2026 NPPES data Internal Medicine Physician NPI 1386809101 MD
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SARAH FAABORG, MD

Internal Medicine Physician in MISSOULA, 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
11K
Medicare Part D claims · 669 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
90%
generic claims · 10% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: SARAH FAABORG, MD is a Internal Medicine Physician ([object Object]) practicing in MISSOULA, Montana with a Medicare Part D prescribing footprint of 11K claims across 669 beneficiaries — 10% brand-name prescribing .

What stands out: SARAH FAABORG, MD filed 10,924 Medicare Part D claims in 2023 across MISSOULA, Montana. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

SARAH FAABORG, MD 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).

SARAH FAABORG, MD at a glance

Quality data not reported

NPI registry status

Active

Issued 07/21/2008

NPI 1386809101

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

10,924 302% vs specialty avg

2023 prescription claims

Specialty avg: 2,716

Specialty distribution in Montana

How Internal Medicine Physician compares to other specialties among Montana providers

Montana providers

Internal Medicine Physician share within Montana

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

Specialty board-certification context

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

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

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

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

SARAH FAABORG, MD is a Internal Medicine Physician provider practicing in MISSOULA, Montana, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1386809101. 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.

SARAH FAABORG, MD appears in the CMS NPPES registry as a Internal Medicine Physician provider holding MD credentials at 323 E FRONT ST, MISSOULA, MT, 59802, with a listed phone of (406) 317-4800. NPI 1386809101 was issued on 07/21/2008. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what FAABORG 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 10,924 prescription claims written by this provider, covering 669 Medicare beneficiaries and totaling roughly $968K in drug spend, split 10% brand-name and 90% generic by claim count, with an opioid prescribing rate of 6.4%. 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.

Internal Medicine Physician is a high-volume specialty nationwide, with 172,858 enrolled providers across 56 states and an average of 2,716 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

323 E FRONT ST
MISSOULA, MT 59802

Provider Details

NPI 1386809101
Specialty Internal Medicine Physician
Credentials MD
Gender Female
NPI Issued 07/21/2008

Hospital and facility affiliations

Facilities where SARAH FAABORG, MD 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.

MOUNTAIN INTERNAL MEDICINE, PLLC
MISSOULA, 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

SARAH FAABORG, MD — brand share 10.0%
Specialty average (est.)

10% brand-name claims vs 90% generic, on 10,924 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.

10,924
Total Claims
$968K
Total Drug Cost
669
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
22,186
Total Day Supply
639,514
Brand vs Generic
10% brand / 90% generic
Brand Drug Cost
$738K
Generic Drug Cost
$223K
Opioid Claims
700 (6.4% rate)
Antibiotic Claims
206

Patient Demographics

Average Patient Age
71.7 years
Avg HCC Risk Score
0.96
Gender Split
79% female / 21% male
Age Distribution
<65: 74, 65-74: 337, 75-84: 215, 85+: 43

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Levothyroxine Sodium
623
Atorvastatin Calcium
554
Lisinopril
469
Omeprazole
349
Amlodipine Besylate
322
Trazodone Hcl
228
Losartan Potassium
218
Hydrocodone-Acetaminophen
Hydrocodone/Acetaminophen
217
Gabapentin
208
Simvastatin
185

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

Internal Medicine Physician Overview

How SARAH FAABORG, MD fits within the Internal Medicine Physician landscape nationally.

172,858
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider

SARAH FAABORG, MD's 10,924 claims are above the specialty average of 2,716.

Nearby Internal Medicine Physician Providers in Montana

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

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

Frequently Asked Questions

What is SARAH FAABORG, MD's specialty?
SARAH FAABORG, MD specializes in Internal Medicine Physician and practices in MISSOULA, Montana. Credentials: MD.
How much does SARAH FAABORG, MD prescribe under Medicare Part D?
In 2023, SARAH FAABORG, MD wrote 10,924 Medicare Part D claims totaling $968K in drug costs for 669 beneficiaries.
Where is SARAH FAABORG, MD located?
SARAH FAABORG, MD is located at 323 E FRONT ST, MISSOULA, MT, 59802. Phone: (406) 317-4800.
What is SARAH FAABORG, MD's NPI number?
SARAH FAABORG, MD's National Provider Identifier (NPI) is 1386809101, issued on 07/21/2008.
Does SARAH FAABORG, MD prescribe more brand-name or generic drugs?
SARAH FAABORG, MD's prescribing is 10% brand-name and 90% generic drugs by claim count, with $738K in brand drug costs.
Does SARAH FAABORG, MD prescribe opioids?
Yes, SARAH FAABORG, MD had 700 opioid claims in 2023 with an opioid prescribing rate of 6.4%.
How many Internal Medicine Physician providers are there in the US?
There are 172,858 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does SARAH FAABORG, MD prescribe most often?
Based on 2023 Medicare Part D data, SARAH FAABORG, MD's most frequently prescribed drugs include Levothyroxine Sodium, Atorvastatin Calcium, Lisinopril. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does SARAH FAABORG, MD accept Medicare?
SARAH FAABORG, MD appears in CMS Medicare data with 10,924 Part D claims and 669 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify SARAH FAABORG, MD's credentials?
SARAH FAABORG, MD's NPI is 1386809101 with credentials MD. 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