2026 NPPES data Internal Medicine Physician NPI 1255416368 MD
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Zhimin Zhai, MD

Internal Medicine Physician in Bellevue, 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 172,858 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 · 779 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
88%
generic claims · 11% brand-name · higher generic rates reduce patient out-of-pocket costs
Compiled from official public sources by the PlainDoctor editorial team.

What the federal data shows

Zhimin Zhai, MD filed 10,499 Medicare Part D claims in 2023 as a Internal Medicine Physician in Bellevue, Washington, prescribing 88% generic.

10K
Part D claims, 2023
88%
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.

Zhimin Zhai, MD's Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

10,499 Top 2% higher than 98% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). Below this entry. 1,600–1,800: 19,072 prescribers (1%). Below this entry. 1,800–2,000: 16,451 prescribers (1%). Below this entry. 2,000–2,200: 213,991 prescribers (16%). This entry sits in this band. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

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)

Zhimin Zhai, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 5 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 Zhimin Zhai, MD?

Quality data not reported

NPI registry status

Active

Issued 10/26/2006

NPI 1255416368

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

10,499 287% vs specialty avg

2023 prescription claims

Specialty avg: 2,716

Specialty distribution in Washington

How Internal Medicine Physician compares to other specialties among Washington providers

Washington providers

Largest specialties in Washington (% of in-state providers)

Mental Health Counselor — 8.6%Mental Health Counselor8.6%Massage Therapist — 6.5%Massage Therapist6.5%Counselor — 5.7%Counselor5.7%Behavior Technician — 4.5%Behavior Technician4.5%Pharmacist — 4%Pharmacist4%Physical Therapist — 3.6%Physical Therapist3.6%Internal Medicine Physician — 1.9%Internal Medicine Physician1.9%
Largest specialties in Washington (% of in-state providers)

Specialty board-certification context

Estimated specialty board-certified rate — Internal Medicine Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Internal Medicine Physician ABMS/AOA estimate

Est. board-certified rate (Internal Medicine Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Internal Medicine Physician) — ABMS / AOA estimate

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).

Zhimin Zhai, MD appears in the CMS NPPES registry as a Internal Medicine Physician provider holding MD credentials at 11695 NE 4TH ST, Bellevue, WA, 98004, with a listed phone of (425) 637-1855. NPI 1255416368 was issued on 10/26/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Zhai most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 10,499 prescription claims written by this provider, covering 779 Medicare beneficiaries and totaling roughly $934K in drug spend, split 11% brand-name and 88% generic by claim count, with an opioid prescribing rate of 1.8%. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Internal Medicine Physician is a high-volume specialty nationwide, with 172,858 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

11695 NE 4TH ST
Bellevue, WA 98004

Provider Details

NPI 1255416368
Specialty Internal Medicine Physician
Credentials MD
Gender Female
NPI Issued 10/26/2006

Hospital and facility affiliations

Facilities where Zhimin Zhai, 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, Zhimin Zhai, MD is affiliated with 5 Medicare-billing facilities across 2 states, 1 of which carry a CMS Hospital overall star rating.

Virginia Mason Medical Center
★★★★★ 5/5
Bellevue, WA
Acute Care Hospitals
CMS CCN: 500005
Public Hospital District 1-A OF Whitman County
Pullman, WA
Select Outpatient Services Inc
Glenview, IL
Select Rehabilitation, LLC
Glenview, IL
Valley Medical Group-Renton
Renton, 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 Zhimin Zhai, MD. To verify Zhimin Zhai, 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.

Brand vs generic prescribing mix · Typical

Zhimin Zhai, MD — brand share 11.0%
Internal Medicine Physician average

11% brand-name claims vs 88% generic, on 10,499 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.

10,499
Total Claims
$934K
Total Drug Cost
779
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
26,001
Total Day Supply
770,108
Brand vs Generic
11% brand / 88% generic
Brand Drug Cost
$705K
Generic Drug Cost
$225K
Opioid Claims
185 (1.8% rate)
Antibiotic Claims
186

Patient Demographics

Average Patient Age
76.4 years
Avg HCC Risk Score
1.14
Gender Split
70% female / 30% male
Age Distribution
<65: 18, 65-74: 335, 75-84: 278, 85+: 148

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What Zhimin Zhai, MD prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Atorvastatin Calcium
632
Levothyroxine Sodium
574
Amlodipine Besylate
362
Losartan Potassium
357
Rosuvastatin Calcium
332
Lisinopril
327
Omeprazole
264
Metoprolol Succinate
255
Simvastatin
240
Furosemide
216

* 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 Zhimin Zhai, MD fits within the Internal Medicine Physician landscape nationally.

172,858
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider

Zhimin Zhai, MD's 10,499 claims are above 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 Zhai.

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.

Frequently Asked Questions

What is Zhimin Zhai, MD's specialty?
Zhimin Zhai, MD specializes in Internal Medicine Physician and practices in Bellevue, Washington. Credentials: MD.
How much does Zhimin Zhai, MD prescribe under Medicare Part D?
In 2023, Zhimin Zhai, MD wrote 10,499 Medicare Part D claims totaling $934K in drug costs for 779 beneficiaries.
Where is Zhimin Zhai, MD located?
Zhimin Zhai, MD is located at 11695 NE 4TH ST, Bellevue, WA, 98004. Phone: (425) 637-1855.
What is Zhimin Zhai, MD's NPI number?
Zhimin Zhai, MD's National Provider Identifier (NPI) is 1255416368, issued on 10/26/2006.
Does Zhimin Zhai, MD prescribe more brand-name or generic drugs?
Zhimin Zhai, MD's prescribing is 11% brand-name and 88% generic drugs by claim count, with $705K in brand drug costs.
Does Zhimin Zhai, MD prescribe opioids?
Yes, Zhimin Zhai, MD had 185 opioid claims in 2023 with an opioid prescribing rate of 1.8%.
How many Internal Medicine Physician providers are there in the US?
There are 172,858 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 Zhimin Zhai, MD prescribe most often?
Based on 2023 Medicare Part D data, Zhimin Zhai, MD's most frequently prescribed drugs include Atorvastatin Calcium, Levothyroxine Sodium, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Zhimin Zhai, MD accept Medicare?
Zhimin Zhai, MD appears in CMS Medicare data with 10,499 Part D claims and 779 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Zhimin Zhai, MD's credentials?
Zhimin Zhai, MD's NPI is 1255416368 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

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.