NPI registry status
Active
2026 NPPES data Medical Oncology Physician NPI 1164506887 MD
Verify on CMS → Mehmet Fer, MD
Medical Oncology 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 4,028 in Medical Oncology 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
353
Medicare Part D claims · 72 beneficiaries · Medical Oncology Physician avg: 732
What the federal data shows
Mehmet Fer, MD filed 353 Medicare Part D claims in 2024 as a Medical Oncology Physician in Seattle, Washington.
- 353
- Part D claims, 2024
- Likely
- board-certified (heuristic)
- ≥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 Mehmet Fer, 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 1164506887), first enumerated 10/25/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 353 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
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
3 CMS Care Compare hospital affiliations on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- State context
State board disciplinary context
Washington statewide board action statistics are published annually — these figures describe aggregate state activity, not Mehmet Fer, 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 1164506887 · Medical Oncology Physician
NPI-10 · ENUM-LEGACY · TAX-NARROW · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1164506887
- ENUM-LEGACY 2006
- TAX-NARROW 4,028
- RX-LIGHT 353
- BOOK-THIN 139 in Washington
- PHOTO-ENUM John Chute, M.D. · 2006
Mehmet Fer, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
353 ≥ 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 certification likely (heuristic, not verified)
Mehmet Fer, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 3 hospital affiliations - 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 Mehmet Fer, MD?
Quality data not reportedPrimary specialty
Medical Oncology Physician
Medicare Part D claims
353 52% vs specialty avg
Specialty distribution in Washington
How Medical Oncology 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 Medical Oncology 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 | 1164506887 |
|---|---|
| Specialty | Medical Oncology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 10/25/2006 |
Hospital and facility affiliations
Facilities where Mehmet Fer, MD 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.
According to CMS billing records, Mehmet Fer, MD is affiliated with 3 Medicare-billing facilities.
Northwest Medical Specialties PLLC
Tacoma, WA
Providence Health And Services- Washington
Everett, WA
Swedish Health Services
Seattle, WA
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
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 Mehmet Fer, MD. To verify Mehmet Fer, 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.
353
Total Claims
$546K
Total Drug Cost
72
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 616.067
- Total Day Supply
- 16,440
- Generic Drug Cost
- $80K
- Opioid Claims
- 33 (9.3% rate)
Patient Demographics
- Average Patient Age
- 75.7 years
- Avg HCC Risk Score
- 2.46
- Gender Split
- 75% female / 25% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Mehmet Fer, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Anastrozole
Anastrozole
59 claims
- Potassium Chloride
Potassium Chloride
34 claims
- Brukinsa 20
Brukinsa
20 claims
- Oxycodone Hcl 18
Oxycodone Hcl
18 claims
- Gabapentin 17
Gabapentin
17 claims
- Folic Acid 15
Folic Acid
15 claims
- Loperamide 12
Loperamide
12 claims
- Ondansetron Odt 11
Ondansetron Odt
11 claims
| Drug | Claims |
|---|---|
| Anastrozole | 59 |
| Potassium Chloride | 34 |
| Brukinsa Zanubrutinib | 20 |
| Oxycodone Hcl | 18 |
| Gabapentin | 17 |
| Folic Acid | 15 |
| Loperamide Loperamide Hcl | 12 |
| Ondansetron Odt Ondansetron | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Medical Oncology Physician Overview
How Mehmet Fer, MD fits within the Medical Oncology Physician landscape nationally.
4,028
Medical Oncology Physician Providers in US
53
States with Medical Oncology Physician
732
Avg Claims per Provider
Mehmet Fer, MD's 353 claims are below the specialty average of 732.
Nationwide Medical Oncology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Fer, both outside Washington so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Medical Oncology Physician Providers in Washington
Other clinicians with the same primary specialty enrolled in Washington, drawn from the same CMS NPPES roster as Fer.
One of 139 Medical Oncology Physician providers enrolled in Washington, 5 are shown here.
Dr. Amr Abd-Al-Ghaffar
MD
Wenatchee, WA
Dr. Manoj Agarwal
MD, MBA
Burien, WA
Dr. Rachna Anand
DO
Olympia, WA
Dr. Willard Andes
MD
Longview, WA
Frederick Appelbaum
Seattle, WA
Compare Medical Oncology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Mehmet Fer, MD's specialty? ▼
Mehmet Fer, MD specializes in Medical Oncology Physician and practices in Seattle, Washington. Credentials: MD.
How much does Mehmet Fer, MD prescribe under Medicare Part D? ▼
In 2024, Mehmet Fer, MD wrote 353 Medicare Part D claims totaling $546K in drug costs for 72 beneficiaries.
Where is Mehmet Fer, MD located? ▼
Mehmet Fer, MD is located at 1221 MADISON ST, Seattle, WA, 98104. Phone: (206) 860-6488.
What is Mehmet Fer, MD's NPI number? ▼
Mehmet Fer, MD's National Provider Identifier (NPI) is 1164506887, issued on 10/25/2006.
Does Mehmet Fer, MD prescribe opioids? ▼
Yes, Mehmet Fer, MD had 33 opioid claims in 2024 with an opioid prescribing rate of 9.3%.
How many Medical Oncology Physician providers are there in the US? ▼
There are 4,028 Medical Oncology Physician providers across 53 states in the US. The average Medical Oncology Physician provider writes 732 Medicare Part D claims per year.
What drugs does Mehmet Fer, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Mehmet Fer, MD's most frequently prescribed drugs include Anastrozole, Potassium Chloride, Brukinsa. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Mehmet Fer, MD accept Medicare? ▼
Mehmet Fer, MD appears in CMS Medicare data with 353 Part D claims and 72 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mehmet Fer, MD's credentials? ▼
Mehmet Fer, MD's NPI is 1164506887 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.