NPI registry status
Active
2026 NPPES data Critical Care Medicine Registered Nurse NPI 1508898800 APRN
Verify on CMS → Gretchen Michaelson, APRN
Critical Care Medicine Registered Nurse in South Windsor, Connecticut.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 6,553 in Critical Care Medicine 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
985
Medicare Part D claims · 101 beneficiaries · Critical Care Medicine Registered Nurse avg: 752
Generic prescribing
57%
generic claims · 43% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$18.2K
143 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Gretchen Michaelson, APRN filed 985 Medicare Part D claims in 2023 as a Critical Care Medicine Registered Nurse in South Windsor, Connecticut, prescribing 57% generic.
- 985
- Part D claims, 2023
- 57%
- generic prescribing
- $18.2K
- industry payments (Sunshine Act)
- ≥75th
- 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.
Gretchen Michaelson, APRN's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
985 ≥ 75th percentile 75% 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 Gretchen Michaelson, APRN?
Quality data not reportedPrimary specialty
Critical Care Medicine Registered Nurse
Medicare Part D claims
985 31% vs specialty avg
Specialty distribution in Connecticut
How Critical Care Medicine Registered Nurse compares to other specialties among Connecticut 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 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).
Gretchen Michaelson, APRN appears in the CMS NPPES registry as a Critical Care Medicine Registered Nurse provider holding APRN credentials at 1741 ELLINGTON RD STE 1, South Windsor, CT, 06074, with a listed phone of (860) 263-3603. NPI 1508898800 was issued on 07/07/2006.
Medicare Part D records for calendar year 2023 show 985 prescription claims written by this provider, covering 101 Medicare beneficiaries and totaling roughly $541K in drug spend, split 43% brand-name and 57% generic by claim count.
Critical Care Medicine Registered Nurse is a mid-sized specialty nationwide, with 6,553 enrolled providers across 53 states and an average of 752 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 | 1508898800 |
|---|---|
| Specialty | Critical Care Medicine Registered Nurse |
| Credentials | APRN |
| Gender | Female |
| NPI Issued | 07/07/2006 |
Hospital and facility affiliations
Facilities where Gretchen Michaelson, APRN 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.
Headache Care Center PLLC
South Windsor, CT
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 Gretchen Michaelson, APRN. Source: openpaymentsdata.cms.gov.
Total received
$18.2K
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 · Above average
Gretchen Michaelson, APRN - brand share 43.0%
Critical Care Medicine Registered Nurse average
43% brand-name claims vs 57% generic, on 985 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.
985
Total Claims
$541K
Total Drug Cost
101
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,601
- Total Day Supply
- 45,006
- Brand vs Generic
- 43% brand / 57% generic
- Brand Drug Cost
- $524K
- Generic Drug Cost
- $16K
Patient Demographics
- Average Patient Age
- 65.2 years
- Avg HCC Risk Score
- 0.82
- Gender Split
- 84% female / 16% male
- Age Distribution
- <65: 23, 65-74: 70, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Gretchen Michaelson, APRN prescribes most
Top Medicare Part D drugs by claim count, 2023
- Gabapentin
Gabapentin
136 claims
- Emgality Pen
Emgality Pen
90 claims
- Nurtec Odt
Nurtec Odt
79 claims
- Rizatriptan
Rizatriptan
79 claims
- Botox
Botox
75 claims
- Sumatriptan Succin…
Sumatriptan Succinate
74 claims
- Ubrelvy
Ubrelvy
55 claims
- Ajovy Autoinjector 51
Ajovy Autoinjector
51 claims
| Drug | Claims |
|---|---|
| Gabapentin | 136 |
| Emgality Pen Galcanezumab-Gnlm | 90 |
| Nurtec Odt Rimegepant Sulfate | 79 |
| Rizatriptan Rizatriptan Benzoate | 79 |
| Botox Onabotulinumtoxina | 75 |
| Sumatriptan Succinate | 74 |
| Ubrelvy Ubrogepant | 55 |
| Ajovy Autoinjector Fremanezumab-Vfrm | 51 |
| Topiramate | 33 |
| Pregabalin | 24 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Critical Care Medicine Registered Nurse in CT →
All providers in Connecticut →
Compare specialties →
Critical Care Medicine Registered Nurse Overview
How Gretchen Michaelson, APRN fits within the Critical Care Medicine Registered Nurse landscape nationally.
6,553
Critical Care Medicine Registered Nurse Providers in US
53
States with Critical Care Medicine Registered Nurse
752
Avg Claims per Provider
Gretchen Michaelson, APRN's 985 claims are above the specialty average of 752.
Nearby Critical Care Medicine Registered Nurse Providers in Connecticut
Other clinicians with the same primary specialty enrolled in Connecticut, drawn from the same CMS NPPES roster as Michaelson.
One of 58 Critical Care Medicine Registered Nurse providers enrolled in Connecticut, 5 are shown here.
Cephas Ayellakai
New Haven, CT
Dr. Arianna Bailey
DNP, APRN, FNP-BC
Stamford, CT
Dr. Jasmine Caban
APRN
Hartford, CT
Dr. Ana Caceres
APRN
Hartford, CT
Rae Caliento
New Haven, CT
Compare Critical Care Medicine 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 Connecticut 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 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
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 Connecticut
Frequently Asked Questions
What is Gretchen Michaelson, APRN's specialty? ▼
Gretchen Michaelson, APRN specializes in Critical Care Medicine Registered Nurse and practices in South Windsor, Connecticut. Credentials: APRN.
How much does Gretchen Michaelson, APRN prescribe under Medicare Part D? ▼
In 2023, Gretchen Michaelson, APRN wrote 985 Medicare Part D claims totaling $541K in drug costs for 101 beneficiaries.
Where is Gretchen Michaelson, APRN located? ▼
Gretchen Michaelson, APRN is located at 1741 ELLINGTON RD STE 1, South Windsor, CT, 06074. Phone: (860) 263-3603.
What is Gretchen Michaelson, APRN's NPI number? ▼
Gretchen Michaelson, APRN's National Provider Identifier (NPI) is 1508898800, issued on 07/07/2006.
Does Gretchen Michaelson, APRN prescribe more brand-name or generic drugs? ▼
Gretchen Michaelson, APRN's prescribing is 43% brand-name and 57% generic drugs by claim count, with $524K in brand drug costs.
How many Critical Care Medicine Registered Nurse providers are there in the US? ▼
There are 6,553 Critical Care Medicine Registered Nurse providers across 53 states in the US. The average Critical Care Medicine Registered Nurse provider writes 752 Medicare Part D claims per year.
What drugs does Gretchen Michaelson, APRN prescribe most often? ▼
Based on 2023 Medicare Part D data, Gretchen Michaelson, APRN's most frequently prescribed drugs include Gabapentin, Emgality Pen, Nurtec Odt. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Gretchen Michaelson, APRN accept Medicare? ▼
Gretchen Michaelson, APRN appears in CMS Medicare data with 985 Part D claims and 101 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Gretchen Michaelson, APRN's credentials? ▼
Gretchen Michaelson, APRN's NPI is 1508898800 with credentials APRN. 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.