NPI registry status
Active
2026 NPPES data Primary Care Nurse Practitioner NPI 1184181380 AGNP
Verify on CMS → Kathryn Oas, AGNP
Primary Care Nurse Practitioner in Cambridge, Massachusetts.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 10,179 in Primary Care Nurse Practitioner, 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
728
Medicare Part D claims · 216 beneficiaries · Primary Care Nurse Practitioner avg: 1K
Industry payments
$26.71
1 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Kathryn Oas, AGNP filed 728 Medicare Part D claims in 2023 as a Primary Care Nurse Practitioner in Cambridge, Massachusetts.
- 728
- Part D claims, 2023
- $26.71
- 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.
Kathryn Oas, AGNP's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
728 Top 29% higher than 71% 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
What does the federal data show about Kathryn Oas, AGNP?
Quality data not reportedPrimary specialty
Primary Care Nurse Practitioner
Medicare Part D claims
728 47% vs specialty avg
Specialty distribution in Massachusetts
How Primary Care Nurse Practitioner compares to other specialties among Massachusetts 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 Primary Care Nurse Practitioner. 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).
Kathryn Oas, AGNP appears in the CMS NPPES registry as a Primary Care Nurse Practitioner provider holding AGNP credentials at 94 HAMPSHIRE ST UNIT A, Cambridge, MA, 02139, with a listed phone of (801) 602-5524. NPI 1184181380 was issued on 02/23/2019.
Medicare Part D records for calendar year 2023 show 728 prescription claims written by this provider, covering 216 Medicare beneficiaries and totaling roughly $70K in drug spend, with an opioid prescribing rate of 4.0%.
Primary Care Nurse Practitioner is a mid-sized specialty nationwide, with 10,179 enrolled providers across 54 states and an average of 1,363 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 | 1184181380 |
|---|---|
| Specialty | Primary Care Nurse Practitioner |
| Credentials | AGNP |
| Gender | Female |
| NPI Issued | 02/23/2019 |
Hospital and facility affiliations
Facilities where Kathryn Oas, AGNP 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.
North Shore Community Health Inc
Salem, MA
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
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 Kathryn Oas, AGNP. Source: openpaymentsdata.cms.gov.
Total received
$27
Largest payer
Gilead Sciences, 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.
License & disciplinary context - Massachusetts BORIM 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~38K Massachusetts medical licensees in 2023 - they are NOT specific to Kathryn Oas, AGNP. To verify Kathryn Oas, AGNP's current license status, search the BORIM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
80
Total board actions, Massachusetts 2023
Across 78 cases
2.11
Actions per 1,000 licensees
Massachusetts statewide rate
probation
Most common action type
29 cases
BORIM publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Massachusetts disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
728
Total Claims
$70K
Total Drug Cost
216
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,342
- Total Day Supply
- 38,359
- Generic Drug Cost
- $17K
- Opioid Claims
- 29 (4.0% rate)
- Antibiotic Claims
- 17
Patient Demographics
- Average Patient Age
- 67.7 years
- Avg HCC Risk Score
- 1.40
- Gender Split
- 53% female / 47% male
- Age Distribution
- <65: 60, 65-74: 97, 75-84: 43, 85+: 16
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Kathryn Oas, AGNP prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
77 claims
- Lisinopril
Lisinopril
37 claims
- Gabapentin
Gabapentin
35 claims
- Amlodipine Besylate 27
Amlodipine Besylate
27 claims
- Metformin Hcl 24
Metformin Hcl
24 claims
- Omeprazole 24
Omeprazole
24 claims
- Buprenorphine-Nalo… 22
Buprenorphine-Naloxone
22 claims
- Hydrochlorothiazide 22
Hydrochlorothiazide
22 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 77 |
| Lisinopril | 37 |
| Gabapentin | 35 |
| Amlodipine Besylate | 27 |
| Metformin Hcl | 24 |
| Omeprazole | 24 |
| Buprenorphine-Naloxone Buprenorphine Hcl/Naloxone Hcl | 22 |
| Hydrochlorothiazide | 22 |
| Metoprolol Succinate | 20 |
| Januvia Sitagliptin Phosphate | 19 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Primary Care Nurse Practitioner Overview
How Kathryn Oas, AGNP fits within the Primary Care Nurse Practitioner landscape nationally.
10,179
Primary Care Nurse Practitioner Providers in US
54
States with Primary Care Nurse Practitioner
1,363
Avg Claims per Provider
Kathryn Oas, AGNP's 728 claims are below the specialty average of 1,363.
Nearby Primary Care Nurse Practitioner Providers in Massachusetts
Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as Oas.
Dr. Joshua Abrahams
AGPCNP-BC
Foxborough, MA
Dr. Laura Aierstuck
NP
Easthampton, MA
Dr. Deidre Alessio
APRN
Somerville, MA
Dr. Benjamin Alfred
NP
Worcester, MA
Dr. Jennifer Allard
FNP-C
South Hadley, MA
Compare Primary Care Nurse Practitioner 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 Massachusetts medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Primary Care Nurse Practitioner 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.
Healthcare Guides
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Medical Specialties Explained
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Understanding Medicare Claims Data
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Frequently Asked Questions
What is Kathryn Oas, AGNP's specialty? ▼
Kathryn Oas, AGNP specializes in Primary Care Nurse Practitioner and practices in Cambridge, Massachusetts. Credentials: AGNP.
How much does Kathryn Oas, AGNP prescribe under Medicare Part D? ▼
In 2023, Kathryn Oas, AGNP wrote 728 Medicare Part D claims totaling $70K in drug costs for 216 beneficiaries.
Where is Kathryn Oas, AGNP located? ▼
Kathryn Oas, AGNP is located at 94 HAMPSHIRE ST UNIT A, Cambridge, MA, 02139. Phone: (801) 602-5524.
What is Kathryn Oas, AGNP's NPI number? ▼
Kathryn Oas, AGNP's National Provider Identifier (NPI) is 1184181380, issued on 02/23/2019.
Does Kathryn Oas, AGNP prescribe opioids? ▼
Yes, Kathryn Oas, AGNP had 29 opioid claims in 2023 with an opioid prescribing rate of 4.0%.
How many Primary Care Nurse Practitioner providers are there in the US? ▼
There are 10,179 Primary Care Nurse Practitioner providers across 54 states in the US. The average Primary Care Nurse Practitioner provider writes 1,363 Medicare Part D claims per year.
What drugs does Kathryn Oas, AGNP prescribe most often? ▼
Based on 2023 Medicare Part D data, Kathryn Oas, AGNP's most frequently prescribed drugs include Atorvastatin Calcium, Lisinopril, Gabapentin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Kathryn Oas, AGNP accept Medicare? ▼
Kathryn Oas, AGNP appears in CMS Medicare data with 728 Part D claims and 216 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Kathryn Oas, AGNP's credentials? ▼
Kathryn Oas, AGNP's NPI is 1184181380 with credentials AGNP. 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.