2026 NPPES data Family Medicine Physician NPI 1831711845 DO
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Catherine Lok, DO

Family Medicine Physician in Woodfin, North Carolina. 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 · 145 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
88%
generic claims · 12% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$47.45
1 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

Catherine Lok, DO filed 1,479 Medicare Part D claims in 2023 as a Family Medicine Physician in Woodfin, North Carolina, prescribing 88% generic.

1K
Part D claims, 2023
88%
generic prescribing
$47.45
industry payments (Sunshine Act)

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 Lok, DO's Medicare Part D volume vs every U.S. prescriber

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

1,479 Top 20% higher than 80% 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%). This entry sits in this band. 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)

Catherine Lok, DO 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 Catherine Lok, DO?

Quality data not reported

NPI registry status

Active

Issued 05/13/2020

NPI 1831711845

Primary specialty

Family Medicine Physician

High-volume

147,640 US NPIs in this specialty

Medicare Part D claims

1,479 57% vs specialty avg

2023 prescription claims

Specialty avg: 3,418

Specialty distribution in North Carolina

How Family Medicine Physician compares to other specialties among North Carolina providers

North Carolina providers

Family Medicine Physician share within North Carolina

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

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).

Catherine Lok, DO appears in the CMS NPPES registry as a Family Medicine Physician provider holding DO credentials at 2 WEAVERVILLE RD STE 201, Woodfin, NC, 28804, with a listed phone of (828) 808-8091. NPI 1831711845 was issued on 05/13/2020. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Lok 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 1,479 prescription claims written by this provider, covering 145 Medicare beneficiaries and totaling roughly $169K in drug spend, split 12% brand-name and 88% generic by claim count, with an opioid prescribing rate of 1.4%. 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.

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

2 WEAVERVILLE RD STE 201
Woodfin, NC 28804

Provider Details

NPI 1831711845
Specialty Family Medicine Physician
Credentials DO
Gender Female
NPI Issued 05/13/2020

Industry payments received (2024) — CMS Open Payments transparency data

The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Catherine Lok, DO. Source: openpaymentsdata.cms.gov.

Total received

$47

Largest payer

Novo Nordisk Inc

Most common payment type

Food and Beverage

Industry payments are not necessarily indicators of bias — they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.

Brand vs generic prescribing mix · Typical

Catherine Lok, DO — brand share 12.0%
Specialty average (est.)

12% brand-name claims vs 88% generic, on 1,479 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.

1,479
Total Claims
$169K
Total Drug Cost
145
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
2,996
Total Day Supply
86,391
Brand vs Generic
12% brand / 88% generic
Brand Drug Cost
$141K
Generic Drug Cost
$27K
Opioid Claims
21 (1.4% rate)

Patient Demographics

Average Patient Age
67.1 years
Avg HCC Risk Score
1.70
Gender Split
50% female / 50% male
Age Distribution
<65: 46, 65-74: 56, 75-84: 30, 85+: 13

Top Prescribed Drugs (Medicare Part D)

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

What Catherine Lok, 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
Atorvastatin Calcium
134
Lisinopril
111
Pantoprazole Sodium
60
Gabapentin
54
Metformin Hcl
49
Albuterol Sulfate Hfa
Albuterol Sulfate
48
Amlodipine Besylate
42
Fluoxetine Hcl
34
Losartan Potassium
34
Furosemide
33

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

Family Medicine Physician Overview

How Catherine Lok, DO 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

Catherine Lok, DO's 1,479 claims are below the specialty average of 3,418.

Nearby Family Medicine Physician Providers in North Carolina

Other clinicians with the same primary specialty enrolled in North Carolina, drawn from the same CMS NPPES roster as Lok.

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

Before you book an appointment

Use this federal record as your verification checklist, not as a recommendation.

  • Confirm the NPI record is current in the official CMS registry — providers update their own NPPES details, and moves can lag. Verify this NPI
  • Check the active license and any disciplinary history with the North Carolina medical board — federal registration is not a license check. Credential verification guide
  • Weigh a second option: compare this provider with a nearby Family Medicine Physician peer on Medicare volume and prescribing patterns. Compare providers

Medicare Part D and MIPS figures describe practice patterns in federal programs only — they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.

Frequently Asked Questions

What is Catherine Lok, DO's specialty?
Catherine Lok, DO specializes in Family Medicine Physician and practices in Woodfin, North Carolina. Credentials: DO.
How much does Catherine Lok, DO prescribe under Medicare Part D?
In 2023, Catherine Lok, DO wrote 1,479 Medicare Part D claims totaling $169K in drug costs for 145 beneficiaries.
Where is Catherine Lok, DO located?
Catherine Lok, DO is located at 2 WEAVERVILLE RD STE 201, Woodfin, NC, 28804. Phone: (828) 808-8091.
What is Catherine Lok, DO's NPI number?
Catherine Lok, DO's National Provider Identifier (NPI) is 1831711845, issued on 05/13/2020.
Does Catherine Lok, DO prescribe more brand-name or generic drugs?
Catherine Lok, DO's prescribing is 12% brand-name and 88% generic drugs by claim count, with $141K in brand drug costs.
Does Catherine Lok, DO prescribe opioids?
Yes, Catherine Lok, DO had 21 opioid claims in 2023 with an opioid prescribing rate of 1.4%.
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.
What drugs does Catherine Lok, DO prescribe most often?
Based on 2023 Medicare Part D data, Catherine Lok, DO's most frequently prescribed drugs include Atorvastatin Calcium, Lisinopril, Pantoprazole Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Catherine Lok, DO accept Medicare?
Catherine Lok, DO appears in CMS Medicare data with 1,479 Part D claims and 145 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Catherine Lok, DO's credentials?
Catherine Lok, DO's NPI is 1831711845 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.
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