NPI registry status
Active
2026 NPPES data Gynecologic Oncology Physician NPI 1700876307 M.D.
Verify on CMS → Barbara Buttin, M.D.
Gynecologic Oncology Physician in Zion, Illinois.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 1,364 in Gynecologic Oncology 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
177
Medicare Part D claims · 47 beneficiaries · Gynecologic Oncology Physician avg: 188
Generic prescribing
86%
generic claims · 14% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$346.89
17 payments · CMS Open Payments (Sunshine Act)
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
Barbara Buttin, M.D. filed 177 Medicare Part D claims in 2023 as a Gynecologic Oncology Physician in Zion, Illinois, prescribing 86% generic.
- 177
- Part D claims, 2023
- 86%
- generic prescribing
- Likely
- board-certified (heuristic)
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.
Barbara Buttin, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
177 35th percentile higher than 35% 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 certification likely (heuristic, not verified)
Barbara Buttin, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Barbara Buttin, M.D.?
Quality data not reportedPrimary specialty
Gynecologic Oncology Physician
Medicare Part D claims
177 6% vs specialty avg
Specialty distribution in Illinois
How Gynecologic Oncology Physician compares to other specialties among Illinois 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 Gynecologic Oncology 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).
Barbara Buttin, M.D. appears in the CMS NPPES registry as a Gynecologic Oncology Physician provider holding M.D. credentials at CANCER TREATMENT CENTERS OF AMERICA, Zion, IL, 60099, with a listed phone of (800) 322-9183. NPI 1700876307 was issued on 10/25/2005.
Medicare Part D records for calendar year 2023 show 177 prescription claims written by this provider, covering 47 Medicare beneficiaries and totaling roughly $152K in drug spend, split 14% brand-name and 86% generic by claim count.
Gynecologic Oncology Physician is a narrow specialty nationwide, with 1,364 enrolled providers across 49 states and an average of 188 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 | 1700876307 |
|---|---|
| Specialty | Gynecologic Oncology Physician |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 10/25/2005 |
Hospital and facility affiliations
Facilities where Barbara Buttin, M.D. 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.
City OF Hope Medical Group OF Illinois PLLC
Zion, IL
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 Barbara Buttin, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$347
Largest payer
Novartis Pharmaceuticals Corporation
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 - Illinois IDFPR 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 ~42K Illinois medical licensees in 2023 - they are NOT specific to Barbara Buttin, M.D.. To verify Barbara Buttin, M.D.'s current license status, search the IDFPR public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
106
Total board actions, Illinois 2023
Across 103 cases
2.52
Actions per 1,000 licensees
Illinois statewide rate
probation
Most common action type
38 cases
IDFPR 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 Illinois disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Barbara Buttin, M.D. - brand share 14.0%
Gynecologic Oncology Physician average
14% brand-name claims vs 86% generic, on 177 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.
177
Total Claims
$152K
Total Drug Cost
47
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 192
- Total Day Supply
- 3,857
- Brand vs Generic
- 14% brand / 86% generic
- Brand Drug Cost
- $146K
- Generic Drug Cost
- $6K
- Antibiotic Claims
- 13
Patient Demographics
- Average Patient Age
- 70.9 years
- Avg HCC Risk Score
- 2.75
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Barbara Buttin, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Dexamethasone
Dexamethasone
40 claims
- Letrozole
Letrozole
18 claims
- Famotidine
Famotidine
16 claims
- Methylprednisolone 11
Methylprednisolone
11 claims
| Drug | Claims |
|---|---|
| Dexamethasone | 40 |
| Letrozole | 18 |
| Famotidine | 16 |
| Methylprednisolone | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Gynecologic Oncology Physician Overview
How Barbara Buttin, M.D. fits within the Gynecologic Oncology Physician landscape nationally.
1,364
Gynecologic Oncology Physician Providers in US
49
States with Gynecologic Oncology Physician
188
Avg Claims per Provider
Barbara Buttin, M.D.'s 177 claims are below the specialty average of 188.
Nearby Gynecologic Oncology Physician Providers in Illinois
Other clinicians with the same primary specialty enrolled in Illinois, drawn from the same CMS NPPES roster as Buttin.
Dr. Sarah Ackroyd
M.D, M.P.H
Chicago, IL
Dr. Amina Ahmed
MD
Chicago, IL
Dr. Addie Alkhas
M.D.
Park Ridge, IL
Dr. Gary Altwerger
M.D.
Chicago, IL
Dr. Freidoon Azizi
MD
Chicago, IL
Compare Gynecologic Oncology 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 Illinois medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Gynecologic Oncology 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 Barbara Buttin, M.D.'s specialty? ▼
Barbara Buttin, M.D. specializes in Gynecologic Oncology Physician and practices in Zion, Illinois. Credentials: M.D..
How much does Barbara Buttin, M.D. prescribe under Medicare Part D? ▼
In 2023, Barbara Buttin, M.D. wrote 177 Medicare Part D claims totaling $152K in drug costs for 47 beneficiaries.
Where is Barbara Buttin, M.D. located? ▼
Barbara Buttin, M.D. is located at CANCER TREATMENT CENTERS OF AMERICA, Zion, IL, 60099. Phone: (800) 322-9183.
What is Barbara Buttin, M.D.'s NPI number? ▼
Barbara Buttin, M.D.'s National Provider Identifier (NPI) is 1700876307, issued on 10/25/2005.
Does Barbara Buttin, M.D. prescribe more brand-name or generic drugs? ▼
Barbara Buttin, M.D.'s prescribing is 14% brand-name and 86% generic drugs by claim count, with $146K in brand drug costs.
How many Gynecologic Oncology Physician providers are there in the US? ▼
There are 1,364 Gynecologic Oncology Physician providers across 49 states in the US. The average Gynecologic Oncology Physician provider writes 188 Medicare Part D claims per year.
What drugs does Barbara Buttin, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Barbara Buttin, M.D.'s most frequently prescribed drugs include Dexamethasone, Letrozole, Famotidine. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Barbara Buttin, M.D. accept Medicare? ▼
Barbara Buttin, M.D. appears in CMS Medicare data with 177 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 Barbara Buttin, M.D.'s credentials? ▼
Barbara Buttin, M.D.'s NPI is 1700876307 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.