2026 NPPES data Family Medicine Physician NPI 1164413969 D.O.
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CATHY HOLMES, D.O.

Family Medicine Physician in LEWISTOWN, 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
19
Medicare Part D claims · 12 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
42%
generic claims · 58% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

CATHY HOLMES, D.O. filed 19 Medicare Part D claims in 2023 as a Family Medicine Physician in LEWISTOWN, Montana, prescribing 42% generic.

19
Part D claims, 2023
42%
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.

CATHY HOLMES, D.O.'s Medicare Part D volume vs every U.S. prescriber

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

19 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

Board-eligible specialty (heuristic — not verified)

CATHY HOLMES, D.O. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about CATHY HOLMES, D.O.?

Quality data not reported

NPI registry status

Active

Issued 10/31/2005

NPI 1164413969

Primary specialty

Family Medicine Physician

High-volume

147,640 US NPIs in this specialty

Medicare Part D claims

19 99% vs specialty avg

2023 prescription claims

Specialty avg: 3,418

Specialty distribution in Montana

How Family Medicine Physician compares to other specialties among Montana providers

Montana providers

Family Medicine Physician share within Montana

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

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).

CATHY HOLMES, D.O. appears in the CMS NPPES registry as a Family Medicine Physician provider holding D.O. credentials at 408 WENDELL AVE, LEWISTOWN, MT, 59457, with a listed phone of (406) 535-1502. NPI 1164413969 was issued on 10/31/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what HOLMES 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 19 prescription claims written by this provider, covering 12 Medicare beneficiaries and totaling roughly $3K in drug spend, split 58% brand-name and 42% 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.

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

408 WENDELL AVE
LEWISTOWN, MT 59457

Provider Details

NPI 1164413969
Specialty Family Medicine Physician
Credentials D.O.
Gender Female
NPI Issued 10/31/2005

Brand vs generic prescribing mix · Brand-heavy

CATHY HOLMES, D.O. — brand share 58.0%
Specialty average (est.)

58% brand-name claims vs 42% generic, on 19 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.

19
Total Claims
$3K
Total Drug Cost
12
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
19
Total Day Supply
216
Brand vs Generic
58% brand / 42% generic
Brand Drug Cost
$3K

Patient Demographics

Average Patient Age
73.3 years
Avg HCC Risk Score
1.29

Family Medicine Physician Overview

How CATHY HOLMES, 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

CATHY HOLMES, D.O.'s 19 claims are below the specialty average of 3,418.

Nearby Family Medicine Physician Providers in Montana

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

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

Frequently Asked Questions

What is CATHY HOLMES, D.O.'s specialty?
CATHY HOLMES, D.O. specializes in Family Medicine Physician and practices in LEWISTOWN, Montana. Credentials: D.O..
How much does CATHY HOLMES, D.O. prescribe under Medicare Part D?
In 2023, CATHY HOLMES, D.O. wrote 19 Medicare Part D claims totaling $3K in drug costs for 12 beneficiaries.
Where is CATHY HOLMES, D.O. located?
CATHY HOLMES, D.O. is located at 408 WENDELL AVE, LEWISTOWN, MT, 59457. Phone: (406) 535-1502.
What is CATHY HOLMES, D.O.'s NPI number?
CATHY HOLMES, D.O.'s National Provider Identifier (NPI) is 1164413969, issued on 10/31/2005.
Does CATHY HOLMES, D.O. prescribe more brand-name or generic drugs?
CATHY HOLMES, D.O.'s prescribing is 58% brand-name and 42% generic drugs by claim count, with $3K in brand drug costs.
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.
Does CATHY HOLMES, D.O. accept Medicare?
CATHY HOLMES, D.O. appears in CMS Medicare data with 19 Part D claims and 12 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify CATHY HOLMES, D.O.'s credentials?
CATHY HOLMES, D.O.'s NPI is 1164413969 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