NPI registry status
Active
2026 NPPES data Oncology Registered Nurse NPI 1861620155 RN MSN APN
Verify on CMS → Mary Granholm, RN MSN APN
Oncology Registered Nurse in Hackensack, New Jersey.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 883 in Oncology Registered Nurse, 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 · 97 beneficiaries · Oncology Registered Nurse avg: 555
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Mary Granholm, RN MSN APN filed 1,006 Medicare Part D claims in 2023 as a Oncology Registered Nurse in Hackensack, New Jersey.
- 1K
- Part D claims, 2023
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.
Mary Granholm, RN MSN APN's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
1,006 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 Mary Granholm, RN MSN APN?
Quality data not reportedPrimary specialty
Oncology Registered Nurse
Medicare Part D claims
1,006 81% vs specialty avg
Specialty distribution in New Jersey
How Oncology Registered Nurse compares to other specialties among New Jersey 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 Oncology Registered Nurse. 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).
Mary Granholm, RN MSN APN appears in the CMS NPPES registry as an Oncology Registered Nurse provider holding RN MSN APN credentials at 20 PROSPECT AVE, Hackensack, NJ, 07601, with a listed phone of (201) 336-8297. NPI 1861620155 was issued on 06/25/2009.
Medicare Part D records for calendar year 2023 show 1,006 prescription claims written by this provider, covering 97 Medicare beneficiaries and totaling roughly $138K in drug spend, with an opioid prescribing rate of 2.5%.
Oncology Registered Nurse is a narrow specialty nationwide, with 883 enrolled providers across 50 states and an average of 555 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 | 1861620155 |
|---|---|
| Specialty | Oncology Registered Nurse |
| Credentials | RN MSN APN |
| Gender | Female |
| NPI Issued | 06/25/2009 |
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
1,006
Total Claims
$138K
Total Drug Cost
97
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,311
- Total Day Supply
- 67,990
- Generic Drug Cost
- $32K
- Opioid Claims
- 25 (2.5% rate)
Patient Demographics
- Average Patient Age
- 72.1 years
- Avg HCC Risk Score
- 1.20
- Gender Split
- 55% female / 45% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Mary Granholm, RN MSN APN prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
55 claims
- Losartan Potassium
Losartan Potassium
46 claims
- Levothyroxine Sodium
Levothyroxine Sodium
39 claims
- Simvastatin
Simvastatin
39 claims
- Metformin Hcl
Metformin Hcl
37 claims
- Metoprolol Succinate
Metoprolol Succinate
35 claims
- Amlodipine Besylate
Amlodipine Besylate
33 claims
- Lisinopril
Lisinopril
30 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 55 |
| Losartan Potassium | 46 |
| Levothyroxine Sodium | 39 |
| Simvastatin | 39 |
| Metformin Hcl | 37 |
| Metoprolol Succinate | 35 |
| Amlodipine Besylate | 33 |
| Lisinopril | 30 |
| Pantoprazole Sodium | 25 |
| Fluticasone Propionate | 23 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Oncology Registered Nurse Overview
How Mary Granholm, RN MSN APN fits within the Oncology Registered Nurse landscape nationally.
883
Oncology Registered Nurse Providers in US
50
States with Oncology Registered Nurse
555
Avg Claims per Provider
Mary Granholm, RN MSN APN's 1,006 claims are above the specialty average of 555.
Nearby Oncology Registered Nurse Providers in New Jersey
Other clinicians with the same primary specialty enrolled in New Jersey, drawn from the same CMS NPPES roster as Granholm.
Dr. Jennifer Abillar-Wright
FNP-BC
Montvale, NJ
Dr. Amber Delecce
RN
Sewell, NJ
Dr. Mary Downey-Freiman
RN MSN OCN
East Hanover, NJ
Dr. Michelyne Gavin
AGNP-C
Englewood, NJ
Dr. Dianne Harrison
RN, MSCN, AOCN, APNC
Paramus, NJ
Compare Oncology Registered Nurse 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 New Jersey medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Oncology Registered Nurse 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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How insurance networks affect your costs
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Frequently Asked Questions
What is Mary Granholm, RN MSN APN's specialty? ▼
Mary Granholm, RN MSN APN specializes in Oncology Registered Nurse and practices in Hackensack, New Jersey. Credentials: RN MSN APN.
How much does Mary Granholm, RN MSN APN prescribe under Medicare Part D? ▼
In 2023, Mary Granholm, RN MSN APN wrote 1,006 Medicare Part D claims totaling $138K in drug costs for 97 beneficiaries.
Where is Mary Granholm, RN MSN APN located? ▼
Mary Granholm, RN MSN APN is located at 20 PROSPECT AVE, Hackensack, NJ, 07601. Phone: (201) 336-8297.
What is Mary Granholm, RN MSN APN's NPI number? ▼
Mary Granholm, RN MSN APN's National Provider Identifier (NPI) is 1861620155, issued on 06/25/2009.
Does Mary Granholm, RN MSN APN prescribe opioids? ▼
Yes, Mary Granholm, RN MSN APN had 25 opioid claims in 2023 with an opioid prescribing rate of 2.5%.
How many Oncology Registered Nurse providers are there in the US? ▼
There are 883 Oncology Registered Nurse providers across 50 states in the US. The average Oncology Registered Nurse provider writes 555 Medicare Part D claims per year.
What drugs does Mary Granholm, RN MSN APN prescribe most often? ▼
Based on 2023 Medicare Part D data, Mary Granholm, RN MSN APN's most frequently prescribed drugs include Atorvastatin Calcium, Losartan Potassium, Levothyroxine Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Mary Granholm, RN MSN APN accept Medicare? ▼
Mary Granholm, RN MSN APN appears in CMS Medicare data with 1,006 Part D claims and 97 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mary Granholm, RN MSN APN's credentials? ▼
Mary Granholm, RN MSN APN's NPI is 1861620155 with credentials RN MSN APN. 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.