NPI registry status
Active
2026 NPPES data Otolaryngology Physician NPI 1942473921 M.D.
Verify on CMS → Kathleen Macisaac, M.D.
Otolaryngology Physician in Lexington, Virginia.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 10,893 in Otolaryngology Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
216
Medicare Part D claims · 47 beneficiaries · Otolaryngology Physician avg: 509
Generic prescribing
78%
generic claims · 13% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Kathleen Macisaac, M.D. filed 216 Medicare Part D claims in 2023 as an Otolaryngology Physician in Lexington, Virginia, prescribing 78% generic.
- 216
- Part D claims, 2023
- 78%
- 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.
Kathleen Macisaac, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
216 49th percentile higher than 49% of 1,370,886 prescribers
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)
Kathleen Macisaac, M.D. 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 Kathleen Macisaac, M.D.?
Quality data not reportedPrimary specialty
Otolaryngology Physician
Medicare Part D claims
216 58% vs specialty avg
Specialty distribution in Virginia
How Otolaryngology Physician compares to other specialties among Virginia providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Otolaryngology Physician. Verify directly:
How MIPS and board certification work
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).
Kathleen Macisaac, M.D. appears in the CMS NPPES registry as an Otolaryngology Physician provider holding M.D. credentials at 129 S RANDOLPH ST UNIT 6, Lexington, VA, 24450, with a listed phone of (540) 527-7323. NPI 1942473921 was issued on 04/10/2008.
Medicare Part D records for calendar year 2023 show 216 prescription claims written by this provider, covering 47 Medicare beneficiaries and totaling roughly $24K in drug spend, split 13% brand-name and 78% generic by claim count.
Otolaryngology Physician is a mid-sized specialty nationwide, with 10,893 enrolled providers across 54 states and an average of 509 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
Provider Details
| NPI | 1942473921 |
|---|---|
| Specialty | Otolaryngology Physician |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 04/10/2008 |
Brand vs generic prescribing mix · Typical
Kathleen Macisaac, M.D. - brand share 13.0%
Otolaryngology Physician average
13% brand-name claims vs 78% generic, on 216 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.
216
Total Claims
$24K
Total Drug Cost
47
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 473
- Total Day Supply
- 13,816
- Brand vs Generic
- 13% brand / 78% generic
- Brand Drug Cost
- $16K
- Generic Drug Cost
- $5K
Patient Demographics
- Average Patient Age
- 70.1 years
- Avg HCC Risk Score
- 0.65
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| Liothyronine Sodium | 28 |
| Levothyroxine Sodium | 13 |
| Armour Thyroid "Thyroid | N/A |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Otolaryngology Physician Overview
How Kathleen Macisaac, M.D. fits within the Otolaryngology Physician landscape nationally.
10,893
Otolaryngology Physician Providers in US
54
States with Otolaryngology Physician
509
Avg Claims per Provider
Kathleen Macisaac, M.D.'s 216 claims are below the specialty average of 509.
Nearby Otolaryngology Physician Providers in Virginia
Other clinicians with the same primary specialty enrolled in Virginia, drawn from the same CMS NPPES roster as Macisaac.
Dr. Jeffrey Aldinger
MD
Hampton, VA
Dr. Alidad Arabshahi
MD
Mc Lean, VA
Dr. Michael Armstrong
MD
Richmond, VA
Dr. Tokunbo Ayeni
MD
Hampton, VA
Dr. Roya Azadarmaki
M.D.
Leesburg, VA
Compare Otolaryngology 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 Virginia medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Otolaryngology 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.
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Frequently Asked Questions
What is Kathleen Macisaac, M.D.'s specialty? ▼
Kathleen Macisaac, M.D. specializes in Otolaryngology Physician and practices in Lexington, Virginia. Credentials: M.D..
How much does Kathleen Macisaac, M.D. prescribe under Medicare Part D? ▼
In 2023, Kathleen Macisaac, M.D. wrote 216 Medicare Part D claims totaling $24K in drug costs for 47 beneficiaries.
Where is Kathleen Macisaac, M.D. located? ▼
Kathleen Macisaac, M.D. is located at 129 S RANDOLPH ST UNIT 6, Lexington, VA, 24450. Phone: (540) 527-7323.
What is Kathleen Macisaac, M.D.'s NPI number? ▼
Kathleen Macisaac, M.D.'s National Provider Identifier (NPI) is 1942473921, issued on 04/10/2008.
Does Kathleen Macisaac, M.D. prescribe more brand-name or generic drugs? ▼
Kathleen Macisaac, M.D.'s prescribing is 13% brand-name and 78% generic drugs by claim count, with $16K in brand drug costs.
How many Otolaryngology Physician providers are there in the US? ▼
There are 10,893 Otolaryngology Physician providers across 54 states in the US. The average Otolaryngology Physician provider writes 509 Medicare Part D claims per year.
What drugs does Kathleen Macisaac, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Kathleen Macisaac, M.D.'s most frequently prescribed drugs include Liothyronine Sodium, Levothyroxine Sodium, Armour Thyroid. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Kathleen Macisaac, M.D. accept Medicare? ▼
Kathleen Macisaac, M.D. appears in CMS Medicare data with 216 Part D claims and 47 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Kathleen Macisaac, M.D.'s credentials? ▼
Kathleen Macisaac, M.D.'s NPI is 1942473921 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
View source datasets and methodology notes
- 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
Compiled from official public sources by the PlainDoctor editorial team.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.