NPI registry status
Active
2026 NPPES data Infectious Disease Physician NPI 1235657313 MD
Verify on CMS → Brendan Mullen, MD
Infectious Disease Physician in Seattle, 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 8,537 in Infectious Disease 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
375
Medicare Part D claims · 44 beneficiaries · Infectious Disease Physician avg: 807
What the federal data shows
Brendan Mullen, MD filed 375 Medicare Part D claims in 2024 as an Infectious Disease Physician in Seattle, Washington.
- 375
- Part D claims, 2024
- ≥56th
- 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.
Federal trust snapshot
What official records show about Brendan Mullen, MD
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1235657313), first enumerated 09/08/2017.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 375 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Practices in an ABMS-board-eligible specialty; board certification not confirmed in federal records.
- State context
State board disciplinary context
Washington statewide board action statistics are published annually — these figures describe aggregate state activity, not Brendan Mullen, MD's individual license status. Verify directly with the state medical board.
Source: WMC annual report 2023
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1235657313 · Infectious Disease Physician
NPI-10 · ENUM-RECENT · TAX-MID · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1235657313
- ENUM-RECENT 2017
- TAX-MID 9K Infectious Disease
- RX-LIGHT 375
- BOOK-THIN 198 in Washington
- PHOTO-ENUM Madison Bangert, M.D · 2017
Brendan Mullen, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
375 ≥ 56th percentile 56% of 1,416,883 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 · 2024
◑
Board-eligible specialty (heuristic, not verified)
Brendan Mullen, MD 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 Brendan Mullen, MD?
Quality data not reportedPrimary specialty
Infectious Disease Physician
Medicare Part D claims
375 54% vs specialty avg
Specialty distribution in Washington
How Infectious Disease 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 Infectious Disease 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).
Practice Address
Provider Details
| NPI | 1235657313 |
|---|---|
| Specialty | Infectious Disease Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 09/08/2017 |
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 Brendan Mullen, MD. To verify Brendan Mullen, MD'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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
375
Total Claims
$70K
Total Drug Cost
44
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 674.233
- Total Day Supply
- 19,518
- Generic Drug Cost
- $6K
Patient Demographics
- Average Patient Age
- 65.5 years
- Avg HCC Risk Score
- 1.88
- Gender Split
- 36% female / 64% male
- Age Distribution
- <65: 16, 65-74: 19, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Brendan Mullen, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Atorvastatin Calcium
Atorvastatin Calcium
34 claims
- Lisinopril
Lisinopril
20 claims
- Amlodipine Besylate
Amlodipine Besylate
15 claims
- Metformin Hcl
Metformin Hcl
15 claims
- Omeprazole
Omeprazole
15 claims
- Duloxetine Hcl 13
Duloxetine Hcl
13 claims
- Cyclobenzaprine Hcl 11
Cyclobenzaprine Hcl
11 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 34 |
| Lisinopril | 20 |
| Amlodipine Besylate | 15 |
| Metformin Hcl | 15 |
| Omeprazole | 15 |
| Duloxetine Hcl | 13 |
| Cyclobenzaprine Hcl | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Infectious Disease Physician Overview
How Brendan Mullen, MD fits within the Infectious Disease Physician landscape nationally.
8,537
Infectious Disease Physician Providers in US
54
States with Infectious Disease Physician
807
Avg Claims per Provider
Brendan Mullen, MD's 375 claims are below the specialty average of 807.
Nationwide Infectious Disease Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Mullen, both outside Washington so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2017)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Infectious Disease Physician Providers in Washington
Other clinicians with the same primary specialty enrolled in Washington, drawn from the same CMS NPPES roster as Mullen.
One of 198 Infectious Disease Physician providers enrolled in Washington, 5 are shown here.
Jan Agosti
Seattle, WA
Dr. Henry Arguinchona
MD
Spokane, WA
Dr. Tara Babu
MD
Seattle, WA
Dr. Neron Balassanian
MD
Bellevue, WA
Dr. Snehal Bansod
MD
Silverdale, WA
Compare Infectious Disease Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Brendan Mullen, MD's specialty? ▼
Brendan Mullen, MD specializes in Infectious Disease Physician and practices in Seattle, Washington. Credentials: MD.
How much does Brendan Mullen, MD prescribe under Medicare Part D? ▼
In 2024, Brendan Mullen, MD wrote 375 Medicare Part D claims totaling $70K in drug costs for 44 beneficiaries.
Where is Brendan Mullen, MD located? ▼
Brendan Mullen, MD is located at 325 9TH AVE, Seattle, WA, 98104. Phone: (206) 520-5000.
What is Brendan Mullen, MD's NPI number? ▼
Brendan Mullen, MD's National Provider Identifier (NPI) is 1235657313, issued on 09/08/2017.
How many Infectious Disease Physician providers are there in the US? ▼
There are 8,537 Infectious Disease Physician providers across 54 states in the US. The average Infectious Disease Physician provider writes 807 Medicare Part D claims per year.
What drugs does Brendan Mullen, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Brendan Mullen, MD'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 Brendan Mullen, MD accept Medicare? ▼
Brendan Mullen, MD appears in CMS Medicare data with 375 Part D claims and 44 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Brendan Mullen, MD's credentials? ▼
Brendan Mullen, MD's NPI is 1235657313 with credentials MD. 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 (2024). 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 August 2026 (NPPES) / 2024 (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 August 2026.