NPI registry status
Active
2026 NPPES data Nurse Practitioner NPI 1942834858
Verify on CMS → Olga McLellan
Nurse Practitioner in Charlestown, 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 87,700 in 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
1K
Medicare Part D claims · 183 beneficiaries · Nurse Practitioner avg: 1K
Generic prescribing
87%
generic claims · 12% 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
Olga McLellan filed 1,020 Medicare Part D claims in 2023 as a Nurse Practitioner in Charlestown, Massachusetts, prescribing 87% generic.
- 1K
- Part D claims, 2023
- 87%
- 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.
Olga McLellan's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
1,020 Top 24% higher than 76% 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 Olga McLellan?
Quality data not reportedPrimary specialty
Nurse Practitioner
Medicare Part D claims
1,020 6% vs specialty avg
Specialty distribution in Massachusetts
How 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 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).
Olga McLellan appears in the CMS NPPES registry as a Nurse Practitioner provider at 15 TUFTS ST, Charlestown, MA, 02129, with a listed phone of (857) 238-1100. NPI 1942834858 was issued on 02/29/2020.
Medicare Part D records for calendar year 2023 show 1,020 prescription claims written by this provider, covering 183 Medicare beneficiaries and totaling roughly $121K in drug spend, split 12% brand-name and 87% generic by claim count, with an opioid prescribing rate of 2.1%.
Nurse Practitioner is a high-volume specialty nationwide, with 87,700 enrolled providers across 56 states and an average of 1,084 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 | 1942834858 |
|---|---|
| Specialty | Nurse Practitioner |
| Gender | Female |
| NPI Issued | 02/29/2020 |
Hospital and facility affiliations
Facilities where Olga McLellan 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 End Community Health Committee, Inc.
Boston, 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).
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 Olga McLellan. To verify Olga McLellan'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.
Brand vs generic prescribing mix · Typical
Olga McLellan - brand share 12.0%
Nurse Practitioner average
12% brand-name claims vs 87% generic, on 1,020 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.
1,020
Total Claims
$121K
Total Drug Cost
183
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,302
- Total Day Supply
- 66,459
- Brand vs Generic
- 12% brand / 87% generic
- Brand Drug Cost
- $98K
- Generic Drug Cost
- $22K
- Opioid Claims
- 21 (2.1% rate)
- Antibiotic Claims
- 16
Patient Demographics
- Average Patient Age
- 68.3 years
- Avg HCC Risk Score
- 1.20
- Gender Split
- 66% female / 34% male
- Age Distribution
- <65: 48, 65-74: 75, 75-84: 48, 85+: 12
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Olga McLellan prescribes most
Top Medicare Part D drugs by claim count, 2023
- Rosuvastatin Calcium
Rosuvastatin Calcium
58 claims
- Lisinopril
Lisinopril
54 claims
- Metformin Hcl
Metformin Hcl
53 claims
- Gabapentin
Gabapentin
41 claims
- Amlodipine Besylate
Amlodipine Besylate
39 claims
- Atorvastatin Calcium
Atorvastatin Calcium
36 claims
- Levothyroxine Sodium
Levothyroxine Sodium
34 claims
- Hydrochlorothiazide
Hydrochlorothiazide
31 claims
| Drug | Claims |
|---|---|
| Rosuvastatin Calcium | 58 |
| Lisinopril | 54 |
| Metformin Hcl | 53 |
| Gabapentin | 41 |
| Amlodipine Besylate | 39 |
| Atorvastatin Calcium | 36 |
| Levothyroxine Sodium | 34 |
| Hydrochlorothiazide | 31 |
| Fluticasone Propionate | 30 |
| Omeprazole | 27 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Nurse Practitioner Overview
How Olga McLellan fits within the Nurse Practitioner landscape nationally.
87,700
Nurse Practitioner Providers in US
56
States with Nurse Practitioner
1,084
Avg Claims per Provider
Olga McLellan's 1,020 claims are below the specialty average of 1,084.
Nearby Nurse Practitioner Providers in Massachusetts
Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as McLellan.
Dr. Carolyn Abbanat Villafane
NP
Boston, MA
Dr. Lisa Abbondanza
CNP
Franklin, MA
Fatima Abdalla
Melrose, MA
Dr. Esayas Abraham
NP
Chelsea, MA
Alissa Abrahamson
Framingham, MA
Compare 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 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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Frequently Asked Questions
What is Olga McLellan's specialty? ▼
Olga McLellan specializes in Nurse Practitioner and practices in Charlestown, Massachusetts.
How much does Olga McLellan prescribe under Medicare Part D? ▼
In 2023, Olga McLellan wrote 1,020 Medicare Part D claims totaling $121K in drug costs for 183 beneficiaries.
Where is Olga McLellan located? ▼
Olga McLellan is located at 15 TUFTS ST, Charlestown, MA, 02129. Phone: (857) 238-1100.
What is Olga McLellan's NPI number? ▼
Olga McLellan's National Provider Identifier (NPI) is 1942834858, issued on 02/29/2020.
Does Olga McLellan prescribe more brand-name or generic drugs? ▼
Olga McLellan's prescribing is 12% brand-name and 87% generic drugs by claim count, with $98K in brand drug costs.
Does Olga McLellan prescribe opioids? ▼
Yes, Olga McLellan had 21 opioid claims in 2023 with an opioid prescribing rate of 2.1%.
How many Nurse Practitioner providers are there in the US? ▼
There are 87,700 Nurse Practitioner providers across 56 states in the US. The average Nurse Practitioner provider writes 1,084 Medicare Part D claims per year.
What drugs does Olga McLellan prescribe most often? ▼
Based on 2023 Medicare Part D data, Olga McLellan's most frequently prescribed drugs include Rosuvastatin Calcium, Lisinopril, Metformin Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Olga McLellan accept Medicare? ▼
Olga McLellan appears in CMS Medicare data with 1,020 Part D claims and 183 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Olga McLellan's credentials? ▼
Olga McLellan's NPI is 1942834858. 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.