NPI registry status
Active
2026 NPPES data Critical Care Medicine (Internal Medicine) Physician NPI 1235313131 MD, PHD
Verify on CMS → Katherine Hisert, MD, PHD
Critical Care Medicine (Internal Medicine) Physician in Denver, Colorado.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 6,631 in Critical Care 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
262
Medicare Part D claims · 13 beneficiaries · Critical Care Medicine (Internal Medicine) Physician avg: 1K
Industry payments
$65.53
3 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Katherine Hisert, MD, PHD filed 262 Medicare Part D claims in 2023 as a Critical Care Medicine (Internal Medicine) Physician in Denver, Colorado.
- 262
- Part D claims, 2023
- 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.
Katherine Hisert, MD, PHD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
262 49th percentile higher than 49% 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)
Katherine Hisert, MD, PHD 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 Katherine Hisert, MD, PHD?
Quality data not reportedPrimary specialty
Critical Care Medicine (Internal Medicine) Physician
Medicare Part D claims
262 75% vs specialty avg
Specialty distribution in Colorado
How Critical Care Medicine (Internal Medicine) Physician compares to other specialties among Colorado 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 Critical Care 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).
Katherine Hisert, MD, PHD appears in the CMS NPPES registry as a Critical Care Medicine (Internal Medicine) Physician provider holding MD, PHD credentials at 1400 JACKSON ST, Denver, CO, 80206, with a listed phone of (303) 388-4461. NPI 1235313131 was issued on 12/27/2007.
Medicare Part D records for calendar year 2023 show 262 prescription claims written by this provider, covering 13 Medicare beneficiaries and totaling roughly $1.5 million in drug spend.
Critical Care Medicine (Internal Medicine) Physician is a mid-sized specialty nationwide, with 6,631 enrolled providers across 53 states and an average of 1,069 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 | 1235313131 |
|---|---|
| Specialty | Critical Care Medicine (Internal Medicine) Physician |
| Credentials | MD, PHD |
| Gender | Female |
| NPI Issued | 12/27/2007 |
Hospital and facility affiliations
Facilities where Katherine Hisert, MD, PHD 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.
National Jewish Health
Denver, CO
Acute Care Hospitals
CMS CCN: 060107
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 Katherine Hisert, MD, PHD. Source: openpaymentsdata.cms.gov.
Total received
$66
Largest payer
VERTEX PHARMACEUTICALS INCORPORATED
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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
262
Total Claims
$1.5M
Total Drug Cost
13
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 271
- Total Day Supply
- 6,758
- Generic Drug Cost
- $7K
- Antibiotic Claims
- 39
Patient Demographics
- Average Patient Age
- 58.3 years
- Avg HCC Risk Score
- 3.78
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Katherine Hisert, MD, PHD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Trikafta
Trikafta
47 claims
- Prednisone 12
Prednisone
12 claims
- Duloxetine Hcl 11
Duloxetine Hcl
11 claims
| Drug | Claims |
|---|---|
| Trikafta Elexacaftor/Tezacaftor/Ivacaft | 47 |
| Prednisone | 12 |
| Duloxetine Hcl | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Critical Care Medicine (Internal Medicine) Physician in CO →
All providers in Colorado →
Compare specialties →
Critical Care Medicine (Internal Medicine) Physician Overview
How Katherine Hisert, MD, PHD fits within the Critical Care Medicine (Internal Medicine) Physician landscape nationally.
6,631
Critical Care Medicine (Internal Medicine) Physician Providers in US
53
States with Critical Care Medicine (Internal Medicine) Physician
1,069
Avg Claims per Provider
Katherine Hisert, MD, PHD's 262 claims are below the specialty average of 1,069.
Nearby Critical Care Medicine (Internal Medicine) Physician Providers in Colorado
Other clinicians with the same primary specialty enrolled in Colorado, drawn from the same CMS NPPES roster as Hisert.
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 Colorado medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Critical Care 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
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How to Find a Doctor
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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
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Frequently Asked Questions
What is Katherine Hisert, MD, PHD's specialty? ▼
Katherine Hisert, MD, PHD specializes in Critical Care Medicine (Internal Medicine) Physician and practices in Denver, Colorado. Credentials: MD, PHD.
How much does Katherine Hisert, MD, PHD prescribe under Medicare Part D? ▼
In 2023, Katherine Hisert, MD, PHD wrote 262 Medicare Part D claims totaling $1.5M in drug costs for 13 beneficiaries.
Where is Katherine Hisert, MD, PHD located? ▼
Katherine Hisert, MD, PHD is located at 1400 JACKSON ST, Denver, CO, 80206. Phone: (303) 388-4461.
What is Katherine Hisert, MD, PHD's NPI number? ▼
Katherine Hisert, MD, PHD's National Provider Identifier (NPI) is 1235313131, issued on 12/27/2007.
How many Critical Care Medicine (Internal Medicine) Physician providers are there in the US? ▼
There are 6,631 Critical Care Medicine (Internal Medicine) Physician providers across 53 states in the US. The average Critical Care Medicine (Internal Medicine) Physician provider writes 1,069 Medicare Part D claims per year.
What drugs does Katherine Hisert, MD, PHD prescribe most often? ▼
Based on 2023 Medicare Part D data, Katherine Hisert, MD, PHD's most frequently prescribed drugs include Trikafta, Prednisone, Duloxetine Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Katherine Hisert, MD, PHD accept Medicare? ▼
Katherine Hisert, MD, PHD appears in CMS Medicare data with 262 Part D claims and 13 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Katherine Hisert, MD, PHD's credentials? ▼
Katherine Hisert, MD, PHD's NPI is 1235313131 with credentials MD, PHD. 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.