NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1174514384 M.D.
Verify on CMS → Michael Fedak, M.D.
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 172,737 in 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
10K
Medicare Part D claims · 730 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
89%
generic claims · 10% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$127.3
7 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
Michael Fedak, M.D. filed 10,458 Medicare Part D claims in 2023 as a Internal Medicine Physician in Saint Louis, Missouri, prescribing 89% generic.
- 10K
- Part D claims, 2023
- 89%
- 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.
Michael Fedak, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
10,458 Top 2% higher than 98% 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)
Michael Fedak, 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 Michael Fedak, M.D.?
Quality data not reportedPrimary specialty
Internal Medicine Physician
Medicare Part D claims
10,458 285% vs specialty avg
Specialty distribution in Missouri
How 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 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).
Michael Fedak, M.D. appears in the CMS NPPES registry as an Internal Medicine Physician provider holding M.D. credentials at 13303 TESSON FERRY RD, Saint Louis, MO, 63128, with a listed phone of (314) 842-4744. NPI 1174514384 was issued on 11/04/2005.
Medicare Part D records for calendar year 2023 show 10,458 prescription claims written by this provider, covering 730 Medicare beneficiaries and totaling roughly $840K in drug spend, split 10% brand-name and 89% generic by claim count, with an opioid prescribing rate of 2.9%.
Internal Medicine Physician is a high-volume specialty nationwide, with 172,737 enrolled providers across 56 states and an average of 2,716 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 | 1174514384 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 11/04/2005 |
Hospital and facility affiliations
Facilities where Michael Fedak, 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.
American Multispecialty Group Inc
Saint Louis, 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 Michael Fedak, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$127
Largest payer
Sumitomo Pharma America, 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 · Typical
Michael Fedak, M.D. - brand share 10.0%
Internal Medicine Physician average
10% brand-name claims vs 89% generic, on 10,458 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.
10,458
Total Claims
$840K
Total Drug Cost
730
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 26,209
- Total Day Supply
- 772,540
- Brand vs Generic
- 10% brand / 89% generic
- Brand Drug Cost
- $638K
- Generic Drug Cost
- $195K
- Opioid Claims
- 308 (2.9% rate)
- Antibiotic Claims
- 128
Patient Demographics
- Average Patient Age
- 73.9 years
- Avg HCC Risk Score
- 1.28
- Gender Split
- 44% female / 56% male
- Age Distribution
- <65: 46, 65-74: 374, 75-84: 232, 85+: 78
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Michael Fedak, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
968 claims
- Lisinopril
Lisinopril
535 claims
- Amlodipine Besylate
Amlodipine Besylate
495 claims
- Losartan Potassium 337
Losartan Potassium
337 claims
- Metoprolol Succinate 325
Metoprolol Succinate
325 claims
- Omeprazole 302
Omeprazole
302 claims
- Metformin Hcl 288
Metformin Hcl
288 claims
- Hydrochlorothiazide 274
Hydrochlorothiazide
274 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 968 |
| Lisinopril | 535 |
| Amlodipine Besylate | 495 |
| Losartan Potassium | 337 |
| Metoprolol Succinate | 325 |
| Omeprazole | 302 |
| Metformin Hcl | 288 |
| Hydrochlorothiazide | 274 |
| Tamsulosin Hcl | 247 |
| Rosuvastatin Calcium | 200 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Internal Medicine Physician Overview
How Michael Fedak, M.D. fits within the Internal Medicine Physician landscape nationally.
172,737
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider
Michael Fedak, M.D.'s 10,458 claims are above the specialty average of 2,716.
Nearby Internal Medicine Physician Providers in Missouri
Other clinicians with the same primary specialty enrolled in Missouri, drawn from the same CMS NPPES roster as Fedak.
Dr. Betty Abban
M.D.
Springfield, MO
Dr. Amer Abbas
MD
Chesterfield, MO
Dr. Marghoob Abbas
M.D.
St. Joseph, MO
Dr. Muhammad Khalid Abbas
M.D.
Springfield, MO
Dr. Sundas Abbas
MD
Richmond Heights, MO
Compare Internal Medicine Physician 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 Missouri medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby 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.
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Frequently Asked Questions
What is Michael Fedak, M.D.'s specialty? ▼
Michael Fedak, M.D. specializes in Internal Medicine Physician and practices in Saint Louis, Missouri. Credentials: M.D..
How much does Michael Fedak, M.D. prescribe under Medicare Part D? ▼
In 2023, Michael Fedak, M.D. wrote 10,458 Medicare Part D claims totaling $840K in drug costs for 730 beneficiaries.
Where is Michael Fedak, M.D. located? ▼
Michael Fedak, M.D. is located at 13303 TESSON FERRY RD, Saint Louis, MO, 63128. Phone: (314) 842-4744.
What is Michael Fedak, M.D.'s NPI number? ▼
Michael Fedak, M.D.'s National Provider Identifier (NPI) is 1174514384, issued on 11/04/2005.
Does Michael Fedak, M.D. prescribe more brand-name or generic drugs? ▼
Michael Fedak, M.D.'s prescribing is 10% brand-name and 89% generic drugs by claim count, with $638K in brand drug costs.
Does Michael Fedak, M.D. prescribe opioids? ▼
Yes, Michael Fedak, M.D. had 308 opioid claims in 2023 with an opioid prescribing rate of 2.9%.
How many Internal Medicine Physician providers are there in the US? ▼
There are 172,737 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does Michael Fedak, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Michael Fedak, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Lisinopril, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Michael Fedak, M.D. accept Medicare? ▼
Michael Fedak, M.D. appears in CMS Medicare data with 10,458 Part D claims and 730 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Michael Fedak, M.D.'s credentials? ▼
Michael Fedak, M.D.'s NPI is 1174514384 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.
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.