NPI registry status
Active
2026 NPPES data Otolaryngology Physician NPI 1508821901 D.O., FAOCO
Verify on CMS → Thomas Pfennig, D.O., FAOCO
Otolaryngology Physician in Wyoming, Michigan.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 10,893 in Otolaryngology 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
521
Medicare Part D claims · 170 beneficiaries · Otolaryngology Physician avg: 509
Generic prescribing
88%
generic claims · 12% brand-name · higher generic rates reduce patient out-of-pocket costs
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
Thomas Pfennig, D.O., FAOCO filed 521 Medicare Part D claims in 2023 as an Otolaryngology Physician in Wyoming, Michigan, prescribing 88% generic.
- 521
- Part D claims, 2023
- 88%
- generic prescribing
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.
Thomas Pfennig, D.O., FAOCO's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
521 Top 34% higher than 66% 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-eligible specialty (heuristic, not verified)
Thomas Pfennig, D.O., FAOCO practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Thomas Pfennig, D.O., FAOCO?
Quality data not reportedPrimary specialty
Otolaryngology Physician
Medicare Part D claims
521 2% vs specialty avg
Specialty distribution in Michigan
How Otolaryngology Physician compares to other specialties among Michigan 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 Otolaryngology 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).
Thomas Pfennig, D.O., FAOCO appears in the CMS NPPES registry as an Otolaryngology Physician provider holding D.O., FAOCO credentials at 1555 44TH ST SW, Wyoming, MI, 49509, with a listed phone of (616) 249-8000. NPI 1508821901 was issued on 04/19/2006.
Medicare Part D records for calendar year 2023 show 521 prescription claims written by this provider, covering 170 Medicare beneficiaries and totaling roughly $73K in drug spend, split 12% brand-name and 88% generic by claim count, with an opioid prescribing rate of 4.2%.
Otolaryngology Physician is a mid-sized specialty nationwide, with 10,893 enrolled providers across 54 states and an average of 509 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 | 1508821901 |
|---|---|
| Specialty | Otolaryngology Physician |
| Credentials | D.O., FAOCO |
| Gender | Male |
| NPI Issued | 04/19/2006 |
License & disciplinary context - Michigan MI-BOM 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~41K Michigan medical licensees in 2023 - they are NOT specific to Thomas Pfennig, D.O., FAOCO. To verify Thomas Pfennig, D.O., FAOCO's current license status, search the MI-BOM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
123
Total board actions, Michigan 2023
Across 120 cases
3.00
Actions per 1,000 licensees
Michigan statewide rate
probation
Most common action type
44 cases
MI-BOM publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Michigan disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Thomas Pfennig, D.O., FAOCO - brand share 12.0%
Otolaryngology Physician average
12% brand-name claims vs 88% generic, on 521 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.
521
Total Claims
$73K
Total Drug Cost
170
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 669
- Total Day Supply
- 15,611
- Brand vs Generic
- 12% brand / 88% generic
- Brand Drug Cost
- $63K
- Generic Drug Cost
- $10K
- Opioid Claims
- 22 (4.2% rate)
- Antibiotic Claims
- 108
Patient Demographics
- Average Patient Age
- 72.5 years
- Avg HCC Risk Score
- 1.20
- Gender Split
- 63% female / 37% male
- Age Distribution
- <65: 21, 65-74: 78, 75-84: 52, 85+: 19
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Thomas Pfennig, D.O., FAOCO prescribes most
Top Medicare Part D drugs by claim count, 2023
- Ipratropium Bromide
Ipratropium Bromide
123 claims
- Prednisone
Prednisone
50 claims
- Fluticasone Propio… 44
Fluticasone Propionate
44 claims
- Omeprazole 39
Omeprazole
39 claims
- Gentamicin Sulfate 29
Gentamicin Sulfate
29 claims
- Sodium Chloride 27
Sodium Chloride
27 claims
- Azithromycin 21
Azithromycin
21 claims
- Cephalexin 20
Cephalexin
20 claims
| Drug | Claims |
|---|---|
| Ipratropium Bromide | 123 |
| Prednisone | 50 |
| Fluticasone Propionate | 44 |
| Omeprazole | 39 |
| Gentamicin Sulfate | 29 |
| Sodium Chloride Sodium Chloride Irrig Solution | 27 |
| Azithromycin | 21 |
| Cephalexin | 20 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 20 |
| Montelukast Sodium | 19 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Otolaryngology Physician Overview
How Thomas Pfennig, D.O., FAOCO fits within the Otolaryngology Physician landscape nationally.
10,893
Otolaryngology Physician Providers in US
54
States with Otolaryngology Physician
509
Avg Claims per Provider
Thomas Pfennig, D.O., FAOCO's 521 claims are above the specialty average of 509.
Nearby Otolaryngology Physician Providers in Michigan
Other clinicians with the same primary specialty enrolled in Michigan, drawn from the same CMS NPPES roster as Pfennig.
Dr. Thabet Abbarah
M.D.
Waterford, MI
Dr. Meredith Adams
MD
Ann Arbor, MI
Dr. Chad Afman
MD
Grand Rapids, MI
Dr. Nasir Ahmad
MD
Flint, MI
Dr. Jan Akervall
MD
Farmington Hills, MI
Compare Otolaryngology 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 Michigan medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Otolaryngology 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 Thomas Pfennig, D.O., FAOCO's specialty? ▼
Thomas Pfennig, D.O., FAOCO specializes in Otolaryngology Physician and practices in Wyoming, Michigan. Credentials: D.O., FAOCO.
How much does Thomas Pfennig, D.O., FAOCO prescribe under Medicare Part D? ▼
In 2023, Thomas Pfennig, D.O., FAOCO wrote 521 Medicare Part D claims totaling $73K in drug costs for 170 beneficiaries.
Where is Thomas Pfennig, D.O., FAOCO located? ▼
Thomas Pfennig, D.O., FAOCO is located at 1555 44TH ST SW, Wyoming, MI, 49509. Phone: (616) 249-8000.
What is Thomas Pfennig, D.O., FAOCO's NPI number? ▼
Thomas Pfennig, D.O., FAOCO's National Provider Identifier (NPI) is 1508821901, issued on 04/19/2006.
Does Thomas Pfennig, D.O., FAOCO prescribe more brand-name or generic drugs? ▼
Thomas Pfennig, D.O., FAOCO's prescribing is 12% brand-name and 88% generic drugs by claim count, with $63K in brand drug costs.
Does Thomas Pfennig, D.O., FAOCO prescribe opioids? ▼
Yes, Thomas Pfennig, D.O., FAOCO had 22 opioid claims in 2023 with an opioid prescribing rate of 4.2%.
How many Otolaryngology Physician providers are there in the US? ▼
There are 10,893 Otolaryngology Physician providers across 54 states in the US. The average Otolaryngology Physician provider writes 509 Medicare Part D claims per year.
What drugs does Thomas Pfennig, D.O., FAOCO prescribe most often? ▼
Based on 2023 Medicare Part D data, Thomas Pfennig, D.O., FAOCO's most frequently prescribed drugs include Ipratropium Bromide, Prednisone, Fluticasone Propionate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Thomas Pfennig, D.O., FAOCO accept Medicare? ▼
Thomas Pfennig, D.O., FAOCO appears in CMS Medicare data with 521 Part D claims and 170 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Thomas Pfennig, D.O., FAOCO's credentials? ▼
Thomas Pfennig, D.O., FAOCO's NPI is 1508821901 with credentials D.O., FAOCO. 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.