NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1407891641 M.D
Verify on CMS → Peter Reissmann, M.D
Internal Medicine Physician in Bellingham, Washington.
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
161
Medicare Part D claims · 32 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
80%
generic claims · 20% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Peter Reissmann, M.D filed 161 Medicare Part D claims in 2023 as an Internal Medicine Physician in Bellingham, Washington, prescribing 80% generic.
- 161
- Part D claims, 2023
- 80%
- generic prescribing
- ≥35th
- 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.
Peter Reissmann, M.D's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
161 ≥ 35th percentile 35% 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
◑
Board-eligible specialty (heuristic, not verified)
Peter Reissmann, M.D 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 Peter Reissmann, M.D?
Quality data not reportedPrimary specialty
Internal Medicine Physician
Medicare Part D claims
161 94% vs specialty avg
Specialty distribution in Washington
How Internal Medicine Physician compares to other specialties among Washington 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).
Peter Reissmann, M.D appears in the CMS NPPES registry as an Internal Medicine Physician provider holding M.D credentials at 3301 SQUALICUM PKWY, Bellingham, WA, 98225, with a listed phone of (360) 788-8222. NPI 1407891641 was issued on 06/20/2006.
Medicare Part D records for calendar year 2023 show 161 prescription claims written by this provider, covering 32 Medicare beneficiaries and totaling roughly $348K in drug spend, split 20% brand-name and 80% generic by claim count.
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 | 1407891641 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | M.D |
| Gender | Male |
| NPI Issued | 06/20/2006 |
License & disciplinary context - Washington WMC 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 ~34K Washington medical licensees in 2023 - they are NOT specific to Peter Reissmann, M.D. To verify Peter Reissmann, M.D's current license status, search the WMC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
88
Total board actions, Washington 2023
Across 85 cases
2.59
Actions per 1,000 licensees
Washington statewide rate
probation
Most common action type
31 cases
WMC 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 Washington disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Peter Reissmann, M.D - brand share 20.0%
Internal Medicine Physician average
20% brand-name claims vs 80% generic, on 161 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.
161
Total Claims
$348K
Total Drug Cost
32
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 221
- Total Day Supply
- 5,280
- Brand vs Generic
- 20% brand / 80% generic
- Brand Drug Cost
- $343K
- Generic Drug Cost
- $5K
Patient Demographics
- Average Patient Age
- 74.5 years
- Avg HCC Risk Score
- 1.73
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Peter Reissmann, M.D prescribes most
Top Medicare Part D drugs by claim count, 2023
- Letrozole
Letrozole
24 claims
- Lonsurf
Lonsurf
17 claims
- Anastrozole
Anastrozole
15 claims
- Dexamethasone
Dexamethasone
13 claims
- Loperamide
Loperamide
12 claims
| Drug | Claims |
|---|---|
| Letrozole | 24 |
| Lonsurf Trifluridine/Tipiracil Hcl | 17 |
| Anastrozole | 15 |
| Dexamethasone | 13 |
| Loperamide Loperamide Hcl | 12 |
* 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 Peter Reissmann, 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
Peter Reissmann, M.D's 161 claims are below the specialty average of 2,716.
Nearby Internal Medicine Physician Providers in Washington
Other clinicians with the same primary specialty enrolled in Washington, drawn from the same CMS NPPES roster as Reissmann.
Dr. Sheida Aalami
M.D.
Seattle, WA
Dr. Barry Aaronson
MD
Seattle, WA
Gloria Abacan
Prosser, WA
Rebecca Abay
Seattle, WA
Syed Abbas
Tacoma, WA
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 Washington 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 Peter Reissmann, M.D's specialty? ▼
Peter Reissmann, M.D specializes in Internal Medicine Physician and practices in Bellingham, Washington. Credentials: M.D.
How much does Peter Reissmann, M.D prescribe under Medicare Part D? ▼
In 2023, Peter Reissmann, M.D wrote 161 Medicare Part D claims totaling $348K in drug costs for 32 beneficiaries.
Where is Peter Reissmann, M.D located? ▼
Peter Reissmann, M.D is located at 3301 SQUALICUM PKWY, Bellingham, WA, 98225. Phone: (360) 788-8222.
What is Peter Reissmann, M.D's NPI number? ▼
Peter Reissmann, M.D's National Provider Identifier (NPI) is 1407891641, issued on 06/20/2006.
Does Peter Reissmann, M.D prescribe more brand-name or generic drugs? ▼
Peter Reissmann, M.D's prescribing is 20% brand-name and 80% generic drugs by claim count, with $343K in brand drug costs.
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 Peter Reissmann, M.D prescribe most often? ▼
Based on 2023 Medicare Part D data, Peter Reissmann, M.D's most frequently prescribed drugs include Letrozole, Lonsurf, Anastrozole. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Peter Reissmann, M.D accept Medicare? ▼
Peter Reissmann, M.D appears in CMS Medicare data with 161 Part D claims and 32 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Peter Reissmann, M.D's credentials? ▼
Peter Reissmann, M.D's NPI is 1407891641 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
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.