2026 NPPES data Internal Medicine Physician NPI 1730298803 M.D.
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CATHERINE CHESTER, M.D.

Internal Medicine Physician in COEUR D ALENE, 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
2K
Medicare Part D claims · 998 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
93%
generic claims · 7% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

CATHERINE CHESTER, M.D. filed 1,601 Medicare Part D claims in 2023 as a Internal Medicine Physician in COEUR D ALENE, Idaho, prescribing 93% generic.

2K
Part D claims, 2023
93%
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.

CATHERINE CHESTER, M.D.'s Medicare Part D volume vs every U.S. prescriber

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

1,601 Top 18% higher than 82% 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%). This entry sits in this band. 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 certification likely (heuristic — not verified)

CATHERINE CHESTER, M.D. 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 CATHERINE CHESTER, M.D.?

Quality data not reported

NPI registry status

Active

Issued 08/30/2006

NPI 1730298803

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

1,601 41% vs specialty avg

2023 prescription claims

Specialty avg: 2,716

Specialty distribution in Idaho

How Internal Medicine Physician compares to other specialties among Idaho providers

Idaho providers

Internal Medicine Physician share within Idaho

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

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).

CATHERINE CHESTER, M.D. appears in the CMS NPPES registry as a Internal Medicine Physician provider holding M.D. credentials at 1919 LINCOLN WAY, COEUR D ALENE, ID, 83814, with a listed phone of (208) 625-4515. NPI 1730298803 was issued on 08/30/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what CHESTER 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 1,601 prescription claims written by this provider, covering 998 Medicare beneficiaries and totaling roughly $56K in drug spend, split 7% brand-name and 93% generic by claim count, with an opioid prescribing rate of 7.1%. 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

1919 LINCOLN WAY
COEUR D ALENE, ID 83814

Provider Details

NPI 1730298803
Specialty Internal Medicine Physician
Credentials M.D.
Gender Female
NPI Issued 08/30/2006

Hospital and facility affiliations

Facilities where CATHERINE CHESTER, M.D. 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.

KAISER FOUNDATION HEALTH PLAN OF THE NORTHWEST
HILLSBORO, OR

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 · Generic-heavy

CATHERINE CHESTER, M.D. — brand share 7.0%
Specialty average (est.)

7% brand-name claims vs 93% generic, on 1,601 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.

1,601
Total Claims
$56K
Total Drug Cost
998
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
2,800
Total Day Supply
70,344
Brand vs Generic
7% brand / 93% generic
Brand Drug Cost
$28K
Generic Drug Cost
$26K
Opioid Claims
113 (7.1% rate)
Antibiotic Claims
280

Patient Demographics

Average Patient Age
72.8 years
Avg HCC Risk Score
1.10
Gender Split
67% female / 33% male
Age Distribution
<65: 85, 65-74: 511, 75-84: 308, 85+: 94

Top Prescribed Drugs (Medicare Part D)

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

What CATHERINE CHESTER, M.D. 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
Paxlovid (Eua)
Nirmatrelvir/Ritonavir
87
Nitrofurantoin Mono-Macro
Nitrofurantoin Monohyd/M-Cryst
55
Albuterol Sulfate Hfa
Albuterol Sulfate
48
Hydrocodone-Acetaminophen
Hydrocodone/Acetaminophen
48
Cephalexin
44
Cefuroxime
Cefuroxime Axetil
41
Pantoprazole Sodium
36
Prednisone
35
Lisinopril
33
Atorvastatin 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 CATHERINE CHESTER, M.D. 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

CATHERINE CHESTER, M.D.'s 1,601 claims are below the specialty average of 2,716.

Nearby Internal Medicine Physician Providers in Idaho

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

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

Frequently Asked Questions

What is CATHERINE CHESTER, M.D.'s specialty?
CATHERINE CHESTER, M.D. specializes in Internal Medicine Physician and practices in COEUR D ALENE, Idaho. Credentials: M.D..
How much does CATHERINE CHESTER, M.D. prescribe under Medicare Part D?
In 2023, CATHERINE CHESTER, M.D. wrote 1,601 Medicare Part D claims totaling $56K in drug costs for 998 beneficiaries.
Where is CATHERINE CHESTER, M.D. located?
CATHERINE CHESTER, M.D. is located at 1919 LINCOLN WAY, COEUR D ALENE, ID, 83814. Phone: (208) 625-4515.
What is CATHERINE CHESTER, M.D.'s NPI number?
CATHERINE CHESTER, M.D.'s National Provider Identifier (NPI) is 1730298803, issued on 08/30/2006.
Does CATHERINE CHESTER, M.D. prescribe more brand-name or generic drugs?
CATHERINE CHESTER, M.D.'s prescribing is 7% brand-name and 93% generic drugs by claim count, with $28K in brand drug costs.
Does CATHERINE CHESTER, M.D. prescribe opioids?
Yes, CATHERINE CHESTER, M.D. had 113 opioid claims in 2023 with an opioid prescribing rate of 7.1%.
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 CATHERINE CHESTER, M.D. prescribe most often?
Based on 2023 Medicare Part D data, CATHERINE CHESTER, M.D.'s most frequently prescribed drugs include Paxlovid (Eua), Nitrofurantoin Mono-Macro, Albuterol Sulfate Hfa. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does CATHERINE CHESTER, M.D. accept Medicare?
CATHERINE CHESTER, M.D. appears in CMS Medicare data with 1,601 Part D claims and 998 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify CATHERINE CHESTER, M.D.'s credentials?
CATHERINE CHESTER, M.D.'s NPI is 1730298803 with credentials M.D.. 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