Karen Marie Dowden , NP
Nurse Practitioner • Port Huron, MI
1214 Richardson St
Port Huron, MI 480603549
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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NPI assigned on February 6, 2007; this date does not establish years in practice.
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Published CMS data list 60 Medicare Part D prescriptions, including refills, in 2014.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2014. Published rows only; this is not a quality measure.
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Published Part D records, 2014:
- Hydroxyurea — 26 prescription fills, including refills.
- Warfarin Sodium — 21 prescription fills, including refills.
- Prochlorperazine Maleate — 13 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2014. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table · Guide: How to read Medicare Part D prescriber data
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Medicare Part D prescriptions went from 75 in 2013 to 60 in 2014.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2013–2014.
Practice Location & Contact Primary Location
1214 Richardson St
Port Huron, MI 480603549
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
What Public CMS Data Show
Nurse Practitioner: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
115 standardized 30-day fills in 2014
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$1,259 in 2014
The total cost of these prescriptions in 2014, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2014.
Open Payments general payments, program year 2025
All general payments: $42.35 across 2 records.
By nature of payment
- Food and Beverage: $42.35 across 2 records.
Reporting-company totals
- ABBVIE INC.: $22.81 across 1 record.
- Exact Sciences Corporation: $19.54 across 1 record.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
NPI first issued
2007
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, “Does your provider accept Medicare as full payment?”
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Compared with the same specialty in Port Huron and Michigan
Billing and prescribing volume is not a quality rating.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Karen Dowden are from 2014.
21 active clinicians are listed under Nurse Practitioner with a practice address in Port Huron, MI (3,576 in Michigan).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Port Huron
14.3% of these 21 clinicians have the CMS telehealth indicator.
47.6% of these 21 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 20% from 75 in 2013 to 60 in 2014.
- 2013: 75
- 2014: 60
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30-day fills
30-day fills stayed about the same: 114 in 2013 and 115 in 2014.
- 2013: 114
- 2014: 115
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Part D drug cost
Part D drug cost decreased 31% from $1,837 in 2013 to $1,259 in 2014.
- 2013: $1,837
- 2014: $1,259
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $25.57 in 2024 to $42.35 in 2025.
- 2024: $25.57
- 2025: $42.35
Sources: CMS Medicare Part D Prescribers (2014), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 – December 31, 2025): fewer than 11 records totaling $42.35.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| ABBVIE INC. |
Food and Beverage
In-kind items and services
|
VRAYLAR | General | $22.81 |
| Exact Sciences Corporation |
Food and Beverage
In-kind items and services
|
Cologuard Collection Kit | General | $19.54 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2014.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Hydroxyurea | Hydroxyurea | 26 | 1,468 | $893.87 | — |
| Warfarin Sodium | Warfarin Sodium | 21 | 1,573 | $295.95 | — |
| Prochlorperazine Maleate | Prochlorperazine Maleate | 13 | 104 | $69.26 | — |
Source: CMS Part D by Provider and Drug, 2014; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 363L00000X
(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Internal Medicine - Hematology & Oncology
Doctor of Medicine (M.D.)
Internal Medicine - Hematology & Oncology
Doctor of Medicine (M.D.)
Internal Medicine - Hematology & Oncology
Doctor of Medicine (M.D.)
Nurse Practitioner - Acute Care
Registered Nurse
Career & Practice History
NPI enumerated February 06, 2007.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to August 2026.
NPI Administrative Meta
Other Nurse Practitioners in Port Huron
- Birgitte Murphy, NP-C
- Amanda Whymer, NP
- Mary Lynn Zaremba, NP, RN
- Taylor Stocker, FNP-C
- Valerie Wetzel, NP
- Annmarie Johnson, MSN, PMHNP-BP
Mailing Address
1214 Richardson St
Port Huron, MI 480603549
Phone: 8109825200