NPI registry status
Active
2026 NPPES data Hospice and Palliative Medicine (Internal Medicine) Physician NPI 1184678625 M.D.
Verify on CMS → Katharine Ponzillo, M.D.
Hospice and Palliative Medicine (Internal Medicine) Physician in Saint Louis, Missouri.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 1,524 in Hospice and Palliative Medicine (Internal Medicine) 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
423
Medicare Part D claims · 23 beneficiaries · Hospice and Palliative Medicine (Internal Medicine) Physician avg: 1K
Generic prescribing
91%
generic claims · 9% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$15.2
1 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
Katharine Ponzillo, M.D. filed 423 Medicare Part D claims in 2023 as a Hospice and Palliative Medicine (Internal Medicine) Physician in Saint Louis, Missouri, prescribing 91% generic.
- 423
- Part D claims, 2023
- 91%
- 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.
Katharine Ponzillo, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
423 Top 38% higher than 62% 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)
Katharine Ponzillo, 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 Katharine Ponzillo, M.D.?
Quality data not reportedPrimary specialty
Hospice and Palliative Medicine (Internal Medicine) Physician
Medicare Part D claims
423 67% vs specialty avg
Specialty distribution in Missouri
How Hospice and Palliative Medicine (Internal Medicine) Physician compares to other specialties among Missouri 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 Hospice and Palliative Medicine (Internal Medicine) 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).
Katharine Ponzillo, M.D. appears in the CMS NPPES registry as a Hospice and Palliative Medicine (Internal Medicine) Physician provider holding M.D. credentials at 3009 N BALLAS RD STE 383C, Saint Louis, MO, 63131, with a listed phone of (314) 305-1447. NPI 1184678625 was issued on 05/20/2006.
Medicare Part D records for calendar year 2023 show 423 prescription claims written by this provider, covering 23 Medicare beneficiaries and totaling roughly $56K in drug spend, split 9% brand-name and 91% generic by claim count, with an opioid prescribing rate of 53.2%.
Hospice and Palliative Medicine (Internal Medicine) Physician is a narrow specialty nationwide, with 1,524 enrolled providers across 51 states and an average of 1,275 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 | 1184678625 |
|---|---|
| Specialty | Hospice and Palliative Medicine (Internal Medicine) Physician |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 05/20/2006 |
Hospital and facility affiliations
Facilities where Katharine Ponzillo, 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.
Complex Illness Management OF St Lukes LLC
Chesterfield, MO
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 Katharine Ponzillo, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$15
Largest payer
ABBVIE 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.
Brand vs generic prescribing mix · Generic-heavy
Katharine Ponzillo, M.D. - brand share 9.0%
Hospice and Palliative Medicine (Internal Medicine) Physician average
9% brand-name claims vs 91% generic, on 423 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.
423
Total Claims
$56K
Total Drug Cost
23
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 440
- Total Day Supply
- 12,384
- Brand vs Generic
- 9% brand / 91% generic
- Brand Drug Cost
- $7K
- Generic Drug Cost
- $50K
- Opioid Claims
- 225 (53.2% rate)
Patient Demographics
- Average Patient Age
- 65.8 years
- Avg HCC Risk Score
- 2.37
- Gender Split
- 52% female / 48% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Katharine Ponzillo, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Alprazolam
Alprazolam
58 claims
- Hydrocodone-Acetam…
Hydrocodone-Acetaminophen
36 claims
- Oxycodone-Acetamin…
Oxycodone-Acetaminophen
30 claims
- Morphine Sulfate Er
Morphine Sulfate Er
29 claims
- Oxycodone Hcl
Oxycodone Hcl
29 claims
- Fentanyl
Fentanyl
27 claims
- Hydromorphone Hcl
Hydromorphone Hcl
24 claims
- Lorazepam
Lorazepam
24 claims
| Drug | Claims |
|---|---|
| Alprazolam | 58 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 36 |
| Oxycodone-Acetaminophen Oxycodone Hcl/Acetaminophen | 30 |
| Morphine Sulfate Er Morphine Sulfate | 29 |
| Oxycodone Hcl | 29 |
| Fentanyl | 27 |
| Hydromorphone Hcl | 24 |
| Lorazepam | 24 |
| Methadone Hcl | 14 |
| Oxycontin Oxycodone Hcl | 14 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Hospice and Palliative Medicine (Internal Medicine) Physician in MO →
All providers in Missouri →
Compare specialties →
Hospice and Palliative Medicine (Internal Medicine) Physician Overview
How Katharine Ponzillo, M.D. fits within the Hospice and Palliative Medicine (Internal Medicine) Physician landscape nationally.
1,524
Hospice and Palliative Medicine (Internal Medicine) Physician Providers in US
51
States with Hospice and Palliative Medicine (Internal Medicine) Physician
1,275
Avg Claims per Provider
Katharine Ponzillo, M.D.'s 423 claims are below the specialty average of 1,275.
Nearby Hospice and Palliative Medicine (Internal Medicine) Physician Providers in Missouri
Other clinicians with the same primary specialty enrolled in Missouri, drawn from the same CMS NPPES roster as Ponzillo.
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 Missouri medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Hospice and Palliative Medicine (Internal Medicine) 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.
Healthcare Guides
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Missouri
Frequently Asked Questions
What is Katharine Ponzillo, M.D.'s specialty? ▼
Katharine Ponzillo, M.D. specializes in Hospice and Palliative Medicine (Internal Medicine) Physician and practices in Saint Louis, Missouri. Credentials: M.D..
How much does Katharine Ponzillo, M.D. prescribe under Medicare Part D? ▼
In 2023, Katharine Ponzillo, M.D. wrote 423 Medicare Part D claims totaling $56K in drug costs for 23 beneficiaries.
Where is Katharine Ponzillo, M.D. located? ▼
Katharine Ponzillo, M.D. is located at 3009 N BALLAS RD STE 383C, Saint Louis, MO, 63131. Phone: (314) 305-1447.
What is Katharine Ponzillo, M.D.'s NPI number? ▼
Katharine Ponzillo, M.D.'s National Provider Identifier (NPI) is 1184678625, issued on 05/20/2006.
Does Katharine Ponzillo, M.D. prescribe more brand-name or generic drugs? ▼
Katharine Ponzillo, M.D.'s prescribing is 9% brand-name and 91% generic drugs by claim count, with $7K in brand drug costs.
Does Katharine Ponzillo, M.D. prescribe opioids? ▼
Yes, Katharine Ponzillo, M.D. had 225 opioid claims in 2023 with an opioid prescribing rate of 53.2%.
How many Hospice and Palliative Medicine (Internal Medicine) Physician providers are there in the US? ▼
There are 1,524 Hospice and Palliative Medicine (Internal Medicine) Physician providers across 51 states in the US. The average Hospice and Palliative Medicine (Internal Medicine) Physician provider writes 1,275 Medicare Part D claims per year.
What drugs does Katharine Ponzillo, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Katharine Ponzillo, M.D.'s most frequently prescribed drugs include Alprazolam, Hydrocodone-Acetaminophen, Oxycodone-Acetaminophen. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Katharine Ponzillo, M.D. accept Medicare? ▼
Katharine Ponzillo, M.D. appears in CMS Medicare data with 423 Part D claims and 23 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Katharine Ponzillo, M.D.'s credentials? ▼
Katharine Ponzillo, M.D.'s NPI is 1184678625 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.