2026 NPPES data Naturopath NPI 1639219827 ND
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MICHELE GRINDSTAFF, ND

Naturopath in EDMONDS, 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
186
Medicare Part D claims · 14 beneficiaries · Naturopath avg: 120
Generic prescribing
75%
generic claims · 25% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

MICHELE GRINDSTAFF, ND filed 186 Medicare Part D claims in 2023 as a Naturopath in EDMONDS, Washington, prescribing 75% generic.

186
Part D claims, 2023
75%
generic prescribing

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.

MICHELE GRINDSTAFF, ND's Medicare Part D volume vs every U.S. prescriber

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

186 35th percentile higher than 35% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). This entry sits in this band. 200–400: 182,923 prescribers (13%). Above this entry. 400–600: 90,619 prescribers (7%). Above this entry. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. 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

What does the federal data show about MICHELE GRINDSTAFF, ND?

Quality data not reported

NPI registry status

Active

Issued 02/07/2007

NPI 1639219827

Primary specialty

Naturopath

Mid-sized

6,661 US NPIs in this specialty

Medicare Part D claims

186 55% vs specialty avg

2023 prescription claims

Specialty avg: 120

Specialty distribution in Washington

How Naturopath compares to other specialties among Washington providers

Washington providers

Naturopath share within Washington

1. Naturopath42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Naturopath share within Washington

Specialty board-certification context

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

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

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

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

MICHELE GRINDSTAFF, ND appears in the CMS NPPES registry as a Naturopath provider holding ND credentials at 21827 76TH AVE W STE 201, EDMONDS, WA, 98026, with a listed phone of (206) 803-1045. NPI 1639219827 was issued on 02/07/2007. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what GRINDSTAFF 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 186 prescription claims written by this provider, covering 14 Medicare beneficiaries and totaling roughly $8K in drug spend, split 25% brand-name and 75% 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.

Naturopath is a mid-sized specialty nationwide, with 6,661 enrolled providers across 53 states and an average of 120 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

21827 76TH AVE W STE 201
EDMONDS, WA 98026

Provider Details

NPI 1639219827
Specialty Naturopath
Credentials ND
Gender Female
NPI Issued 02/07/2007

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 MICHELE GRINDSTAFF, ND. To verify MICHELE GRINDSTAFF, ND'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 · Above average

MICHELE GRINDSTAFF, ND — brand share 25.0%
Specialty average (est.)

25% brand-name claims vs 75% generic, on 186 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.

186
Total Claims
$8K
Total Drug Cost
14
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
262
Total Day Supply
7,712
Brand vs Generic
25% brand / 75% generic
Brand Drug Cost
$2K
Generic Drug Cost
$6K

Patient Demographics

Average Patient Age
67.6 years
Avg HCC Risk Score
0.67

Top Prescribed Drugs (Medicare Part D)

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

What MICHELE GRINDSTAFF, ND 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
Liothyronine Sodium
36
Hydrocortisone
25
Levothyroxine Sodium
22
Estradiol (Twice Weekly)
Estradiol
14
Acyclovir
13
Progesterone
"Progesterone
N/A

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

Naturopath Overview

How MICHELE GRINDSTAFF, ND fits within the Naturopath landscape nationally.

6,661
Naturopath Providers in US
53
States with Naturopath
120
Avg Claims per Provider

MICHELE GRINDSTAFF, ND's 186 claims are above the specialty average of 120.

Nearby Naturopath Providers in Washington

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

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

Frequently Asked Questions

What is MICHELE GRINDSTAFF, ND's specialty?
MICHELE GRINDSTAFF, ND specializes in Naturopath and practices in EDMONDS, Washington. Credentials: ND.
How much does MICHELE GRINDSTAFF, ND prescribe under Medicare Part D?
In 2023, MICHELE GRINDSTAFF, ND wrote 186 Medicare Part D claims totaling $8K in drug costs for 14 beneficiaries.
Where is MICHELE GRINDSTAFF, ND located?
MICHELE GRINDSTAFF, ND is located at 21827 76TH AVE W STE 201, EDMONDS, WA, 98026. Phone: (206) 803-1045.
What is MICHELE GRINDSTAFF, ND's NPI number?
MICHELE GRINDSTAFF, ND's National Provider Identifier (NPI) is 1639219827, issued on 02/07/2007.
Does MICHELE GRINDSTAFF, ND prescribe more brand-name or generic drugs?
MICHELE GRINDSTAFF, ND's prescribing is 25% brand-name and 75% generic drugs by claim count, with $2K in brand drug costs.
How many Naturopath providers are there in the US?
There are 6,661 Naturopath providers across 53 states in the US. The average Naturopath provider writes 120 Medicare Part D claims per year.
What drugs does MICHELE GRINDSTAFF, ND prescribe most often?
Based on 2023 Medicare Part D data, MICHELE GRINDSTAFF, ND's most frequently prescribed drugs include Liothyronine Sodium, Hydrocortisone, Levothyroxine Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does MICHELE GRINDSTAFF, ND accept Medicare?
MICHELE GRINDSTAFF, ND appears in CMS Medicare data with 186 Part D claims and 14 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify MICHELE GRINDSTAFF, ND's credentials?
MICHELE GRINDSTAFF, ND's NPI is 1639219827 with credentials ND. 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