLAIR, APRN's National Provider Identifier (NPI) is 1891101689, issued on 07/01/2014.
Does TIMOTHY BLAIR, APRN prescribe more brand-name or generic drugs?
TIMOTHY BLAIR, APRN's prescribing is 13% brand-name and 87% generic drugs by claim count, with $271K in brand drug costs.
Does TIMOTHY BLAIR, APRN prescribe opioids?
Yes, TIMOTHY BLAIR, APRN had 134 opioid claims in 2023 with an opioid prescribing rate of 2.7%.
How many Family Nurse Practitioner providers are there in the US?
There are 209,817 Family Nurse Practitioner providers across 56 states in the US. The average Family Nurse Practitioner provider writes 1,222 Medicare Part D claims per year.
What drugs does TIMOTHY BLAIR, APRN prescribe most often?
Based on 2023 Medicare Part D data, TIMOTHY BLAIR, APRN's most frequently prescribed drugs include Potassium Chloride, Levothyroxine Sodium, Atorvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does TIMOTHY BLAIR, APRN accept Medicare?
TIMOTHY BLAIR, APRN appears in CMS Medicare data with 4,971 Part D claims and 172 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify TIMOTHY BLAIR, APRN's credentials?
TIMOTHY BLAIR, APRN's NPI is 1891101689 with credentials APRN. 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