NPI registry status
Active
2026 NPPES data Gastroenterology Physician NPI 1932145646 M.D.
Verify on CMS → Diane Bai, M.D.
Gastroenterology Physician in Tacoma, 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 16,567 in Gastroenterology 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
1K
Medicare Part D claims · 416 beneficiaries · Gastroenterology Physician avg: 833
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Diane Bai, M.D. filed 1,049 Medicare Part D claims in 2023 as a Gastroenterology Physician in Tacoma, Washington.
- 1K
- Part D claims, 2023
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.
Diane Bai, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
1,049 Top 24% higher than 76% 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)
Diane Bai, 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 Diane Bai, M.D.?
Quality data not reportedPrimary specialty
Gastroenterology Physician
Medicare Part D claims
1,049 26% vs specialty avg
Specialty distribution in Washington
How Gastroenterology 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 Gastroenterology 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).
Diane Bai, M.D. appears in the CMS NPPES registry as a Gastroenterology Physician provider holding M.D. credentials at 1112 6TH AVE, Tacoma, WA, 98405, with a listed phone of (253) 272-8664. NPI 1932145646 was issued on 06/21/2006.
Medicare Part D records for calendar year 2023 show 1,049 prescription claims written by this provider, covering 416 Medicare beneficiaries and totaling roughly $280K in drug spend.
Gastroenterology Physician is a mid-sized specialty nationwide, with 16,567 enrolled providers across 54 states and an average of 833 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 | 1932145646 |
|---|---|
| Specialty | Gastroenterology Physician |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 06/21/2006 |
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 Diane Bai, M.D.. To verify Diane Bai, 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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
1,049
Total Claims
$280K
Total Drug Cost
416
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,783
- Total Day Supply
- 44,944
- Generic Drug Cost
- $54K
- Antibiotic Claims
- 22
Patient Demographics
- Average Patient Age
- 69.8 years
- Avg HCC Risk Score
- 1.23
- Gender Split
- 79% female / 21% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Diane Bai, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Omeprazole
Omeprazole
213 claims
- Dicyclomine Hcl
Dicyclomine Hcl
108 claims
- Pantoprazole Sodium 58
Pantoprazole Sodium
58 claims
- Loperamide 51
Loperamide
51 claims
- Famotidine 42
Famotidine
42 claims
- Creon 36
Creon
36 claims
- Peg 3350-Electrolyte 27
Peg 3350-Electrolyte
27 claims
- Sucralfate 27
Sucralfate
27 claims
| Drug | Claims |
|---|---|
| Omeprazole | 213 |
| Dicyclomine Hcl | 108 |
| Pantoprazole Sodium | 58 |
| Loperamide Loperamide Hcl | 51 |
| Famotidine | 42 |
| Creon Lipase/Protease/Amylase | 36 |
| Peg 3350-Electrolyte Sodium Chloride/Nahco3/Kcl/Peg | 27 |
| Sucralfate | 27 |
| Nortriptyline Hcl | 26 |
| Esomeprazole Magnesium | 20 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Gastroenterology Physician Overview
How Diane Bai, M.D. fits within the Gastroenterology Physician landscape nationally.
16,567
Gastroenterology Physician Providers in US
54
States with Gastroenterology Physician
833
Avg Claims per Provider
Diane Bai, M.D.'s 1,049 claims are above the specialty average of 833.
Nearby Gastroenterology Physician Providers in Washington
Other clinicians with the same primary specialty enrolled in Washington, drawn from the same CMS NPPES roster as Bai.
Dr. Bisher Abdullah
MD
Puyallup, WA
Dr. Mohammed Aboelsoud
MD
Bellingham, WA
Abimbola Adike
Poulsbo, WA
Dr. Abhishek Agarwal
MD
Puyallup, WA
Dr. Gaurav Aggarwal
M.D.
Bellevue, WA
Compare Gastroenterology 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 Gastroenterology 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 Diane Bai, M.D.'s specialty? ▼
Diane Bai, M.D. specializes in Gastroenterology Physician and practices in Tacoma, Washington. Credentials: M.D..
How much does Diane Bai, M.D. prescribe under Medicare Part D? ▼
In 2023, Diane Bai, M.D. wrote 1,049 Medicare Part D claims totaling $280K in drug costs for 416 beneficiaries.
Where is Diane Bai, M.D. located? ▼
Diane Bai, M.D. is located at 1112 6TH AVE, Tacoma, WA, 98405. Phone: (253) 272-8664.
What is Diane Bai, M.D.'s NPI number? ▼
Diane Bai, M.D.'s National Provider Identifier (NPI) is 1932145646, issued on 06/21/2006.
How many Gastroenterology Physician providers are there in the US? ▼
There are 16,567 Gastroenterology Physician providers across 54 states in the US. The average Gastroenterology Physician provider writes 833 Medicare Part D claims per year.
What drugs does Diane Bai, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Diane Bai, M.D.'s most frequently prescribed drugs include Omeprazole, Dicyclomine Hcl, Pantoprazole Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Diane Bai, M.D. accept Medicare? ▼
Diane Bai, M.D. appears in CMS Medicare data with 1,049 Part D claims and 416 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Diane Bai, M.D.'s credentials? ▼
Diane Bai, M.D.'s NPI is 1932145646 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
Compiled from official public sources by the PlainDoctor editorial team.