2026 NPPES data Geriatric Medicine (Family Medicine) Physician NPI 1750917985 PA-C
Verify on CMS →

MARISA FELKER, PA-C

Geriatric Medicine (Family Medicine) Physician in STILLWATER, Minnesota. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
9K
Medicare Part D claims · 295 beneficiaries · Geriatric Medicine (Family Medicine) Physician avg: 5K
Generic prescribing
85%
generic claims · 15% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: MARISA FELKER, PA-C is a Geriatric Medicine (Family Medicine) Physician ([object Object]) practicing in STILLWATER, Minnesota with a Medicare Part D prescribing footprint of 9K claims across 295 beneficiaries — 15% brand-name prescribing .

What stands out: MARISA FELKER, PA-C filed 9,199 Medicare Part D claims in 2023 across STILLWATER, Minnesota. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

MARISA FELKER, PA-C 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).

MARISA FELKER, PA-C at a glance

Quality data not reported

NPI registry status

Active

Issued 03/19/2020

NPI 1750917985

Primary specialty

Geriatric Medicine (Family Medicine) Physician

Niche

1,779 US NPIs in this specialty

Medicare Part D claims

9,199 90% vs specialty avg

2023 prescription claims

Specialty avg: 4,854

Specialty distribution in Minnesota

How Geriatric Medicine (Family Medicine) Physician compares to other specialties among Minnesota providers

Minnesota providers

Geriatric Medicine (Family Medicine) Physician share within Minnesota

1. Geriatric Medicine (Family Medicine) Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Geriatric Medicine (Family Medicine) Physician share within Minnesota

Specialty board-certification context

Estimated specialty board-certified rate — Geriatric Medicine (Family Medicine) Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Geriatric Medicine (Family Medicine) Physician ABMS/AOA estimate

Est. board-certified rate (Geriatric Medicine (Family Medicine) Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Geriatric Medicine (Family Medicine) Physician) — ABMS / AOA estimate

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).

MARISA FELKER, PA-C is a Geriatric Medicine (Family Medicine) Physician provider practicing in STILLWATER, Minnesota, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: PA-C. NPI: 1750917985. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

MARISA FELKER, PA-C appears in the CMS NPPES registry as a Geriatric Medicine (Family Medicine) Physician provider holding PA-C credentials at 270 MAIN ST N STE 300, STILLWATER, MN, 55082, with a listed phone of (651) 342-1039. NPI 1750917985 was issued on 03/19/2020. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what FELKER most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 9,199 prescription claims written by this provider, covering 295 Medicare beneficiaries and totaling roughly $643K in drug spend, split 15% brand-name and 85% generic by claim count, with an opioid prescribing rate of 0.8%. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Geriatric Medicine (Family Medicine) Physician is a narrow specialty nationwide, with 1,779 enrolled providers across 52 states and an average of 4,854 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

270 MAIN ST N STE 300
STILLWATER, MN 55082

Provider Details

NPI 1750917985
Specialty Geriatric Medicine (Family Medicine) Physician
Credentials PA-C
Gender Female
NPI Issued 03/19/2020

Hospital and facility affiliations

Facilities where MARISA FELKER, PA-C 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.

BLUESTONE PHYSICIAN SERVICES PA
STILLWATER, MN

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

Brand vs generic prescribing mix · Typical

MARISA FELKER, PA-C — brand share 15.0%
Specialty average (est.)

15% brand-name claims vs 85% generic, on 9,199 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.

9,199
Total Claims
$643K
Total Drug Cost
295
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
9,522
Total Day Supply
261,666
Brand vs Generic
15% brand / 85% generic
Brand Drug Cost
$446K
Generic Drug Cost
$188K
Opioid Claims
77 (0.8% rate)
Antibiotic Claims
137

Patient Demographics

Average Patient Age
62.0 years
Avg HCC Risk Score
2.55
Gender Split
46% female / 54% male
Age Distribution
<65: 157, 65-74: 85, 75-84: 32, 85+: 21

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

Drug Claims
Levothyroxine Sodium
480
Atorvastatin Calcium
417
Omeprazole
417
Lisinopril
292
Tamsulosin Hcl
258
Amlodipine Besylate
232
Metformin Hcl Er
Metformin Hcl
221
Gabapentin
220
Sertraline Hcl
220
Pantoprazole Sodium
196

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Geriatric Medicine (Family Medicine) Physician Overview

How MARISA FELKER, PA-C fits within the Geriatric Medicine (Family Medicine) Physician landscape nationally.

1,779
Geriatric Medicine (Family Medicine) Physician Providers in US
52
States with Geriatric Medicine (Family Medicine) Physician
4,854
Avg Claims per Provider

MARISA FELKER, PA-C's 9,199 claims are above the specialty average of 4,854.

Nearby Geriatric Medicine (Family Medicine) Physician Providers in Minnesota

Other clinicians with the same primary specialty enrolled in Minnesota, drawn from the same CMS NPPES roster as FELKER.

Compare Geriatric Medicine (Family Medicine) Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is MARISA FELKER, PA-C's specialty?
MARISA FELKER, PA-C specializes in Geriatric Medicine (Family Medicine) Physician and practices in STILLWATER, Minnesota. Credentials: PA-C.
How much does MARISA FELKER, PA-C prescribe under Medicare Part D?
In 2023, MARISA FELKER, PA-C wrote 9,199 Medicare Part D claims totaling $643K in drug costs for 295 beneficiaries.
Where is MARISA FELKER, PA-C located?
MARISA FELKER, PA-C is located at 270 MAIN ST N STE 300, STILLWATER, MN, 55082. Phone: (651) 342-1039.
What is MARISA FELKER, PA-C's NPI number?
MARISA FELKER, PA-C's National Provider Identifier (NPI) is 1750917985, issued on 03/19/2020.
Does MARISA FELKER, PA-C prescribe more brand-name or generic drugs?
MARISA FELKER, PA-C's prescribing is 15% brand-name and 85% generic drugs by claim count, with $446K in brand drug costs.
Does MARISA FELKER, PA-C prescribe opioids?
Yes, MARISA FELKER, PA-C had 77 opioid claims in 2023 with an opioid prescribing rate of 0.8%.
How many Geriatric Medicine (Family Medicine) Physician providers are there in the US?
There are 1,779 Geriatric Medicine (Family Medicine) Physician providers across 52 states in the US. The average Geriatric Medicine (Family Medicine) Physician provider writes 4,854 Medicare Part D claims per year.
What drugs does MARISA FELKER, PA-C prescribe most often?
Based on 2023 Medicare Part D data, MARISA FELKER, PA-C's most frequently prescribed drugs include Levothyroxine Sodium, Atorvastatin Calcium, Omeprazole. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does MARISA FELKER, PA-C accept Medicare?
MARISA FELKER, PA-C appears in CMS Medicare data with 9,199 Part D claims and 295 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify MARISA FELKER, PA-C's credentials?
MARISA FELKER, PA-C's NPI is 1750917985 with credentials PA-C. 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

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