2026 NPPES data Specialist NPI 1538117205 M.D.
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GREGORY BELL, M.D.

Specialist in OLYMPIA, Washington. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
3K
Medicare Part D claims · 396 beneficiaries · Specialist avg: 1K
Generic prescribing
93%
generic claims · 7% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: GREGORY BELL, M.D. is a Specialist ([object Object]) practicing in OLYMPIA, Washington with a Medicare Part D prescribing footprint of 3K claims across 396 beneficiaries — 7% brand-name prescribing .

What stands out: GREGORY BELL, M.D. filed 3,084 Medicare Part D claims in 2023 across OLYMPIA, Washington. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

GREGORY BELL, M.D. at a glance

Quality data not reported

NPI registry status

Active

Issued 05/05/2006

NPI 1538117205

Primary specialty

Specialist

High-volume

69,658 US NPIs in this specialty

Medicare Part D claims

3,084 109% vs specialty avg

2023 prescription claims

Specialty avg: 1,474

Specialty distribution in Washington

How Specialist compares to other specialties among Washington providers

Washington providers

Specialist share within Washington

1. Specialist42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Specialist share within Washington

Specialty board-certification context

Estimated specialty board-certified rate — Specialist (ABMS / AOA reference)

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

Est. board-certified rate (Specialist) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Specialist) — 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).

GREGORY BELL, M.D. is a Specialist provider practicing in OLYMPIA, Washington, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1538117205. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

GREGORY BELL, M.D. appears in the CMS NPPES registry as a Specialist provider holding M.D. credentials at 525 LILLY RD NE, OLYMPIA, WA, 98506, with a listed phone of (360) 413-8550. NPI 1538117205 was issued on 05/05/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what BELL 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 3,084 prescription claims written by this provider, covering 396 Medicare beneficiaries and totaling roughly $545K in drug spend, split 7% brand-name and 93% generic by claim count. 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.

Specialist is a high-volume specialty nationwide, with 69,658 enrolled providers across 55 states and an average of 1,474 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

525 LILLY RD NE
OLYMPIA, WA 98506

Provider Details

NPI 1538117205
Specialty Specialist
Credentials M.D.
Gender Male
NPI Issued 05/05/2006

Hospital and facility affiliations

Facilities where GREGORY BELL, M.D. 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.

MULTICARE HEALTH SYSTEM
TACOMA, 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 GREGORY BELL, M.D.. To verify GREGORY BELL, 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 · Generic-heavy

GREGORY BELL, M.D. — brand share 7.0%
Specialty average (est.)

7% brand-name claims vs 93% generic, on 3,084 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.

3,084
Total Claims
$545K
Total Drug Cost
396
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
4,667
Total Day Supply
134,925
Brand vs Generic
7% brand / 93% generic
Brand Drug Cost
$443K
Generic Drug Cost
$102K

Patient Demographics

Average Patient Age
72.8 years
Avg HCC Risk Score
1.66
Gender Split
68% female / 32% male
Age Distribution
<65: 71, 65-74: 123, 75-84: 149, 85+: 53

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Memantine Hcl
507
Donepezil Hcl
444
Carbidopa-Levodopa
Carbidopa/Levodopa
253
Gabapentin
95
Levetiracetam
95
Topiramate
95
Rasagiline Mesylate
87
Sumatriptan Succinate
64
Naratriptan Hcl
61
Rivastigmine
Rivastigmine Tartrate
54

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Specialist Overview

How GREGORY BELL, M.D. fits within the Specialist landscape nationally.

69,658
Specialist Providers in US
55
States with Specialist
1,474
Avg Claims per Provider

GREGORY BELL, M.D.'s 3,084 claims are above the specialty average of 1,474.

Nearby Specialist Providers in Washington

Other clinicians with the same primary specialty enrolled in Washington, drawn from the same CMS NPPES roster as BELL.

Compare Specialist nationally: see state-by-state distribution →

Frequently Asked Questions

What is GREGORY BELL, M.D.'s specialty?
GREGORY BELL, M.D. specializes in Specialist and practices in OLYMPIA, Washington. Credentials: M.D..
How much does GREGORY BELL, M.D. prescribe under Medicare Part D?
In 2023, GREGORY BELL, M.D. wrote 3,084 Medicare Part D claims totaling $545K in drug costs for 396 beneficiaries.
Where is GREGORY BELL, M.D. located?
GREGORY BELL, M.D. is located at 525 LILLY RD NE, OLYMPIA, WA, 98506. Phone: (360) 413-8550.
What is GREGORY BELL, M.D.'s NPI number?
GREGORY BELL, M.D.'s National Provider Identifier (NPI) is 1538117205, issued on 05/05/2006.
Does GREGORY BELL, M.D. prescribe more brand-name or generic drugs?
GREGORY BELL, M.D.'s prescribing is 7% brand-name and 93% generic drugs by claim count, with $443K in brand drug costs.
How many Specialist providers are there in the US?
There are 69,658 Specialist providers across 55 states in the US. The average Specialist provider writes 1,474 Medicare Part D claims per year.
What drugs does GREGORY BELL, M.D. prescribe most often?
Based on 2023 Medicare Part D data, GREGORY BELL, M.D.'s most frequently prescribed drugs include Memantine Hcl, Donepezil Hcl, Carbidopa-Levodopa. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does GREGORY BELL, M.D. accept Medicare?
GREGORY BELL, M.D. appears in CMS Medicare data with 3,084 Part D claims and 396 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify GREGORY BELL, M.D.'s credentials?
GREGORY BELL, M.D.'s NPI is 1538117205 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

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