NPI registry status
Active
2026 NPPES data Oncology Clinical Nurse Specialist NPI 1790936649 N.P., C.N.S.
Verify on CMS → Susan Starr, N.P., C.N.S.
Oncology Clinical Nurse Specialist in Torrance, California.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 211 in Oncology Clinical Nurse Specialist, 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
816
Medicare Part D claims · 259 beneficiaries · Oncology Clinical Nurse Specialist avg: 435
Generic prescribing
78%
generic claims · 20% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$483.03
17 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Susan Starr, N.P., C.N.S. filed 816 Medicare Part D claims in 2023 as an Oncology Clinical Nurse Specialist in Torrance, California, prescribing 78% generic.
- 816
- Part D claims, 2023
- 78%
- generic prescribing
- $483.03
- industry payments (Sunshine Act)
- ≥73rd
- pct by Part D claim volume (lower-bound band)
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.
Susan Starr, N.P., C.N.S.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
816 ≥ 73rd percentile 73% of 1,370,886 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2023
What does the federal data show about Susan Starr, N.P., C.N.S.?
Quality data not reportedPrimary specialty
Oncology Clinical Nurse Specialist
Medicare Part D claims
816 88% vs specialty avg
Specialty distribution in California
How Oncology Clinical Nurse Specialist compares to other specialties among California 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 Clinical Nurse Specialist. 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).
Susan Starr, N.P., C.N.S. appears in the CMS NPPES registry as an Oncology Clinical Nurse Specialist provider holding N.P., C.N.S. credentials at 3285 SKYPARK DR, Torrance, CA, 90505, with a listed phone of (310) 750-3300. NPI 1790936649 was issued on 10/08/2008.
Medicare Part D records for calendar year 2023 show 816 prescription claims written by this provider, covering 259 Medicare beneficiaries and totaling roughly $900K in drug spend, split 20% brand-name and 78% generic by claim count, with an opioid prescribing rate of 5.5%.
Oncology Clinical Nurse Specialist is a narrow specialty nationwide, with 211 enrolled providers across 39 states and an average of 435 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 | 1790936649 |
|---|---|
| Specialty | Oncology Clinical Nurse Specialist |
| Credentials | N.P., C.N.S. |
| Gender | Female |
| NPI Issued | 10/08/2008 |
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 Susan Starr, N.P., C.N.S.. Source: openpaymentsdata.cms.gov.
Total received
$483
Largest payer
AstraZeneca Pharmaceuticals LP
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 - California MBC 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 ~150K California medical licensees in 2023 - they are NOT specific to Susan Starr, N.P., C.N.S.. To verify Susan Starr, N.P., C.N.S.'s current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases
MBC 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 California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Susan Starr, N.P., C.N.S. - brand share 20.0%
Oncology Clinical Nurse Specialist average
20% brand-name claims vs 78% generic, on 816 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.
816
Total Claims
$900K
Total Drug Cost
259
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,120
- Total Day Supply
- 27,312
- Brand vs Generic
- 20% brand / 78% generic
- Brand Drug Cost
- $879K
- Generic Drug Cost
- $21K
- Opioid Claims
- 45 (5.5% rate)
- Antibiotic Claims
- 111
Patient Demographics
- Average Patient Age
- 75.9 years
- Avg HCC Risk Score
- 2.21
- Gender Split
- 67% female / 33% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Susan Starr, N.P., C.N.S. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Prochlorperazine M…
Prochlorperazine Maleate
52 claims
- Ciprofloxacin Hcl
Ciprofloxacin Hcl
36 claims
- Acyclovir
Acyclovir
30 claims
- Hydroxyurea
Hydroxyurea
29 claims
- Xarelto
Xarelto
29 claims
- Dexamethasone
Dexamethasone
26 claims
- Ondansetron Hcl
Ondansetron Hcl
26 claims
- Raloxifene Hcl
Raloxifene Hcl
26 claims
| Drug | Claims |
|---|---|
| Prochlorperazine Maleate | 52 |
| Ciprofloxacin Hcl | 36 |
| Acyclovir | 30 |
| Hydroxyurea | 29 |
| Xarelto Rivaroxaban | 29 |
| Dexamethasone | 26 |
| Ondansetron Hcl | 26 |
| Raloxifene Hcl | 26 |
| Amoxicillin-Clavulanate Potass Amoxicillin/Potassium Clav | 22 |
| Diphenoxylate-Atropine Diphenoxylate Hcl/Atropine | 22 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Oncology Clinical Nurse Specialist Overview
How Susan Starr, N.P., C.N.S. fits within the Oncology Clinical Nurse Specialist landscape nationally.
211
Oncology Clinical Nurse Specialist Providers in US
39
States with Oncology Clinical Nurse Specialist
435
Avg Claims per Provider
Susan Starr, N.P., C.N.S.'s 816 claims are above the specialty average of 435.
Nearby Oncology Clinical Nurse Specialist Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Starr.
Dr. Rose Ambrosino-Cook
RN., MS., CNS., CNP.
Santa Rosa, CA
Dr. Barbara Baker
CNS
Burbank, CA
Dr. Alia Bana
CNS
Santa Clara, CA
Dr. Mc Darryl Banares
MSN,RN
Irvine, CA
Dr. Deborah Christensen
APRN-CNS
Mountain View, CA
Compare Oncology Clinical Nurse Specialist 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 California medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Oncology Clinical Nurse Specialist 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 Susan Starr, N.P., C.N.S.'s specialty? ▼
Susan Starr, N.P., C.N.S. specializes in Oncology Clinical Nurse Specialist and practices in Torrance, California. Credentials: N.P., C.N.S..
How much does Susan Starr, N.P., C.N.S. prescribe under Medicare Part D? ▼
In 2023, Susan Starr, N.P., C.N.S. wrote 816 Medicare Part D claims totaling $900K in drug costs for 259 beneficiaries.
Where is Susan Starr, N.P., C.N.S. located? ▼
Susan Starr, N.P., C.N.S. is located at 3285 SKYPARK DR, Torrance, CA, 90505. Phone: (310) 750-3300.
What is Susan Starr, N.P., C.N.S.'s NPI number? ▼
Susan Starr, N.P., C.N.S.'s National Provider Identifier (NPI) is 1790936649, issued on 10/08/2008.
Does Susan Starr, N.P., C.N.S. prescribe more brand-name or generic drugs? ▼
Susan Starr, N.P., C.N.S.'s prescribing is 20% brand-name and 78% generic drugs by claim count, with $879K in brand drug costs.
Does Susan Starr, N.P., C.N.S. prescribe opioids? ▼
Yes, Susan Starr, N.P., C.N.S. had 45 opioid claims in 2023 with an opioid prescribing rate of 5.5%.
How many Oncology Clinical Nurse Specialist providers are there in the US? ▼
There are 211 Oncology Clinical Nurse Specialist providers across 39 states in the US. The average Oncology Clinical Nurse Specialist provider writes 435 Medicare Part D claims per year.
What drugs does Susan Starr, N.P., C.N.S. prescribe most often? ▼
Based on 2023 Medicare Part D data, Susan Starr, N.P., C.N.S.'s most frequently prescribed drugs include Prochlorperazine Maleate, Ciprofloxacin Hcl, Acyclovir. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Susan Starr, N.P., C.N.S. accept Medicare? ▼
Susan Starr, N.P., C.N.S. appears in CMS Medicare data with 816 Part D claims and 259 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Susan Starr, N.P., C.N.S.'s credentials? ▼
Susan Starr, N.P., C.N.S.'s NPI is 1790936649 with credentials N.P., C.N.S.. 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
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.