2026 NPPES data Internal Medicine Physician NPI 1164479374 DO
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LOETTA HORSWILL-WOODS, DO

Internal Medicine Physician in WASILLA, Alaska. 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
1K
Medicare Part D claims · 91 beneficiaries · Internal Medicine Physician avg: 3K
MIPS score
91.9793/100
▲ 9 pts above national avg 83.1 · [object Object]

What the federal data shows

LOETTA HORSWILL-WOODS, DO reported a CMS MIPS final score of 91.9793/100 — above the 83.1 national average — and filed 1,135 Medicare Part D claims in 2023.

91.9793/100
MIPS score · +9 vs avg
1K
Part D claims, 2023
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.

LOETTA HORSWILL-WOODS, DO's MIPS score vs every scored U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023 — the federal quality measure

92 Top 37% higher than 63% of 477,587 scored providers

0–10: 8,684 scored providers (2%). Below this entry. 10–20: 3,008 scored providers (1%). Below this entry. 20–30: 3,069 scored providers (1%). Below this entry. 30–40: 2,746 scored providers (1%). Below this entry. 40–50: 2,928 scored providers (1%). Below this entry. 50–60: 5,882 scored providers (1%). Below this entry. 60–70: 13,906 scored providers (3%). Below this entry. 70–80: 118,074 scored providers (25%). Below this entry. 80–90: 129,887 scored providers (27%). Below this entry. 90–100: 189,403 scored providers (40%). This entry sits in this band. This provider 0 100 every MIPS-scored clinician, bucketed by value

Each bar is a band; taller bars hold more scored providers. 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 Merit-based Incentive Payment System (MIPS) · 2023

Board certification likely (heuristic — not verified)

LOETTA HORSWILL-WOODS, DO practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting — 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 LOETTA HORSWILL-WOODS, DO?

High performer (top quartile)

NPI registry status

Active

Issued 05/31/2006

NPI 1164479374

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

1,135 58% vs specialty avg

2023 prescription claims

Specialty avg: 2,716

MIPS final score

91.9793/100 8.8793% pts

Exceptional band

vs 83.1 national avg

Specialty distribution in Alaska

How Internal Medicine Physician compares to other specialties among Alaska providers

Alaska providers

Internal Medicine Physician share within Alaska

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

Medicare quality performance — MIPS

LOETTA HORSWILL-WOODS, DO's 2023 MIPS final score plotted against the Internal Medicine Physician national average

High performer (top quartile)
MIPS Final Score
91.9793/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Internal Medicine Physician) — 91.9793/100 vs national avg 83.1

0%100%National avg83%92%
MIPS final score (Internal Medicine Physician) — 91.9793/100 vs national avg 83.1

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).

LOETTA HORSWILL-WOODS, DO appears in the CMS NPPES registry as a Internal Medicine Physician provider holding DO credentials at 3719 E MERIDIAN LOOP, WASILLA, AK, 99654, with a listed phone of (907) 373-5940. NPI 1164479374 was issued on 05/31/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what HORSWILL-WOODS 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 1,135 prescription claims written by this provider, covering 91 Medicare beneficiaries and totaling roughly $181K 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. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 91.9793/100 for the 2023 performance year (Quality 91.3272, Cost 73.5043), compared with the national average of 83.1.

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

3719 E MERIDIAN LOOP
WASILLA, AK 99654

Provider Details

NPI 1164479374
Specialty Internal Medicine Physician
Credentials DO
Gender Female
NPI Issued 05/31/2006

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

91.9793
Final Score
Avg: 83.1
91.3272
Quality
73.5043
Cost

Reporting: Individual

Medicare Part D Prescribing Data

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

1,135
Total Claims
$181K
Total Drug Cost
91
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
2,283
Total Day Supply
63,974
Generic Drug Cost
$27K

Patient Demographics

Average Patient Age
73.7 years
Avg HCC Risk Score
1.57
Gender Split
75% female / 25% male

Top Prescribed Drugs (Medicare Part D)

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

What LOETTA HORSWILL-WOODS, DO 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
Omeprazole
76
Atorvastatin Calcium
68
Losartan Potassium
46
Citalopram Hbr
Citalopram Hydrobromide
43
Amlodipine Besylate
40
Levothyroxine Sodium
35
Metoprolol Succinate
35
Fenofibrate
Fenofibrate Nanocrystallized
31
Lisinopril-Hydrochlorothiazide
Lisinopril/Hydrochlorothiazide
31
Rosuvastatin Calcium
31

* 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 LOETTA HORSWILL-WOODS, DO 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

LOETTA HORSWILL-WOODS, DO's 1,135 claims are below the specialty average of 2,716.

Nearby Internal Medicine Physician Providers in Alaska

Other clinicians with the same primary specialty enrolled in Alaska, drawn from the same CMS NPPES roster as HORSWILL-WOODS.

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

Frequently Asked Questions

What is LOETTA HORSWILL-WOODS, DO's specialty?
LOETTA HORSWILL-WOODS, DO specializes in Internal Medicine Physician and practices in WASILLA, Alaska. Credentials: DO.
How much does LOETTA HORSWILL-WOODS, DO prescribe under Medicare Part D?
In 2023, LOETTA HORSWILL-WOODS, DO wrote 1,135 Medicare Part D claims totaling $181K in drug costs for 91 beneficiaries.
What is LOETTA HORSWILL-WOODS, DO's Medicare quality score?
LOETTA HORSWILL-WOODS, DO has a CMS MIPS Final Score of 91.9793/100 (Quality: 91.3272, Cost: 73.5043). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is LOETTA HORSWILL-WOODS, DO located?
LOETTA HORSWILL-WOODS, DO is located at 3719 E MERIDIAN LOOP, WASILLA, AK, 99654. Phone: (907) 373-5940.
What is LOETTA HORSWILL-WOODS, DO's NPI number?
LOETTA HORSWILL-WOODS, DO's National Provider Identifier (NPI) is 1164479374, issued on 05/31/2006.
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 LOETTA HORSWILL-WOODS, DO prescribe most often?
Based on 2023 Medicare Part D data, LOETTA HORSWILL-WOODS, DO's most frequently prescribed drugs include Omeprazole, Atorvastatin Calcium, Losartan Potassium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does LOETTA HORSWILL-WOODS, DO accept Medicare?
LOETTA HORSWILL-WOODS, DO appears in CMS Medicare data with 1,135 Part D claims and 91 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify LOETTA HORSWILL-WOODS, DO's credentials?
LOETTA HORSWILL-WOODS, DO's NPI is 1164479374 with credentials DO. 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.
Quality Performance
CMS Merit-based Incentive Payment System (MIPS) — 2023 performance year.
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